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author | Pushkar Joshi | 2012-02-24 12:08:49 -0800 |
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committer | Pushkar Joshi | 2012-02-24 12:08:49 -0800 |
commit | 03ca7a5ed13c25faaa9100bb666e062fd15335e6 (patch) | |
tree | c51112223ceb9121cd595a60335eb2795215590f /assets/shaders/Mandel.frag.glsl | |
parent | fcb12cc09eb3cd3b42bd215877ba18f449275b75 (diff) | |
parent | 053fc63a2950c7a5ee4ebf98033b64d474a3c46e (diff) | |
download | ninja-03ca7a5ed13c25faaa9100bb666e062fd15335e6.tar.gz |
Merge branch 'pentool' into brushtool
Conflicts:
imports/codemirror/mode/scheme/scheme.js
js/tools/BrushTool.js
Diffstat (limited to 'assets/shaders/Mandel.frag.glsl')
-rw-r--r-- | assets/shaders/Mandel.frag.glsl | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/assets/shaders/Mandel.frag.glsl b/assets/shaders/Mandel.frag.glsl new file mode 100644 index 00000000..6465899d --- /dev/null +++ b/assets/shaders/Mandel.frag.glsl | |||
@@ -0,0 +1,55 @@ | |||
1 | #ifdef GL_ES | ||
2 | precision highp float; | ||
3 | #endif | ||
4 | |||
5 | uniform vec2 u_resolution; | ||
6 | uniform float u_time; | ||
7 | |||
8 | void main(void) | ||
9 | { | ||
10 | vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / u_resolution.xy; | ||
11 | p.x *= u_resolution.x/u_resolution.y; | ||
12 | |||
13 | float zoo = .62+.38*sin(.1*u_time); | ||
14 | float coa = cos( 0.1*(1.0-zoo)*u_time ); | ||
15 | float sia = sin( 0.1*(1.0-zoo)*u_time ); | ||
16 | zoo = pow( zoo,8.0); | ||
17 | vec2 xy = vec2( p.x*coa-p.y*sia, p.x*sia+p.y*coa); | ||
18 | vec2 cc = vec2(-.745,.186) + xy*zoo; | ||
19 | |||
20 | vec2 z = vec2(0.0); | ||
21 | vec2 z2 = z*z; | ||
22 | float m2; | ||
23 | float co = 0.0; | ||
24 | |||
25 | |||
26 | // chrome/angelproject/nvidia/glslES don't seem to like to "break" a loop... | ||
27 | // so we have to rewrite it in another way | ||
28 | /* | ||
29 | for( int i=0; i<256; i++ ) | ||
30 | { | ||
31 | z = cc + vec2( z.x*z.x - z.y*z.y, 2.0*z.x*z.y ); | ||
32 | m2 = dot(z,z); | ||
33 | if( m2>1024.0 ) break; | ||
34 | co += 1.0; | ||
35 | } | ||
36 | */ | ||
37 | |||
38 | for( int i=0; i<256; i++ ) | ||
39 | { | ||
40 | if( m2<1024.0 ) | ||
41 | { | ||
42 | z = cc + vec2( z.x*z.x - z.y*z.y, 2.0*z.x*z.y ); | ||
43 | m2 = dot(z,z); | ||
44 | co += 1.0; | ||
45 | } | ||
46 | } | ||
47 | |||
48 | co = co + 1.0 - log2(.5*log2(m2)); | ||
49 | |||
50 | co = sqrt(co/256.0); | ||
51 | gl_FragColor = vec4( .5+.5*cos(6.2831*co+0.0), | ||
52 | .5+.5*cos(6.2831*co+0.4), | ||
53 | .5+.5*cos(6.2831*co+0.7), | ||
54 | 1.0 ); | ||
55 | } \ No newline at end of file | ||