Merge pull request #26 from pushkarjoshi/pentool

Pentool

1 files changed, 51 insertions, 0 deletions

diff --git a/assets/shaders/radialGradient.frag.glsl b/assets/shaders/radialGradient.frag.glsl
new file mode 100644
index 00000000..cd751750
--- /dev/null
+++ b/assets/shaders/radialGradient.frag.glsl
@@ -0,0 +1,51 @@
+/* <copyright>
+This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
+No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
+(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
+</copyright> */
+
+#ifdef GL_ES
+precision highp float;
+#endif
+
+uniform vec4    u_color1;                                                                       
+uniform vec4    u_color2;                                                                       
+uniform vec4    u_color3;                                                                       
+uniform vec4    u_color4;                                                                       
+uniform float   u_colorStop1;                                                                   
+uniform float   u_colorStop2;                                                                   
+uniform float   u_colorStop3;                                                                   
+uniform float   u_colorStop4;                                                                   
+uniform vec2    u_cos_sin_angle;
+//uniform int           u_colorCount;   // currently using all 4
+        
+varying vec2    v_uv;
+
+void main(void)
+{
+        vec2 pt = vec2( v_uv.x - 0.5,  v_uv.y - 0.5);
+        float t = sqrt( dot(pt, pt) );
+
+        vec4 color;
+        if (t < u_colorStop1)
+                color = u_color1;
+        else if (t < u_colorStop2)
+        {
+                float tLocal = (t - u_colorStop1)/(u_colorStop2 - u_colorStop1);
+                color = mix(u_color1,u_color2,tLocal);
+        }
+        else if (t < u_colorStop3)
+        {
+                float tLocal = (t - u_colorStop2)/(u_colorStop3 - u_colorStop2);
+                color = mix(u_color2,u_color3,tLocal);
+        }
+        else if (t < u_colorStop4)
+        {
+                float tLocal = (t - u_colorStop3)/(u_colorStop4 - u_colorStop3);
+                color = mix(u_color3,u_color4,tLocal);
+        }
+        else
+                color = u_color4;
+
+        gl_FragColor = color;
+}