diff options
Diffstat (limited to 'assets/shaders')
-rw-r--r-- | assets/shaders/radialBlur.frag.glsl | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/assets/shaders/radialBlur.frag.glsl b/assets/shaders/radialBlur.frag.glsl new file mode 100644 index 00000000..953e6f07 --- /dev/null +++ b/assets/shaders/radialBlur.frag.glsl | |||
@@ -0,0 +1,75 @@ | |||
1 | |||
2 | /* <copyright> | ||
3 | Copyright (c) 2012, Motorola Mobility LLC. | ||
4 | All Rights Reserved. | ||
5 | |||
6 | Redistribution and use in source and binary forms, with or without | ||
7 | modification, are permitted provided that the following conditions are met: | ||
8 | |||
9 | * Redistributions of source code must retain the above copyright notice, | ||
10 | this list of conditions and the following disclaimer. | ||
11 | |||
12 | * Redistributions in binary form must reproduce the above copyright notice, | ||
13 | this list of conditions and the following disclaimer in the documentation | ||
14 | and/or other materials provided with the distribution. | ||
15 | |||
16 | * Neither the name of Motorola Mobility LLC nor the names of its | ||
17 | contributors may be used to endorse or promote products derived from this | ||
18 | software without specific prior written permission. | ||
19 | |||
20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
21 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
22 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
23 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | ||
24 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
25 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
26 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
27 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
28 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
29 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
30 | POSSIBILITY OF SUCH DAMAGE. | ||
31 | </copyright> */ | ||
32 | |||
33 | #ifdef GL_ES | ||
34 | precision highp float; | ||
35 | #endif | ||
36 | |||
37 | uniform vec2 u_resolution; | ||
38 | uniform float u_time; | ||
39 | uniform float u_speed; | ||
40 | uniform sampler2D u_tex0; | ||
41 | |||
42 | |||
43 | void main(void) | ||
44 | { | ||
45 | vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / u_resolution.xy; | ||
46 | vec2 s = p; | ||
47 | |||
48 | float time = u_time * u_speed; | ||
49 | float c1 = 1.1*time, c2 = 1.2*time, c3 = 0.6+1.1*time; | ||
50 | float sc3 = sin(c3), st = sin(time); | ||
51 | |||
52 | const float iterCount = 40.0; | ||
53 | const int iIterCount = int( iterCount ); | ||
54 | |||
55 | vec3 sum = vec3(0.0); | ||
56 | vec2 delta = -p/iterCount; | ||
57 | vec2 uv; | ||
58 | for( int i=0; i<iIterCount; i++ ) | ||
59 | { | ||
60 | vec2 q = vec2( sin(c1 + s.x), sin(c2 + s.y) ); | ||
61 | float a = atan(q.y,q.x); | ||
62 | float rsq = abs(dot(q,q)) + 1.0; | ||
63 | uv.x = st + s.x*rsq; | ||
64 | uv.y = sc3 + s.y*rsq; | ||
65 | vec3 res = texture2D(u_tex0, uv*.5).xyz; | ||
66 | |||
67 | res = smoothstep(0.1,1.0,res*res); | ||
68 | sum += res; | ||
69 | s += delta; | ||
70 | } | ||
71 | sum /= iterCount; | ||
72 | float r = 1.5/(1.0+dot(p,p)); | ||
73 | |||
74 | gl_FragColor = vec4( sum*r, 1.0); | ||
75 | } \ No newline at end of file | ||