struct Plain_OUT
{
 float4 vPos : POSITION;
 float4 color :COLOR0;
};

struct PlainTex_OUT
{
 float4 vPos : POSITION;
 float4 color :COLOR0;
 float4 texCoord: TEXCOORD0;
};

struct VPos_OUT
{
 float4 VPos : POSITION;
 float4 VPosition : TEXCOORD0;
};

struct CPos_OUT
{
 float4 VPos : POSITION;
 float4 CPos : TEXCOORD0;
};


float4 VDepth(VPos_OUT IN) : COLOR
{
 float4 pos = IN.VPosition / IN.VPosition.w;
 return float4(pos.z, pos.z * pos.z, 1, 1);	
}

float4 CDepth(CPos_OUT IN) : COLOR
{
 return -IN.CPos.z;	
}

float4 CDist(CPos_OUT IN) : COLOR
{
 float dist = length(IN.CPos.xyz);
 return float4(dist, dist * dist, 1, dist);	
}

float4 CDistNorm(CPos_OUT IN,
				uniform float farPlane) : COLOR
{
 float dist = length(IN.CPos.xyz) / farPlane;
 return float4(dist, dist * dist, 1, dist);	
}

float4 Plain(Plain_OUT IN) :COLOR0
{
 return IN.color;
}

float4 PlainTex2D(PlainTex_OUT IN,
                uniform sampler2D Texture) : COLOR
{
 return IN.color * tex2D(Texture, IN.texCoord.xy);
}

float4 PlainTex1D(PlainTex_OUT IN,
                  uniform sampler1D Texture) : COLOR
{
 return IN.color * tex1D(Texture, IN.texCoord.x);
}

float4 PlainTex3D(PlainTex_OUT IN,
                  uniform sampler3D Texture) : COLOR
{
 return IN.color * tex3D(Texture, IN.texCoord.xyz);
}