docs and type fixes

examples/fragment.glsl

@@ -68,7 +68,7 @@ float limit(float val, float min, float max) {
 }
 
 void mainImage(out vec4 fragColor, in vec2 fragCoord) {
-    vec2 screen_uv = gl_FragCoord.xy / iResolution;
+    vec2 screen_uv = gl_FragCoord.xy / iResolution.xy;
     // We'll make origin in the top-left.
     screen_uv.y = 1.0 - screen_uv.y;
     screen_uv.x *= iResolution.x / iResolution.y;

examples/texture.glsl

@@ -1,5 +1,5 @@
 void mainImage(out vec4 fragColor, in vec2 fragCoord) {
-    vec2 uv = fragCoord / iResolution;
+    vec2 uv = fragCoord / iResolution.xy;
     uv = vec2(uv.x, 1.0 - uv.y);
     // mixes two textures
     //fragColor = mix(texture(iChannel0, uv), texture(iChannel1, uv), 0.2);

examples/wavy.glsl

@@ -1,7 +1,7 @@
 #define PI 3.1415926538
 
 void mainImage(out vec4 fragColor, in vec2 fragCoord) {
-    vec2 uv = fragCoord / iResolution;
+    vec2 uv = fragCoord / iResolution.xy;
 
     vec2 lines_uv = uv;