How does scene.pick works?

Zion_Huang · October 20, 2021, 3:58am

I am very confused about how ‘pick’ works:https://github.com/BabylonJS/Babylon.js/blob/7e081ab717e986d96acf215aeab92ff9e51dd4bc/src/scene.ts#L4672
It seems these inputs are never used, however, scene.pick works very well in practice.

roland · October 20, 2021, 6:07am

Hi!

github.com

BabylonJS/Babylon.js/blob/7e081ab717e986d96acf215aeab92ff9e51dd4bc/src/Culling/ray.ts#L817

    
      
                  predicate,

                  fastCheck,

                  true

              );

              if (result) {

                  result.ray = this.createPickingRay(x, y, Matrix.Identity(), camera || null);

              }

              return result;

          };

          

          Scene.prototype.pick = function (x: number, y: number, predicate?: (mesh: AbstractMesh) => boolean, fastCheck?: boolean, camera?: Nullable<Camera>, trianglePredicate?: TrianglePickingPredicate): Nullable<PickingInfo> {

              if (!PickingInfo) {

                  return null;

              }

              var result = this._internalPick(

                  (world) => {

                      if (!this._tempPickingRay) {

                          this._tempPickingRay = Ray.Zero();

                      }

          

                      this.createPickingRayToRef(x, y, world, this._tempPickingRay, camera || null);

Zion_Huang · October 20, 2021, 7:22am

Thx! I just learn a little bit how prototype works in js

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How does scene.pick works?

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