投影纹理Shader代码:
VertexShader:
float4x4 matViewProjection;
float4x4 mat;
struct VS_INPUT
{
float4 Position : POSITION0;
float2 Texcoord : TEXCOORD0;
};
struct VS_OUTPUT
{
float4 Position : POSITION0;
float2 Texcoord : TEXCOORD0;
float4 Tex : TEXCOORD1;
};
VS_OUTPUT vs_main( VS_INPUT Input )
{
VS_OUTPUT Output;
float4x4 m;
Output.Position = mul( Input.Position, matViewProjection );
Output.Texcoord = Input.Texcoord;
m = mul( matViewProjection,mat );
Output.Tex = mul( Input.Position,m );
Output.Tex.y = -Output.Tex.y;
Output.Tex.xyz = Output.Tex.xyz/Output.Tex.w;
return( Output );
}
Piexl Shader:
sampler2D baseMap;
sampler2D Texture1;
struct PS_INPUT
{
float2 Texcoord : TEXCOORD0;
float4 Tex : TEXCOORD1;
};
float4 ps_main( PS_INPUT Input ) : COLOR0
{
float4 c,c1,c2;
if( Input.Tex.w < 0 )
c2 = 0;
else
c2 = tex2D( Texture1,Input.Tex );
c1 = tex2D( baseMap, Input.Texcoord );
c = lerp( c1,c2,1 );
return c;
}
