Math Reflecting a Vector How to derive and understand the formula for reflecting a vector in another vector. This formula then is applied to bouncing an object off of a plane.
Matrix Math Covers some of the math behind matrices for a 4x4 matrix, which include a 3x3 rotation matrix of basis vectors and a translation vector. Gives a quick formula inverting a matrix created with only rotation and translation.
3d Math Questions Three 3d math questions are presented, and followed by a possible answer. (1) Angle between vectors (2) triangle to plane conversion and (3) bounding box to sphere + overlap test.
Tangent Space Describes how to compute an orthonormal tangent space basis (tangent, bitangent) for a triangle or a full mesh. Briefly touches on using these vectors.
Quaternion Math Some of the math behind quaternions, concentrating on quaternion interpolation.
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