diegoripley/tippecanoe
1
0
Fork 0
mirror of https://github.com/felt/tippecanoe.git synced 2026-10-02 16:35:40 +02:00
Code Issues Packages Projects Releases Wiki Activity

Bringing back reverted overflow changes, one at a time

Browse Source
This commit is contained in:
Erica Fischer
2024-03-18 12:37:24 -07:00
parent cf63945c37
commit 686ab56c4a
4 changed files with 12 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
clip.cpp
+5 -5
View File
@@ -177,7 +177,7 @@ int clip(long long *x0, long long *y0, long long *x1, long long *y1, long long x
} else {
// failed both tests, so calculate the line segment to clip
// from an outside point to an intersection with clip edge
long long x = *x0, y = *y0;
__int128 x = *x0, y = *y0;
// At least one endpoint is outside the clip rectangle; pick it.
int outcodeOut = outcode0 ? outcode0 : outcode1;
@@ -187,16 +187,16 @@ int clip(long long *x0, long long *y0, long long *x1, long long *y1, long long x
// Now find the intersection point;
// use formulas y = y0 + slope * (x - x0), x = x0 + (1 / slope) * (y - y0)
if (outcodeOut & TOP) { // point is above the clip rectangle
x = *x0 + (*x1 - *x0) * (ymax - *y0) / (*y1 - *y0);
x = *x0 + (__int128) (*x1 - *x0) * (ymax - *y0) / (*y1 - *y0);
y = ymax;
} else if (outcodeOut & BOTTOM) { // point is below the clip rectangle
x = *x0 + (*x1 - *x0) * (ymin - *y0) / (*y1 - *y0);
x = *x0 + (__int128) (*x1 - *x0) * (ymin - *y0) / (*y1 - *y0);
y = ymin;
} else if (outcodeOut & RIGHT) { // point is to the right of clip rectangle
y = *y0 + (*y1 - *y0) * (xmax - *x0) / (*x1 - *x0);
y = *y0 + (__int128) (*y1 - *y0) * (xmax - *x0) / (*x1 - *x0);
x = xmax;
} else if (outcodeOut & LEFT) { // point is to the left of clip rectangle
y = *y0 + (*y1 - *y0) * (xmin - *x0) / (*x1 - *x0);
y = *y0 + (__int128) (*y1 - *y0) * (xmin - *x0) / (*x1 - *x0);
x = xmin;
}