MeshDescriptor.Primitives.polygons(_:_:)

Defines one or more triangles and quadrilaterals with two separate arrays of indices.

Declaration

case polygons([UInt8], [UInt32])

Discussion

Each element in the first array represents a polygon and the element’s value indicates how many vertices in that polygon. The elements in the second array are the vertex indices for the polygons.

For example, to represent a triangle and a quadrilateral the first array has the elements 3 and 4, and the second array has a total of 7 elements, one for every vertex in both polygons.

.polygons([3, 4], [
    0, 1, 2,
    3, 4, 5, 6
])