0005: thoughtform complete

src/005-thoughtform-hidenoe/shaders/noe.frag

@@ -17,10 +17,11 @@ out vec4 fragColor;
 
 const float margin = 0.5;
 
-// 	float r = length(m);
-	// float a = atan(m.y, m.x);
-	// float v = sin(100.*(sqrt(r)-0.02*a-.3*t));
-	// return clamp(v,0.,1.);
+vec3 hsv2rgb(vec3 c) {
+  vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+  vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+  return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+}
 
 void main() {
   // 0..1 to -1..1
@@ -33,6 +34,11 @@ void main() {
   float theta = atan(cUV.y, cUV.x) ;
   float spiral = sin(100.0 * (sqrt(circleDistance*20.0) - 10.0 * theta - 0.01 * u_time * 0.001)); 
 
-  float edgeLightZone = pow(clamp(abs(dot(cUV.xyx, light_pos)), 0.0, 1.0) * 2.0, 7.0);
-  fragColor = vec4(0.0, spiral, edgeLightZone, 1.0);
-}
+  float edgeLightZone = pow(clamp(abs(dot(cUV.xyx, light_pos)), 0.0, 1.0) * 2.0, 4.0);
+
+  float colorSpiral = sin(100.0 * (sqrt(circleDistance * 10.0) - 0.001 * theta - 0.3 * u_time * 0.00005));
+  vec3 hueRotation = hsv2rgb(vec3(colorSpiral, 1.0, 0.5));
+
+  fragColor = vec4(hueRotation * spiral * edgeLightZone, 1.0);
+  fragColor.rgb += min(spiral, 0.0041666);
+}