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This commit is contained in:
Josh Deprez 2021-09-09 10:17:33 +10:00
parent d3527d192f
commit e11f199d53
1 changed files with 3 additions and 1 deletions
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4
geom/polygon.go
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@ -2,7 +2,9 @@ package geom
import "image" import "image"
// PolygonContains reports if a polygon contains a point // PolygonContains reports if a polygon contains a point. The polygon must be in
// clockwise order if +Y is pointing upwards, or anticlockwise if +Y is pointing
// downwards.
func PolygonContains(polygon []image.Point, p image.Point) bool { func PolygonContains(polygon []image.Point, p image.Point) bool {
for i, q := range polygon { for i, q := range polygon {
r := polygon[(i+1)%len(polygon)] r := polygon[(i+1)%len(polygon)]