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Create Scanlines.fsh

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danyalzia 2013-10-12 21:13:30 +05:00
parent 2be4bd393a
commit feed5a2246
1 changed files with 22 additions and 0 deletions
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assets/shaders/Scanlines.fsh Normal file
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//Simple Scanlines shader
#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif
uniform sampler2D sampler0;
float offset = 1.0;
float frequency = 170.0;
varying vec2 v_texcoord0;
void main()
{
float pos0 = (v_texcoord0.y + offset) * frequency;
float pos1 = cos((fract( pos0 ) - 0.5)*3.14);
vec4 pel = texture2D( sampler0, v_texcoord0 );
gl_FragColor = mix(vec4(0,0,0,0), pel, pos1);
}