Each cell is bounded by four planes passing through its four edges and
the center of the sphere. These metrics relate to the angle between each
pair of opposite bounding planes, or equivalently, between the planes
corresponding to two different s-values or two different t-values. For
example, the maximum angle between opposite bounding planes for a cell at
level k is K_MAX_ANGLE_SPAN.getValue(k), and the average angle span for all
cells at level k is approximately kAvgAngleSpan.getValue(k).
Linear -> 1
Tan -> pi / 2.0 (1.571)
Quadratic -> 4.0 / 3.0 (1.333) [Default]
Each cell is bounded by four planes passing through its four edges and the center of the sphere. These metrics relate to the angle between each pair of opposite bounding planes, or equivalently, between the planes corresponding to two different s-values or two different t-values. For example, the maximum angle between opposite bounding planes for a cell at level k is K_MAX_ANGLE_SPAN.getValue(k), and the average angle span for all cells at level k is approximately kAvgAngleSpan.getValue(k). Linear -> 1 Tan -> pi / 2.0 (1.571) Quadratic -> 4.0 / 3.0 (1.333) [Default]