When setting the Camera's Axes, this defines which axis of the axes is up in screen space, where up is from the bottom to the top of the screen.
| Member | Value | Description | 
|---|---|---|
| eStkGraphicsConstrainedUpAxisX | 0 | The X axis is constrained. | 
| eStkGraphicsConstrainedUpAxisY | 1 | The Y axis is constrained. | 
| eStkGraphicsConstrainedUpAxisZ | 2 | The Z axis is constrained. | 
| eStkGraphicsConstrainedUpAxisNegativeX | 3 | The negative X axis is constrained. | 
| eStkGraphicsConstrainedUpAxisNegativeY | 4 | The negative Y axis is constrained. | 
| eStkGraphicsConstrainedUpAxisNegativeZ | 5 | The negative Z axis is constrained. | 
| eStkGraphicsConstrainedUpAxisNone | 6 | No axis is contained. | 





