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color_diff function

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Zeno Rogue
2022-09-17 12:09:46 +02:00
parent 85f214c9a2
commit f0200ee32c
1 changed files with 7 additions and 0 deletions
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7
basegraph.cpp
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@@ -915,6 +915,13 @@ EX color_t colormix(color_t a, color_t b, color_t c) {
return a; return a;
} }
/* color difference for 24-bit colors, from 0 to 255*3 */
EX int color_diff(color_t a, color_t b) {
int res = 0;
for(int i=0; i<3; i++) res += abs(part(a, i) - part(b, i));
return res;
}
EX int rhypot(int a, int b) { return (int) sqrt(a*a - b*b); } EX int rhypot(int a, int b) { return (int) sqrt(a*a - b*b); }
EX ld realradius() { EX ld realradius() {