Matrices/Math related question

[poopoodice]

Hi, I think this may be a little bit more related to math but I can't seem to find the solution.

1

            stack.translate(1F, 2F, 3F);
            stack.rotate(Vector3f.XP.rotationDegrees(180));
            stack.scale(2.0F, 3.0F, 4.0F);
            stack.rotate(Vector3f.ZP.rotationDegrees(x1));

2

            stack.translate(1F, 2F, 3F);
            stack.rotate(Vector3f.XP.rotationDegrees(180));
            stack.rotate(Vector3f.ZP.rotationDegrees(x2));
            stack.scale(2.0F, 3.0F, 4.0F);

Is it possible, given x1 and calculate the value of x2?

Thanks.

[Draco18s]

No, for two reasons:

1) x1 and x2 are not equal and have no apparent relationship

2) matrix transformations are non-associative

The only thing I can think of is working backwards from the output of the first chunk, removing the rotation, removing the scale, then adding the new rotation and scale back.

Edited November 25, 2021 by Draco18s

[poopoodice]

Interesting, Thank you.