51 lines
1.0 KiB
Awk
51 lines
1.0 KiB
Awk
#!/usr/bin/awk -f
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BEGIN {
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pi = atan2(0, -1);
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test_true_color();
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}
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function test_true_color() {
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for (y = 0; y < HEIGHT; y++) {
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for (x = 0; x < WIDTH; x++) {
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angle = pi - atan2(x + 0.5 - WIDTH/2, y + 0.5 - HEIGHT/2);
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hsv2rgb(angle / (2*pi), 1, 1, rgb);
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for (i = 0; i < 3; i++) rgb[i] = int(rgb[i] * 255);
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r = rgb[0];
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g = rgb[1];
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b = rgb[2];
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printf "\033[48;2;%d;%d;%dm", r,g,b;
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printf " \033[0m";
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}
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print "";
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}
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}
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function hsv2rgb(h, s, v, rgb) {
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if (s == 0) {
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r = g = b = v;
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} else {
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h *= 6;
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i = int(h);
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f = h - i;
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p = v * (1 - s);
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q = v * (1 - s * f);
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t = v * (1 - s * (1 - f));
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if (i == 0) {
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r = v; g = t; b = p;
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} else if (i == 1) {
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r = q; g = v; b = p;
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} else if (i == 2) {
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r = p; g = v; b = t;
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} else if (i == 3) {
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r = p; g = q; b = v;
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} else if (i == 4) {
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r = t; g = p; b = v;
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} else if (i == 5) {
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r = v; g = p; b = q;
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}
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}
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rgb[0] = r; rgb[1] = g; rgb[2] = b;
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}
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