24 lines
729 B
GLSL
24 lines
729 B
GLSL
// Example Shadertoy-style fragment shader for gpupaper.
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// Demonstrates use of 'time' and 'resolution' uniforms.
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//
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// Usage: gpupaper HDMI-A-1 shaders/example.frag
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uniform vec2 resolution;
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uniform float time;
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void mainImage(out vec4 fragColor, in vec2 fragCoord) {
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vec2 uv = fragCoord / resolution;
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// Animated gradient
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float r = 0.5 + 0.5 * sin(time * 0.7 + uv.x * 3.0);
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float g = 0.5 + 0.5 * sin(time * 0.5 + uv.y * 3.0 + 2.094);
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float b = 0.5 + 0.5 * sin(time * 0.3 + (uv.x + uv.y) * 3.0 + 4.189);
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// Vignette
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vec2 centered = uv - 0.5;
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float vignette = 1.0 - dot(centered, centered) * 2.0;
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vignette = clamp(vignette, 0.0, 1.0);
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fragColor = vec4(vec3(r, g, b) * vignette, 1.0);
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}
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