blue_fish.inc.c

/**
 * @file blue_fish.inc.c
 * Implements behaviour and spawning for bhvBlueFish located in the castle aquarium outside of SA.
 */

/**
 * Determines fish movement.
 */
void bhv_blue_fish_movement_loop(void) {
    f32 randomSwitch;
    switch (o->oAction) {
        // Initial dive phase after spawning
        case BLUE_FISH_ACT_DIVE:
            cur_obj_init_animation_with_accel_and_sound(0, 1.0f);
            
            // Assigns random values to variables that help determine natural motion.
            if (o->oTimer == 0) {
                o->oBlueFishRandomAngle = random_sign() << 11;
                o->oBlueFishRandomVel = random_float() * 2;
                o->oBlueFishRandomTime = (s32)(random_float() * 30) & 0xFE;
                
                // Adjusts pitch velocity or sets to zero dependant on outcome of randomSwitch.
                randomSwitch = random_float() * 5;
                if (randomSwitch < 2.0f) {
                    o->oAngleVelPitch = random_f32_around_zero(128);
                } else {
                    o->oAngleVelPitch = 0;
                }
            }
            
            // Set forward velocity and progress oAction to BLUE_FISH_ACT_TURN.
            o->oForwardVel = o->oBlueFishRandomVel + 3.0f;
            if (o->oTimer >= o->oBlueFishRandomTime + 60) {
                o->oAction++;
            }
            
            // Set pitch velocity
            if (o->oTimer < (o->oBlueFishRandomTime + 60) / 2) {
                o->oFaceAnglePitch += o->oAngleVelPitch;
            } else {
                o->oFaceAnglePitch -= o->oAngleVelPitch;
            }
            
            // Calculate new Y velocity
            o->oVelY = -sins(o->oFaceAnglePitch) * o->oForwardVel;
            break;
        // Animates and adjusts fish yaw angle.
        case BLUE_FISH_ACT_TURN:
            cur_obj_init_animation_with_accel_and_sound(0, 2.0f);
            o->oMoveAngleYaw = (s32)(o->oBlueFishRandomAngle + o->oMoveAngleYaw);
            if (o->oTimer == 15) {
                o->oAction++;
            }
            break;  
        // Animates and adjusts pitch to an upward direction.
        case BLUE_FISH_ACT_ASCEND:
            cur_obj_init_animation_with_accel_and_sound(0, 1.0f);
            
            // Progresses oAction to BLUE_FISH_ACT_TURN_BACK after elapsed time. 
            if (o->oTimer >= o->oBlueFishRandomTime + 60) {
                o->oAction++;
            }
            
            // Adjusts pitch angle. Direction relies on time not passed.
            if (o->oTimer < (o->oBlueFishRandomTime + 60) / 2) {
                o->oFaceAnglePitch -= o->oAngleVelPitch;
            } else {
                o->oFaceAnglePitch += o->oAngleVelPitch;
            }
            break; 
        // Animates and turns fish around
        case BLUE_FISH_ACT_TURN_BACK:
            cur_obj_init_animation_with_accel_and_sound(0, 2.0f);
            o->oMoveAngleYaw = (s32)(o->oBlueFishRandomAngle + o->oMoveAngleYaw);
            
            // Sets the fish back to the BLUE_FISH_ACT_DIVE phase.
            if (o->oTimer == 15) {
                o->oAction = BLUE_FISH_ACT_DIVE;
            }
            break;
    }
    
    // Calculates Y velocity and calls physics engine.
    o->oVelY = -sins(o->oFaceAnglePitch) * o->oForwardVel;
    cur_obj_move_using_fvel_and_gravity();
    
    // Deletes object if the parent has oAction set to BLUE_FISH_ACT_DUPLICATE.
    if (o->parentObj->oAction == BLUE_FISH_ACT_DUPLICATE) {
        obj_mark_for_deletion(o);
    }
}

/**
 * Spawns fifteen fish if Mario resides in room fifteen or seven.
 * They move at random within 200.0f
 */
void bhv_tank_fish_group_loop(void) {
    struct Object *fish;
    s32 i;
    switch (o->oAction) {
        case BLUE_FISH_ACT_SPAWN:
            if (gMarioCurrentRoom == 15 || gMarioCurrentRoom == 7) {
                
                // spawns fifteen fish and moves them within 200.0f
                for (i = 0; i < 15; i++) {
                    fish = spawn_object_relative(0, 300, 0, -200, o, MODEL_FISH, bhvBlueFish);
                    obj_translate_xyz_random(fish, 200.0f);
                }
                
                // Proceed to BLUE_FISH_ACT_ROOM phase.
                o->oAction++;
            }
            break;
            
        // Sets next oAction phase if Mario is not in rooms fifteen and seven.
        case BLUE_FISH_ACT_ROOM:
            if (gMarioCurrentRoom != 15 && gMarioCurrentRoom != 7) {
                o->oAction++;
            }
            break;
            
        // Sets oAction to the BLUE_FISH_ACT_SPAWN phase.
        case BLUE_FISH_ACT_DUPLICATE:
            o->oAction = BLUE_FISH_ACT_SPAWN;
            break;
    }
}