VDrift coordinate system

[NaN]

I had a look at the code. So we have:

Code:

TRACK::LoadParameters()
...
pos.Set(f3[2], f3[0], f3[1]);
...
QUATERNION <float> orient(f3[2], f3[0], f3[1], f1);

So what do we have here take position xyz from start position and load it as zxy. The same happens to the orientation.

Code:

bool CAR::Load
...
//due to historical reasons the initial orientation places the car faces the wrong way
fixer.Rotate(3.141593,0,0,1);
dynamics.SetInitialConditions(initial_position, fixer*initial_orientation);

Load applies a 180 degrees rotation to the orientation around z-axis.

Code:

void CAR::CopyPhysicsResultsIntoDisplay()
.....
quat = dynamics.GetOrientation();
fixer.Rotate(-3.141593*0.5, 0, 0, 1);
bodynode->GetTransform().SetRotation(quat*fixer);

The orientation is updated by the physics multiplied with a -90 degrees rotation around z-axis(the fixer again).

Well, I've got a track export plugin which allows to do the complete track setup/creation within blender. But not being able to reproduce this orientation transforms in the plugin it returns incorrect orientations.

PS: My test track for the track exporter