Swap h and v components in sample code

iphone-andy · Feb 17, 2015 · 714b397 · 714b397
1 parent e35454d
commit 714b397
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/2015-02-10-gpu-accelerated-machine-vision.md b/2015-02-10-gpu-accelerated-machine-vision.md
@@ -118,8 +118,8 @@ void main()
    float bottomIntensity = texture2D(inputImageTexture, bottomTextureCoordinate).r;
    float topIntensity = texture2D(inputImageTexture, topTextureCoordinate).r;
 
-   float h = -topLeftIntensity - 2.0 * topIntensity - topRightIntensity + bottomLeftIntensity + 2.0 * bottomIntensity + bottomRightIntensity;
-   float v = -bottomLeftIntensity - 2.0 * leftIntensity - topLeftIntensity + bottomRightIntensity + 2.0 * rightIntensity + topRightIntensity;
+   float h = -bottomLeftIntensity - 2.0 * leftIntensity - topLeftIntensity + bottomRightIntensity + 2.0 * rightIntensity + topRightIntensity;
+   float v = -topLeftIntensity - 2.0 * topIntensity - topRightIntensity + bottomLeftIntensity + 2.0 * bottomIntensity + bottomRightIntensity;
    float mag = length(vec2(h, v));
 
    gl_FragColor = vec4(vec3(mag), 1.0);