TextureMatrix tutorial anyone?

[Dare]

Does anyone know where I can find a good tutorial on how to manipulate textureMatrixes? It would be much appreciated.

[Kilinich]

Original post by skydiver:

Look the transformation matrix:

a b c
d e f
g h i

The object's property textureMatrix is [a, b, c, d, e, f, g, h, i].


The transformation matrix (2x2) is only:
a b
d e

To rotate by Q degrees (radians) the transformation matrix is:

cos Q sin Q

-sinQ cos Q

(you know: a = cos Q, b = sin Q, etc)

To scale by a factor of (sx,sy), the transformation matrix is:

sx 0
0 sy

To mix both rotation and translation, we multiply the two matrixes:

sx cos Q sy sin Q

-sx sin Q sy cos Q


The final matrix is then: [sx cos Q, sy sin Q, 0.5, -sx sin Q, sy cos Q, 0.5, 0, 0, 1]

http://www.phunland.com/forum/viewtopic.php?id=7628

[Dare]

I suppose most of that makes sense. I understand trigonometry (sin, cos, tan), but have no idea how to put it into action in scripting. All I am looking for is a nice tutorial on how to make specific matrixes, e.g. dynamic rotor blades. Anyway, thanks for the help.

[Kilinich]

Maybe this help a bit too http://en.wikipedia.org/wiki/Transformation_matrix

If you want to do something with textureMatrix you must multiply it to transformation matrix.
I think you better start with learning what matrix is and what is basic operations.
http://en.wikipedia.org/wiki/Matrix_%28math%29

[Dare]

Maybe when I do linear algebra in maths ... right now I am doing year 10 work, and there is nothing about linear algebra in my work. However, I am moving into physics in science, so they might give us a run-down on matrixes.

At least now I know how complex they are. They are probably too difficult for me at the moment.

[Nait]

What are last three values used for?

[jon_joy_1999]

What are last three values used for?

sanity