1 files changed, 25 insertions, 5 deletions
diff --git a/resources/shaders/foam.frag b/resources/shaders/foam.frag
index 86403d8..91ce3b9 100644
--- a/resources/shaders/foam.frag
+++ b/resources/shaders/foam.frag
@@ -1,22 +1,27 @@
 #version 330 core
 
-in vec4 saturation_const;
+in vec2 constants;
 in vec2 dir;
 in vec2 tex;
 in vec3 pos;
 
 
 uniform float time;
+uniform float phaseC; // phase constant
+
 uniform sampler2D halftone_texture;
+uniform sampler2D foam_texture;
+
 uniform vec2 widthBounds;
 uniform vec2 lengthBounds;
 
 out vec4 fragColor;
 
 float getSaturation(vec2 k, vec2 xzPos, float adjWaveLength, float phaseC){
+    //k = normalize(k);
     float result = dot(k, xzPos) * 3.14f / adjWaveLength;
     result = result + phaseC*time*.5f;
-    result = -tan(result) + 1.57f;
+    result = -tan(result + 1.57f);
     result = exp(result) / 4.f;
 
     return result;
@@ -26,8 +31,23 @@ float getSaturation(vec2 k, vec2 xzPos, float adjWaveLength, float phaseC){
 
 
 void main() {
-   //float saturation = getSaturation(saturation_const[0], saturation_const[1],saturation_const[2],saturation_const[3]);
-   vec4 color = texture(halftone_texture, tex);
+    float height = pos.y;
+   float saturation = getSaturation(dir, vec2(pos.x,pos.z), 100.f, constants[0]);
+   vec4 m_uv = texture(halftone_texture, tex);
+   float m_threshold = m_uv.r * m_uv.g * m_uv.b;
+
+   // final rgba color at x,z pos
+   vec4 h = vec4(0,0,1,1);
+   if (saturation > m_threshold) h = vec4(vec3(m_threshold), 1);
+
+   // add fading effect to bubble popping
+   vec4 g = clamp(.5*saturation - m_threshold, 0, 1) * h;
+
+   // apply foam texture
+   vec4 foam = texture(foam_texture, tex);
+   vec4 j = vec4(0,0,0,1);
+   if (saturation > m_threshold) j = vec4(vec3(g*foam), 1);
+
 
-   fragColor = vec4(vec3(color), 1);
+   fragColor = vec4(vec3(saturation), 1);
 }