Bug when updating the geometry of a sphereNode

[diegoveigacouceiro]

After creating a SphereNode and adding it to the scene, we try to edit its radius and the result is a plane in the shape of a circle. Another problem that arose when trying to find another way to modify its size is when using the scale method. This causes the sphereNode to increase in size and move away from the coordinate axis currently in the scene, giving the sensation that it is going to infinity as its size increases. Using ModelNodes this problem does not occur.