copy_dup_density.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 21 行

void main(float2 sn_coord : TEXCOORD0,
		
		  uniform samplerRECT density_rect   : TEXUNIT0,
		  uniform samplerRECT neighbour_rect : TEXUNIT1,
		  out float3 result : COLOR
		  )
{
	/*
	float2 nlist_index = float2(floor(sn_coord.y)*2, sn_coord.x);
	float neighbour_index = f1texRECT(neighbour_rect, nlist_index);
	result = f1texRECT(density_rect, unpack_2ushort(neighbour_index)*65536);
	neighbour_index = f1texRECT(neighbour_rect, nlist_index - float2(1, 0));
	result += f1texRECT(density_rect, unpack_2ushort(neighbour_index)*65536);
*/
	//result.xy = unpack_2ushort(neighbour_index)*65536;
	
	//result.xy = nlist_index - float2(1, 0);//sn_coord.xy;

	float neighbour_index = f1texRECT(neighbour_rect, sn_coord.yx);
	result = f1texRECT(density_rect, unpack_2ushort(neighbour_index)*65536);
}