enum openfl.display.TriangleCulling

Defines codes for culling algorithms that determine which triangles not to render when drawing triangle paths.

The terms POSITIVE and NEGATIVE refer to the sign of a triangle's normal along the z-axis. The normal is a 3D vector that is perpendicular to the surface of the triangle.

A triangle whose vertices 0, 1, and 2 are arranged in a clockwise order has a positive normal value. That is, its normal points in a positive z-axis direction, away from the current view point. When the TriangleCulling.POSITIVE algorithm is used, triangles with positive normals are not rendered. Another term for this is backface culling.

A triangle whose vertices are arranged in a counter-clockwise order has a negative normal value. That is, its normal points in a negative z-axis direction, toward the current view point. When the TriangleCulling.NEGATIVE algorithm is used, triangles with negative normals will not be rendered.

Specifies culling of all triangles facing toward the current view point.

Specifies no culling. All triangles in the path are rendered.

Specifies culling of all triangles facing away from the current view point. This is also known as backface culling.