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30 lines
473 B
GLSL
30 lines
473 B
GLSL
//1-input
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//written by Tim Caldwell
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//this is a basic example of how to effect input textures position
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#ifdef GL_ES
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precision mediump float;
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#endif
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varying vec2 v_texcoord;
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uniform sampler2D u_tex0;
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uniform vec2 u_resolution;
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uniform float u_time;
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uniform float u_x0;
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uniform float u_x1;
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void main(){
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vec2 pos = v_texcoord;
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if(pos.x > u_x0){pos.x = 1.0 - pos.x;}
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if(pos.y < u_x1){pos.y = 1.0 - pos.y;}
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vec4 color = texture2D(u_tex0, pos);
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gl_FragColor = color;
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}
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