Mercurial > gemma
diff pkg/octree/vertex.go @ 2494:a727e0426240 octree-diff
More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection.
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 04 Mar 2019 12:27:56 +0100 |
| parents | 10681749371d |
| children | 2768f74d54ab |
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--- a/pkg/octree/vertex.go Mon Mar 04 11:56:07 2019 +0100 +++ b/pkg/octree/vertex.go Mon Mar 04 12:27:56 2019 +0100 @@ -88,6 +88,17 @@ } } +func (t *Triangle) BBox() Box2D { + minX := math.Min(math.Min(t[0].X, t[1].X), t[2].X) + maxX := math.Max(math.Max(t[0].X, t[1].X), t[2].X) + minY := math.Min(math.Min(t[0].Y, t[1].Y), t[2].Y) + maxY := math.Max(math.Max(t[0].Y, t[1].Y), t[2].Y) + return Box2D{ + X1: minX, Y1: minY, + X2: maxX, Y2: maxY, + } +} + func (p Plane3D) Z(x, y float64) float64 { // p.A*x + p.B*y + p.C*z + p.D = 0 return -(p.A*x + p.B*y + p.D) / p.C