Abstract
We may now address the problem of drawing views of three-dimensional objects on our (necessarily) two-dimensional graphics screen. The simple method we describe here is a direct generalisation of the method introduced in chapter 4 for two-dimensional objects. Again it involves the use of (up to) three positions. To illustrate these ideas we first give a brief outline, and then expand on this using numerous pictorial and numerical examples. We start by defining an arbitrary but fixed triad of axes in space that we call the ABSOLUTE system. Then, as in the two-dimensional case, we consider three positions: (1) the SETUP, (2) the ACTUAL and (3) the OBSERVED position.
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© 1983 Ian O. Angell and Brian J. Jones
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Angell, I.O., Jones, B.J. (1983). Orthographic Projections. In: Advanced Graphics with the Sinclair ZX Spectrum. Palgrave, London. https://doi.org/10.1007/978-1-349-06763-3_10
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DOI: https://doi.org/10.1007/978-1-349-06763-3_10
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-06765-7
Online ISBN: 978-1-349-06763-3
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