[RenderMonkey] Edge Detection

[RenderMonkey] Edge Detection

---

// Vertex Shader

struct VS_INPUT
{
    float4 mPosition: POSITION;
    float2 mUV : TEXCOORD0;
};


struct VS_OUTPUT
{
    float4 mPosition: POSITION;
    float2 mUV : TEXCOORD0;
};


VS_OUTPUT vs_main(VS_INPUT Input)
{
    VS_OUTPUT Output;

    Output.mPosition = Input.mPosition;
    Output.mUV = Input.mUV;

    return Output;
}

// Pixel Shader
// 외곽 검출

struct PS_INPUT
{
    float2 mUV : TEXCOORD0;
};

sampler2D SceneSampler;

float3x3 Kx = { -1, 0, 1, -2, 0, 2, -1, 0, 1 };

float3x3 Ky = { 1, 2, 1, 0, 0, 0, -1, -2, -1 };

float2 gPixelOffset;

float4 ps_main(PS_INPUT Input) : COLOR
{
   float Lx = 0;
   float Ly = 0;

   for (int y = -1; y <= 1; ++y)
   {
      for (int x = -1; x <= 1; ++x)
      {
         float2 offset = float2(x, y) * gPixelOffset;
         float3 tex = tex2D(SceneSampler, Input.mUV + offset).rgb;
         float luminance = dot(tex, float3(0.3, 0.59, 0.11));

         Lx += luminance * Kx[y + 1][x + 1];
         Ly += luminance * Ky[y + 1][x + 1];
      }
   }

   float L = sqrt((Lx * Lx) + (Ly * Ly));
   return float4(L.xxx, 1);

}

// Pixel Shader
// 엠보싱

struct PS_INPUT
{
    float2 mUV : TEXCOORD0;
};

sampler2D SceneSampler;

float3x3 K = { -2, -1, 0, -1, 0, 1, 0, 1, 2 };

float2 gPixelOffset;

float4 ps_main(PS_INPUT Input) : COLOR
{
   float res = 0;
   for (int y = -1; y <= 1; ++y)
   {
      for (int x = -1; x <= 1; ++x)
      {
         float2 offset = float2(x, y) * gPixelOffset;
         float3 tex = tex2D(SceneSampler, Input.mUV + offset).rgb;
         float luminance = dot(tex, float3(0.3, 0.59, 0.11));

         res += luminance * K[y + 1][x + 1];
      }
   }

   res += 0.5f;

   return float4(res.xxx, 1);
}

 

color Conversion 추가 되어 있음 : https://asatala.tistory.com/84