1 files changed, 30 insertions, 0 deletions
diff --git a/shaders/glsl100/predator.fs b/shaders/glsl100/predator.fs
new file mode 100644
index 00000000..1f0e2ce5
--- /dev/null
+++ b/shaders/glsl100/predator.fs
@@ -0,0 +1,30 @@
+#version 100
+
+precision mediump float;
+
+// Input vertex attributes (from vertex shader)
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 fragTintColor;
+
+// NOTE: Add here your custom variables
+
+void main() 
+{ 
+    vec3 color = texture2D(texture0, fragTexCoord).rgb;
+    vec3 colors[3];
+    colors[0] = vec3(0.0, 0.0, 1.0);
+    colors[1] = vec3(1.0, 1.0, 0.0);
+    colors[2] = vec3(1.0, 0.0, 0.0);
+    
+    float lum = (color.r + color.g + color.b)/3.0;
+    
+    int ix = (lum < 0.5)? 0:1;
+    
+    vec3 tc = mix(colors[ix], colors[ix+1], (lum-float(ix)*0.5)/0.5);
+    
+    gl_FragColor = vec4(tc, 1.0);
+}
+\ No newline at end of file