new work

.gitignore

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+*.webm

marx.frag

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+// Title: Marx
+// Author Leo Coogan - 2025 - existential.beauty
+// Based on: https://thebookofshaders.com/edit.php#11/simplex-grid.frag
+// Author @patriciogv - 2015 - patriciogonzalezvivo.com
+
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+
+
+vec2 skew (vec2 st) {
+    vec2 r = vec2(0.0);
+    r.x = 1.1547*st.x;
+    r.y = r.x+0.5*st.x;
+    return r;
+}
+
+vec3 simplexGrid (vec2 st) {
+    vec3 xyz = vec3(0.0);
+
+    vec2 p = fract(skew(st));
+    if (p.x > p.y) {
+        xyz.xy = 1.0-vec2(p.x,p.y-p.x);
+        xyz.z = p.y;
+    } else {
+        xyz.yz = 1.0-vec2(p.x-p.y,p.y);
+        xyz.x = p.x;
+    }
+
+    return fract(xyz);
+}
+
+void main() {
+    vec2 st = gl_FragCoord.xy/u_resolution.xy;
+    vec3 color = vec3(0.0);
+
+    // Scale the space to see the grid
+    st *= 30. + u_mouse * sin(0.0001 + u_time );
+
+    // Show the 2D grid
+    color.rb = abs(st * sin(st.y));
+  color.rg = fract(st * sin(st.x * 0.1));
+  
+  
+
+    // Skew the 2D grid
+     //color.rg = fract(skew(st));
+
+    // Subdivide the grid into to equilateral triangles
+    //color = simplexGrid(st);
+  
+    // vec3 pos = vec3(st*5.0,u_time*0.5);
+
+    // color = vec3(cnoise(pos));
+      // vec4 ixy = permute(permute(ix) + iy);
+
+
+
+    gl_FragColor = vec4(color,1.0);
+}
+