GPU Pro 7

22 I Geometry Manipulation

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Figure 2.6. An edge with elements labeled related to the adaptive tessellation metric.

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Figure 2.7. An edge with elements labeled related to the adaptive tessellation metric.

2.3.1 Adaptive Tessellation

A principal feature of the hardware tessellation pipeline is the ability to vary tes-

sellation dynamically along each edge and in the interior of the patch. We utilize

dynamic tessellation adaptively, to increase tessellation as needed to represent

curvature and to decrease tessellation in flatter areas to reduce costs. Savings

include vertex evaluation costs and also overshading costs ...