Fixes incorrect values in example. See issue processing#1021.

src/data/examples/assets/uniforms.frag

@@ -54,8 +54,8 @@ vec4 poly(float x, float y, float size, float sides, float rotation, vec3 col){
 
 void main() {
 
-    vec2 center = resolution * 1.0; // draw the shape at the center of the screen
-    float size = resolution.y * 0.5; // make the shape a quarter of the screen height
+    vec2 center = resolution * 0.5; // draw the shape at the center of the screen
+    float size = resolution.y * 0.25; // make the shape a quarter of the screen height
     float sides = mod(floor(mouse), 7.0) + 3.0; // slowly increase the sides, when it reaches 10 sides, go back down to 3
     float rotation = time; // rotation is in radians, but for time it doesnt really matter