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By George, I think she's got it!

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Erica Fischer
2023-12-06 16:56:52 -08:00
parent 80c84eb88a
commit 9ae1e575ca
4 changed files with 51 additions and 28 deletions
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geometry.cpp
+23
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@@ -380,6 +380,29 @@ double distance_from_line(long long point_x, long long point_y, long long segA_x
return out;
}
double distance_from_line_noclamp(long long point_x, long long point_y, long long segA_x, long long segA_y, long long segB_x, long long segB_y, double *px, double *py) {
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);
double x = segA_x + u * p2x;
double y = segA_y + u * p2y;
if (px != NULL) {
*px = std::round(x);
}
if (py != NULL) {
*py = std::round(y);
}
double dx = x - point_x;
double dy = y - point_y;
double out = std::round(sqrt(dx * dx + dy * dy) * 16.0) / 16.0;
return out;
}
// https://github.com/Project-OSRM/osrm-backend/blob/733d1384a40f/Algorithms/DouglasePeucker.cpp
static void douglas_peucker(drawvec &geom, int start, int n, double e, size_t kept, size_t retain) {
std::stack<int> recursion_stack;