/// <summary>
/// Computes a bounding box for the shape given the specified transform.
/// </summary>
/// <param name="transform">Transform to apply to the shape to compute the bounding box.</param>
/// <param name="boundingBox">Bounding box for the shape given the transform.</param>
public override void GetBoundingBox(ref RigidTransform transform, out BoundingBox boundingBox)
{
RigidTransform combinedTransform;
RigidTransform.Multiply(ref shapes.Elements[0].LocalTransform, ref transform, out combinedTransform);
shapes.Elements[0].Shape.GetBoundingBox(ref combinedTransform, out boundingBox);
for (int i = 0; i < shapes.Count; i++)
{
RigidTransform.Multiply(ref shapes.Elements[i].LocalTransform, ref transform, out combinedTransform);
BoundingBox childBoundingBox;
shapes.Elements[i].Shape.GetBoundingBox(ref combinedTransform, out childBoundingBox);
BoundingBox.CreateMerged(ref boundingBox, ref childBoundingBox, out boundingBox);
}
}
/// <summary>
/// Gets the bounding box of the shape given a transform.
/// </summary>
/// <param name="shapeTransform">Transform to use.</param>
/// <param name="boundingBox">Bounding box of the transformed shape.</param>
public override void GetBoundingBox(ref RigidTransform shapeTransform, out BoundingBox boundingBox)
{
RigidTransform subTransform;
RigidTransform.Multiply(ref shapes.WrappedList.Elements[0].Transform, ref shapeTransform, out subTransform);
shapes.WrappedList.Elements[0].CollisionShape.GetBoundingBox(ref subTransform, out boundingBox);
for (int i = 1; i < shapes.WrappedList.Count; i++)
{
RigidTransform.Multiply(ref shapes.WrappedList.Elements[i].Transform, ref shapeTransform, out subTransform);
BoundingBox toMerge;
shapes.WrappedList.Elements[i].CollisionShape.GetBoundingBox(ref subTransform, out toMerge);
BoundingBox.CreateMerged(ref boundingBox, ref toMerge, out boundingBox);
}
boundingBox.Min.X -= collisionMargin;
boundingBox.Min.Y -= collisionMargin;
boundingBox.Min.Z -= collisionMargin;
boundingBox.Max.X += collisionMargin;
boundingBox.Max.Y += collisionMargin;
boundingBox.Max.Z += collisionMargin;
}
