76 lines
2.5 KiB
GLSL
76 lines
2.5 KiB
GLSL
layout(pixel_center_integer) in vec4 gl_FragCoord;
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#request uniform "screen" screen
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uniform ivec2 screen;
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#request uniform "audio_sz" audio_sz
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uniform int audio_sz;
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#request setavgframes 6
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#request setavgwindow true
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#request setgravitystep 5.2
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#request uniform "audio_l" audio_l
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#request transform audio_l "window"
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#request transform audio_l "fft"
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#request transform audio_l "gravity"
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#request transform audio_l "avg"
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uniform sampler1D audio_l;
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#request uniform "audio_r" audio_r
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#request transform audio_r "window"
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#request transform audio_r "fft"
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#request transform audio_r "gravity"
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#request transform audio_r "avg"
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uniform sampler1D audio_r;
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out vec4 fragment;
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#include "../radial.glsl"
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#define TWOPI 6.28318530718
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#define PI 3.14159265359
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void main() {
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float /* translate (x, y) to use (0, 0) as the center of the screen */
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dx = gl_FragCoord.x - (screen.x / 2),
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dy = (screen.y / 2) - gl_FragCoord.y;
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float theta = atan(dy, dx); /* fragment angle with the center of the screen as the origin */
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float d = sqrt((dx * dx) + (dy * dy)); /* distance */
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if (d > C_RADIUS - (float(C_LINE) / 2F) && d < C_RADIUS + (float(C_LINE) / 2F)) {
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fragment = OUTLINE;
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return;
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} else if (d > C_RADIUS) {
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float section = (TWOPI / NBARS); /* range (radians) for each bar */
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float m = mod(theta, section); /* position in section (radians) */
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float center = ((TWOPI / NBARS) / 2F); /* center line angle */
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float ym = d * sin(center - m); /* distance from center line (cartesian coords) */
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if (abs(ym) < BAR_WIDTH / 2) { /* if within width, draw audio */
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/* texture lookup */
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float v = texture(theta > 0 ? audio_l : audio_r,
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log(int(abs(theta) / section) / float(NBARS / 2)) / WSCALE).r * AMPLIFY;
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d -= C_RADIUS + (float(C_LINE) / 2F); /* offset to fragment distance from inner circle */
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if (d <= v - BAR_OUTLINE_WIDTH) {
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#if BAR_OUTLINE_WIDTH > 0
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if (abs(ym) < (BAR_WIDTH / 2) - BAR_OUTLINE_WIDTH)
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fragment = COLOR;
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else
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fragment = BAR_OUTLINE;
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#else
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fragment = COLOR;
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#endif
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return;
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}
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#if BAR_OUTLINE_WIDTH > 0
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if (d <= v) {
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fragment = BAR_OUTLINE;
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return;
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}
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#endif
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}
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}
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fragment = vec4(0, 0, 0, 0); /* default frag color */
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}
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