[Opensim-users] OpenSim Crashes when running a small Vehicle Script

[Thomas Seuring]

I've wrote a small, very easy Script to drive a Vehicle. But everytime I get
and like to drive, OpenSim crashes.

Any ideas?

Thanks

Tom

BELOW: Crash and Code:


The crash is:

Region (root) # Stacktrace:

  at (wrapper managed-to-native) Ode.NET.d.JointSetLMotorAxis
(intptr,int,int,single,single,single) <0x00004>
  at (wrapper managed-to-native) Ode.NET.d.JointSetLMotorAxis
(intptr,int,int,single,single,single) <0xffffffff>
  at 
OpenSim.Region.Physics.OdePlugin.ODEVehicleSettings.SetLinearMotorProperties
() <0x001e6>
  at OpenSim.Region.Physics.OdePlugin.ODEVehicleSettings.LinearMotor
(single) <0x004aa>
  at OpenSim.Region.Physics.OdePlugin.ODEVehicleSettings.Step (single)
<0x0009b>
  at OpenSim.Region.Physics.OdePlugin.OdePrim.Move (single) <0x00b20>
  at OpenSim.Region.Physics.OdePlugin.OdeScene.Simulate (single) <0x0155f>
  at OpenSim.Region.Framework.Scenes.SceneGraph.UpdatePhysics (double)
<0x0003c>
  at OpenSim.Region.Framework.Scenes.Scene.Update () <0x004d5>
  at OpenSim.Region.Framework.Scenes.Scene.Heartbeat (object) <0x00018>
  at (wrapper runtime-invoke) object.runtime_invoke_void__this___object
(object,intptr,intptr,intptr) <0xffffffff>
Abort trap


The Script is:
// set the vehicle parameters
setupVehicle()
{
    llSetStatus(STATUS_PHYSICS, TRUE);
    llSetVehicleType(VEHICLE_TYPE_CAR);
    
    // The vehicle will get up to full speed in 1 second
    llSetVehicleFloatParam(VEHICLE_LINEAR_MOTOR_TIMESCALE, 1.0);
    
    // The motor will become ineffective after 3 seconds.
    llSetVehicleFloatParam(VEHICLE_LINEAR_MOTOR_DECAY_TIMESCALE, 3.0);
    
    // Turn off angular and linear deflection
    llSetVehicleFloatParam(VEHICLE_ANGULAR_DEFLECTION_EFFICIENCY, 0.0);
    llSetVehicleFloatParam(VEHICLE_LINEAR_DEFLECTION_EFFICIENCY, 0.0);

    // Set low linear friction, equal in all directions
    llSetVehicleFloatParam(VEHICLE_LINEAR_FRICTION_TIMESCALE, 5000.0);
    
    // Set very high angular friction, this vehicle does not
    // like to turn
    llSetVehicleFloatParam(VEHICLE_ANGULAR_FRICTION_TIMESCALE, 0.1);
}

// stop this object from being a vehicle
noVehicle()
{
    // Turn off physics and vehicle params
    llSetVehicleType(VEHICLE_TYPE_NONE);
    llSetStatus(STATUS_PHYSICS, FALSE);
}

// give this prim a wedge shape and set it to about avatar size
setupObject()
{
    llSetPrimitiveParams([
    PRIM_TYPE, 
        PRIM_TYPE_BOX,
        PRIM_HOLE_DEFAULT,
        <0.75, 1.0, 0.0>,
        0.0,
        <0.0, 0.0, 0.0>,
        <1.0, 1.0, 0.0>,
        <0.0, 0.0, 0.0>,
    PRIM_SIZE,
        <4.0, 1.5, 0.5>
        ]);
}

// default state, not a vehicle
default
{
    state_entry()
    {
        noVehicle();
        setupObject();
                
        // Set the location avatars will sit
        llSitTarget(<-1.0, 0.0, 0.5>, ZERO_ROTATION);
    }
    
    changed(integer change)
    {
        if (change & CHANGED_LINK)
        {
            if (llAvatarOnSitTarget() != NULL_KEY)
            {
                // someone is sitting on the object; request permission
                // to take controls
                llRequestPermissions(
                    llAvatarOnSitTarget(),
                    PERMISSION_TAKE_CONTROLS);
            }
        }
    }
    
    run_time_permissions(integer perm)
    {
        // the run time permissions have changed; if script can
        // take controls, do that and go to the vehicle state
        if (perm & PERMISSION_TAKE_CONTROLS)
        {
            llTakeControls(
                CONTROL_FWD | CONTROL_BACK |
                CONTROL_LEFT | CONTROL_RIGHT |
                CONTROL_ROT_LEFT |CONTROL_ROT_RIGHT,
                TRUE, FALSE);
            state vehicle;
        }
    }
}

state vehicle
{
    state_entry()
    {
        setupVehicle();
    }
        
    changed(integer change)
    {
        // If the avatar sitting on this object gets up, stop
        // being a vehicle
        if (change & CHANGED_LINK)
        {
            if (llAvatarOnSitTarget() == NULL_KEY)
            {
                // no one is sitting on the object; stop
                // being a vehicle
                llReleaseControls();
                state default;
            }
        }
    }
    
    control(key from, integer level, integer edge)
    {
        integer pressed = (level & edge);
        vector velocity = ZERO_VECTOR;
        float speed = 15.0;
        
        if (pressed & CONTROL_FWD)
        {
            velocity = <1.0, 0.0, 0.0>;
        }
        else if (pressed & CONTROL_BACK)
        {
            velocity = <-1.0, 0.0, 0.0>;
        } 
        else if (pressed & CONTROL_LEFT ||
                 pressed & CONTROL_ROT_LEFT)
        {
            velocity = <0.0, 1.0, 0.0>;
        }
        else if (pressed & CONTROL_RIGHT ||
                 pressed & CONTROL_ROT_RIGHT)
        {
            velocity = <0.0, -1.0, 0.0>;
        }
        if (velocity != ZERO_VECTOR)
        {
            velocity = velocity * speed;
            llSetVehicleVectorParam(
                VEHICLE_LINEAR_MOTOR_DIRECTION,
                velocity);
        } 
    }
}
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