// Billboard effect orients the mesh so that it is always turned towards the camera
private void ApplyBillboardMatrix()
{
Matrix3D view, proj;
bool isMatrixValid = Camera1.GetCameraMatrices(out view, out proj);
if (!isMatrixValid)
{
return;
}
// To create a billboard effect, we invert the camera's view matrix and reset the offset components
view.Invert();
view.OffsetX = 0;
view.OffsetY = 0;
view.OffsetZ = 0;
var matrixTransform3D = _shownLineModel3D.Transform as MatrixTransform3D;
if (matrixTransform3D != null && !matrixTransform3D.IsFrozen)
{
matrixTransform3D.Matrix = view;
}
else
{
_shownLineModel3D.Transform = new MatrixTransform3D(view);
MeshInspector.Transform = _shownLineModel3D.Transform;
}
}
