Math question about my vectors

[3DModelerMan]

Hi I have vectors that store, my nodes rotation,and position, I don't know which I should keep the same and wich ones I should increment/ decrement for my node to move forward, here's my code

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main_player_wolf->setPosition( vector3df( wolf_rotX, wolf_rotY, wolf_rotZ + 1 ) + vector3df( wolf_posX + 1, wolf_posY + 1, wolf_posZ + 1 ) );

. Could someone please show me an example of what I should do?. Thanks .

[sudi]

you should really learn vectormath dude.

http://chortle.ccsu.edu/VectorLessons/vectorIndex.html

[3DModelerMan]

Okay I'll look into that, but it does'nt seem to have anything on what I'm doing, all I want now is to see what I'm doing wrong.

[sudi]

everything really^^
u will have to set some zero rotation forward vector like
0,0,1 : thats forward when rotation is 0,0,0

now make a matrix and set its roation to ur current rotation.

now u transform your forward vector(here 0,0,1) by this matrix.

that resulting vector is forward. now just normlize it and multiply by ur speed then add to ur current position.

[3DModelerMan]

Oh thanks! .

[Dorth]

You don't need to normalize in the previous example though. If you have your direction vector which is normalized and make a matrix out of a rotation vector, it should come out normalized.

[3DModelerMan]

Yeah, thanks .