Hey all, so I’ve finally sorted out all the issues, crosses fingers, in my 3D skeletal animation importer/renderer and I’m left with one question.
Why is it that when you export a skeleton to .fbx with all your rotations in XYZ order you have to tell openGL to rotate in the reverse order ZYX?
To clarify: I currently am updating my martix by calling these functions
gl.glTranslatef(translate.m_x, translate.m_y, translate.m_z);
gl.glScalef(scale.m_x, scale.m_y, scale.m_z);
gl.glRotatef(rotation.m_x, 1.0f, 0.0f, 0.0f);
gl.glRotatef(rotation.m_y, 0.0f, 1.0f, 0.0f);
gl.glRotatef(rotation.m_z, 0.0f, 0.0f, 1.0f);
Which works fine for moving the camera/objects, but for the joints if I want them to rotate properly I have to have the rotate functions reversed, like so.
gl.glTranslatef(translate.m_x, translate.m_y, translate.m_z);
gl.glScalef(scale.m_x, scale.m_y, scale.m_z);
gl.glRotatef(rotation.m_z, 0.0f, 0.0f, 1.0f);
gl.glRotatef(rotation.m_y, 0.0f, 1.0f, 0.0f);
gl.glRotatef(rotation.m_x, 1.0f, 0.0f, 0.0f);