public static void CalcBoundingBox(MeshContent mesh, ModelContent owner)
{
Vector3 minBox = new Vector3(Single.MaxValue, Single.MaxValue, Single.MaxValue);
Vector3 maxBox = new Vector3(-Single.MaxValue, -Single.MaxValue, -Single.MaxValue);
foreach (Vector3 x in mesh.Positions)
{
minBox.X = Math.Min(minBox.X, x.X);
minBox.Y = Math.Min(minBox.Y, x.Y);
minBox.Z = Math.Min(minBox.Z, x.Z);
maxBox.X = Math.Max(maxBox.X, x.X);
maxBox.Y = Math.Max(maxBox.Y, x.Y);
maxBox.Z = Math.Max(maxBox.Z, x.Z);
}
// find the ModelMeshContent of the same name and store the bbox there
// a little funky backwoods of the xna process, methinks
foreach (ModelMeshContent m in owner.Meshes)
{
if (m.Name == mesh.Name)
{
UIMeshData data = new UIMeshData();
data.bBox.Min = minBox;
data.bBox.Max = maxBox;
m.Tag = data;
}
}
}
protected void AddBoundingFrame(Model model, ModelBone bone)
{
if (bone.Children.Count > 0)
{
ModelBone boneChild = bone.Children[0];
// we really only support one mesh as the box
ModelMesh mesh = ModelHelper.FindMatchingMeshForBone(model, boneChild);
// include upto panel transform as
// we want them relative to the panels parent
Matrix boxTransform = boneChild.Transform * bone.Transform * boneClass.Transform;
// for now just use an empty one until we have a content pipeline solution
// BoundingBox box = ModelHelper.CalculateBoundingBox(mesh);
BoundingBox box;
UIMeshData data = mesh.Tag as UIMeshData;
Debug.Assert(data != null, "Missing bounding box on mesh " + mesh.Name + ". Set the content processor on your model to UIModelProcessor.");
if (data != null)
{
box = data.bBox;
}
else
{
box = new BoundingBox();
}
// apply transform to min and max and create a new aligned box
Vector3[] points = new Vector3[2];
points[0] = Vector3.Transform(box.Min, boxTransform);
points[1] = Vector3.Transform(box.Max, boxTransform);
this.boundingFrame = BoundingBox.CreateFromPoints(points);
}
}
