color_diff function

2022-09-17 12:09:46 +02:00 · 2022-09-17 12:09:46 +02:00 · f0200ee32c
parent 85f214c9a2
commit f0200ee32c
1 changed files with 7 additions and 0 deletions
--- a/basegraph.cpp
+++ b/basegraph.cpp
@ -915,6 +915,13 @@ EX color_t colormix(color_t a, color_t b, color_t c) {
  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 ld realradius() {