ShaderToy plugin for Android
- using the same vertex_shader.glsl in Android assets folder.
- copy fragment_shader.glsl from https://www.shadertoy.com/.
- make some modifications: out, texture gl_FragCoord / iResolution.xy => gl_FragCoord.xy / iResolution.xy uniform shader iChannel0 => #iChannel0 "assets://shader/raining/raining.png"
- fix other shader compile errors.