Script attributes are null

Help & Support
1

script attributes are null and don’t know why
I mean topSpeed and so on

// Script Attributes

// top vehicle speed
Vehicle.attributes.add('topSpeed', 'number', 10, {
    displayName: 'Top Speed'
}); 

// used to accelerate the vehicle
Vehicle.attributes.add('maxEngineForce', 'number', 1000, {
    displayName: 'Max Engine Force'
}); 

// used for braking
Vehicle.attributes.add('maxBrakingForce', 'number', 30, {
    displayName: 'Max Braking Force'
}); 

// Wheel parameters
Vehicle.attributes.add('suspensionStiffness', 'number', 20, {
    displayName: 'Suspension Stiffness'
});

Vehicle.attributes.add('suspensionDamping', 'number', 2.3, {
    displayName: 'Suspension Damping'
});

Vehicle.attributes.add('suspensionCompression', 'number', 4.4, {
    displayName: 'Suspension Compression'
});

Vehicle.attributes.add('suspensionRestLength', 'number', 0.6, {
    displayName: 'Suspension Rest Length'
});

Vehicle.attributes.add('rollInfluence', 'number', 2, {
    displayName: 'Roll Influence'
});

Vehicle.attributes.add('friction', 'number', 1000, {
    displayName: 'Friction Slip'
});

Vehicle.attributes.add('topRotationSpeed', 'number', 10, {
    displayName: 'Top Rotation Speed'
}); 

Vehicle.attributes.add('torque', 'number', 500, {
    displayName: 'Torque'
});
2

Hi @grzesiekmq,

Have you created a scriptType on top? Like this:

var Vehicle = pc.createScript('vehicle');

Attribute definitions should come after that.

3

I have in es6 style
pc.registerScript(Vehicle, 'vehicle');
maybe revert to es5?

4

That’s not fully complete for what you are trying to do. It will register the new script type to the Playcanvas script registry, but you must pass a reference to an object to use later for declaring your attributes.

1 Like
5

Here is a more complete example if you want to go with full ES6 classes:

     // define a ES6 script class
    class PlayerController extends pc.ScriptType {
     
          initialize() {
              // called once on initialize
          }
     
          update(dt) {
              // called each tick
          }
     }
     
     // register the class as a script
     pc.registerScript(PlayerController);
     
     // declare script attributes (Must be after pc.registerScript())
     PlayerController.attributes.add('attribute1', {type: 'number'});
6

I copied vehicle script from space buggy but have

no script objects found

on vehicle script

7

Can you post a sample project link to take a look?

8

ok I added

var Vehicle = pc.createScript('vehicle');

and detects the vehicle script object

1 Like
9

but still not parsing script attributes
here this is scene
https://playcanvas.com/editor/scene/933948

10

Are you using legacy scripts? That’s the old script format you are trying to parse.

For the correct one consult the manual:

https://developer.playcanvas.com/en/user-manual/scripting/creating-new/

2 Likes