This is the basics of the Dot and Cross products explained, including what to use them for and some linear algebra and matrices compiled into shadertoy examples to view. They will be coming on a bi-weekly basis.
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Read the comments and uncomment the code lines block by block.
Use the compile button after changing code.
THE DOT PRODUCT IN 2D
THE DOT PRODUCT IN 3D
TRIGONOMETRY ON THE UNIT CIRCLE
THE CROSS PRODUCT
Matrices
Martin Baadsgaard 