| public GetBoundingBox ( int triangleIndex, Microsoft.Xna.Framework.BoundingBox &boundingBox ) : void | ||
| triangleIndex | int | Index of the triangle in the data. |
| boundingBox | Microsoft.Xna.Framework.BoundingBox | Bounding box of the triangle. |
| return | void | |
public void GetBoundingBox(int triangleIndex, out BoundingBox boundingBox)
{
Vector3 v1, v2, v3;
GetTriangle(triangleIndex, out v1, out v2, out v3);
Vector3.Min(ref v1, ref v2, out boundingBox.Min);
Vector3.Min(ref boundingBox.Min, ref v3, out boundingBox.Min);
Vector3.Max(ref v1, ref v2, out boundingBox.Max);
Vector3.Max(ref boundingBox.Max, ref v3, out boundingBox.Max);
}
///<summary> internal override void Refit(MeshBoundingBoxTreeData data)
{
data.GetBoundingBox(LeafIndex, out BoundingBox);
//Having an ever-so-slight margin allows the hierarchy use a volume metric even for degenerate shapes (consider a flat tessellated plane).
BoundingBox.Max.X += LeafMargin;
BoundingBox.Max.Y += LeafMargin;
BoundingBox.Max.Z += LeafMargin;
BoundingBox.Min.X -= LeafMargin;
BoundingBox.Min.Y -= LeafMargin;
BoundingBox.Min.Z -= LeafMargin;
}
