Hi,
I''ve got a problem with 3D rotation. I am writing a small flight simulator (or, to be precise, something like that
), and I''m using quaternions for rotations. But after some yaw/pitch/roll changes the model I''m using is no more pointing in the direction of the velocity. The rotation code is as follows:
dir.postMult(f00Quat(-deltadir.y, 1.0f, 0.0f, 0.0f));
dir.postMult(f00Quat(-deltadir.x, 0.0f, 1.0f, 0.0f));
dir.postMult(f00Quat(-deltadir.z, 0.0f, 0.0f, 1.0f));
(dir is a quaternion for storing the plane orientation)
glLoadIdentity();
gluLookAt(campoint.x, campoint.y, campoint.z, position.x, position.y, position.z, 0.0, 1.0, 0.0);
glTranslated(position.x, position.y, position.z);
GLfloat matrix[16];
planeorient->getMatrix(matrix);
glMultMatrixf(matrix);
DrawShip();
where planeorient is another quaternion, which has the same rotations as ''dir'', but inverted - it works, but it''s kindda strange that I have to transform the plane with the inverted rotations to get it right... (so the physics uses the ''dir'' quaternion, but the graphics needs ''planeorient'')
(BTW this is a fly-by-cam)
I''m pretty sure that the quaternion class is okay, since it isn''t my code
Is there anything wrong in this code ? Or is there an easier way to do three degree of freedom rotations ? I''ve tried some other ways, but only the first rotation worked, the other two seemed to rotate the plane around the _original_ axis instead of the transformed ones.
Thanks for your help,
Baloo
