Util.cpp

/*
* Glide64 - Glide video plugin for Nintendo 64 emulators.
* Copyright (c) 2002  Dave2001
* Copyright (c) 2003-2009  Sergey 'Gonetz' Lipski
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

//****************************************************************
//
// Glide64 - Glide Plugin for Nintendo 64 emulators
// Project started on December 29th, 2001
//
// Authors:
// Dave2001, original author, founded the project in 2001, left it in 2002
// Gugaman, joined the project in 2002, left it in 2002
// Sergey 'Gonetz' Lipski, joined the project in 2002, main author since fall of 2002
// Hiroshi 'KoolSmoky' Morii, joined the project in 2007
//
//****************************************************************
//
// To modify Glide64:
// * Write your name and (optional)email, commented by your work, so I know who did it, and so that you can find which parts you modified when it comes time to send it to me.
// * Do NOT send me the whole project or file that you modified.  Take out your modified code sections, and tell me where to put them.  If people sent the whole thing, I would have many different versions, but no idea how to combine them all.
//
//****************************************************************

#include <math.h>
#include "Gfx_1.3.h"
#include "Util.h"
#include "Combine.h"
#include "3dmath.h"
#include "Debugger.h"
#include "TexCache.h"
#include "DepthBufferRender.h"

#define Vj rdp.vtxbuf2[j]
#define Vi rdp.vtxbuf2[i]

VERTEX *vtx_list1[32];  // vertex indexing
VERTEX *vtx_list2[32];

//
// util_init - initialize data for the functions in this file
//

void util_init ()
{
  for (int i=0; i<32; i++)
  {
    vtx_list1[i] = &rdp.vtx1[i];
    vtx_list2[i] = &rdp.vtx2[i];
  }
}

static wxUint32 u_cull_mode = 0;

//software backface culling. Gonetz
// mega modifications by Dave2001
int cull_tri(VERTEX **v) // type changed to VERTEX** [Dave2001]
{
  int i;

  if (v[0]->scr_off & v[1]->scr_off & v[2]->scr_off)
  {
    LRDP (" clipped\n");
    return TRUE;
  }

  // Triangle can't be culled, if it need clipping
  int draw = FALSE;

  for (i=0; i<3; i++)
  {
    if (!v[i]->screen_translated)
    {
      v[i]->sx = rdp.view_trans[0] + v[i]->x_w * rdp.view_scale[0] + rdp.offset_x;
      v[i]->sy = rdp.view_trans[1] + v[i]->y_w * rdp.view_scale[1] + rdp.offset_y;
      v[i]->sz = rdp.view_trans[2] + v[i]->z_w * rdp.view_scale[2];
      v[i]->screen_translated = 1;
    }
    if (v[i]->w < 0.01f) //need clip_z. can't be culled now
      draw = 1;
  }

  u_cull_mode = (rdp.flags & CULLMASK);
  if (draw || u_cull_mode == 0 || u_cull_mode == CULLMASK) //no culling set
  {
    u_cull_mode >>= CULLSHIFT;
    return FALSE;
  }

#define SW_CULLING
#ifdef SW_CULLING
#if 1 // H.Morii - faster float comparisons with zero area check added

  const float x1 = v[0]->sx - v[1]->sx;
  const float y1 = v[0]->sy - v[1]->sy;
  const float x2 = v[2]->sx - v[1]->sx;
  const float y2 = v[2]->sy - v[1]->sy;
  const float area = y1*x2 - x1*y2;

  const int iarea = *(int*)&area;
  const unsigned int mode = (u_cull_mode << 19UL);
  u_cull_mode >>= CULLSHIFT;

  if ((iarea & 0x7FFFFFFF) == 0)
  {
	  LRDP (" zero area triangles\n");
      return TRUE;
  }

  if ((rdp.flags & CULLMASK) && ((int)(iarea ^ mode)) >= 0)
  {
	  LRDP (" culled\n");
      return TRUE;
  }
#else

  float x1 = v[0]->sx - v[1]->sx;
  float y1 = v[0]->sy - v[1]->sy;
  float x2 = v[2]->sx - v[1]->sx;
  float y2 = v[2]->sy - v[1]->sy;

  u_cull_mode >>= CULLSHIFT;
  switch (u_cull_mode)
  {
  case 1: // cull front
    //    if ((x1*y2 - y1*x2) < 0.0f) //counter-clockwise, positive
    if ((y1*x2-x1*y2) < 0.0f) //counter-clockwise, positive
    {
      LRDP (" culled!\n");
      return TRUE;
    }
    return FALSE;
  case 2: // cull back
    //    if ((x1*y2 - y1*x2) >= 0.0f) //clockwise, negative
    if ((y1*x2-x1*y2) >= 0.0f) //clockwise, negative
    {
      LRDP (" culled!\n");
      return TRUE;
    }
    return FALSE;
  }
#endif
#endif

  return FALSE;
}


void apply_shade_mods (VERTEX *v)
{
  float col[4];
  wxUint32 mod;
  memcpy (col, rdp.col, 16);

  if (rdp.cmb_flags)
  {
    if (v->shade_mod == 0)
      v->color_backup = *(wxUint32*)(&(v->b));
    else
      *(wxUint32*)(&(v->b)) = v->color_backup;
    mod = rdp.cmb_flags;
    if (mod & CMB_SET)
    {
      if (col[0] > 1.0f) col[0] = 1.0f;
      if (col[1] > 1.0f) col[1] = 1.0f;
      if (col[2] > 1.0f) col[2] = 1.0f;
      if (col[0] < 0.0f) col[0] = 0.0f;
      if (col[1] < 0.0f) col[1] = 0.0f;
      if (col[2] < 0.0f) col[2] = 0.0f;
      v->r = (wxUint8)(255.0f * col[0]);
      v->g = (wxUint8)(255.0f * col[1]);
      v->b = (wxUint8)(255.0f * col[2]);
    }
    if (mod & CMB_A_SET)
    {
      if (col[3] > 1.0f) col[3] = 1.0f;
      if (col[3] < 0.0f) col[3] = 0.0f;
      v->a = (wxUint8)(255.0f * col[3]);
    }
    if (mod & CMB_SETSHADE_SHADEALPHA)
    {
      v->r = v->g = v->b = v->a;
    }
    if (mod & CMB_MULT_OWN_ALPHA)
    {
      float percent = v->a / 255.0f;
      v->r = (wxUint8)(v->r * percent);
      v->g = (wxUint8)(v->g * percent);
      v->b = (wxUint8)(v->b * percent);
    }
    if (mod & CMB_MULT)
    {
      if (col[0] > 1.0f) col[0] = 1.0f;
      if (col[1] > 1.0f) col[1] = 1.0f;
      if (col[2] > 1.0f) col[2] = 1.0f;
      if (col[0] < 0.0f) col[0] = 0.0f;
      if (col[1] < 0.0f) col[1] = 0.0f;
      if (col[2] < 0.0f) col[2] = 0.0f;
      v->r = (wxUint8)(v->r * col[0]);
      v->g = (wxUint8)(v->g * col[1]);
      v->b = (wxUint8)(v->b * col[2]);
    }
    if (mod & CMB_A_MULT)
    {
      if (col[3] > 1.0f) col[3] = 1.0f;
      if (col[3] < 0.0f) col[3] = 0.0f;
      v->a = (wxUint8)(v->a * col[3]);
    }
    if (mod & CMB_SUB)
    {
      int r = v->r - (int)(255.0f * rdp.coladd[0]);
      int g = v->g - (int)(255.0f * rdp.coladd[1]);
      int b = v->b - (int)(255.0f * rdp.coladd[2]);
      if (r < 0) r = 0;
      if (g < 0) g = 0;
      if (b < 0) b = 0;
      v->r = (wxUint8)r;
      v->g = (wxUint8)g;
      v->b = (wxUint8)b;
    }
    if (mod & CMB_A_SUB)
    {
		    int a = v->a - (int)(255.0f * rdp.coladd[3]);
        if (a < 0) a = 0;
        v->a = (wxUint8)a;
    }
    if (mod & CMB_ADD)
    {
      int r = v->r + (int)(255.0f * rdp.coladd[0]);
      int g = v->g + (int)(255.0f * rdp.coladd[1]);
      int b = v->b + (int)(255.0f * rdp.coladd[2]);
      if (r > 255) r = 255;
      if (g > 255) g = 255;
      if (b > 255) b = 255;
      v->r = (wxUint8)r;
      v->g = (wxUint8)g;
      v->b = (wxUint8)b;
    }
    if (mod & CMB_A_ADD)
    {
		    int a = v->a + (int)(255.0f * rdp.coladd[3]);
        if (a > 255) a = 255;
        v->a = (wxUint8)a;
    }
    if (mod & CMB_COL_SUB_OWN)
    {
      int r = (wxUint8)(255.0f * rdp.coladd[0]) - v->r;
      int g = (wxUint8)(255.0f * rdp.coladd[1]) - v->g;
      int b = (wxUint8)(255.0f * rdp.coladd[2]) - v->b;
      if (r < 0) r = 0;
      if (g < 0) g = 0;
      if (b < 0) b = 0;
      v->r = (wxUint8)r;
      v->g = (wxUint8)g;
      v->b = (wxUint8)b;
    }
    v->shade_mod = cmb.shade_mod_hash;
  }
  if (rdp.cmb_flags_2 & CMB_INTER)
  {
    v->r = (wxUint8)(rdp.col_2[0] * rdp.shade_factor * 255.0f + v->r * (1.0f - rdp.shade_factor));
    v->g = (wxUint8)(rdp.col_2[1] * rdp.shade_factor * 255.0f + v->g * (1.0f - rdp.shade_factor));
    v->b = (wxUint8)(rdp.col_2[2] * rdp.shade_factor * 255.0f + v->b * (1.0f - rdp.shade_factor));
    v->shade_mod = cmb.shade_mod_hash;
  }
}

static int dzdx = 0;
static int deltaZ = 0;
VERTEX **org_vtx;

void draw_tri (VERTEX **vtx, wxUint16 linew)
{
  deltaZ = dzdx = 0;
  if (linew == 0 && (fb_depth_render_enabled || (rdp.rm & 0xC00) == 0xC00))
  {
    double X0 = vtx[0]->sx / rdp.scale_x;
    double Y0 = vtx[0]->sy / rdp.scale_y;
    double X1 = vtx[1]->sx / rdp.scale_x;
    double Y1 = vtx[1]->sy / rdp.scale_y;
    double X2 = vtx[2]->sx / rdp.scale_x;
    double Y2 = vtx[2]->sy / rdp.scale_y;
    double diffy_02 = Y0 - Y2;
    double diffy_12 = Y1 - Y2;
    double diffx_02 = X0 - X2;
    double diffx_12 = X1 - X2;

    double denom = (diffx_02 * diffy_12 - diffx_12 * diffy_02);
    if(denom*denom > 0.0)
    {
      double diffz_02 = vtx[0]->sz - vtx[2]->sz;
      double diffz_12 = vtx[1]->sz - vtx[2]->sz;
      double fdzdx = (diffz_02 * diffy_12 - diffz_12 * diffy_02) / denom;
      if ((rdp.rm & 0xC00) == 0xC00) {
        // Calculate deltaZ per polygon for Decal z-mode
        double fdzdy = (diffz_02 * diffx_12 - diffz_12 * diffx_02) / denom;
        double fdz = fabs(fdzdx) + fabs(fdzdy);
        if ((settings.hacks & hack_Zelda) && (rdp.rm & 0x800))
          fdz *= 4.0;  // Decal mode in Zelda sometimes needs mutiplied deltaZ to work correct, e.g. roads
        deltaZ = max(8, (int)fdz);
      }
      dzdx = (int)(fdzdx * 65536.0);
    }
  }

  org_vtx = vtx;

  for (int i=0; i<3; i++)
  {
    VERTEX *v = vtx[i];

    if (v->uv_calculated != rdp.tex_ctr)
    {
#ifdef EXTREME_LOGGING
      FRDP(" * CALCULATING VERTEX U/V: %d\n", v->number);
#endif
      v->uv_calculated = rdp.tex_ctr;

      if (!(rdp.geom_mode & 0x00020000))
      {
        if (!(rdp.geom_mode & 0x00000200))
        {
          if (rdp.geom_mode & 0x00000004) // flat shading
          {
            int flag = min(2, (rdp.cmd1 >> 24) & 3);
            v->a = vtx[flag]->a;
            v->b = vtx[flag]->b;
            v->g = vtx[flag]->g;
            v->r = vtx[flag]->r;
#ifdef EXTREME_LOGGING
            FRDP(" * Flat shaded, flag%d - r: %d, g: %d, b: %d, a: %d\n", flag, v->r, v->g, v->b, v->a);
#endif
          }
          else  // prim color
          {
#ifdef EXTREME_LOGGING
            FRDP(" * Prim shaded %08lx\n", rdp.prim_color);
#endif
            v->a = (wxUint8)(rdp.prim_color & 0xFF);
            v->b = (wxUint8)((rdp.prim_color >> 8) & 0xFF);
            v->g = (wxUint8)((rdp.prim_color >> 16) & 0xFF);
            v->r = (wxUint8)((rdp.prim_color >> 24) & 0xFF);
          }
        }
      }

      // Fix texture coordinates
      if (!v->uv_scaled)
      {
        v->ou *= rdp.tiles[rdp.cur_tile].s_scale;
        v->ov *= rdp.tiles[rdp.cur_tile].t_scale;
        v->uv_scaled = 1;
        if (!rdp.Persp_en)
        {
//          v->oow = v->w = 1.0f;
          v->ou *= 0.5f;
          v->ov *= 0.5f;
        }
      }
      v->u1 = v->u0 = v->ou;
      v->v1 = v->v0 = v->ov;

      if (rdp.tex >= 1 && rdp.cur_cache[0])
      {
        if (rdp.aTBuffTex[0])
        {
          v->u0 += rdp.aTBuffTex[0]->u_shift + rdp.aTBuffTex[0]->tile_uls;
          v->v0 += rdp.aTBuffTex[0]->v_shift + rdp.aTBuffTex[0]->tile_ult;
        }

        if (rdp.tiles[rdp.cur_tile].shift_s)
        {
          if (rdp.tiles[rdp.cur_tile].shift_s > 10)
            v->u0 *= (float)(1 << (16 - rdp.tiles[rdp.cur_tile].shift_s));
          else
            v->u0 /= (float)(1 << rdp.tiles[rdp.cur_tile].shift_s);
        }
        if (rdp.tiles[rdp.cur_tile].shift_t)
        {
          if (rdp.tiles[rdp.cur_tile].shift_t > 10)
            v->v0 *= (float)(1 << (16 - rdp.tiles[rdp.cur_tile].shift_t));
          else
            v->v0 /= (float)(1 << rdp.tiles[rdp.cur_tile].shift_t);
        }

        if (rdp.aTBuffTex[0])
        {
          if (rdp.aTBuffTex[0]->tile_uls != (int)rdp.tiles[rdp.cur_tile].f_ul_s)
            v->u0 -= rdp.tiles[rdp.cur_tile].f_ul_s;
          if (rdp.aTBuffTex[0]->tile_ult != (int)rdp.tiles[rdp.cur_tile].f_ul_t || (settings.hacks&hack_Megaman))
            v->v0 -= rdp.tiles[rdp.cur_tile].f_ul_t; //required for megaman (boss special attack)
          v->u0 *= rdp.aTBuffTex[0]->u_scale;
          v->v0 *= rdp.aTBuffTex[0]->v_scale;
#ifdef EXTREME_LOGGING
          FRDP("tbuff_tex t0: (%f, %f)->(%f, %f)\n", v->ou, v->ov, v->u0, v->v0);
#endif
        }
        else
        {
          v->u0 -= rdp.tiles[rdp.cur_tile].f_ul_s;
          v->v0 -= rdp.tiles[rdp.cur_tile].f_ul_t;
          v->u0 = rdp.cur_cache[0]->c_off + rdp.cur_cache[0]->c_scl_x * v->u0;
          v->v0 = rdp.cur_cache[0]->c_off + rdp.cur_cache[0]->c_scl_y * v->v0;
        }
        v->u0_w = v->u0 / v->w;
        v->v0_w = v->v0 / v->w;
      }

      if (rdp.tex >= 2 && rdp.cur_cache[1])
      {
        if (rdp.aTBuffTex[1])
        {
          v->u1 += rdp.aTBuffTex[1]->u_shift + rdp.aTBuffTex[1]->tile_uls;
          v->v1 += rdp.aTBuffTex[1]->v_shift + rdp.aTBuffTex[1]->tile_ult;
        }
        if (rdp.tiles[rdp.cur_tile+1].shift_s)
        {
          if (rdp.tiles[rdp.cur_tile+1].shift_s > 10)
            v->u1 *= (float)(1 << (16 - rdp.tiles[rdp.cur_tile+1].shift_s));
          else
            v->u1 /= (float)(1 << rdp.tiles[rdp.cur_tile+1].shift_s);
        }
        if (rdp.tiles[rdp.cur_tile+1].shift_t)
        {
          if (rdp.tiles[rdp.cur_tile+1].shift_t > 10)
            v->v1 *= (float)(1 << (16 - rdp.tiles[rdp.cur_tile+1].shift_t));
          else
            v->v1 /= (float)(1 << rdp.tiles[rdp.cur_tile+1].shift_t);
        }

        if (rdp.aTBuffTex[1])
        {
          if (rdp.aTBuffTex[1]->tile_uls != (int)rdp.tiles[rdp.cur_tile].f_ul_s)
            v->u1 -= rdp.tiles[rdp.cur_tile].f_ul_s;
          v->u1 *= rdp.aTBuffTex[1]->u_scale;
          v->v1 *= rdp.aTBuffTex[1]->v_scale;
#ifdef EXTREME_LOGGING
          FRDP("tbuff_tex t1: (%f, %f)->(%f, %f)\n", v->ou, v->ov, v->u1, v->v1);
#endif
        }
        else
        {
          v->u1 -= rdp.tiles[rdp.cur_tile+1].f_ul_s;
          v->v1 -= rdp.tiles[rdp.cur_tile+1].f_ul_t;
          v->u1 = rdp.cur_cache[1]->c_off + rdp.cur_cache[1]->c_scl_x * v->u1;
          v->v1 = rdp.cur_cache[1]->c_off + rdp.cur_cache[1]->c_scl_y * v->v1;
        }

        v->u1_w = v->u1 / v->w;
        v->v1_w = v->v1 / v->w;
      }
      //      FRDP(" * CALCULATING VERTEX U/V: %d  u0: %f, v0: %f, u1: %f, v1: %f\n", v->number, v->u0, v->v0, v->u1, v->v1);
    }
#ifdef EXTREME_LOGGING
            FRDP("draw_tri. v[%d] ou=%f, ov = %f\n", i, v->ou, v->ov);
#endif
    if (v->shade_mod != cmb.shade_mod_hash)
      apply_shade_mods (v);
  } //for

  rdp.clip = 0;

  if ((vtx[0]->scr_off & 16) ||
    (vtx[1]->scr_off & 16) ||
    (vtx[2]->scr_off & 16))
    rdp.clip |= CLIP_WMIN;

  vtx[0]->not_zclipped = vtx[1]->not_zclipped = vtx[2]->not_zclipped = 1;

  if (rdp.cur_cache[0] && (rdp.tex & 1) && (rdp.cur_cache[0]->splits > 1) && !rdp.aTBuffTex[0] && !rdp.clip)
  {
    int index,i,j, min_256,max_256, cur_256,left_256,right_256;
    float percent;

    min_256 = min((int)vtx[0]->u0,(int)vtx[1]->u0); // bah, don't put two mins on one line
    min_256 = min(min_256,(int)vtx[2]->u0) >> 8;  // or it will be calculated twice

    max_256 = max((int)vtx[0]->u0,(int)vtx[1]->u0); // not like it makes much difference
    max_256 = max(max_256,(int)vtx[2]->u0) >> 8;  // anyway :P

    for (cur_256=min_256; cur_256<=max_256; cur_256++)
    {
      left_256 = cur_256 << 8;
      right_256 = (cur_256+1) << 8;

      // Set vertex buffers
      rdp.vtxbuf = rdp.vtx1;  // copy from v to rdp.vtx1
      rdp.vtxbuf2 = rdp.vtx2;
      rdp.vtx_buffer = 0;
      rdp.n_global = 3;
      index = 0;

      // ** Left plane **
      for (i=0; i<3; i++)
      {
        j = i+1;
        if (j == 3) j = 0;

        VERTEX *v1 = vtx[i];
        VERTEX *v2 = vtx[j];

        if (v1->u0 >= left_256)
        {
          if (v2->u0 >= left_256)   // Both are in, save the last one
          {
            rdp.vtxbuf[index] = *v2;
            rdp.vtxbuf[index].u0 -= left_256;
            rdp.vtxbuf[index++].v0 += cur_256 * rdp.cur_cache[0]->splitheight;
          }
          else      // First is in, second is out, save intersection
          {
            percent = (left_256 - v1->u0) / (v2->u0 - v1->u0);
            rdp.vtxbuf[index].x = v1->x + (v2->x - v1->x) * percent;
            rdp.vtxbuf[index].y = v1->y + (v2->y - v1->y) * percent;
            rdp.vtxbuf[index].z = v1->z + (v2->z - v1->z) * percent;
            rdp.vtxbuf[index].w = v1->w + (v2->w - v1->w) * percent;
            rdp.vtxbuf[index].f = v1->f + (v2->f - v1->f) * percent;
            rdp.vtxbuf[index].u0 = 0.5f;
            rdp.vtxbuf[index].v0 = v1->v0 + (v2->v0 - v1->v0) * percent +
              cur_256 * rdp.cur_cache[0]->splitheight;
            rdp.vtxbuf[index].u1 = v1->u1 + (v2->u1 - v1->u1) * percent;
            rdp.vtxbuf[index].v1 = v1->v1 + (v2->v1 - v1->v1) * percent;
            rdp.vtxbuf[index].b = (wxUint8)(v1->b + (v2->b - v1->b) * percent);
            rdp.vtxbuf[index].g = (wxUint8)(v1->g + (v2->g - v1->g) * percent);
            rdp.vtxbuf[index].r = (wxUint8)(v1->r + (v2->r - v1->r) * percent);
            rdp.vtxbuf[index++].a = (wxUint8)(v1->a + (v2->a - v1->a) * percent);
          }
        }
        else
        {
          //if (v2->u0 < left_256)  // Both are out, save nothing
          if (v2->u0 >= left_256) // First is out, second is in, save intersection & in point
          {
            percent = (left_256 - v2->u0) / (v1->u0 - v2->u0);
            rdp.vtxbuf[index].x = v2->x + (v1->x - v2->x) * percent;
            rdp.vtxbuf[index].y = v2->y + (v1->y - v2->y) * percent;
            rdp.vtxbuf[index].z = v2->z + (v1->z - v2->z) * percent;
            rdp.vtxbuf[index].w = v2->w + (v1->w - v2->w) * percent;
            rdp.vtxbuf[index].f = v2->f + (v1->f - v2->f) * percent;
            rdp.vtxbuf[index].u0 = 0.5f;
            rdp.vtxbuf[index].v0 = v2->v0 + (v1->v0 - v2->v0) * percent +
              cur_256 * rdp.cur_cache[0]->splitheight;
            rdp.vtxbuf[index].u1 = v2->u1 + (v1->u1 - v2->u1) * percent;
            rdp.vtxbuf[index].v1 = v2->v1 + (v1->v1 - v2->v1) * percent;
            rdp.vtxbuf[index].b = (wxUint8)(v2->b + (v1->b - v2->b) * percent);
            rdp.vtxbuf[index].g = (wxUint8)(v2->g + (v1->g - v2->g) * percent);
            rdp.vtxbuf[index].r = (wxUint8)(v2->r + (v1->r - v2->r) * percent);
            rdp.vtxbuf[index++].a = (wxUint8)(v2->a + (v1->a - v2->a) * percent);

            // Save the in point
            rdp.vtxbuf[index] = *v2;
            rdp.vtxbuf[index].u0 -= left_256;
            rdp.vtxbuf[index++].v0 += cur_256 * rdp.cur_cache[0]->splitheight;
          }
        }
      }
      rdp.n_global = index;

      rdp.vtxbuf = rdp.vtx2;  // now vtx1 holds the value, & vtx2 is the destination
      rdp.vtxbuf2 = rdp.vtx1;
      rdp.vtx_buffer ^= 1;
      index = 0;

      for (i=0; i<rdp.n_global; i++)
      {
        j = i+1;
        if (j == rdp.n_global) j = 0;

        VERTEX *v1 = &rdp.vtxbuf2[i];
        VERTEX *v2 = &rdp.vtxbuf2[j];

        // ** Right plane **
        if (v1->u0 <= right_256)
        {
          if (v2->u0 <= right_256)   // Both are in, save the last one
          {
            rdp.vtxbuf[index] = *v2;
            rdp.vtxbuf[index++].not_zclipped = 0;
          }
          else      // First is in, second is out, save intersection
          {
            percent = (right_256 - v1->u0) / (v2->u0 - v1->u0);
            rdp.vtxbuf[index].x = v1->x + (v2->x - v1->x) * percent;
            rdp.vtxbuf[index].y = v1->y + (v2->y - v1->y) * percent;
            rdp.vtxbuf[index].z = v1->z + (v2->z - v1->z) * percent;
            rdp.vtxbuf[index].w = v1->w + (v2->w - v1->w) * percent;
            rdp.vtxbuf[index].f = v1->f + (v2->f - v1->f) * percent;
            rdp.vtxbuf[index].u0 = 255.5f;
            rdp.vtxbuf[index].v0 = v1->v0 + (v2->v0 - v1->v0) * percent;
            rdp.vtxbuf[index].u1 = v1->u1 + (v2->u1 - v1->u1) * percent;
            rdp.vtxbuf[index].v1 = v1->v1 + (v2->v1 - v1->v1) * percent;
            rdp.vtxbuf[index].b = (wxUint8)(v1->b + (v2->b - v1->b) * percent);
            rdp.vtxbuf[index].g = (wxUint8)(v1->g + (v2->g - v1->g) * percent);
            rdp.vtxbuf[index].r = (wxUint8)(v1->r + (v2->r - v1->r) * percent);
            rdp.vtxbuf[index].a = (wxUint8)(v1->a + (v2->a - v1->a) * percent);
            rdp.vtxbuf[index++].not_zclipped = 0;
          }
        }
        else
        {
          //if (v2->u0 > 256.0f)  // Both are out, save nothing
          if (v2->u0 <= right_256) // First is out, second is in, save intersection & in point
          {
            percent = (right_256 - v2->u0) / (v1->u0 - v2->u0);
            rdp.vtxbuf[index].x = v2->x + (v1->x - v2->x) * percent;
            rdp.vtxbuf[index].y = v2->y + (v1->y - v2->y) * percent;
            rdp.vtxbuf[index].z = v2->z + (v1->z - v2->z) * percent;
            rdp.vtxbuf[index].w = v2->w + (v1->w - v2->w) * percent;
            rdp.vtxbuf[index].f = v2->f + (v1->f - v2->f) * percent;
            rdp.vtxbuf[index].u0 = 255.5f;
            rdp.vtxbuf[index].v0 = v2->v0 + (v1->v0 - v2->v0) * percent;
            rdp.vtxbuf[index].u1 = v2->u1 + (v1->u1 - v2->u1) * percent;
            rdp.vtxbuf[index].v1 = v2->v1 + (v1->v1 - v2->v1) * percent;
            rdp.vtxbuf[index].b = (wxUint8)(v2->b + (v1->b - v2->b) * percent);
            rdp.vtxbuf[index].g = (wxUint8)(v2->g + (v1->g - v2->g) * percent);
            rdp.vtxbuf[index].r = (wxUint8)(v2->r + (v1->r - v2->r) * percent);
            rdp.vtxbuf[index].a = (wxUint8)(v2->a + (v1->a - v2->a) * percent);
            rdp.vtxbuf[index++].not_zclipped = 0;

            // Save the in point
            rdp.vtxbuf[index] = *v2;
            rdp.vtxbuf[index++].not_zclipped = 0;
          }
        }
      }
      rdp.n_global = index;

      do_triangle_stuff (linew, TRUE);
    }
  }
  else
  {
    // Set vertex buffers
    rdp.vtxbuf = rdp.vtx1;  // copy from v to rdp.vtx1
    rdp.vtxbuf2 = rdp.vtx2;
    rdp.vtx_buffer = 0;
    rdp.n_global = 3;

    rdp.vtxbuf[0] = *vtx[0];
    rdp.vtxbuf[0].number = 1;
    rdp.vtxbuf[1] = *vtx[1];
    rdp.vtxbuf[1].number = 2;
    rdp.vtxbuf[2] = *vtx[2];
    rdp.vtxbuf[2].number = 4;

    do_triangle_stuff (linew, FALSE);
  }
}

#define interp2p(a, b, r)  (a + (b - a) * r)

//*
static void InterpolateColors(VERTEX & va, VERTEX & vb, VERTEX & res, float percent)
{
  res.b = (wxUint8)interp2p(va.b, vb.b, percent);
  res.g = (wxUint8)interp2p(va.g, vb.g, percent);;
  res.r = (wxUint8)interp2p(va.r, vb.r, percent);;
  res.a = (wxUint8)interp2p(va.a, vb.a, percent);;
  res.f = interp2p(va.f, vb.f, percent);;
}
//*/
//
// clip_w - clips aint the z-axis
//
static void clip_w (int interpolate_colors)
{
  int i,j,index,n=rdp.n_global;
  float percent;
  // Swap vertex buffers
  VERTEX *tmp = rdp.vtxbuf2;
  rdp.vtxbuf2 = rdp.vtxbuf;
  rdp.vtxbuf = tmp;
  rdp.vtx_buffer ^= 1;
  index = 0;

  // Check the vertices for clipping
  for (i=0; i<n; i++)
  {
    j = i+1;
    if (j == 3) j = 0;

    if (Vi.w >= 0.01f)
    {
      if (Vj.w >= 0.01f)    // Both are in, save the last one
      {
        rdp.vtxbuf[index] = Vj;
        rdp.vtxbuf[index++].not_zclipped = 1;
      }
      else      // First is in, second is out, save intersection
      {
        percent = (-Vi.w) / (Vj.w - Vi.w);
        rdp.vtxbuf[index].not_zclipped = 0;
        rdp.vtxbuf[index].x = Vi.x + (Vj.x - Vi.x) * percent;
        rdp.vtxbuf[index].y = Vi.y + (Vj.y - Vi.y) * percent;
        rdp.vtxbuf[index].z = Vi.z + (Vj.z - Vi.z) * percent;
        rdp.vtxbuf[index].w = 0.01f;
        rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
        rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
        rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
        rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
        if (interpolate_colors)
          InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
        else
          rdp.vtxbuf[index++].number = Vi.number | Vj.number;
      }
    }
    else
    {
      //if (Vj.w < 0.01f) // Both are out, save nothing
      if (Vj.w >= 0.01f)  // First is out, second is in, save intersection & in point
      {
        percent = (-Vj.w) / (Vi.w - Vj.w);
        rdp.vtxbuf[index].not_zclipped = 0;
        rdp.vtxbuf[index].x = Vj.x + (Vi.x - Vj.x) * percent;
        rdp.vtxbuf[index].y = Vj.y + (Vi.y - Vj.y) * percent;
        rdp.vtxbuf[index].z = Vj.z + (Vi.z - Vj.z) * percent;
        rdp.vtxbuf[index].w = 0.01f;
        rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
        rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
        rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
        rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
        if (interpolate_colors)
          InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
        else
          rdp.vtxbuf[index++].number = Vi.number | Vj.number;

        // Save the in point
        rdp.vtxbuf[index] = Vj;
        rdp.vtxbuf[index++].not_zclipped = 1;
      }
    }
  }
  rdp.n_global = index;
}

static void render_tri (wxUint16 linew, int old_interpolate);

void do_triangle_stuff (wxUint16 linew, int old_interpolate) // what else?? do the triangle stuff :P (to keep from writing code twice)
{
  int i;

  if (rdp.clip & CLIP_WMIN)
    clip_w (old_interpolate);

  float maxZ = (rdp.zsrc != 1) ? rdp.view_trans[2] + rdp.view_scale[2] : rdp.prim_depth;

  wxUint8 no_clip = 2;
  for (i=0; i<rdp.n_global; i++)
  {
    if (rdp.vtxbuf[i].not_zclipped)// && rdp.zsrc != 1)
    {
#ifdef EXTREME_LOGGING
      FRDP (" * NOT ZCLIPPPED: %d\n", rdp.vtxbuf[i].number);
#endif
      rdp.vtxbuf[i].x = rdp.vtxbuf[i].sx;
      rdp.vtxbuf[i].y = rdp.vtxbuf[i].sy;
      rdp.vtxbuf[i].z = rdp.vtxbuf[i].sz;
      rdp.vtxbuf[i].q = rdp.vtxbuf[i].oow;
      rdp.vtxbuf[i].u0 = rdp.vtxbuf[i].u0_w;
      rdp.vtxbuf[i].v0 = rdp.vtxbuf[i].v0_w;
      rdp.vtxbuf[i].u1 = rdp.vtxbuf[i].u1_w;
      rdp.vtxbuf[i].v1 = rdp.vtxbuf[i].v1_w;
    }
    else
    {
#ifdef EXTREME_LOGGING
      FRDP (" * ZCLIPPED: %d\n", rdp.vtxbuf[i].number);
#endif
      rdp.vtxbuf[i].q = 1.0f / rdp.vtxbuf[i].w;
      rdp.vtxbuf[i].x = rdp.view_trans[0] + rdp.vtxbuf[i].x * rdp.vtxbuf[i].q * rdp.view_scale[0] + rdp.offset_x;
      rdp.vtxbuf[i].y = rdp.view_trans[1] + rdp.vtxbuf[i].y * rdp.vtxbuf[i].q * rdp.view_scale[1] + rdp.offset_y;
      rdp.vtxbuf[i].z = rdp.view_trans[2] + rdp.vtxbuf[i].z * rdp.vtxbuf[i].q * rdp.view_scale[2];
      if (rdp.tex >= 1)
      {
        rdp.vtxbuf[i].u0 *= rdp.vtxbuf[i].q;
        rdp.vtxbuf[i].v0 *= rdp.vtxbuf[i].q;
      }
      if (rdp.tex >= 2)
      {
        rdp.vtxbuf[i].u1 *= rdp.vtxbuf[i].q;
        rdp.vtxbuf[i].v1 *= rdp.vtxbuf[i].q;
      }
    }

    if (rdp.zsrc == 1)
      rdp.vtxbuf[i].z = rdp.prim_depth;

    // Don't remove clipping, or it will freeze
    if (rdp.vtxbuf[i].x > rdp.clip_max_x) rdp.clip |= CLIP_XMAX;
    if (rdp.vtxbuf[i].x < rdp.clip_min_x) rdp.clip |= CLIP_XMIN;
    if (rdp.vtxbuf[i].y > rdp.clip_max_y) rdp.clip |= CLIP_YMAX;
    if (rdp.vtxbuf[i].y < rdp.clip_min_y) rdp.clip |= CLIP_YMIN;
    if (rdp.vtxbuf[i].z > maxZ)           rdp.clip |= CLIP_ZMAX;
    if (rdp.vtxbuf[i].z < 0.0f)           rdp.clip |= CLIP_ZMIN;
    no_clip &= rdp.vtxbuf[i].screen_translated;
  }
  if (no_clip)
    rdp.clip = 0;
  else
  {
    if (!settings.clip_zmin)
      rdp.clip &= ~CLIP_ZMIN;
    if (!settings.clip_zmax)
      rdp.clip &= ~CLIP_ZMAX;
  }
  render_tri (linew, old_interpolate);
}

void do_triangle_stuff_2 (wxUint16 linew)
{
  rdp.clip = 0;

  for (int i=0; i<rdp.n_global; i++)
  {
    // Don't remove clipping, or it will freeze
    if (rdp.vtxbuf[i].x > rdp.clip_max_x) rdp.clip |= CLIP_XMAX;
    if (rdp.vtxbuf[i].x < rdp.clip_min_x) rdp.clip |= CLIP_XMIN;
    if (rdp.vtxbuf[i].y > rdp.clip_max_y) rdp.clip |= CLIP_YMAX;
    if (rdp.vtxbuf[i].y < rdp.clip_min_y) rdp.clip |= CLIP_YMIN;
  }

  render_tri (linew, TRUE);
}

__inline wxUint8 real_to_char(double x)
{
  return (wxUint8)(((int)floor(x+0.5))&0xFF);
}

//*
static void InterpolateColors2(VERTEX & va, VERTEX & vb, VERTEX & res, float percent)
{
  float w = 1.0f/(va.oow + (vb.oow-va.oow) * percent);
  //   res.oow = va.oow + (vb.oow-va.oow) * percent;
  //   res.q = res.oow;
  float ba = va.b * va.oow;
  float bb = vb.b * vb.oow;
  res.b = real_to_char(interp2p(ba, bb, percent) * w);
  float ga = va.g * va.oow;
  float gb = vb.g * vb.oow;
  res.g = real_to_char(interp2p(ga, gb, percent) * w);
  float ra = va.r * va.oow;
  float rb = vb.r * vb.oow;
  res.r = real_to_char(interp2p(ra, rb, percent) * w);
  float aa = va.a * va.oow;
  float ab = vb.a * vb.oow;
  res.a = real_to_char(interp2p(aa, ab, percent) * w);
  float fa = va.f * va.oow;
  float fb = vb.f * vb.oow;
  res.f = interp2p(fa, fb, percent) * w;
  /*
  float u0a = va.u0_w * va.oow;
  float u0b = vb.u0_w * vb.oow;
  res.u0 = (u0a + (u0b - u0a) * percent) * w;
  float v0a = va.v0_w * va.oow;
  float v0b = vb.v0_w * vb.oow;
  res.v0 = (v0a + (v0b - v0a) * percent) * w;
  float u1a = va.u1_w * va.oow;
  float u1b = vb.u1_w * vb.oow;
  res.u1 = (u1a + (u1b - u1a) * percent) * w;
  float v1a = va.v1_w * va.oow;
  float v1b = vb.v1_w * vb.oow;
  res.v1 = (v1a + (v1b - v1a) * percent) * w;
  */
}
//*/

typedef struct {
  double d;
  double x;
  double y;
} LineEuqationType;

static double EvaLine(LineEuqationType &li, double x, double y)
{
  return li.x*x+li.y*y+li.d;
}

static void Create1LineEq(LineEuqationType &l, VERTEX &v1, VERTEX &v2, VERTEX &v3)
{
  // Line between (x1,y1) to (x2,y2)
  l.x = v2.sy-v1.sy;
  l.y = v1.sx-v2.sx;
  l.d = -(l.x*v2.sx+(l.y)*v2.sy);
  if (EvaLine(l,v3.sx,v3.sy)*v3.oow < 0)
  {
    l.x = -l.x;
    l.y = -l.y;
    l.d = -l.d;
  }
}


__inline double interp3p(float a, float b, float c, double r1, double r2)
{
  return (a)+(((b)+((c)-(b))*(r2))-(a))*(r1);
}
/*
#define interp3p(a, b, c, r1, r2) \
  (a+(((b)+((c)-(b))*(r2))-(a))*(r1))
*/

static void InterpolateColors3(VERTEX &v1, VERTEX &v2, VERTEX &v3, VERTEX &out)
{

  LineEuqationType line;
  Create1LineEq(line, v2, v3, v1);

  double aDot = (out.x*line.x + out.y*line.y);
  double bDot = (v1.sx*line.x + v1.sy*line.y);

  double scale1 = ( - line.d - aDot) / ( bDot - aDot );

  double tx = out.x + scale1 * (v1.sx - out.x);
  double ty = out.y + scale1 * (v1.sy - out.y);

  double s1 = 101.0, s2 = 101.0;
  double den = tx - v1.sx;
  if (fabs(den) > 1.0)
    s1 = (out.x-v1.sx)/den;
  if (s1 > 100.0f)
    s1 = (out.y-v1.sy)/(ty-v1.sy);

  den = v3.sx - v2.sx;
  if (fabs(den) > 1.0)
    s2 = (tx-v2.sx)/den;
  if (s2 > 100.0f)
    s2 =(ty-v2.sy)/(v3.sy-v2.sy);

  double w = 1.0/interp3p(v1.oow,v2.oow,v3.oow,s1,s2);

  out.r = real_to_char(interp3p(v1.r*v1.oow,v2.r*v2.oow,v3.r*v3.oow,s1,s2)*w);
  out.g = real_to_char(interp3p(v1.g*v1.oow,v2.g*v2.oow,v3.g*v3.oow,s1,s2)*w);
  out.b = real_to_char(interp3p(v1.b*v1.oow,v2.b*v2.oow,v3.b*v3.oow,s1,s2)*w);
  out.a = real_to_char(interp3p(v1.a*v1.oow,v2.a*v2.oow,v3.a*v3.oow,s1,s2)*w);
  out.f = (float)(interp3p(v1.f*v1.oow,v2.f*v2.oow,v3.f*v3.oow,s1,s2)*w);
  /*
  out.u0 = interp3p(v1.u0_w*v1.oow,v2.u0_w*v2.oow,v3.u0_w*v3.oow,s1,s2)/oow;
  out.v0 = interp3p(v1.v0_w*v1.oow,v2.v0_w*v2.oow,v3.v0_w*v3.oow,s1,s2)/oow;
  out.u1 = interp3p(v1.u1_w*v1.oow,v2.u1_w*v2.oow,v3.u1_w*v3.oow,s1,s2)/oow;
  out.v1 = interp3p(v1.v1_w*v1.oow,v2.v1_w*v2.oow,v3.v1_w*v3.oow,s1,s2)/oow;
  */
}

static void CalculateLOD(VERTEX *v, int n)
{
  //rdp.update |= UPDATE_TEXTURE;
  /*
  if (rdp.lod_calculated)
  {
  float detailmax;
  if (dc0_detailmax < 0.5)
  detailmax = rdp.lod_fraction;
  else
  detailmax = 1.0f - rdp.lod_fraction;
  grTexDetailControl (GR_TMU0, dc0_lodbias, dc0_detailscale, detailmax);
  if (num_tmu == 2)
  grTexDetailControl (GR_TMU1, dc1_lodbias, dc1_detailscale, detailmax);
  return;
  }
  */
  float deltaS, deltaT;
  float deltaX, deltaY;
  double deltaTexels, deltaPixels, lodFactor = 0;
  double intptr;
  float s_scale = rdp.tiles[rdp.cur_tile].width / 255.0f;
  float t_scale = rdp.tiles[rdp.cur_tile].height / 255.0f;
  if (settings.lodmode == 1)
  {
    deltaS = (v[1].u0/v[1].q - v[0].u0/v[0].q) * s_scale;
    deltaT = (v[1].v0/v[1].q - v[0].v0/v[0].q) * t_scale;
    deltaTexels = sqrt( deltaS * deltaS + deltaT * deltaT );

    deltaX = (v[1].x - v[0].x)/rdp.scale_x;
    deltaY = (v[1].y - v[0].y)/rdp.scale_y;
    deltaPixels = sqrt( deltaX * deltaX + deltaY * deltaY );

    lodFactor = deltaTexels / deltaPixels;
  }
  else
  {
    int i, j;
    for (i = 0; i < n; i++)
    {
      j = (i < n-1) ? i + 1 : 0;

      deltaS = (v[j].u0/v[j].q - v[i].u0/v[i].q) * s_scale;
      deltaT = (v[j].v0/v[j].q - v[i].v0/v[i].q) * t_scale;
      //    deltaS = v[j].ou - v[i].ou;
      //    deltaT = v[j].ov - v[i].ov;
      deltaTexels = sqrt( deltaS * deltaS + deltaT * deltaT );

      deltaX = (v[j].x - v[i].x)/rdp.scale_x;
      deltaY = (v[j].y - v[i].y)/rdp.scale_y;
      deltaPixels = sqrt( deltaX * deltaX + deltaY * deltaY );

      lodFactor += deltaTexels / deltaPixels;
    }
    // Divide by n (n edges) to find average
    lodFactor = lodFactor / n;
  }
  int ilod = (int)lodFactor;
  int lod_tile = min((int)(log10f((float)ilod)/log10f(2.0f)), rdp.cur_tile + rdp.mipmap_level);
  float lod_fraction = 1.0f;
  if (lod_tile < rdp.cur_tile + rdp.mipmap_level)
  {
  	lod_fraction = max((float)modf(lodFactor / pow(2.,lod_tile),&intptr), rdp.prim_lodmin / 255.0f);
  }
  float detailmax;
  if (cmb.dc0_detailmax < 0.5f)
    detailmax = lod_fraction;
  else
    detailmax = 1.0f - lod_fraction;
  grTexDetailControl (GR_TMU0, cmb.dc0_lodbias, cmb.dc0_detailscale, detailmax);
  if (voodoo.num_tmu == 2)
    grTexDetailControl (GR_TMU1, cmb.dc1_lodbias, cmb.dc1_detailscale, detailmax);
  FRDP("CalculateLOD factor: %f, tile: %d, lod_fraction: %f\n", (float)lodFactor, lod_tile, lod_fraction);
}

float ScaleZ(float z)
{
  if (settings.n64_z_scale)
  {
    int iz = (int)(z*8.0f+0.5f);
    if (iz < 0) iz = 0;
    else if (iz >= 0x40000) iz = 0x40000 - 1;
    return (float)zLUT[iz];
  }
  if (z  < 0.0f) return 0.0f;
  z *= 1.9f;
  if (z > 65534.0f) return 65534.0f;
  return z;
}

static void DepthBuffer(VERTEX * vtx, int n)
{
  if (fb_depth_render_enabled && !(settings.hacks&hack_RE2) && dzdx && (rdp.flags & ZBUF_UPDATE))
  {
    vertexi v[12];
    if (u_cull_mode == 1) //cull front
    {
      for(int i=0; i<n; i++)
      {
        v[i].x = (int)((vtx[n-i-1].x-rdp.offset_x) / rdp.scale_x * 65536.0);
        v[i].y = (int)((vtx[n-i-1].y-rdp.offset_y) / rdp.scale_y * 65536.0);
        v[i].z = (int)(vtx[n-i-1].z * 65536.0);
      }
    }
    else
    {
      for(int i=0; i<n; i++)
      {
        v[i].x = (int)((vtx[i].x-rdp.offset_x) / rdp.scale_x * 65536.0);
        v[i].y = (int)((vtx[i].y-rdp.offset_y) / rdp.scale_y * 65536.0);
        v[i].z = (int)(vtx[i].z * 65536.0);
      }
    }
    Rasterize(v, n, dzdx);
  }
  for(int i=0; i<n; i++)
    vtx[i].z = ScaleZ(vtx[i].z);
}

/*
std::ofstream loga;
#define LOGG(x) loga.open("glide_log.txt",std::ios::app); loga << x; loga.flush(); loga.close();
__inline void FRDP2(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsprintf(out_buf, fmt, ap);
LOGG(out_buf);
va_end(ap);
}
//*/
//#define LOGG(x)
//#define FRDP2(x)


void clip_tri(int interpolate_colors)
{
  int i,j,index,n=rdp.n_global;
  float percent;

  // Check which clipping is needed
  if (rdp.clip & CLIP_XMAX) // right of the screen
  {
    // Swap vertex buffers
    VERTEX *tmp = rdp.vtxbuf2;
    rdp.vtxbuf2 = rdp.vtxbuf;
    rdp.vtxbuf = tmp;
    rdp.vtx_buffer ^= 1;
    index = 0;

    // Check the vertices for clipping
    for (i=0; i<n; i++)
    {
      j = i+1;
      if (j == n) j = 0;

      if (Vi.x <= rdp.clip_max_x)
      {
        if (Vj.x <= rdp.clip_max_x)   // Both are in, save the last one
        {
          rdp.vtxbuf[index++] = Vj;
        }
        else      // First is in, second is out, save intersection
        {
          percent = (rdp.clip_max_x - Vi.x) / (Vj.x - Vi.x);
          rdp.vtxbuf[index].x = rdp.clip_max_x;
          rdp.vtxbuf[index].y = Vi.y + (Vj.y - Vi.y) * percent;
          rdp.vtxbuf[index].z = Vi.z + (Vj.z - Vi.z) * percent;
          rdp.vtxbuf[index].q = Vi.q + (Vj.q - Vi.q) * percent;
          rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
          rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
          rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
          rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 8;
        }
      }
      else
      {
        //if (Vj.x > rdp.clip_max_x)  // Both are out, save nothing
        if (Vj.x <= rdp.clip_max_x) // First is out, second is in, save intersection & in point
        {
          percent = (rdp.clip_max_x - Vj.x) / (Vi.x - Vj.x);
          rdp.vtxbuf[index].x = rdp.clip_max_x;
          rdp.vtxbuf[index].y = Vj.y + (Vi.y - Vj.y) * percent;
          rdp.vtxbuf[index].z = Vj.z + (Vi.z - Vj.z) * percent;
          rdp.vtxbuf[index].q = Vj.q + (Vi.q - Vj.q) * percent;
          rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
          rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
          rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
          rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 8;

          // Save the in point
          rdp.vtxbuf[index++] = Vj;
        }
      }
    }
    n = index;
  }
  if (rdp.clip & CLIP_XMIN) // left of the screen
  {
    // Swap vertex buffers
    VERTEX *tmp = rdp.vtxbuf2;
    rdp.vtxbuf2 = rdp.vtxbuf;
    rdp.vtxbuf = tmp;
    rdp.vtx_buffer ^= 1;
    index = 0;

    // Check the vertices for clipping
    for (i=0; i<n; i++)
    {
      j = i+1;
      if (j == n) j = 0;

      if (Vi.x >= rdp.clip_min_x)
      {
        if (Vj.x >= rdp.clip_min_x)   // Both are in, save the last one
        {
          rdp.vtxbuf[index++] = Vj;
        }
        else      // First is in, second is out, save intersection
        {
          percent = (rdp.clip_min_x - Vi.x) / (Vj.x - Vi.x);
          rdp.vtxbuf[index].x = rdp.clip_min_x;
          rdp.vtxbuf[index].y = Vi.y + (Vj.y - Vi.y) * percent;
          rdp.vtxbuf[index].z = Vi.z + (Vj.z - Vi.z) * percent;
          rdp.vtxbuf[index].q = Vi.q + (Vj.q - Vi.q) * percent;
          rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
          rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
          rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
          rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 8;
        }
      }
      else
      {
        //if (Vj.x < rdp.clip_min_x)  // Both are out, save nothing
        if (Vj.x >= rdp.clip_min_x) // First is out, second is in, save intersection & in point
        {
          percent = (rdp.clip_min_x - Vj.x) / (Vi.x - Vj.x);
          rdp.vtxbuf[index].x = rdp.clip_min_x;
          rdp.vtxbuf[index].y = Vj.y + (Vi.y - Vj.y) * percent;
          rdp.vtxbuf[index].z = Vj.z + (Vi.z - Vj.z) * percent;
          rdp.vtxbuf[index].q = Vj.q + (Vi.q - Vj.q) * percent;
          rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
          rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
          rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
          rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 8;

          // Save the in point
          rdp.vtxbuf[index++] = Vj;
        }
      }
    }
    n = index;
  }
  if (rdp.clip & CLIP_YMAX) // top of the screen
  {
    // Swap vertex buffers
    VERTEX *tmp = rdp.vtxbuf2;
    rdp.vtxbuf2 = rdp.vtxbuf;
    rdp.vtxbuf = tmp;
    rdp.vtx_buffer ^= 1;
    index = 0;

    // Check the vertices for clipping
    for (i=0; i<n; i++)
    {
      j = i+1;
      if (j == n) j = 0;

      if (Vi.y <= rdp.clip_max_y)
      {
        if (Vj.y <= rdp.clip_max_y)   // Both are in, save the last one
        {
          rdp.vtxbuf[index++] = Vj;
        }
        else      // First is in, second is out, save intersection
        {
          percent = (rdp.clip_max_y - Vi.y) / (Vj.y - Vi.y);
          rdp.vtxbuf[index].x = Vi.x + (Vj.x - Vi.x) * percent;
          rdp.vtxbuf[index].y = rdp.clip_max_y;
          rdp.vtxbuf[index].z = Vi.z + (Vj.z - Vi.z) * percent;
          rdp.vtxbuf[index].q = Vi.q + (Vj.q - Vi.q) * percent;
          rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
          rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
          rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
          rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 16;
        }
      }
      else
      {
        //if (Vj.y > rdp.clip_max_y)  // Both are out, save nothing
        if (Vj.y <= rdp.clip_max_y) // First is out, second is in, save intersection & in point
        {
          percent = (rdp.clip_max_y - Vj.y) / (Vi.y - Vj.y);
          rdp.vtxbuf[index].x = Vj.x + (Vi.x - Vj.x) * percent;
          rdp.vtxbuf[index].y = rdp.clip_max_y;
          rdp.vtxbuf[index].z = Vj.z + (Vi.z - Vj.z) * percent;
          rdp.vtxbuf[index].q = Vj.q + (Vi.q - Vj.q) * percent;
          rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
          rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
          rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
          rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 16;

          // Save the in point
          rdp.vtxbuf[index++] = Vj;
        }
      }
    }
    n = index;
  }
  if (rdp.clip & CLIP_YMIN) // bottom of the screen
  {
    // Swap vertex buffers
    VERTEX *tmp = rdp.vtxbuf2;
    rdp.vtxbuf2 = rdp.vtxbuf;
    rdp.vtxbuf = tmp;
    rdp.vtx_buffer ^= 1;
    index = 0;

    // Check the vertices for clipping
    for (i=0; i<n; i++)
    {
      j = i+1;
      if (j == n) j = 0;

      if (Vi.y >= rdp.clip_min_y)
      {
        if (Vj.y >= rdp.clip_min_y)   // Both are in, save the last one
        {
          rdp.vtxbuf[index++] = Vj;
        }
        else      // First is in, second is out, save intersection
        {
          percent = (rdp.clip_min_y - Vi.y) / (Vj.y - Vi.y);
          rdp.vtxbuf[index].x = Vi.x + (Vj.x - Vi.x) * percent;
          rdp.vtxbuf[index].y = rdp.clip_min_y;
          rdp.vtxbuf[index].z = Vi.z + (Vj.z - Vi.z) * percent;
          rdp.vtxbuf[index].q = Vi.q + (Vj.q - Vi.q) * percent;
          rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
          rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
          rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
          rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 16;
        }
      }
      else
      {
        //if (Vj.y < rdp.clip_min_y)  // Both are out, save nothing
        if (Vj.y >= rdp.clip_min_y) // First is out, second is in, save intersection & in point
        {
          percent = (rdp.clip_min_y - Vj.y) / (Vi.y - Vj.y);
          rdp.vtxbuf[index].x = Vj.x + (Vi.x - Vj.x) * percent;
          rdp.vtxbuf[index].y = rdp.clip_min_y;
          rdp.vtxbuf[index].z = Vj.z + (Vi.z - Vj.z) * percent;
          rdp.vtxbuf[index].q = Vj.q + (Vi.q - Vj.q) * percent;
          rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
          rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
          rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
          rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number | 16;

          // Save the in point
          rdp.vtxbuf[index++] = Vj;
        }
      }
    }
    n = index;
  }
  if (rdp.clip & CLIP_ZMAX) // far plane
  {
    // Swap vertex buffers
    VERTEX *tmp = rdp.vtxbuf2;
    rdp.vtxbuf2 = rdp.vtxbuf;
    rdp.vtxbuf = tmp;
    rdp.vtx_buffer ^= 1;
    index = 0;
    float maxZ = rdp.view_trans[2] + rdp.view_scale[2];

    // Check the vertices for clipping
    for (i=0; i<n; i++)
    {
      j = i+1;
      if (j == n) j = 0;

      if (Vi.z < maxZ)
      {
        if (Vj.z < maxZ)   // Both are in, save the last one
        {
          rdp.vtxbuf[index++] = Vj;
        }
        else      // First is in, second is out, save intersection
        {
          percent = (maxZ - Vi.z) / (Vj.z - Vi.z);
          rdp.vtxbuf[index].x = Vi.x + (Vj.x - Vi.x) * percent;
          rdp.vtxbuf[index].y = Vi.y + (Vj.y - Vi.y) * percent;
          rdp.vtxbuf[index].z = maxZ - 0.001f;
          rdp.vtxbuf[index].q = Vi.q + (Vj.q - Vi.q) * percent;
          rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
          rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
          rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
          rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number;
        }
      }
      else
      {
        //if (Vj.z > maxZ)  // Both are out, save nothing
        if (Vj.z < maxZ) // First is out, second is in, save intersection & in point
        {
          percent = (maxZ - Vj.z) / (Vi.z - Vj.z);
          rdp.vtxbuf[index].x = Vj.x + (Vi.x - Vj.x) * percent;
          rdp.vtxbuf[index].y = Vj.y + (Vi.y - Vj.y) * percent;
          rdp.vtxbuf[index].z = maxZ - 0.001f;;
          rdp.vtxbuf[index].q = Vj.q + (Vi.q - Vj.q) * percent;
          rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
          rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
          rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
          rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number;

          // Save the in point
          rdp.vtxbuf[index++] = Vj;
        }
      }
    }
    n = index;
  }
/*
  if (rdp.clip & CLIP_ZMIN) // near Z
  {
    // Swap vertex buffers
    VERTEX *tmp = rdp.vtxbuf2;
    rdp.vtxbuf2 = rdp.vtxbuf;
    rdp.vtxbuf = tmp;
    rdp.vtx_buffer ^= 1;
    index = 0;

    // Check the vertices for clipping
    for (i=0; i<n; i++)
    {
      j = i+1;
      if (j == n) j = 0;

      if (Vi.z >= 0.0f)
      {
        if (Vj.z >= 0.0f)   // Both are in, save the last one
        {
          rdp.vtxbuf[index++] = Vj;
        }
        else      // First is in, second is out, save intersection
        {
          percent = (-Vi.z) / (Vj.z - Vi.z);
          rdp.vtxbuf[index].x = Vi.x + (Vj.x - Vi.x) * percent;
          rdp.vtxbuf[index].y = Vi.y + (Vj.y - Vi.y) * percent;
          rdp.vtxbuf[index].z = 0.0f;
          rdp.vtxbuf[index].q = Vi.q + (Vj.q - Vi.q) * percent;
          rdp.vtxbuf[index].u0 = Vi.u0 + (Vj.u0 - Vi.u0) * percent;
          rdp.vtxbuf[index].v0 = Vi.v0 + (Vj.v0 - Vi.v0) * percent;
          rdp.vtxbuf[index].u1 = Vi.u1 + (Vj.u1 - Vi.u1) * percent;
          rdp.vtxbuf[index].v1 = Vi.v1 + (Vj.v1 - Vi.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vi, Vj, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number;
        }
      }
      else
      {
        //if (Vj.z < 0.0f)  // Both are out, save nothing
        if (Vj.z >= 0.0f) // First is out, second is in, save intersection & in point
        {
          percent = (-Vj.z) / (Vi.z - Vj.z);
          rdp.vtxbuf[index].x = Vj.x + (Vi.x - Vj.x) * percent;
          rdp.vtxbuf[index].y = Vj.y + (Vi.y - Vj.y) * percent;
          rdp.vtxbuf[index].z = 0.0f;;
          rdp.vtxbuf[index].q = Vj.q + (Vi.q - Vj.q) * percent;
          rdp.vtxbuf[index].u0 = Vj.u0 + (Vi.u0 - Vj.u0) * percent;
          rdp.vtxbuf[index].v0 = Vj.v0 + (Vi.v0 - Vj.v0) * percent;
          rdp.vtxbuf[index].u1 = Vj.u1 + (Vi.u1 - Vj.u1) * percent;
          rdp.vtxbuf[index].v1 = Vj.v1 + (Vi.v1 - Vj.v1) * percent;
          if (interpolate_colors)
            InterpolateColors(Vj, Vi, rdp.vtxbuf[index++], percent);
          else
            rdp.vtxbuf[index++].number = Vi.number | Vj.number;

          // Save the in point
          rdp.vtxbuf[index++] = Vj;
        }
      }
    }
    n = index;
  }
*/
  rdp.n_global = n;
}

static void render_tri (wxUint16 linew, int old_interpolate)
{
  if (rdp.clip)
    clip_tri(old_interpolate);
  int n = rdp.n_global;
  if (n < 3)
  {
    FRDP (" * render_tri: n < 3\n");
    return;
  }
  int i,j;
  //*
  if ((rdp.clip & CLIP_ZMIN) && (rdp.othermode_l & 0x00000030))
  {

    int to_render = FALSE;
    for (i = 0; i < n; i++)
    {
      if (rdp.vtxbuf[i].z >= 0.0f)
      {
        to_render = TRUE;
        break;
      }
    }
    if (!to_render) //all z < 0
    {
      FRDP (" * render_tri: all z < 0\n");
      return;
    }
  }
  //*/
  if (rdp.clip && !old_interpolate)
  {
    for (i = 0; i < n; i++)
    {
      float percent = 101.0f;
      VERTEX * v1 = 0,  * v2 = 0;
      switch (rdp.vtxbuf[i].number&7)
      {
      case 1:
      case 2:
      case 4:
        continue;
        break;
      case 3:
        v1 = org_vtx[0];
        v2 = org_vtx[1];
        break;
      case 5:
        v1 = org_vtx[0];
        v2 = org_vtx[2];
        break;
      case 6:
        v1 = org_vtx[1];
        v2 = org_vtx[2];
        break;
      case 7:
        InterpolateColors3(*org_vtx[0], *org_vtx[1], *org_vtx[2], rdp.vtxbuf[i]);
        continue;
        break;
      }
      switch (rdp.vtxbuf[i].number&24)
      {
      case 8:
        percent = (rdp.vtxbuf[i].x-v1->sx)/(v2->sx-v1->sx);
        break;
      case 16:
        percent = (rdp.vtxbuf[i].y-v1->sy)/(v2->sy-v1->sy);
        break;
      default:
        {
          float d = (v2->sx-v1->sx);
          if (fabs(d) > 1.0)
            percent = (rdp.vtxbuf[i].x-v1->sx)/d;
          if (percent > 100.0f)
            percent = (rdp.vtxbuf[i].y-v1->sy)/(v2->sy-v1->sy);
        }
      }
      InterpolateColors2(*v1, *v2, rdp.vtxbuf[i], percent);
    }
  }
  /*
  if (rdp.clip)
  {
  LOGG("Colors before clipping:\n");
  unsigned int k;
		for(k=0; k<3; k++)
    {
		  FRDP2("V%d: r=%d, g=%d, b=%d, a=%d, f=%d\n", k, org_vtx[k]->r, org_vtx[k]->g, org_vtx[k]->b, org_vtx[k]->a, (short)org_vtx[k]->f);
      }
      FRDP("Got %d vertex after clipping\n", n);
      for(k=0; k<n; k++)
      {
      FRDP("V%d: r=%d, g=%d, b=%d, a=%d, f=%d\n", k, rdp.vtxbuf[k].r, rdp.vtxbuf[k].g, rdp.vtxbuf[k].b, rdp.vtxbuf[k].a, (short)rdp.vtxbuf[k].f);
      }
      }
  */

  ConvertCoordsConvert (rdp.vtxbuf, n);
  if (rdp.fog_mode == RDP::fog_enabled)
  {
    for (i = 0; i < n; i++)
    {
      rdp.vtxbuf[i].f = 1.0f/max(4.0f, rdp.vtxbuf[i].f);
    }
  }
  else if (rdp.fog_mode == RDP::fog_blend)
  {
    float fog = 1.0f/max(1, rdp.fog_color&0xFF);
    for (i = 0; i < n; i++)
    {
      rdp.vtxbuf[i].f = fog;
    }
  }
  else if (rdp.fog_mode == RDP::fog_blend_inverse)
  {
    float fog = 1.0f/max(1, (~rdp.fog_color)&0xFF);
    for (i = 0; i < n; i++)
    {
      rdp.vtxbuf[i].f = fog;
    }
  }

  if (settings.lodmode > 0 && rdp.cur_tile < rdp.mipmap_level)
    CalculateLOD(rdp.vtxbuf, n);

  cmb.cmb_ext_use = cmb.tex_cmb_ext_use = 0;

  /*
  if (rdp.tbuff_tex)
  {
  for (int k = 0; k < 3; k++)
  {
  FRDP("v%d %f->%f, width: %d. height: %d, tex_width: %d, tex_height: %d, lr_u: %f, lr_v: %f\n", k, vv0[k], pv[k]->v1, rdp.tbuff_tex->width, rdp.tbuff_tex->height, rdp.tbuff_tex->tex_width, rdp.tbuff_tex->tex_height, rdp.tbuff_tex->lr_u, rdp.tbuff_tex->lr_v);
  }
  }
  */
  if (fullscreen)
  {
    if (settings.wireframe)
    {
      SetWireframeCol ();
      for (i=0; i<n; i++)
      {
        j = i+1;
        if (j == n) j = 0;
        grDrawLine (&rdp.vtxbuf[i], &rdp.vtxbuf[j]);
      }
    }
    else
    {

      //      VERTEX ** pv = rdp.vtx_buffer?(vtx_list2):(vtx_list1);
      //      for (int k = 0; k < n; k ++)
      //			FRDP ("DRAW[%d]: v.x = %f, v.y = %f, v.z = %f, v.u = %f, v.v = %f\n", k, pv[k]->x, pv[k]->y, pv[k]->z, pv[k]->coord[rdp.t0<<1], pv[k]->coord[(rdp.t0<<1)+1]);
      //        pv[k]->y = settings.res_y - pv[k]->y;

      if (linew > 0)
      {
        VERTEX *V0 = &rdp.vtxbuf[0];
        VERTEX *V1 = &rdp.vtxbuf[1];
        if (fabs(V0->x - V1->x) < 0.01 && fabs(V0->y - V1->y) < 0.01)
          V1 = &rdp.vtxbuf[2];
        V0->z = ScaleZ(V0->z);
        V1->z = ScaleZ(V1->z);
        VERTEX v[4];
        v[0] = *V0;
        v[1] = *V0;
        v[2] = *V1;
        v[3] = *V1;
        float width = linew * 0.25f;
        if (fabs(V0->y - V1->y) < 0.0001)
        {
          v[0].x = v[1].x = V0->x;
          v[2].x = v[3].x = V1->x;

          width *= rdp.scale_y;
          v[0].y = v[2].y = V0->y - width;
          v[1].y = v[3].y = V0->y + width;
        }
        else if (fabs(V0->x - V1->x) < 0.0001)
        {
          v[0].y = v[1].y = V0->y;
          v[2].y = v[3].y = V1->y;

          width *= rdp.scale_x;
          v[0].x = v[2].x = V0->x - width;
          v[1].x = v[3].x = V0->x + width;
        }
        else
        {
          float dx = V1->x - V0->x;
          float dy = V1->y - V0->y;
          float len = sqrtf(dx*dx + dy*dy);
          float wx = dy * width * rdp.scale_x / len;
          float wy = dx * width * rdp.scale_y / len;
          v[0].x = V0->x + wx;
          v[0].y = V0->y - wy;
          v[1].x = V0->x - wx;
          v[1].y = V0->y + wy;
          v[2].x = V1->x + wx;
          v[2].y = V1->y - wy;
          v[3].x = V1->x - wx;
          v[3].y = V1->y + wy;
        }
        grDrawTriangle(&v[0], &v[1], &v[2]);
        grDrawTriangle(&v[1], &v[2], &v[3]);
      }
      else
      {
        DepthBuffer(rdp.vtxbuf, n);
        if ((rdp.rm & 0xC10) == 0xC10)
          grDepthBiasLevel (-deltaZ);
        grDrawVertexArray (GR_TRIANGLE_FAN, n, rdp.vtx_buffer?(&vtx_list2):(&vtx_list1));
      }
    }
  }

  if (_debugger.capture) add_tri (rdp.vtxbuf, n, TRI_TRIANGLE);
}

void add_tri (VERTEX *v, int n, int type)
{
  //FRDP ("ENTER (%f, %f, %f), (%f, %f, %f), (%f, %f, %f)\n", v[0].x, v[0].y, v[0].w,
  //  v[1].x, v[1].y, v[1].w, v[2].x, v[2].y, v[2].w);

  // Debug capture
  if (_debugger.capture)
  {
    rdp.debug_n ++;

    TRI_INFO *info = new TRI_INFO;
    info->nv = n;
    info->v = new VERTEX [n];
    memcpy (info->v, v, sizeof(VERTEX)*n);
    info->cycle_mode = rdp.cycle_mode;
    info->cycle1 = rdp.cycle1;
    info->cycle2 = rdp.cycle2;
    info->uncombined = rdp.uncombined;
    info->geom_mode = rdp.geom_mode;
    info->othermode_h = rdp.othermode_h;
    info->othermode_l = rdp.othermode_l;
    info->tri_n = rdp.tri_n;
    info->type = type;

    for (int i=0; i<2; i++)
    {
      int j = rdp.cur_tile+i;
      if (i == 0)
        info->t[i].tmu = rdp.t0;
      else
        info->t[i].tmu = rdp.t1;
      info->t[i].cur_cache[0] = rdp.cur_cache_n[rdp.t0];
      info->t[i].cur_cache[1] = rdp.cur_cache_n[rdp.t1];
      info->t[i].format = rdp.tiles[j].format;
      info->t[i].size = rdp.tiles[j].size;
      info->t[i].width = rdp.tiles[j].width;
      info->t[i].height = rdp.tiles[j].height;
      info->t[i].line = rdp.tiles[j].line;
      info->t[i].palette = rdp.tiles[j].palette;
      info->t[i].clamp_s = rdp.tiles[j].clamp_s;
      info->t[i].clamp_t = rdp.tiles[j].clamp_t;
      info->t[i].mirror_s = rdp.tiles[j].mirror_s;
      info->t[i].mirror_t = rdp.tiles[j].mirror_t;
      info->t[i].shift_s = rdp.tiles[j].shift_s;
      info->t[i].shift_t = rdp.tiles[j].shift_t;
      info->t[i].mask_s = rdp.tiles[j].mask_s;
      info->t[i].mask_t = rdp.tiles[j].mask_t;
      info->t[i].ul_s = rdp.tiles[j].ul_s;
      info->t[i].ul_t = rdp.tiles[j].ul_t;
      info->t[i].lr_s = rdp.tiles[j].lr_s;
      info->t[i].lr_t = rdp.tiles[j].lr_t;
      info->t[i].t_ul_s = rdp.tiles[7].t_ul_s;
      info->t[i].t_ul_t = rdp.tiles[7].t_ul_t;
      info->t[i].t_lr_s = rdp.tiles[7].t_lr_s;
      info->t[i].t_lr_t = rdp.tiles[7].t_lr_t;
      info->t[i].scale_s = rdp.tiles[j].s_scale;
      info->t[i].scale_t = rdp.tiles[j].t_scale;
    }

    info->fog_color = rdp.fog_color;
    info->fill_color = rdp.fill_color;
    info->prim_color = rdp.prim_color;
    info->blend_color = rdp.blend_color;
    info->env_color = rdp.env_color;
    info->prim_lodmin = rdp.prim_lodmin;
    info->prim_lodfrac = rdp.prim_lodfrac;

    info->pNext = _debugger.tri_list;
    _debugger.tri_list = info;

    if (_debugger.tri_last == NULL)
      _debugger.tri_last = _debugger.tri_list;
  }
}

void update_scissor ()
{
  if (rdp.update & UPDATE_SCISSOR)
  {
    rdp.update ^= UPDATE_SCISSOR;

    // KILL the floating point error with 0.01f
    rdp.scissor.ul_x = (wxUint32)max(min((rdp.scissor_o.ul_x * rdp.scale_x + rdp.offset_x + 0.01f),settings.res_x),0);
    rdp.scissor.lr_x = (wxUint32)max(min((rdp.scissor_o.lr_x * rdp.scale_x + rdp.offset_x + 0.01f),settings.res_x),0);
    rdp.scissor.ul_y = (wxUint32)max(min((rdp.scissor_o.ul_y * rdp.scale_y + rdp.offset_y + 0.01f),settings.res_y),0);
    rdp.scissor.lr_y = (wxUint32)max(min((rdp.scissor_o.lr_y * rdp.scale_y + rdp.offset_y + 0.01f),settings.res_y),0);
    //grClipWindow specifies the hardware clipping window. Any pixels outside the clipping window are rejected.
    //Values are inclusive for minimum x and y values and exclusive for maximum x and y values.
//    grClipWindow (rdp.scissor.ul_x?rdp.scissor.ul_x+1:0, rdp.scissor.ul_y?rdp.scissor.ul_y+1:0, rdp.scissor.lr_x, rdp.scissor.lr_y);
    if (fullscreen)
      grClipWindow (rdp.scissor.ul_x, rdp.scissor.ul_y, rdp.scissor.lr_x, rdp.scissor.lr_y);
    FRDP (" |- scissor - (%d, %d) -> (%d, %d)\n", rdp.scissor.ul_x, rdp.scissor.ul_y,
      rdp.scissor.lr_x, rdp.scissor.lr_y);
  }
}

//
// update - update states if they need it
//

typedef struct
{
  unsigned int	c2_m2b:2;
  unsigned int	c1_m2b:2;
  unsigned int	c2_m2a:2;
  unsigned int	c1_m2a:2;
  unsigned int	c2_m1b:2;
  unsigned int	c1_m1b:2;
  unsigned int	c2_m1a:2;
  unsigned int	c1_m1a:2;
} rdp_blender_setting;

void update ()
{
  LRDP ("-+ update called\n");
  // Check for rendermode changes
  // Z buffer
  if (rdp.render_mode_changed & 0x00000C30)
  {
    FRDP (" |- render_mode_changed zbuf - decal: %s, update: %s, compare: %s\n",
      str_yn[(rdp.othermode_l & 0x00000400)?1:0],
      str_yn[(rdp.othermode_l&0x00000020)?1:0],
      str_yn[(rdp.othermode_l&0x00000010)?1:0]);

    rdp.render_mode_changed &= ~0x00000C30;
    rdp.update |= UPDATE_ZBUF_ENABLED;

    // Update?
    if ((rdp.othermode_l & 0x00000020))
      rdp.flags |= ZBUF_UPDATE;
    else
      rdp.flags &= ~ZBUF_UPDATE;

    // Compare?
    if (rdp.othermode_l & 0x00000010)
      rdp.flags |= ZBUF_COMPARE;
    else
      rdp.flags &= ~ZBUF_COMPARE;
  }

  // Alpha compare
  if (rdp.render_mode_changed & 0x00001000)
  {
    FRDP (" |- render_mode_changed alpha compare - on: %s\n",
      str_yn[(rdp.othermode_l&0x00001000)?1:0]);
    rdp.render_mode_changed &= ~0x00001000;
    rdp.update |= UPDATE_ALPHA_COMPARE;

    if (rdp.othermode_l & 0x00001000)
      rdp.flags |= ALPHA_COMPARE;
    else
      rdp.flags &= ~ALPHA_COMPARE;
  }

  if (rdp.render_mode_changed & 0x00002000) // alpha cvg sel
  {
    FRDP (" |- render_mode_changed alpha cvg sel - on: %s\n",
      str_yn[(rdp.othermode_l&0x00002000)?1:0]);
    rdp.render_mode_changed &= ~0x00002000;
    rdp.update |= UPDATE_COMBINE;
    rdp.update |= UPDATE_ALPHA_COMPARE;
  }

  // Force blend
  if (rdp.render_mode_changed & 0xFFFF0000)
  {
    FRDP (" |- render_mode_changed force_blend - %08lx\n", rdp.othermode_l&0xFFFF0000);
    rdp.render_mode_changed &= 0x0000FFFF;

    rdp.fbl_a0 = (wxUint8)((rdp.othermode_l>>30)&0x3);
    rdp.fbl_b0 = (wxUint8)((rdp.othermode_l>>26)&0x3);
    rdp.fbl_c0 = (wxUint8)((rdp.othermode_l>>22)&0x3);
    rdp.fbl_d0 = (wxUint8)((rdp.othermode_l>>18)&0x3);
    rdp.fbl_a1 = (wxUint8)((rdp.othermode_l>>28)&0x3);
    rdp.fbl_b1 = (wxUint8)((rdp.othermode_l>>24)&0x3);
    rdp.fbl_c1 = (wxUint8)((rdp.othermode_l>>20)&0x3);
    rdp.fbl_d1 = (wxUint8)((rdp.othermode_l>>16)&0x3);

    rdp.update |= UPDATE_COMBINE;
  }

  // Combine MUST go before texture
  if ((rdp.update & UPDATE_COMBINE) && rdp.allow_combine)
  {
    TBUFF_COLOR_IMAGE * aTBuff[2] = {0, 0};
    if (rdp.aTBuffTex[0])
      aTBuff[rdp.aTBuffTex[0]->tile] = rdp.aTBuffTex[0];
    if (rdp.aTBuffTex[1])
      aTBuff[rdp.aTBuffTex[1]->tile] = rdp.aTBuffTex[1];
    rdp.aTBuffTex[0] = aTBuff[0];
    rdp.aTBuffTex[1] = aTBuff[1];

    LRDP (" |-+ update_combine\n");
    Combine ();
  }

  if (rdp.update & UPDATE_TEXTURE)  // note: UPDATE_TEXTURE and UPDATE_COMBINE are the same
  {
    rdp.tex_ctr ++;
    if (rdp.tex_ctr == 0xFFFFFFFF)
      rdp.tex_ctr = 0;

    TexCache ();
	if (rdp.noise == RDP::noise_none)
      rdp.update ^= UPDATE_TEXTURE;
  }

  if (fullscreen)
  {
    // Z buffer
    if (rdp.update & UPDATE_ZBUF_ENABLED)
    {
      // already logged above
      rdp.update ^= UPDATE_ZBUF_ENABLED;

      if (((rdp.flags & ZBUF_ENABLED) || rdp.zsrc == 1) && rdp.cycle_mode < 2)
      {
        if (rdp.flags & ZBUF_COMPARE)
        {
          switch ((rdp.rm & 0xC00)>>10) {
            case 0:
              grDepthBiasLevel(0);
              grDepthBufferFunction (settings.zmode_compare_less ? GR_CMP_LESS : GR_CMP_LEQUAL);
              break;
            case 1:
              grDepthBiasLevel(-4);
              grDepthBufferFunction (settings.zmode_compare_less ? GR_CMP_LESS : GR_CMP_LEQUAL);
              break;
            case 2:
              grDepthBiasLevel(settings.ucode == 7 ? -4 : 0);
              grDepthBufferFunction (GR_CMP_LESS);
              break;
            case 3:
              // will be set dynamically per polygon
              //grDepthBiasLevel(-deltaZ);
              grDepthBufferFunction (GR_CMP_LEQUAL);
              break;
          }
        }
        else
        {
          grDepthBiasLevel(0);
          grDepthBufferFunction (GR_CMP_ALWAYS);
        }

        if (rdp.flags & ZBUF_UPDATE)
          grDepthMask (FXTRUE);
        else
          grDepthMask (FXFALSE);
      }
      else
      {
        grDepthBiasLevel(0);
        grDepthBufferFunction (GR_CMP_ALWAYS);
        grDepthMask (FXFALSE);
      }
    }

    // Alpha compare
    if (rdp.update & UPDATE_ALPHA_COMPARE)
    {
      // already logged above
      rdp.update ^= UPDATE_ALPHA_COMPARE;

      //	  if (rdp.acmp == 1 && !(rdp.othermode_l & 0x00002000) && !force_full_alpha)
      //      if (rdp.acmp == 1 && !(rdp.othermode_l & 0x00002000) && (rdp.blend_color&0xFF))
      if (rdp.acmp == 1 && !(rdp.othermode_l & 0x00002000) && (!(rdp.othermode_l & 0x00004000) || (rdp.blend_color&0xFF)))
      {
        wxUint8 reference = (wxUint8)(rdp.blend_color&0xFF);
        grAlphaTestFunction (reference ? GR_CMP_GEQUAL : GR_CMP_GREATER);
        grAlphaTestReferenceValue (reference);
        FRDP (" |- alpha compare: blend: %02lx\n", reference);
      }
      else
      {
        if (rdp.flags & ALPHA_COMPARE)
        {
          if ((rdp.othermode_l & 0x5000) != 0x5000)
          {
            grAlphaTestFunction (GR_CMP_GEQUAL);
            grAlphaTestReferenceValue (0x20);//0xA0);
            LRDP (" |- alpha compare: 0x20\n");
          }
          else
          {
            grAlphaTestFunction (GR_CMP_GREATER);
            if (rdp.acmp == 3)
            {
              grAlphaTestReferenceValue ((wxUint8)(rdp.blend_color&0xFF));
              FRDP (" |- alpha compare: blend: %02lx\n", rdp.blend_color&0xFF);
            }
            else
            {
              grAlphaTestReferenceValue (0x00);
              LRDP (" |- alpha compare: 0x00\n");
            }
          }
        }
        else
        {
          grAlphaTestFunction (GR_CMP_ALWAYS);
          LRDP (" |- alpha compare: none\n");
        }
      }
      if (rdp.acmp == 3 && rdp.cycle_mode < 2)
      {
        if (grStippleModeExt != 0)
        {
          if (settings.old_style_adither || rdp.alpha_dither_mode != 3) {
            LRDP (" |- alpha compare: dither\n");
            grStippleModeExt(settings.stipple_mode);
          }
          else
            grStippleModeExt(GR_STIPPLE_DISABLE);
        }
      }
      else
      {
        if (grStippleModeExt)
        {
          //LRDP (" |- alpha compare: dither disabled\n");
          grStippleModeExt(GR_STIPPLE_DISABLE);
        }
      }
    }
    // Cull mode (leave this in for z-clipped triangles)
    if (rdp.update & UPDATE_CULL_MODE)
    {
      rdp.update ^= UPDATE_CULL_MODE;
      wxUint32 mode = (rdp.flags & CULLMASK) >> CULLSHIFT;
      FRDP (" |- cull_mode - mode: %s\n", str_cull[mode]);
      switch (mode)
      {
      case 0: // cull none
      case 3: // cull both
        grCullMode(GR_CULL_DISABLE);
        break;
      case 1: // cull front
        //        grCullMode(GR_CULL_POSITIVE);
        grCullMode(GR_CULL_NEGATIVE);
        break;
      case 2: // cull back
        //        grCullMode (GR_CULL_NEGATIVE);
        grCullMode (GR_CULL_POSITIVE);
        break;
      }
    }

    //Added by Gonetz.
    if (settings.fog && (rdp.update & UPDATE_FOG_ENABLED))
    {
      rdp.update ^= UPDATE_FOG_ENABLED;

      wxUint16 blender = (wxUint16)(rdp.othermode_l >> 16);
      if (rdp.flags & FOG_ENABLED)
      {
        rdp_blender_setting &bl = *(rdp_blender_setting*)(&(blender));
        if((rdp.fog_multiplier > 0) && (bl.c1_m1a==3 || bl.c1_m2a == 3 || bl.c2_m1a == 3 || bl.c2_m2a == 3))
        {
          grFogColorValue(rdp.fog_color);
          grFogMode (GR_FOG_WITH_TABLE_ON_FOGCOORD_EXT);
          rdp.fog_mode = RDP::fog_enabled;
          LRDP("fog enabled \n");
        }
        else
        {
          LRDP("fog disabled in blender\n");
          rdp.fog_mode = RDP::fog_disabled;
          grFogMode (GR_FOG_DISABLE);
        }
      }
      else if (blender == 0xc410 || blender == 0xc411 || blender == 0xf500)
      {
        grFogColorValue(rdp.fog_color);
        grFogMode (GR_FOG_WITH_TABLE_ON_FOGCOORD_EXT);
        rdp.fog_mode = RDP::fog_blend;
        LRDP("fog blend \n");
      }
      else if (blender == 0x04d1)
      {
        grFogColorValue(rdp.fog_color);
        grFogMode (GR_FOG_WITH_TABLE_ON_FOGCOORD_EXT);
        rdp.fog_mode = RDP::fog_blend_inverse;
        LRDP("fog blend \n");
      }
      else
      {
        LRDP("fog disabled\n");
        rdp.fog_mode = RDP::fog_disabled;
        grFogMode (GR_FOG_DISABLE);
      }
    }
  }

  if (rdp.update & UPDATE_VIEWPORT)
  {
    rdp.update ^= UPDATE_VIEWPORT;
    if (fullscreen)
    {
      float scale_x = (float)fabs(rdp.view_scale[0]);
      float scale_y = (float)fabs(rdp.view_scale[1]);

      rdp.clip_min_x = max((rdp.view_trans[0] - scale_x + rdp.offset_x) / rdp.clip_ratio, 0.0f);
      rdp.clip_min_y = max((rdp.view_trans[1] - scale_y + rdp.offset_y) / rdp.clip_ratio, 0.0f);
      rdp.clip_max_x = min((rdp.view_trans[0] + scale_x + rdp.offset_x) * rdp.clip_ratio, settings.res_x);
      rdp.clip_max_y = min((rdp.view_trans[1] + scale_y + rdp.offset_y) * rdp.clip_ratio, settings.res_y);

      FRDP (" |- viewport - (%d, %d, %d, %d)\n", (wxUint32)rdp.clip_min_x, (wxUint32)rdp.clip_min_y, (wxUint32)rdp.clip_max_x, (wxUint32)rdp.clip_max_y);
      if (!rdp.scissor_set)
      {
        rdp.scissor.ul_x = (wxUint32)rdp.clip_min_x;
        rdp.scissor.lr_x = (wxUint32)rdp.clip_max_x;
        rdp.scissor.ul_y = (wxUint32)rdp.clip_min_y;
        rdp.scissor.lr_y = (wxUint32)rdp.clip_max_y;
        grClipWindow (rdp.scissor.ul_x, rdp.scissor.ul_y, rdp.scissor.lr_x, rdp.scissor.lr_y);
      }
    }
  }

  if (rdp.update & UPDATE_SCISSOR)
    update_scissor ();

  LRDP (" + update end\n");
}

void set_message_combiner ()
{
  grColorCombine (GR_COMBINE_FUNCTION_SCALE_OTHER,
    GR_COMBINE_FACTOR_ONE,
    GR_COMBINE_LOCAL_NONE,
    GR_COMBINE_OTHER_TEXTURE,
    FXFALSE);
  grAlphaCombine (GR_COMBINE_FUNCTION_SCALE_OTHER,
    GR_COMBINE_FACTOR_ONE,
    GR_COMBINE_LOCAL_NONE,
    GR_COMBINE_OTHER_TEXTURE,
    FXFALSE);
  if (settings.buff_clear && (settings.show_fps & 0x08))
    grAlphaBlendFunction (GR_BLEND_SRC_ALPHA,
    GR_BLEND_ONE_MINUS_SRC_ALPHA,
    GR_BLEND_ZERO,
    GR_BLEND_ZERO);
  else
    grAlphaBlendFunction (GR_BLEND_ONE,
    GR_BLEND_ZERO,
    GR_BLEND_ZERO,
    GR_BLEND_ZERO);
  grAlphaTestFunction (GR_CMP_ALWAYS);
  if (grStippleModeExt)
  {
    grStippleModeExt(GR_STIPPLE_DISABLE);
  }
  grTexFilterMode (0, GR_TEXTUREFILTER_BILINEAR, GR_TEXTUREFILTER_BILINEAR);
  grTexCombine (GR_TMU1,
    GR_COMBINE_FUNCTION_NONE,
    GR_COMBINE_FACTOR_NONE,
    GR_COMBINE_FUNCTION_NONE,
    GR_COMBINE_FACTOR_NONE,
    FXFALSE, FXFALSE);
  grTexCombine (GR_TMU0,
    GR_COMBINE_FUNCTION_LOCAL,
    GR_COMBINE_FACTOR_NONE,
    GR_COMBINE_FUNCTION_LOCAL,
    GR_COMBINE_FACTOR_NONE,
    FXFALSE, FXFALSE);
  grTexSource(GR_TMU0,
    voodoo.tex_min_addr[GR_TMU0] + offset_font,
    GR_MIPMAPLEVELMASK_BOTH,
    &fontTex);
  grFogMode (GR_FOG_DISABLE);
}