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alexbevi
GitHub Repository: alexbevi/BizHawk
 Path: blob/master/Assets/Lua/NES/Ninja Gaiden III.lua
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-- Ninja Gaiden 3 (USA) Collision box viewer

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-- Author: Pasky

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-- For use with Bizhawk

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local drawn = false -- Used so the player box isn't constantly drawn everytime the collision function is hit

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memory.usememorydomain("System Bus")

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function axis(x,y,color,xsize,ysize)

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	if xsize == nil then

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		xsize = 2

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	end

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	if ysize == nil then

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		ysize = 2

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	end

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	gui.drawLine(x+xsize,y,x-xsize,y,color)

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	gui.drawLine(x,y+ysize,x,y-ysize,color)

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	gui.drawLine(x,y,x,y,"#000000FF")

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end

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local function collision()  -- Collision between enemies

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	if memory.read_u8(0xA2CA) == 0xBD and memory.read_u8(0xA2CB) == 0x16 and memory.read_u8(0xA2CC) == 0x05 then -- Bank check

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		local xreg = emu.getregister("X")

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		local yreg = emu.getregister("Y")

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		-- Enemy

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		local x = memory.read_u8(0x516 + xreg)

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		local y = memory.read_u8(0x58E + xreg)

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		-- Enemy boxes

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		local xrad = memory.read_u8(0x052E + xreg)

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		local yrad = memory.read_u8(0x05A6 + xreg)

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		gui.drawBox(x-xrad,y-yrad,x+xrad,y+yrad,0xFFFF0000,0x40FF0000)

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		local invuln = bit.bor(memory.read_u8(0x4E6 + xreg),memory.read_u8(0x4CE + xreg))

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		if bit.band(invuln,0x02) == 0x02 then

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			axis(x,y,0xFFFFFFFF,xrad,yrad)

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		end	

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		-- Player

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		if drawn == false then

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			x = memory.read_u8(0x516)

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			y = memory.read_u8(0x58E)

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			xrad = 0x06

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			yrad = memory.read_u8(0x8C)

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			gui.drawBox(x-xrad,y-yrad,x+xrad,y+yrad,0xFF0000FF,0x400000FF)

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			axis(x,y)

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			drawn = true

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		end

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	end

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end

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local function pattack() -- Player attacks

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	if memory.read_u8(0xA050) == 0xBD and memory.read_u8(0xA051) == 0x16 and memory.read_u8(0xA052) == 0x05 then -- Bank check

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		local xreg = emu.getregister("X")

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		local yreg = emu.getregister("Y")

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		local x = memory.read_u8(0x516)

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		if bit.band(memory.read_u8(0x4CE),0x40) == 0x40 then

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			x = x - memory.read_u8(0xAA)

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		else

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			x = x + memory.read_u8(0xAA)

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		end

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		local y = memory.read_u8(0x58E) - 0x08

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		local xrad = memory.read_u8(0xAA)

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		local yrad = memory.read_u8(0xAB)

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		gui.drawBox(x-xrad,y-yrad,x+xrad,y+yrad,0xFFFFFFFF,0x40FFFFFF)

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		-- Enemy vulnerability boxes (green)

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		x = memory.read_u8(0x516 + xreg)

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		y = memory.read_u8(0x58E + xreg)

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		xrad = memory.read_u8(0x052E + xreg)

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		yrad = memory.read_u8(0x05A6 + xreg)

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		gui.drawBox(x-xrad,y-yrad,x+xrad,y+yrad,0xFF00FF00,0x4000FF00)

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		local invuln = bit.bor(memory.read_u8(0x4E6 + xreg),memory.read_u8(0x4CE + xreg))

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		if bit.band(invuln,0x02) == 0x02 then

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			axis(x,y,0xFFFFFFFF,xrad,yrad)

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		end	

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	end

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end

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local function subweapon() -- Player sub weapons

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	if memory.read_u8(0xA050) == 0xBD and memory.read_u8(0xA051) == 0x16 and memory.read_u8(0xA052) == 0x05 then -- Bank check

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		local xreg = emu.getregister("X")

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		local yreg = emu.getregister("Y")

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		local x = memory.read_u8(0x51E + yreg)

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		local y = memory.read_u8(0x596 + yreg)

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		local wrad = memory.read_u8(0x9E)

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		gui.drawBox(x-wrad,y-wrad,x+wrad,y+wrad)

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		-- Enemy projectile vulnerability boxes (green)

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		x = memory.read_u8(0x516 + xreg)

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		y = memory.read_u8(0x58E + xreg)

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		xrad = memory.read_u8(0x052E + xreg)

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		yrad = memory.read_u8(0x05A6 + xreg)

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		gui.drawBox(x-xrad,y-yrad,x+xrad,y+yrad,0xFF00FF00,0x4000FF00)

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		local invuln = bit.bor(memory.read_u8(0x4E6 + xreg),memory.read_u8(0x4CE + xreg))

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		if bit.band(invuln,0x02) == 0x02 then

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			axis(x,y,0xFFFFFFFF,xrad,yrad)

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		end	

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	end

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end

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event.onmemoryexecute(collision,0xA2CA)

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event.onmemoryexecute(pattack,0xA050)

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event.onmemoryexecute(subweapon,0xA1DB)

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while true do

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	emu.frameadvance()

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	drawn = false

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end

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