changed vert to the glsl tutorial one

android/assets/shaders/bg_frag.glsl

@@ -2,7 +2,6 @@
 precision mediump float;
 #endif
 
-
 uniform float time;
 uniform vec2 mouse;
 uniform vec2 resolution;

android/assets/shaders/bg_vert.glsl

@@ -4,9 +4,11 @@ attribute vec2 a_texCoord0;
 
 uniform mat4 u_projTrans;
 
+varying vec4 vColor;
 varying vec2 vTexCoord;
-void main() {
-	vTexCoord = a_texCoord0;
 
+void main() {
+	vColor = a_color;
+	vTexCoord = a_texCoord0;
 	gl_Position = u_projTrans * a_position;
 }

android/assets/shaders/glow_frag.glsl

@@ -1,33 +1,37 @@
+#ifdef GL_ES
+#define LOWP lowp
+    precision mediump float;
+#else
+    #define LOWP
+#endif
+varying LOWP vec4 vColor;
+varying vec2 vTexCoord;
+
 uniform sampler2D u_texture;
+uniform float resolution;
+uniform float radius;
+uniform vec2 dir;
 
-uniform vec2 vTexCoord;
-void main()
-{
-   vec4 sum = vec4(0);
-   vec2 texcoord = vTexCoord;
-   int j;
-   int i;
+void main() {
 
-   for( i= -4 ;i < 4; i++)
-   {
-        for (j = -3; j < 3; j++)
-        {
-            sum += texture2D(u_texture, texcoord + vec2(j, i)*0.004) * 0.25;
-        }
-   }
-       if (texture2D(u_texture, texcoord).r < 0.3)
-    {
-       gl_FragColor = sum*sum*0.012 + texture2D(u_texture, texcoord);
-    }
-    else
-    {
-        if (texture2D(u_texture, texcoord).r < 0.5)
-        {
-            gl_FragColor = sum*sum*0.009 + texture2D(u_texture, texcoord);
-        }
-        else
-        {
-            gl_FragColor = sum*sum*0.0075 + texture2D(u_texture, texcoord);
-        }
-    }
+	vec4 sum = vec4(0.0);
+	vec2 tc = vTexCoord;
+	float blur = radius/resolution;
+
+	float hstep = dir.x;
+	float vstep = dir.y;
+
+	sum += texture2D(u_texture, vec2(tc.x - 4.0*blur*hstep, tc.y - 4.0*blur*vstep)) * 0.05;
+	sum += texture2D(u_texture, vec2(tc.x - 3.0*blur*hstep, tc.y - 3.0*blur*vstep)) * 0.09;
+	sum += texture2D(u_texture, vec2(tc.x - 2.0*blur*hstep, tc.y - 2.0*blur*vstep)) * 0.12;
+	sum += texture2D(u_texture, vec2(tc.x - 1.0*blur*hstep, tc.y - 1.0*blur*vstep)) * 0.15;
+
+	sum += texture2D(u_texture, vec2(tc.x, tc.y)) * 0.16;
+
+	sum += texture2D(u_texture, vec2(tc.x + 1.0*blur*hstep, tc.y + 1.0*blur*vstep)) * 0.15;
+	sum += texture2D(u_texture, vec2(tc.x + 2.0*blur*hstep, tc.y + 2.0*blur*vstep)) * 0.12;
+	sum += texture2D(u_texture, vec2(tc.x + 3.0*blur*hstep, tc.y + 3.0*blur*vstep)) * 0.09;
+	sum += texture2D(u_texture, vec2(tc.x + 4.0*blur*hstep, tc.y + 4.0*blur*vstep)) * 0.05;
+
+	gl_FragColor = vColor * vec4(sum.rgb, 1.0);
 }

android/assets/shaders/glow_vert.glsl

@@ -4,9 +4,11 @@ attribute vec2 a_texCoord0;
 
 uniform mat4 u_projTrans;
 
+varying vec4 vColor;
 varying vec2 vTexCoord;
-void main() {
-	vTexCoord = a_texCoord0;
 
+void main() {
+	vColor = a_color;
+	vTexCoord = a_texCoord0;
 	gl_Position = u_projTrans * a_position;
 }