Mesh topology.

枚举成员

LineLoop: 2

Draws a straight line to the next vertex, and connects the last vertex back to the first

Lines: 1

Draws a line between a pair of vertices

LineStrip: 3

Draws a straight line to the next vertex.

Points: 0

Draws a single dot

TriangleFan: 6

Draws a triangle fan

Triangles: 4

Draws a triangle for a group of three vertices

TriangleStrip: 5

Draws a triangle strip