1 files changed, 53 insertions, 0 deletions
diff --git a/resources/shaders/foam.frag b/resources/shaders/foam.frag
new file mode 100644
index 0000000..8d0d9bf
--- /dev/null
+++ b/resources/shaders/foam.frag
@@ -0,0 +1,53 @@
+#version 330 core
+
+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 = exp(result) / 20.f;
+
+    return result;
+
+}
+
+
+
+void main() {
+    float height = pos.y;
+   float saturation = constants[0];//getSaturation(dir, vec2(pos.x, pos.z), 200.f, constants[0]);
+   vec4 m_uv = texture(halftone_texture, tex*1);
+   float m_threshold = (m_uv.r + m_uv.g + m_uv.b) / 3;
+
+   // final rgba color at x,z pos
+   vec4 h = vec4(0,0,1,1);
+   if (saturation > m_threshold) h = vec4(1,1,1, 1);
+
+   // add fading effect to bubble popping
+   vec4 g = clamp(saturation - m_threshold, 0, 1) * h;
+
+   // apply foam texture
+   vec4 foam = texture(foam_texture, tex + time*.0003);
+   vec4 j = vec4(0,0,0,0);
+   if (saturation > m_threshold) j = g*foam*1.8;
+
+
+   fragColor = j; //vec4(vec3(g), 1);
+}