update_position_only_by_vel.cg

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#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;
}