1 files changed, 0 insertions, 60 deletions
diff --git a/examples/web/shaders/shaders_eratosthenes.data b/examples/web/shaders/shaders_eratosthenes.data
deleted file mode 100644
index ba6de89..0000000
--- a/examples/web/shaders/shaders_eratosthenes.data
+++ /dev/null
@@ -1,60 +0,0 @@
-#version 100
-
-precision mediump float;
-
-/*************************************************************************************
-
-  The Sieve of Eratosthenes -- a simple shader by ProfJski
-  An early prime number sieve: https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes
-
-  The screen is divided into a square grid of boxes, each representing an integer value.
-  Each integer is tested to see if it is a prime number.  Primes are colored white.
-  Non-primes are colored with a color that indicates the smallest factor which evenly divdes our integer.
-
-  You can change the scale variable to make a larger or smaller grid.  
-  Total number of integers displayed = scale squared, so scale = 100 tests the first 10,000 integers.
-
-  WARNING: If you make scale too large, your GPU may bog down!
-
-***************************************************************************************/
-
-// Input vertex attributes (from vertex shader)
-varying vec2 fragTexCoord;
-varying vec4 fragColor;
-
-// Make a nice spectrum of colors based on counter and maxSize
-vec4 Colorizer(float counter, float maxSize)
-{
-    float red = 0.0, green = 0.0, blue = 0.0;
-    float normsize = counter/maxSize;
-    
-    red = smoothstep(0.3, 0.7, normsize);
-    green = sin(3.14159*normsize);
-    blue = 1.0 - smoothstep(0.0, 0.4, normsize);
-    
-    return vec4(0.8*red, 0.8*green, 0.8*blue, 1.0);
-}
-
-void main()
-{
-    vec4 color = vec4(1.0);
-    float scale = 1000.0; // Makes 100x100 square grid. Change this variable to make a smaller or larger grid.
-    float value = scale*floor(fragTexCoord.y*scale) + floor(fragTexCoord.x*scale);  // Group pixels into boxes representing integer values
-    int valuei = int(value);
-    
-    //if ((valuei == 0) || (valuei == 1) || (valuei == 2)) gl_FragColor = vec4(1.0);
-    //else
-    {
-        //for (int i = 2; (i < int(max(2.0, sqrt(value) + 1.0))); i++)
-        // NOTE: On GLSL 100 for loops are restricted and loop condition must be a constant
-        // Tested on RPI, it seems loops are limited around 60 iteractions
-        for (int i = 2; i < 48; i++)
-        {
-            if ((value - float(i)*floor(value/float(i))) <= 0.0)
-            {
-                gl_FragColor = Colorizer(float(i), scale);
-                //break;    // Uncomment to color by the largest factor instead
-            }
-        }
-    }
-}