39 lines
1.0 KiB
GLSL
39 lines
1.0 KiB
GLSL
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#version 330
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in vec2 fragCoord;
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out vec4 fragColor;
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// bar values. defaults to left channels first (low to high), then right (high to low).
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uniform float bars[512];
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uniform int bars_count; // number of bars (left + right) (configurable)
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uniform vec3 u_resolution; // window resolution, not used here
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//colors, configurable in cava config file
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uniform vec3 bg_color; // background color(r,g,b) (0.0 - 1.0), not used here
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uniform vec3 fg_color; // foreground color, not used here
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float normalize_C(float x, float x_min, float x_max, float r_min, float r_max )
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{
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float xr;
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xr = (r_max-r_min) * (x - x_min) / (x_max - x_min) + r_min;
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return xr;
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}
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void main()
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{
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// find which bar to use based on where we are on the x axis
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int bar = int(bars_count * fragCoord.x);
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// create a normal along the y axis based on the bar height
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float x = normalize_C(fragCoord.y, 1.0, 0.0, 0.0, bars[bar]);
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// set color
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fragColor.r=fg_color.x*x;
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fragColor.g=fg_color.y*x;
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fragColor.b=fg_color.z*x;
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fragColor.a=1.0;
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}
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