update_position_only_by_vel.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 12 行

#include "sph.cg"

void main(fixed index : TEXCOORD0,
		  uniform samplerRECT attr_rect : TEXUNIT0,
		  uniform float timestep,
		  out float3 result : COLOR)
{
	float3 pos = f3texRECT(attr_rect, half2(index, GPU_ATTR_POS));
	float3 vel = f3texRECT(attr_rect, half2(index, GPU_ATTR_VEL));

	result = pos + timestep*vel;
}