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Stay in integers in line simplification

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This commit is contained in:
Erica Fischer
2023-09-07 16:36:08 -07:00
parent 92561f5a90
commit 6551b2cc0e
70 changed files with 5551 additions and 5306 deletions
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geometry.cpp
+7 -6
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@@ -1005,19 +1005,20 @@ drawvec clip_lines(drawvec &geom, long long minx, long long miny, long long maxx
// @@@
static long long square_distance_from_line(long long point_x, long long point_y, long long segA_x, long long segA_y, long long segB_x, long long segB_y) {
const long long scale = 1024;
long long p2x = segB_x - segA_x;
long long p2y = segB_y - segA_y;
double something = p2x * p2x + p2y * p2y;
double u = 0 == something ? 0 : ((point_x - segA_x) * p2x + (point_y - segA_y) * p2y) / something;
long long something = p2x * p2x + p2y * p2y;
long long u = 0 == something ? 0 : ((point_x - segA_x) * p2x + (point_y - segA_y) * p2y) * scale / something;
if (u > 1) {
u = 1;
if (u > scale) {
u = scale;
} else if (u < 0) {
u = 0;
}
long long x = std::round(segA_x + u * p2x);
long long y = std::round(segA_y + u * p2y);
long long x = std::round(segA_x + u * p2x / scale);
long long y = std::round(segA_y + u * p2y / scale);
long long dx = x - point_x;
long long dy = y - point_y;