// coorMap = null case for use when loading rocks from database
public RockViewModel(Rock aRock, Canvas canvas, CoordinateMapper coorMap = null)
{
MyRock = aRock;
BCanvas = canvas;
BoulderShape = CreateBoulderShape();
CameraSpacePoint csp = new CameraSpacePoint();
csp.X = (float)aRock.CoorX.GetValueOrDefault(0);
csp.Y = (float)aRock.CoorY.GetValueOrDefault(0);
csp.Z = (float)aRock.CoorZ.GetValueOrDefault(0);
if (coorMap != null)
{
bCanvasPoint = coorMap.MapCameraSpacePointToPointOnCanvas(csp, canvas, SpaceMode.Color);
bPoint = canvas.GetNormalisedPoint(bCanvasPoint);
}
}
