1 files changed, 47 insertions, 0 deletions
diff --git a/engine/src/core-data/Common/MatDefs/Blur/RadialBlur.frag b/engine/src/core-data/Common/MatDefs/Blur/RadialBlur.frag
new file mode 100644
index 0000000..b3adfd4
--- /dev/null
+++ b/engine/src/core-data/Common/MatDefs/Blur/RadialBlur.frag
@@ -0,0 +1,47 @@
+uniform sampler2D m_Texture;
+uniform float m_SampleDist;
+uniform float m_SampleStrength;
+uniform float m_Samples[10];
+varying vec2 texCoord;
+
+void main(void)
+{
+   // some sample positions
+   //float samples[10] =   float[](-0.08,-0.05,-0.03,-0.02,-0.01,0.01,0.02,0.03,0.05,0.08);
+
+    // 0.5,0.5 is the center of the screen
+    // so substracting texCoord from it will result in
+    // a vector pointing to the middle of the screen
+    vec2 dir = 0.5 - texCoord;
+
+    // calculate the distance to the center of the screen
+    float dist = sqrt(dir.x*dir.x + dir.y*dir.y);
+
+    // normalize the direction (reuse the distance)
+    dir = dir/dist;
+
+    // this is the original colour of this fragment
+    // using only this would result in a nonblurred version
+    vec4 colorRes = texture2D(m_Texture,texCoord);
+
+    vec4 sum = colorRes;
+
+    // take 10 additional blur samples in the direction towards
+    // the center of the screen
+    for (int i = 0; i < 10; i++)
+    {
+      sum += texture2D( m_Texture, texCoord + dir * m_Samples[i] * m_SampleDist );
+    }
+
+    // we have taken eleven samples
+    sum *= 1.0/11.0;
+
+    // weighten the blur effect with the distance to the
+    // center of the screen ( further out is blurred more)
+    float t = dist * m_SampleStrength;
+    t = clamp( t ,0.0,1.0); //0 &lt;= t &lt;= 1
+
+    //Blend the original color with the averaged pixels
+    gl_FragColor =mix( colorRes, sum, t );
+     
+}
+\ No newline at end of file