public static SceneNode DrawLine(SceneManager mSceneMgr, Vector3 start, Vector3 end)
{
ManualObject line = mSceneMgr.CreateManualObject("line" + numLines);
SceneNode lineNode = mSceneMgr.RootSceneNode.CreateChildSceneNode("line" + numLines + "_node");
MaterialPtr lineMaterial = MaterialManager.Singleton.Create("line" + numLines + "_material", "Default");
lineMaterial.ReceiveShadows = false;
lineMaterial.SetLightingEnabled(true);
lineMaterial.SetDiffuse(LineColour.r, LineColour.g, LineColour.b, 0);
lineMaterial.SetAmbient(LineColour.r, LineColour.g, LineColour.b);
lineMaterial.SetSelfIllumination(LineColour.r, LineColour.g, LineColour.b);
line.Begin("line" + numLines + "_material", RenderOperation.OperationTypes.OT_LINE_LIST);
line.Position(start);
line.Position(end);
line.End();
lineNode.AttachObject(line);
++numLines;
return(lineNode);
}