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https://github.com/italicsjenga/slang-shaders.git
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20 lines
543 B
C++
20 lines
543 B
C++
vec3 col = texture(Source, vTexCoord).rgb;
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vec3 yiq = rgb2yiq(col);
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#if defined(TWO_PHASE)
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float chroma_phase = PI * (mod(pix_no.y, 2.0) + global.FrameCount);
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#elif defined(THREE_PHASE)
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float chroma_phase = 0.6667 * PI * (mod(pix_no.y, 3.0) + global.FrameCount);
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#endif
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float mod_phase = chroma_phase + pix_no.x * CHROMA_MOD_FREQ;
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float i_mod = cos(mod_phase);
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float q_mod = sin(mod_phase);
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yiq.yz *= vec2(i_mod, q_mod); // Modulate.
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yiq *= mix_mat; // Cross-talk.
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yiq.yz *= vec2(i_mod, q_mod); // Demodulate.
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FragColor = vec4(yiq, 1.0);
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