public AxisType UpAxis { get; set; }
Public Property UpAxis As AxisType
Get
Set
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In the camera projection, the up axis will always be Y, since the resulting 2D image contains only X and Y.
However, the world is most likely arranged as having either Y-up, where X and Z are on the horizontal plane, or Z-up, where X and Y are on the horizontal plane.
All of the transformations in this camera assume that the world arrangement is Y-up. When Z-up is indicated here, an additional conversion is applied to the point just prior to projection to convert its values to the appropriate orientation.