31 lines
632 B
Text
31 lines
632 B
Text
#version 110
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varying vec4 TexCoord0;
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void main(void) {
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gl_Position = ftransform();
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gl_FrontColor = gl_Color;
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TexCoord0 = gl_TextureMatrix[0] * gl_MultiTexCoord0;
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}
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%% -- FRAG
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#version 110
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#define PI 3.1415926535897932384626433832795
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uniform sampler2D tex;
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uniform float fill;
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uniform float tcfactor;
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uniform vec4 fill_color;
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uniform vec4 back_color;
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varying vec4 TexCoord0;
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void main(void) {
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vec2 tc = TexCoord0.xy;
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vec4 texel = texture2D(tex, tc);
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tc *= tcfactor;
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tc -= vec2(0.5);
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texel *= mix(back_color, fill_color, float(atan(tc.x,-tc.y) < PI*(2.0*fill-1.0)));
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gl_FragColor = texel;
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}
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