15 lines
498 B
GLSL
15 lines
498 B
GLSL
uniform float intensity = 1.0;
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void mainImage( out vec4 fragColor, in vec2 fragCoord ) {
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vec2 uv = fragCoord.xy / iResolution.xy;
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vec4 src = texture(iChannel0, uv);
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vec3 color = vec3(
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dot(src.rgb, vec3(0.393 * intensity, 0.769 * intensity, 0.189 * intensity)),
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dot(src.rgb, vec3(0.349 * intensity, 0.686 * intensity, 0.168 * intensity)),
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dot(src.rgb, vec3(0.272 * intensity, 0.534 * intensity, 0.131 * intensity))
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);
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fragColor = vec4(color, src.a);
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}
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