motion blur

shaders/postfx_motionblur.frag

@@ -0,0 +1,30 @@
+#version 330 core
+  
+in vec2 f_coords;
+
+#texture (color_tex, 0, RGB)
+uniform sampler2D color_tex;
+
+#texture (velocity_tex, 1, RG)
+uniform sampler2D velocity_tex;
+
+#include <common>
+
+void main()
+{    
+    vec2 texelSize = 1.0 / vec2(textureSize(color_tex, 0));
+    vec2 velocity = texture(velocity_tex, f_coords).rg * param[0].r;
+    
+    float speed = length(velocity / texelSize);
+    int nSamples = clamp(int(speed), 1, 64);
+    
+    vec4 oResult = texture(color_tex, f_coords);
+    for (int i = 1; i < nSamples; ++i)
+    {
+        vec2 offset = velocity * (float(i) / float(nSamples - 1) - 0.5);
+        oResult += texture(color_tex, f_coords + offset);
+    }
+    oResult /= float(nSamples);
+    
+    gl_FragData[0] = oResult;
+}