Nadradený pojem:
Susedné pojmy:
Own trivial acceptance test
Description
When
rendering primitives, OpenGL does not have knowledge of full 3D objects – it
only sees one primitive at a time.
For this reason, it may be more efficient if the programmer organises objects and performs his/her own culling (particularly trivial acceptance tests) before sending objects to OpenGL.
However, for primitives or objects partially in the view volume, it may be more convenient to leave these for OpenGL to clip.
A simple approach would be to have a bounding box around each 3D object. If all eight vertices of the object’s bounding box are in the same negative half-space of a view frustum plane, the entire object can be skipped.
For this reason, it may be more efficient if the programmer organises objects and performs his/her own culling (particularly trivial acceptance tests) before sending objects to OpenGL.
However, for primitives or objects partially in the view volume, it may be more convenient to leave these for OpenGL to clip.
A simple approach would be to have a bounding box around each 3D object. If all eight vertices of the object’s bounding box are in the same negative half-space of a view frustum plane, the entire object can be skipped.
Importance
High