BUMPS: A program for animating projections

ABSTRACT

BUMPS (Brown University Multiple Projection System) is a program that illustrates the implementation of viewing transformations using animation. The program uses the viewing model defined in the Core Graphics System. BUMPS employs interactive computer graphics to demonstrate how planar geometric projections are generated, what the effects of different projections and projection parameters are on the projected object, and how the viewing functions of the Core Graphics System work. After presenting background material on projections, the features of BUMPS are described, followed by a pictorial user scenario of BUMPS in action. The paper concludes with a discussion of the merits of user controlled animation for teaching and possible improvements to the program.

References

1. 1.Carlbom, I., and Paciorek, J. "Planar Geometric Projections and Viewing Transformations," Computing Surveys 10, 4 (Dec. 1978), 465-502.
2. 2.GSPC. "Status Report of the Graphics Standards Planning Committee of ACM/SIGGRAPH," Computer Graphics 11, 3 (Fall, 1977).
3. 3.GSPC. "Status Report of the Graphics Standards Planning Committee of ACM/SIGGRAPH," Computer Graphics 13, 3 (Aug., 1979).
4. 4.Gurwitz, R.F., Fleming, R.T., and van Dam, A. "MIDAS: A Microprocessor Display and Animation System," Brown University Department of Computer Science Technical Report CS-43, October, 1978.
5. 5.Ostby, E. "Brown University Multiple Projections System (BUMPS) User's Guide," Brown University, Providence, RI, February, 1979.
6. 6.Stocker, F.R., and Minsker, T. "Graphics Geometric Perception and Communications," Computers and Graphics 1 2/3 (Sep. 1975), 161-174.

Index Terms

• Computing methodologies

  • Artificial intelligence

    • Computer vision

      • Computer vision problems

  • Computer graphics

    • Animation

    • Image manipulation

    • Rendering

• Theory of computation

  • Randomness, geometry and discrete structures

    • Random projections and metric embeddings