1 files changed, 24 insertions, 0 deletions
diff --git a/engine/src/core-data/Common/MatDefs/Blur/HGaussianBlur.frag b/engine/src/core-data/Common/MatDefs/Blur/HGaussianBlur.frag
new file mode 100644
index 0000000..35ba78b
--- /dev/null
+++ b/engine/src/core-data/Common/MatDefs/Blur/HGaussianBlur.frag
@@ -0,0 +1,24 @@
+uniform sampler2D m_Texture; // this should hold the texture rendered by the horizontal blur pass
+uniform float m_Size;
+uniform float m_Scale;
+
+varying vec2 texCoord;
+
+void main(){ 
+   float blurSize = m_Scale/m_Size;
+   vec4 sum = vec4(0.0);
+
+   // blur in x (vertical)
+   // take nine samples, with the distance blurSize between them
+   sum += texture2D(m_Texture, vec2(texCoord.x- 4.0*blurSize, texCoord.y )) * 0.05;
+   sum += texture2D(m_Texture, vec2(texCoord.x- 3.0*blurSize, texCoord.y )) * 0.09;
+   sum += texture2D(m_Texture, vec2(texCoord.x - 2.0*blurSize, texCoord.y)) * 0.12;
+   sum += texture2D(m_Texture, vec2(texCoord.x- blurSize, texCoord.y )) * 0.15;
+   sum += texture2D(m_Texture, vec2(texCoord.x, texCoord.y)) * 0.16;
+   sum += texture2D(m_Texture, vec2(texCoord.x+ blurSize, texCoord.y )) * 0.15;
+   sum += texture2D(m_Texture, vec2(texCoord.x+ 2.0*blurSize, texCoord.y )) * 0.12;
+   sum += texture2D(m_Texture, vec2(texCoord.x+ 3.0*blurSize, texCoord.y )) * 0.09;
+   sum += texture2D(m_Texture, vec2(texCoord.x+ 4.0*blurSize, texCoord.y )) * 0.05;
+
+   gl_FragColor = sum;
+}
+\ No newline at end of file