James H. Clark

TL;DR: The geometric structure suggests a recursive descent, visible surface algorithm in which the computation time potentially grows linearly with the visible complexity of the scene, and the range of complexity of an environment is greatly increased.

TL;DR: An experimental system for computer-aided design of free-form surfaces in three dimensions that allows 3-D movements of the points controlling the shapes of the surfaces and the mathematical formulations used assume no knowledge of them by the user of the system.

TL;DR: The thesis of the research is that the geometric structure inherent in the definition of the shapes of three-dimensional objects and environments must be used not just to define their relative motion and placement but also to assist in solving many other problems of systems for producing pictures by computer.

TL;DR: The film accompanied by this paper illustrates an experimental system for real-time Computer-Aided Geometric Design of three-dimensional parametric surfaces and illustrates a continuous-tone, shaded rendering of a design sequence.

TL;DR: In this paper, the authors used a PDP-I 1/45 computer with a 256K-byte random access frame buffer which was used as the depth buffer for image generation.