sum_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 20 行

#include "sph.cg"

void main(float index : TEXCOORD0,
		  uniform samplerRECT dens_rect      : TEXUNIT0,
		  uniform samplerRECT neighbour_rect : TEXUNIT1,
		  uniform int len,
		  uniform float poly6_coef,	
		  out float3 result : COLOR)
{
	float density = 0.0;
//	int len_n = f1texRECT(neighbour_rect, float2(0, coord));
	//density = 0;f1texRECT(dens_rect, float2(coord, N_ATTR));
	for (int i = 0; i < len; i++)
	{
		float2 pair_index = f2texRECT(neighbour_rect, float2(i, index));
		density += f1texRECT(dens_rect, pair_index);//coord + float2(i, 0));
	}
	density *= poly6_coef;
	result = float3(1.0/density, 1.5f*(density - 1000.0f), 0);
}