How to sync Recast with game loop?

Censor · October 15, 2023, 8:15pm

Is it possible to sync Recast with the game loop? Something like:

scene.onBeforeRenderObservable.add(() => {
    const delta = engine.getDeltaTime();
    recast.update(delta); // something like this, maybe use setTimeStep to pause/unpause?
})

Evgeni_Popov · October 16, 2023, 8:44am

cc @Cedric

Cedric · October 16, 2023, 4:11pm

There is no API to do that.

github.com

BabylonJS/Babylon.js/blob/e4a9c81c15d40b2c4ea22e64a20b6c61a922c9e8/packages/dev/core/src/Navigation/Plugins/recastJSPlugin.ts#L566


      
           * @param maxAgents the maximum agent count in the crowd

           * @param maxAgentRadius the maximum radius an agent can have

           * @param scene to attach the crowd to

           * @returns the crowd you can add agents to

           */

          public constructor(plugin: RecastJSPlugin, maxAgents: number, maxAgentRadius: number, scene: Scene) {

              this.bjsRECASTPlugin = plugin;

              this.recastCrowd = new this.bjsRECASTPlugin.bjsRECAST.Crowd(maxAgents, maxAgentRadius, this.bjsRECASTPlugin.navMesh.getNavMesh());

              this._scene = scene;

          

              this._onBeforeAnimationsObserver = scene.onBeforeAnimationsObservable.add(() => {

                  this.update(scene.getEngine().getDeltaTime() * 0.001 * plugin.timeFactor);

              });

          }

          

          /**

           * Add a new agent to the crowd with the specified parameter a corresponding transformNode.

           * You can attach anything to that node. The node position is updated in the scene update tick.

           * @param pos world position that will be constrained by the navigation mesh

           * @param parameters agent parameters

           * @param transform hooked to the agent that will be update by the scene

But you can do a PR to expose what you need. I’ll review it.

Censor · October 17, 2023, 6:15pm

Ok, I’ll see if I can have a look at this soon

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How to sync Recast with game loop?

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