Principles of interactive computer graphics (2nd ed.)
Principles of interactive computer graphics (2nd ed.)
A Characterization of Ten Hidden-Surface Algorithms
ACM Computing Surveys (CSUR)
Communications of the ACM
Computer animation of free form images
SIGGRAPH '75 Proceedings of the 2nd annual conference on Computer graphics and interactive techniques
Real time digital image generation
SIGGRAPH '77 Proceedings of the 4th annual conference on Computer graphics and interactive techniques
Models of light reflection for computer synthesized pictures
SIGGRAPH '77 Proceedings of the 4th annual conference on Computer graphics and interactive techniques
Path specification and path coherence
SIGGRAPH '82 Proceedings of the 9th annual conference on Computer graphics and interactive techniques
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A system for removing hidden edges in line displays of three dimensional scenes is described. The hardware system is relatively low cost, and operates on several hundred vectors in real-time. The system consists of a graphics peripheral connected to a PDP 11/55 computer and a software package to drive the peripheral. As each convex object is displayed, the occlusion hardware extracts the silhouette and retains it in a one-plane “matte memory”. As subsequent objects, taken from a priority ordered list, are displayed, the vector generator tests the contents of the frame buffer at the coordinates along the vector. The contents of the matte memory determine which portions of the vector should be intensified. To produce the priority ordered list of objects, the software algorithm uses three ordering techniques applied selectively to different potions of the scene. One technique, used for ordering unconstrained pairs of objects is described in detail.