Nerdier post of the day: can you crack THIS geometry problem?

[ZombieNixon]

What is the general equation to generate a series of rotations (theta, phi, psi) about the three axes (x, y, z) so as to transform a vector describing one of these axes (those vectors being X: {1, 0, 0}, Y: {0, 1, 0}, Z: {0, 0, 1}) into an arbitrary orientation vector (i, j, k)?

Inputs given: i, j, k, all decimal values representing an orientation vector of length 1
Outputs needed: angles theta (rotation around the z-axis), phi (rotation around the y-axis), psi (rotation around the x-axis)

I sumbit this to you, Lounge, for your head-exploding pleasure. :argh: :banghead:

Enjoy! :evilgrin:

[JohnKleeb]

1. You fucktard

Christ I dunno. Is the answer uhhh X?

[ZombieNixon]

3. No.

I don't know what the answer is, but it's not X.

The values get put in a matrix, but I'm not sure what the values are supposed to represent. I'm hoping they're the angles of rotation or else I'm 100 times fuckeder. x(

[JohnKleeb]

5. I have a math final next friday

I am dreading it like no other. I have no idea what you just said. The highest I got in high school as far as math goes was Geometry. Yes, I am a stupidhead when it comes to math.

[ZombieNixon]

7. What level math is it?

:shrug:

Good luck!

[JohnKleeb]

8. Math For the Liberal Arts I

Sigh if only they had a baseball statistics course it would be the first math course I'd truly ace since Financial Math last year which was a math elective.

[DS1]

2. Stop trying to con other people into doing your homework

well, at least you're not holding a "Graphic Design Contest - Winner gets a ummm free portfolio piece!"

[ZombieNixon]

4. It's not homework, it's technically business.

Fortunately, I own the company, so there's no deadline, except "as soon as possible while still making it work." :D

[ZombieNixon]

6. Well, if anyone can solve it, I'll give you credit for engine development.

Provided the solution works, of course.

It would be weird, seeing a DU username in the credits. :shrug:

:D

[DS1]

9. Just tell them that John Carmack said it couldn't be done, and that's that

http://en.wikipedia.org/wiki/John_Carmack

[ZombieNixon]

10. But them is me and I never believe myself.

:shrug: :D

It can be done, I just don't know how yet. There's a blasted function to do it, I just don't know where to put it. x(

[Dangerously Amused]

13. I'll tell you where to put the blasted function.

[ZombieNixon]

14. Where?

Q3Vector3D_Add(&limbRotOffsets],&theBone->rot,&playerObj]->rot);

if (abs(limbOrientationAxis]->limb].y) == 1.0f)
{
Q3Matrix4x4_SetRotateVectorToVector(&childMatrix,&limbOrientationAxis]->limb],&playerObj]->YAxisVector);
Q3Vector3D_Transform(&limbOrientationAxis]->limb],&childMatrix,&playerObj]->rot);
}

:P

[Dangerously Amused]

15. I would suggest putting theBone

...right up the ol' Axis.



And keep children out of it, you perv!

[ZombieNixon]

17. ROFL!

:rofl:

[Orsino]

11. 9/11

That's always the answer--unless you've forgotten the lessons of September Eleventh?

[ZombieNixon]

12. Error line 912: ';' expected.

9/11 <-

:shrug:

[WritingIsMyReligion]

16. Is that in English?

:argh:

[ZombieNixon]

18. No, it's in Proto-Indo-European.

:P