glslsandbox-ios

Overview

Native iOS implementation of glslsandbox, using GPUImage.

You can run most Fragment Shader copied from glslsandox or ShaderToy without modification or just a little modification.

Add new Fragment Shader

1. copy fragment shader source code from glslsandbox
2. create a new fragment shader source file under FragmentShader folder, then past code copied from last step. If you copy shader from ShaderToy, you need to modify the file.

    // add below lines at begining
    #ifdef GL_ES
    precision mediump float;
    #endif
    uniform float time;
    uniform vec3 mouse;
    uniform vec2 resolution;
    // shadertoy emulation
    #define iTime time
    #define iResolution resolution
    #define iMouse mouse
   
    // add below lines at end
    // --------[ Original ShaderToy ends here ]---------- //
   void main(void)
   {
       mainImage(gl_FragColor, gl_FragCoord.xy);
   }

3. in GLSLSandboxListViewController.m file, add the fragment shader source file name to the sandboxDemosList.
4. run the project you will find the new demo in the demo list.

Demo Snapshot