[fpc-pascal] Calculating Pixels to represent 3D coordinates

Jean SUZINEAU Jean.Suzineau at wanadoo.fr
Sat Sep 21 02:00:32 CEST 2019

Tip: if you need Sin(A) and Cos(A), it can be faster to make a single 
call to SinCos instead of two separated calls to Sin and Cos:


It was efficient 20 years ago when I was developing a sky map software, 
may be the gain is negligible today.

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