HEMISPHERICAL PROJECTION OF A TRIANGLE
Buming Bian, UT System Center for High Performance Computing, Austin, Texas
Publisher Summary
Form-factor calculation is very important to obtain an accurate simulation of a real scene. The form factor is calculated analytically in terms of the area of a hemispherical projection of a planar patch. This chapter discusses the area of a hemispherical projection of a planar patch by using triangle as an example. The intensity of the receiving triangle, because of a luminous planar triangle in space is proportional to the area of the hemispherical projection of the luminous triangle. The area of the projected triangle is obtained by adding or subtracting the three areas corresponding to the three ...
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