greg/Spazer
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Random, tiles

Browse Source
This commit is contained in:
Greg Shuflin 2025-02-13 16:15:03 -08:00
parent 608e44b82a
commit 85657e00a2
1 changed files with 19 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/psychadelic-graphics/psychadelicColors.frag.glsl
View File

@ -9,6 +9,11 @@ uniform float u_canvasHeight;
out vec4 fragColor; out vec4 fragColor;
// See https://thebookofshaders.com/10/
float random (vec2 st) {
return fract(sin(dot(st.xy, vec2(12.9898,78.233)))* 43758.5453123);
}
void main() { void main() {
vec2 uv = gl_FragCoord.xy/vec2(u_canvasWidth, u_canvasHeight); vec2 uv = gl_FragCoord.xy/vec2(u_canvasWidth, u_canvasHeight);
@ -16,12 +21,19 @@ void main() {
vec3 green = vec3(0.0, 1.0, 0.0); vec3 green = vec3(0.0, 1.0, 0.0);
vec3 blue = vec3(0.0, 0.0, 1.0); vec3 blue = vec3(0.0, 0.0, 1.0);
if (uv.x < 0.33) { float size = 0.05;
fragColor = vec4(red, 1.0);
} else if (uv.x < 0.66) { uv.x = floor(uv.x / size) * size;
fragColor = vec4(green, 1.0); uv.y = floor(uv.y / size) * size;
} else {
fragColor = vec4(blue, 1.0); float rand = random(uv);
}
float period = 5.0;
float mask = mod(u_time / period, 1.0);
float x = rand < mask ? uv.x : 0.0;
float y = rand < mask ? uv.y : 0.0;
fragColor = vec4(x, 0.0, y, 1.0);
} }