Quaternion interpolation using SLERP
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Hi, I had a question about the subject. First there is more than one formula at various tutorials: http://www.theory.org/software/qfa/writeup/node12.html http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/ I do not believe they are the same formula expressed in different ways Second depending on the formula the angle Theta used is either the angle between the quaternions or half the angle between them. So my question is any good tutorials out there that I can trust? My other question is what do I do when the angle between them is 180 degrees. You will try to divide by sin(180). Linear interpolation that's used when theta == 0 isn't appropriate in this case. What now? Thanks.