| Package | flash.display |
| Class | public final class TriangleCulling |
| Inheritance | TriangleCulling  Object |
| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
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.
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| Constant | Defined By | ||
|---|---|---|---|
| NEGATIVE : String = "negative" [static]
Specifies culling of all triangles facing toward the current view point. | TriangleCulling | ||
| NONE : String = "none" [static]
Specifies no culling. | TriangleCulling | ||
| POSITIVE : String = "positive" [static]
Specifies culling of all triangles facing away from the current view point. | TriangleCulling | ||
NEGATIVE | Constant |
public static const NEGATIVE:String = "negative"Specifies culling of all triangles facing toward the current view point.
NONE | Constant |
public static const NONE:String = "none"Specifies no culling. All triangles in the path are rendered.
POSITIVE | Constant |
public static const POSITIVE:String = "positive"Specifies culling of all triangles facing away from the current view point. This is also known as backface culling.
Mon Nov 28 2011, 06:48 AM -08:00