Hi,
I'm just implementing terrain texture splatting and I've hit a problem. I can see that the alpha blending has worked but there seems to be no detail on the texture. Just a solid green or gray, depending on the given texture.
Some code...
Setting effect file
// transformations provided by the app as input
float4x4 matWorldViewProj: WORLDVIEWPROJECTION;
float4x4 matWorld :WORLD;
float3 vecLightDir;
texture BaseTexture;
texture OneTexture;
texture TwoTexture;
texture ThreeTexture;
texture AlphaTexture;
sampler2D Base : register(s0) = sampler_state
{
texture = <BaseTexture>;
AddressU = WRAP;
AddressV = WRAP;
MIPFILTER = LINEAR;
MINFILTER = LINEAR;
MAGFILTER = LINEAR;
};
sampler2D One : register(s1) = sampler_state
{
texture = <OneTexture>;
AddressU = WRAP;
AddressV = WRAP;
MIPFILTER = LINEAR;
MINFILTER = LINEAR;
MAGFILTER = LINEAR;
};
sampler2D Two : register(s2) = sampler_state
{
texture = <TwoTexture>;
AddressU = WRAP;
AddressV = WRAP;
MIPFILTER = LINEAR;
MINFILTER = LINEAR;
MAGFILTER = LINEAR;
};
sampler2D Three : register(s3) = sampler_state
{
texture = <ThreeTexture>;
AddressU = WRAP;
AddressV = WRAP;
MIPFILTER = LINEAR;
MINFILTER = LINEAR;
MAGFILTER = LINEAR;
};
sampler2D Alpha : register(s4) = sampler_state
{
texture = <AlphaTexture>;
AddressU = WRAP;
AddressV = WRAP;
MIPFILTER = LINEAR;
MINFILTER = LINEAR;
MAGFILTER = LINEAR;
};
Vertex Shader
struct VS_INPUT
{
float4 Pos : POSITION;
float2 AlphaTexture : TEXCOORD0;
float2 BaseTexture : TEXCOORD1;
float2 OneTexture : TEXCOORD2;
float2 TwoTexture : TEXCOORD3;
float2 ThreeTexture : TEXCOORD4;
float3 Normal: NORMAL;
};
struct VS_OUTPUT
{
float4 Pos : POSITION;
float2 AlphaTexture : TEXCOORD0;
float2 BaseTexture : TEXCOORD1;
float2 OneTexture : TEXCOORD2;
float2 TwoTexture : TEXCOORD3;
float2 ThreeTexture : TEXCOORD4;
float3 Light: TEXCOORD5;
float3 Norm : TEXCOORD6;
};
VS_OUTPUT VS(VS_INPUT IN)
{
VS_OUTPUT Out = (VS_OUTPUT)0;
//Transform vertex positions
//Transform Position
Out.Pos = mul( matWorldViewProj,IN.Pos );
//Texture co-ordinate
Out.BaseTexture = IN.BaseTexture;
Out.OneTexture = IN.OneTexture;
Out.TwoTexture = IN.TwoTexture;
Out.ThreeTexture = IN.ThreeTexture;
Out.AlphaTexture = IN.AlphaTexture;
//Light direction
Out.Light = normalize(vecLightDir);
//Normal
Out.Norm = normalize(mul(IN.Normal,matWorld));
return Out;
}
Pixel Shader
struct PS_INPUT
{
float2 AlphaTexture : TEXCOORD0;
float2 BaseTexture : TEXCOORD1;
float2 OneTexture : TEXCOORD2;
float2 TwoTexture : TEXCOORD3;
float2 ThreeTexture : TEXCOORD4;
float3 Light : TEXCOORD5;
float3 Norm : TEXCOORD6;
};
struct PS_OUTPUT
{
float4 tex : COLOR0;
};
PS_OUTPUT PS(PS_INPUT IN)
{
PS_OUTPUT output = (PS_OUTPUT)0;
//Get textures
float4 b = tex2D(Base, IN.BaseTexture);
float4 a = tex2D(Alpha, IN.AlphaTexture);
float4 i = tex2D(One, IN.OneTexture);
float4 j = tex2D(Two, IN.TwoTexture);
float4 k = tex2D(Three, IN.ThreeTexture);
// combine texel colors
b = (a.r * i) + ((1 - a.r) * b);
b = (a.g * j) + ((1 - a.g) * b);
b = (a.b * k) + ((1 - a.b) * b);
b = b *(saturate(max(0.0f,dot(IN.Norm,IN.Light)) + 0.3f));
output.tex = b;
return output;
}
Technique
// Effect technique to be used
technique Terrain
{
pass P0
{
// shaders
VertexShader = compile vs_1_1 VS();
PixelShader = compile ps_2_0 PS();
//fillmode = wireframe;
sampler[0] = (Base);
}
}
PICTURE
I dont have an stuff like SetTexture as its all done in the effect file.
If anyone can see my mistake i would be in debt to them.
Thanks
C.
[Edited by - colinolivant on December 1, 2007 11:38:28 AM]
