sum_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 19 行

#include "sph.cg"

void main(float index : TEXCOORD0,
		  uniform samplerRECT force_rect     : TEXUNIT0,
		  uniform samplerRECT neighbour_rect : TEXUNIT1,
		  uniform int len,
		  out float3 result : COLOR)
{
	float3 force = float3(0, 0, 0);
	for (int i = 0; i < len; i++)
	{
		float2 pair_index = f2texRECT(neighbour_rect, float2(i, index));
		float3 f = f3texRECT(force_rect, pair_index);//coord + float2(i, 0));
		if (pair_index.x < 0.0f)
			f -= f;
		force += f;
	}
	result = force;
}