raycast method

@override void raycast(Raycaster raycaster, List<Intersection> intersects)

Get intersections between a casted ray and this mesh. Raycaster.intersectObject will call this method, but the results are not ordered.

Implementation

@override
	void raycast(Raycaster raycaster,List<Intersection> intersects ) {
		final visibility = _visibility;
		final active = _active;
		final drawRanges = _drawRanges;
		final geometryCount = _geometryCount;
		final matrixWorld = this.matrixWorld;
		final batchGeometry = geometry;

		// iterate over each geometry
		_mesh.material = material;
		_mesh.geometry?.index = batchGeometry!.index;
		_mesh.geometry?.attributes = batchGeometry!.attributes;

		_mesh.geometry?.boundingBox ??= BoundingBox();
		_mesh.geometry?.boundingSphere ??= BoundingSphere();

		for ( int i = 0; i < geometryCount; i ++ ) {
			if ( ! visibility[ i ] || ! active[ i ] ) {
				continue;
			}

			final drawRange = drawRanges[ i ];
			_mesh.geometry?.setDrawRange( drawRange.start, drawRange.count );

			// ge the intersects
			getMatrixAt( i, _mesh.matrixWorld )?.premultiply( matrixWorld );
			getBoundingBoxAt( i, _mesh.geometry?.boundingBox );
			getBoundingSphereAt( i, _mesh.geometry?.boundingSphere );
			_mesh.raycast( raycaster, _batchIntersects );

			// add batch id to the intersects
			for (int j = 0, l = _batchIntersects.length; j < l; j ++ ) {
				final intersect = _batchIntersects[ j ];
				intersect.object = this;
				intersect.batchId = i;
				intersects.add( intersect );
			}

			_batchIntersects.length = 0;
		}

		_mesh.material = null;
		_mesh.geometry?.index = null;
		_mesh.geometry?.attributes = {};
		_mesh.geometry?.setDrawRange( 0, double.maxFinite.toInt() );
	}