Principles of interactive computer graphics (2nd ed.)
Principles of interactive computer graphics (2nd ed.)
Communications of the ACM
TIGS: An overview of the terminal independent graphics system
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
Natural and efficient viewing parameters
SIGGRAPH '80 Proceedings of the 7th annual conference on Computer graphics and interactive techniques
| Hi-index | 0.00 |
An algorithm is presented which clips on a non-rotated viewport positioned anywhere on the viewport plane relative to the viewing vector. This is a generalization of the traditional three-dimensional clipping algorithm in which the viewing vector intersects the viewport at its center. This traditional algorithm is shown to be a special case of the general algorithm. Also shown is that both orthogonal box clipping and perspective pyramid clipping can be accomplished using the same algorithm with only a slight increase in complexity. Finally, the ability to perform switch-controlled hither and yon plane clipping is described. It should be noted that with this general clipping algorithm no separate clipping operation is required for two-dimensional operations since they can be handled as an orthogonal projection from an arbitrary default Z-plane onto the viewport plane.