March 2017
Intermediate to advanced
480 pages
11h 3m
English
Content preview from Game Physics Cookbook
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Vector matrix multiplication
We have now implemented translation, scaling, and rotation in terms of matrices. These matrices become useful when we can apply their transformations to vectors. How do we apply a matrix transformation to a vector? The same way we do to a matrix: using matrix multiplication!
To multiply a vector and a matrix, we need to think of a vector as a matrix that has only one row or column. This leaves us with an important question, is a vec3 a matrix with one column and three rows, or three columns and one row?
|
Row Vector |
Column Vector |
|---|---|
|
Pre Multiplication |
Post Multiplication |
|
If the vector is on the left side of the ...
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