static Vector3 GetPositionForNewBrush()
{
Vector3 newPosition = Vector3.zero;
if (SceneView.lastActiveSceneView != null)
{
Transform cameraTransform = SceneView.lastActiveSceneView.camera.transform;
Ray ray = new Ray(cameraTransform.position, cameraTransform.forward);
// First of all try to cast against existing brushes
List <PolygonRaycastHit> hits = csgModel.RaycastBrushesAll(ray, false);
if (hits.Count > 0)
{
newPosition = hits[0].Point;
// Back a unit, since the brush is around 2 units in each dimensions
newPosition += hits[0].Normal;
newPosition -= csgModel.GetComponent <Transform>().position;
if (CurrentSettings.PositionSnappingEnabled)
{
float snapDistance = CurrentSettings.PositionSnapDistance;
newPosition = MathHelper.RoundVector3(newPosition, snapDistance);
}
}
else
{
// Couldn't hit an existing brush, so try to cast against the grid
float hitDistance = 0;
Plane activePlane = GetActivePlane();
if (activePlane.Raycast(ray, out hitDistance))
{
newPosition = ray.GetPoint(hitDistance);
// Back a unit, since the brush is around 2 units in each dimensions
newPosition += activePlane.normal;
newPosition -= csgModel.GetComponent <Transform>().position;
if (CurrentSettings.PositionSnappingEnabled)
{
float snapDistance = CurrentSettings.PositionSnapDistance;
newPosition = MathHelper.RoundVector3(newPosition, snapDistance);
}
}
else
{
// Couldn't hit the grid, probably because they're looking up at the sky, so fallback to the camera pivot point
newPosition = SceneView.lastActiveSceneView.pivot;
if (CurrentSettings.PositionSnappingEnabled)
{
float snapDistance = CurrentSettings.PositionSnapDistance;
newPosition = MathHelper.RoundVector3(newPosition, snapDistance);
}
}
}
}
return(newPosition);
}