void DrawDeformGUI()
{
GUILayout.Box("Brush Settings", new GUILayoutOption[]{GUILayout.ExpandWidth(true), GUILayout.Height(20)});
pull = (Event.current.shift);
vertexMode = (VertexMode)EditorGUILayout.EnumPopup("Vertex Mode", vertexMode);
vertexContraint = (VertexContraint)EditorGUILayout.EnumPopup("Vertex Constraint", vertexContraint);
DrawBrushSettingsGUI();
EditorGUILayout.LabelField(pull ? "Pull (shift)" : "Push (shift)");
}