theme mandelbrot

Assets/Scenes/GFLPC_Mandelbrot/Mandelbrot.shader

@@ -11,7 +11,7 @@ Shader "Explorer/Mandelbrot"
         _Repeat("Repeat", float) =  1
         _Speed("Speed", range(0, 1)) = 0.1
         _Symmetry("Symmetry", range(0, 1)) = 0
-        _EscapeRadius("EscapeRadius", range(0, 50)) = 20
+        _EscapeRadius("EscapeRadius", range(2, 200)) = 50
 
         _SpectrumTexture("SpectrumTexture", 2D) = "white" {}
         _SpectrumSize("SpectrumSize", float) = 16
@@ -80,17 +80,19 @@ Shader "Explorer/Mandelbrot"
                 c = rot(c, _Area.xy, _Angle);
                 float2 z;  // track pixel jumping across screen
                 float2 zPrev;
-                float r = lerp(2.0f, 20.0f, tex2D(_SpectrumTexture, 0.1f));
+                // float r = _EscapeRadius;
+                float r = lerp(2.0f, 50.0f, tex2D(_SpectrumTexture, 1.0f));
                 float r2 = r*r;
 
                 float iter;  // track current iteration
                 for (iter = 0; iter < _MaxIter; iter++) {
                     // update z based on previous z value and add original starting position
-                   //zPrev = z;
+                    // zPrev = z;
                     zPrev = rot(z, 0, _Time.y);
+                    // zPrev = rot(z, 0, clamp(tex2D(_SpectrumTexture, 0.1f) * 6.28, 1, 6.28));
+
                     z = float2(z.x*z.x-z.y*z.y, 2*z.x*z.y) + c;
                     if (dot(z, zPrev) > r2) {
-                    //if (length(z) > r) {
                         break;
                     }
                 }