static public IEnumerable <Vector3> GetTriangleIntersection(this Bounds item, Triangle3 triangle)
{
if (triangle.IsDegenerate() == false)
{
Plane plane = triangle.GetPlane();
if (plane.normal != Vector3.zero)
{
if (item.FullyContains(triangle))
{
return(triangle.GetPoints());
}
PlaneSpace plane_space = plane.GetPlaneSpace();
ConvexPolygon plane_polygon = new ConvexPolygon(
plane_space.ProjectPoints(item.GetPlaneIntersection(plane))
);
ConvexPolygon triangle_polygon = new ConvexPolygon(
plane_space.ProjectPoints(triangle.GetPoints())
);
return(plane_space.InflatePoints(
plane_polygon.GetIntersection(triangle_polygon).GetVertexs()
).Narrow(p => item.Contains(p)));
}
}
return(Empty.IEnumerable <Vector3>());
}
static public IEnumerable <LineSegment3> GetEdges(this Triangle3 item)
{
return(item.GetPoints().CloseLoop().Connect());
}
static public Vector3 GetCenter(this Triangle3 item)
{
return(item.GetPoints().Average());
}
static public Bounds GetBounds(this Triangle3 item)
{
return(BoundsExtensions.CreateWithPoints(item.GetPoints()));
}