Posts tagged math

Derivation of the Orthographic Projection Matrix

The orthographic projection matrix takes a rectangular prism with corners at (l, t, -n) and (r, b, -f) (with l being left, t being top, n being near, r being right, b being bottom, and f being far) and maps it to a cube with the coordinates of the same corners being (-1, 1, 1) […]

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Matrices

Today I was reading Twitter and ran out of posts to view so I noticed my background. For more than a year my background has been a screenshot of this code: MatrixMult.java1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 public class MatrixMult { static int[][] mult(int[][] […]

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More Ideas - Math!

I recently discovered a book called Secrets of Mental Math: The Mathemagician’s Guide to Lightning Calculation and Amazing Math Tricks by Arthur Benjamin and Michael Shermer. Obviously I need a way to practice these techniques so I don’t forget them. This led me to an idea for a new android app that I will be […]

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