source: trunk/tools/neercs/video/noise.lolfx @ 1905

Last change on this file since 1905 was 1905, checked in by lolbot, 7 years ago

fixed 14 files out of 2200:

  • removed 0 CR characters
  • removed 12 trailing whitespaces
  • replaced 245 tabs with spaces
File size: 862 bytes
Line 
1-- GLSL.Vert --
2
3#version 120
4
5void main()
6    {
7    gl_Position=gl_Vertex;
8    gl_TexCoord[0]=gl_MultiTexCoord0;
9    }
10
11-- GLSL.Frag --
12
13#version 120
14
15uniform sampler2D texture;
16uniform vec2 screen_size;
17uniform float time;
18uniform vec2 offset;
19uniform float noise;
20uniform vec3 retrace;
21
22float rand(in vec2 p,in float t,in float v)
23    {
24    return fract(sin(dot(p+mod(t,2.0),vec2(12.9898,78.2333)))*v);
25    }
26
27void main(void)
28    {
29    vec2 p=gl_FragCoord.xy/screen_size.xy;
30
31    float r1=rand(p,time,43758.5453);
32    float r2=rand(p,time,70425.2854);
33    vec2 o=(offset-offset*2.0*r1)/screen_size;
34
35    vec3 c=texture2D(texture,p+o).xyz;                            // offset
36    c*=1.0+(noise-noise*2.0*r1);                                // noise
37    c-=retrace.x*0.01*mod(p.y*retrace.y+time*retrace.z,1.0);    // retrace
38    gl_FragColor=vec4(c,1.0);
39    }
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