public void BuildBox(ModelInstance modelInstance)
{
Min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
Max = new Vector3(float.MinValue, float.MinValue, float.MinValue);
// build the transformation matrix
var scale = Matrix.CreateScale(modelInstance.Scale);
var rotate = Matrix.CreateFromQuaternion(new Quaternion(modelInstance.Frame.Orientation.X, modelInstance.Frame.Orientation.Y, modelInstance.Frame.Orientation.Z, modelInstance.Frame.Orientation.W));
var cellTranslate = Matrix.CreateTranslation(new Vector3(modelInstance.Cell.X * Landblock.CellSize, modelInstance.Cell.Y * Landblock.CellSize, 0));
var cellTranslateInner = Matrix.CreateTranslation(new Vector3(modelInstance.Position.X, modelInstance.Position.Y, modelInstance.Position.Z));
var transform = scale * rotate * cellTranslate * cellTranslateInner;
foreach (var gfxObj in modelInstance.StaticMesh.GfxObjs)
{
foreach (var v in gfxObj.VertexArray.Vertices.Values)
{
var vertex = Vector3.Transform(new Vector3(v.X, v.Y, v.Z), transform);
if (vertex.X < Min.X)
{
Min.X = vertex.X;
}
if (vertex.Y < Min.Y)
{
Min.Y = vertex.Y;
}
if (vertex.Z < Min.Z)
{
Min.Z = vertex.Z;
}
if (vertex.X > Max.X)
{
Max.X = vertex.X;
}
if (vertex.Y > Max.Y)
{
Max.Y = vertex.Y;
}
if (vertex.Z > Max.Z)
{
Max.Z = vertex.Z;
}
}
}
GetSize();
}
public BoundingBox(ModelInstance modelInstance)
{
ModelInstance = modelInstance;
BuildBox(modelInstance);
}