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Show u APPENDIX D PICTURES The pictures ir this appendix were made on the high-precision CRT at the University of Utah. All pictures were made ut 512 resolution. The h-am was slightly overfocused. The discontinuities in the shading on the everting spheres are caused by first derivative discontinuities in the surface description and not by the algorithm. The roughness at the intersections are a result of insufficient z resolution. The front clipping plane was rrv.ich too close to the eye. The area-sampled Klein bottle clearly illustrates deficiencies in the area-sampling algorithm presented in chapter seven. However, the algorithm works very well for mapping. The photographs used for mapping were scanned into the computer with a scanning device at the University of Utah. Only lack of time prevented a more elaborate demonstration of the power of mapping. The shading discontinuities in the brick cylinder occur because the original brick wall was not evenly lit. MMUMBB-MMM. •'-•-• „n ■ , , |
