Use textureSize() instead of sending in uniforms manually. Same result, less code...

[nageru] / motion_search.vert

diff --git a/motion_search.vert b/motion_search.vert
index 9e25e7a74c19356b448706aad0c7111ee4fc22f9..28b65c225bfafdb2ab0d5f0678175ab978472930 100644 (file)
--- a/motion_search.vert
+++ b/motion_search.vert
@@ -4,7 +4,7 @@ in vec2 position;
 out vec2 flow_tc;
 out vec2 patch_center;
 
-uniform vec2 flow_size;
+uniform sampler2D flow_tex;
 
 void main()
 {
@@ -23,6 +23,7 @@ void main()
        //
        //   a = 1 / (w - 1)
        //   b = w / 2 (w - 1)
+       vec2 flow_size = textureSize(flow_tex, 0);
        vec2 a = flow_size / (flow_size - 1);
        vec2 b = -1.0 / (2 * (flow_size - 1.0));
        patch_center = a * position + b;