public static void DrawPolygonCenters(LineMeshManager lineManager, CSGBrush brush)
{
// todo: check perf and maybe have to cache this somewhere
var controlState = new ControlMeshState(brush);
controlState.UpdatePoints(brush.ControlMesh);
for (int i = 0; i < controlState.PolygonCenterPoints.Length; i++)
{
var normal = brush.compareTransformation.localToWorldMatrix.MultiplyVector(controlState.PolygonCenterPlanes[i].normal);
var pa = controlState.PolygonCenterPoints[i] + normal * .002f;
var move = 2 * .0254f;
var t1 = Vector3.Cross(normal, Vector3.forward);
var t2 = Vector3.Cross(normal, Vector3.up);
var tangent = t1.magnitude > t2.magnitude ? t1 : t2;
var tangent2 = Quaternion.AngleAxis(90, normal) * tangent;
lineManager.DrawLine(pa - tangent * move, pa + tangent * move, ColorSettings.HelperPolygonCenter);
lineManager.DrawLine(pa - tangent2 * move, pa + tangent2 * move, ColorSettings.HelperPolygonCenter);
}
}