Specifying the Spacing of Tessellation Coordinates
Additionally, we can control how fractional values for the outer-tessellation levels are used in determining the tessellation coordinate generation for the perimeter edges. (Inner-tessellation levels are affected by these options.) Table 9.3 describes the three spacing options available, where max represents an OpenGL implementation’s maximum accepted value for a tessellation level.
Table 9.3. Options for Controlling Tessellation Level Effects
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