publish: Add sketch 5, "glow lines" Fix an issue with the displacement fragment shader

generated from commit 5e6d27e70417d909df95696e2e938207e4b3de7a

shaders/displacement.frag

@@ -13,12 +13,14 @@ uniform float u_intensity;
 void main() {
 
   vec2 uv = vTexCoord;
-  // the texture is loaded upside down and backwards by default so lets flip it
-  uv = 1.0 - uv;
 
   // get the displacement map as a vec4 using texture2D
   vec4 mapTex = texture2D(u_map, uv);
 
+  // the texture is loaded upside down and backwards by default so lets flip it
+  // uv = 1.0 - uv;
+  uv[1] = 1.0 - uv[1];
+
   // lets get the average color of the rgb values
   float avg = dot(mapTex.rgb, vec3(0.33333));