resync and updated

resources/shaders/fire.frag

@@ -23,6 +23,10 @@ uniform vec4 uGradient3;
 uniform vec4 uGradient4;
 uniform vec4 uGradient5;
 
+//new
+uniform bool uRandomColor;
+uniform float uSeed;
+
 // These may be configurable in the future.
 const float EDGE_FADE  = 70.0;
 const float FADE_WIDTH = 0.1;
@@ -58,6 +62,36 @@ vec4 getFireColor(float v) {
   return colors[4];
 }
 
+vec4 getFireColorV2(float v, vec4 c0, vec4 c1, vec4 c2, vec4 c3, vec4 c4) 
+{
+  float steps[5];
+  steps[0] = 0.0;
+  steps[1] = 0.2;
+  steps[2] = 0.35;
+  steps[3] = 0.5;
+  steps[4] = 0.8;
+
+  vec4 colors[5];
+  colors[0] = c0;
+  colors[1] = c1;
+  colors[2] = c2;
+  colors[3] = c3;
+  colors[4] = c4;
+
+  if (v < steps[0]) {
+    return colors[0];
+  }
+
+  for (int i = 0; i < 4; ++i) {
+    if (v <= steps[i + 1]) {
+      return mix(colors[i], colors[i + 1],
+                 vec4(v - steps[i]) / (steps[i + 1] - steps[i]));
+    }
+  }
+
+  return colors[4];
+}
+
 // This method requires the uniforms from standardUniforms() to be available.
 // It returns two values: The first is an alpha value which can be used for the window
 // texture. This gradually dissolves the window from top to bottom. The second can be used
@@ -114,7 +148,28 @@ void main() {
   noise *= effectMask.y;
 
   // Map noise value to color.
-  vec4 fire = getFireColor(noise);
+  vec4 fire = vec4(0.0);
+  
+  if (uRandomColor)
+  {
+    vec3 baseColor0 = offsetHue(vec3(1.0,0.0,0.0), hash11(uSeed));
+    vec3 baseColor1 = offsetHue(baseColor0, 0.1);
+    vec3 baseColor2 = offsetHue(baseColor1, 0.1);
+
+    //hardcoding alpha values
+    vec4 c0 = vec4(baseColor0,0.0);
+    vec4 c1 = vec4(baseColor0,0.3);
+    vec4 c2 = vec4(baseColor1,0.6);
+    vec4 c3 = vec4(baseColor1,0.9);
+    vec4 c4 = vec4(baseColor2,1.0);
+
+
+    fire = getFireColorV2(noise,c0,c1,c2,c3,c4);
+  }
+  else
+  {
+    fire = getFireColor(noise);
+  }
 
   // Get the window texture.
   vec4 oColor = getInputColor(iTexCoord.st);
@@ -131,4 +186,4 @@ void main() {
   // oColor = vec4(vec3(effectMask.y), 1);
 
   setOutputColor(oColor);
-}
+}