copy_dup_force.cg

来自「游戏编程精粹６第中关于粒子的实时流体仿真系统,对入门的游戏开发者很有帮助．」· CG 代码 · 共 20 行

void main(float2 sn_coord : TEXCOORD0,
		  /**	
		  y  : subject particle index
		  xy : neighbour particle index
		  **/
		  uniform samplerRECT force_rect     : TEXUNIT0,
		  uniform samplerRECT neighbour_rect : TEXUNIT1,
		  out float3 result : COLOR
		  )
{
	float neighbour_index = f1texRECT(neighbour_rect, sn_coord.yx);
	result = -f3texRECT(force_rect, unpack_2ushort(neighbour_index)*65536);

	//float3 f2me = -f3texRECT(force_rect, unpack_2ushort(neighbour_index)*65536);
	//result.xy = (unpack_2ushort(neighbour_index)*65536);
	//result.z = f2me.x;

	//result.xy = sn_coord;
	//result.x = 44;
}