Principles of interactive computer graphics (2nd ed.)
Principles of interactive computer graphics (2nd ed.)
Some Major Issues in the Design of the Core Graphics System
ACM Computing Surveys (CSUR)
Planar Geometric Projections and Viewing Transformations
ACM Computing Surveys (CSUR)
General clipping on an oblique viewing frustrum
SIGGRAPH '77 Proceedings of the 4th annual conference on Computer graphics and interactive techniques
DIGRAF—a FORTRAN implementation of the proposed GSPC standard
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
System architecture for high-performance vector graphics
System architecture for high-performance vector graphics
A procedural interface for volume rendering
VIS '90 Proceedings of the 1st conference on Visualization '90
The IBar: a perspective-based camera widget
Proceedings of the 17th annual ACM symposium on User interface software and technology
Keyframing using linear interpolation of matrices
SIGGRAPH '05 ACM SIGGRAPH 2005 Posters
Technical Section: View-projection animation for 3D occlusion management
Computers and Graphics
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The viewing scheme in the Core Graphics System is based on a unified approach to the specification of the viewing parameters for all types of planar geometric projections. As a result, the specification of some of the viewing parameters is inconsistent with traditional ways of specification and will often be found unnatural for use in certain application areas. Additionally, this choice of viewing parameters leads to inefficient implementations of viewing parameter modification, particularly in a high-performance graphics system which supports transformations in hardware or firmware. The natural ways to specify the different viewing parameters are discussed and efficiency considerations for viewing implementations are described. The Core System viewing scheme is evaluated in terms of its naturalness and efficiency of implementation. An alternate viewing scheme is proposed that provides viewing parameters that are more natural for many applications and that can he modified more efficiently.