Graphics (TOG)


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ACM Transactions on Graphics (TOG), Volume 4 Issue 4, Oct. 1985

The application of scene synthesis techniques to the display of multidimensional image data
Philip K. Robertson, John F. O'Callaghan
Pages: 247-274
DOI: 10.1145/6116.6117
Superimposition of two image data sets allows the spatial distribution of one to be directly related to that of the other. If the two data sets have different spatial structures, the composite image is generally confusing and difficult to...

Projective transformations of the parameter of a Bernstein-Bézier curve
Richard R. Patterson
Pages: 276-290
DOI: 10.1145/6116.6119
The definitions of polynomial and rational Bernstein-Bézier curves are reviewed and extended to include homogeneous parametrizations. Then the effects of a projective transformation of the parameter space are described in terms of a group...

Ray tracing generalized cylinders
Willem F. Bronsvoort, Fopke Klok
Pages: 291-303
DOI: 10.1145/6116.6118
An algorithm is presented for ray tracing generalized cylinders, that is, objects defined by sweeping a two-dimensional contour along a three-dimensional trajectory. The contour can be any 'well-behaved' curve in the sense that it is continuous,...