Create square_wave.frag

algroznykh · Nov 25, 2021 · f107d0a · f107d0a
1 parent e280352
commit f107d0a
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/square_wave.frag b/square_wave.frag
@@ -0,0 +1,17 @@
+float circle(vec2 p, float r) {
+    return length(p) - pow(r, 2.);
+}
+
+void main(){
+    vec2 uv = uv();
+    float w = 0.;
+
+    for (int i=0; i<32; i++)
+        if (mod(float(i), 2.) !=0. ) {
+            w += sin(2. * acos(-1.) * circle(uv, .5) * float(i)) ;
+        }
+
+    // w = sin(circle(uv, 1.) * 8.);
+    vec3 color = w > 0. ? vec3(w, 0., 0.): vec3(0., 0., abs(w));
+    gl_FragColor = vec4(color, 1.) / 4.;
+}