From 96a0a8c916533eb5625816192ed38488f639326d Mon Sep 17 00:00:00 2001 From: Nivesh Rajbhandari Date: Wed, 22 Feb 2012 11:00:20 -0800 Subject: Integrating canvas-2d drawing and WebGL fixes, including adding back WebGL materials. Signed-off-by: Nivesh Rajbhandari --- assets/shaders/Julia.frag.glsl | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 assets/shaders/Julia.frag.glsl (limited to 'assets/shaders/Julia.frag.glsl') diff --git a/assets/shaders/Julia.frag.glsl b/assets/shaders/Julia.frag.glsl new file mode 100644 index 00000000..68cda703 --- /dev/null +++ b/assets/shaders/Julia.frag.glsl @@ -0,0 +1,25 @@ +#ifdef GL_ES +precision highp float; +#endif + +uniform vec2 u_resolution; +uniform float u_time; + +void main(void) +{ + vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / u_resolution.xy; + vec2 cc = vec2( cos(.25*u_time), sin(.25*u_time*1.423) ); + + float dmin = 1000.0; + vec2 z = p*vec2(1.33,1.0); + for( int i=0; i<64; i++ ) + { + z = cc + vec2( z.x*z.x - z.y*z.y, 2.0*z.x*z.y ); + float m2 = dot(z,z); + if( m2>100.0 ) break; + dmin=min(dmin,m2); + } + + float color = sqrt(sqrt(dmin))*0.7; + gl_FragColor = vec4(color,color,color,1.0); +} \ No newline at end of file -- cgit v1.2.3