BABYLON-STEERING

What is

A steering behaviors library for Babylon.js for moving entities in the x/z plane. The library was born thanks to these tutorials and the library three-steer.

The following behavious are supported:

• Seek, Seek with Arrive and Attract (Seek with intensity)
• Flee
• Arrive
• Pursue
• Evade
• Interpose
• Wander
• Collision Avoidance
• Follow Path
• Follow Leader
• Queue
• Cohesion, separation and alignment (Flocking)
• Hide
• Apply general force

Steering Entities can:

• look at a specific target with the .lookAt() method
• look where they are going with the .lookWhereGoing() method

How to setup

Include babylon-steering library:

import babylon-steering from 'babylon-steering';

Create a basic Babylon.js 3D scene with a mesh and simply instantiate a Steering Entity:

const redSphere = new SteeringVehicle(my_mesh, engine, option);

Add the behavior/s to the steering entity and the update method inside main render/animation loop:

scene.executeWhenReady(function () {
        engine.runRenderLoop(function () {

            my_mesh
                .seekWithArrive(greenTarget, 50)
                .hasInConeOfView(arrayOfEnemies)
                .avoid(obstacleIstances)
                .applyForce(new BABYLON.Vector3(1, 0, 0.75))    // For istance can be WIND...
                .lookWhereGoing(true);

            my_mesh.animate();  // Update the Steering Vehicle

            scene.render();
        });
});

Combine behaviours

It is possible to combine many simultaneous steering forces by passing the following parameters to the .animate() function according to the four methods described in this bog post:

• priority for Priority Arbitration
• weighted for Weighted Blending,
• probability for 'Prioritised Dithering'
• truncated for 'Weighted Prioritised Truncated Sum'

blueSphere.animate('blend');  // 'blend' 'priority' 'probability'  'truncated' 

Examples

To test some examples just:

# 1)istall dependencies
npm install
# 2)run development server serving static demo pages at localhost:4000
npm start

Bugs

• Uhm...let me know!

Built With

ES6 Javascript, microbundle,

License

This project is licensed under the ISC License.