float4x4 worldViewProj;  // World * View * Projection transformation
float3 lightDir;         // Light direction
float3 viewPos;       // camera position
float4x4 world;

float mod(float x, float y)
{
  return x - y * floor(x/y);
}

struct VS_OUTPUT
{
   float4 Position   : POSITION;   // vertex position
   float3 PixelPos     : TEXCOORD0;
};


VS_OUTPUT vertexMain(in float4 vPosition : POSITION0)
{
   VS_OUTPUT Output;

   Output.Position = mul(vPosition, worldViewProj);
   float4 worldpos = mul(vPosition, world);
   Output.PixelPos = float3(worldpos.x, worldpos.y, worldpos.z);

   return Output;
}


struct PS_OUTPUT
{
    float4 RGBColor : COLOR0;  // Pixel color   
};


texture ModelTexture;
sampler2D textureSampler = sampler_state {
    Texture = (ModelTexture);
    MinFilter = Linear;
    MagFilter = Linear;
    AddressU = Clamp;
    AddressV = Clamp;
};   

PS_OUTPUT pixelMain(float4 Position : POSITION,
               float3 PixelPos : TEXCOORD0)
{
   PS_OUTPUT Output;
   
   float3 posfromview = normalize(PixelPos - viewPos);
   float angleindex = (180*abs(dot(posfromview, lightDir)))/.05;

   Output.RGBColor = tex2D(textureSampler, float2(mod(angleindex, 64)/64, 1 - (floor(angleindex/64)/64)));
   //Output.RGBColor = float4(1, 1, 1, 1)*(angleindex)/1800;

   return Output;
}

float4x4 worldViewProj;  // World * View * Projection transformation
float4x4 worldView;      // World * View transformation
float3 lightDir;         // Light direction (Note: HAS to be in camera space)

struct VS_OUTPUT
{
   float4 Position   : POSITION;   // vertex position
   float3 PixelPos   : TEXCOORD0;  // vertex position in camera space
};


VS_OUTPUT vertexMain(in float4 vPosition : POSITION0)
{
   VS_OUTPUT Output;

   Output.Position = mul(vPosition, worldViewProj);
   float4 camerapos = mul(vPosition, worldView);
   Output.PixelPos = float3(camerapos.x, camerapos.y, camerapos.z);

   return Output;
}


struct PS_OUTPUT
{
    float4 RGBColor : COLOR0;  // Pixel color   
};


texture ModelTexture;
sampler1D textureSampler = sampler_state {
    Texture = (ModelTexture);
    MinFilter = Linear; // Je nach dem was du vor hast, musst du das auf "Point" umstellen oder wie es in HLSL heisst
    MagFilter = Linear;
    AddressU = Clamp;
};

PS_OUTPUT pixelMain(float4 Position : POSITION,
               float3 PixelPos : TEXCOORD0)
{
   PS_OUTPUT Output;
   
   float3 posfromview = normalize(PixelPos);
   float angle = clamp(dot(posfromview, lightDir), 0.0, 1.0);

   Output.RGBColor = tex1D(textureSampler, angle);

   return Output;
}