3 replies to this topic

[i_robot]

hi,
guys my question is how can we get the orientation vectors of a mesh in 3D (i.e how can we know which its facing)?
2. Wat exactly is gimbal lock ?
Thanks............:yes:

[Reedbeta]

1. You have to know which way the mesh is facing in its original, local coordinate system. Then you just multiply that vector with the local-to-world transformation to get the facing direction in world coordinates.

2. Google (and correct spelling) is your friend.

[i_robot]

Thanx,.. i've solved the problem now .

[TheNut]

Just a FYI if you haven’t stumbled upon this in your solution. If you use rotation matrices, each row (or column depending on how you order them) contains the direction vector. So the first row contains the X-axis vector, second row contains the Y-axis vector, and the third row contains the Z-axis vector, which is also the object direction vector. You just need to extract that row and voila.

This is a technique most commonly learned and used when you develop a “look at” feature for cameras or objects.