"And" <firstname.lastname@example.org> wrote:
> Oh, I know what thing do you said now, thank you.
> What you said is about the transform associate with camera before cast to
Yes, but it can affect more than the camera. You can use a plain camera and
apply those types of transforms to objects or even patterns. This is sort of
how some pigment patterns are generated, and it's also very much like
uv-mapping, parametrics, Bezier patches, etc.
One of our vectors might not be "x", but "East" as we travel around a globe.
You have your normal x, y, and z as a starting point - the standard orthogonal
unit vectors - but then traveling in the new directions does not result in
travel along the cardinal axes, or even straight lines, because you're following
the path of a different vector or parametric function.
> I have basic capability with vector and matrix. But fail to understand
> eigenvalue/ eigenvector / diagonal matrix
> I ever derive/coding method of axis rotate by myself.
Yes, that's a good thing to do - the more you understand the basics, the less
mysterious the more complicated stuff seems to be.
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