WebXRNearInteraction: TypeError subMesh.projectToRef is undefined

FrameVRWill · November 9, 2021, 12:06am

BabylonJS/Babylon.js/blob/e81ec013419abe0b41972617201360c0167b7aa9/src/XR/features/WebXRNearInteraction.ts#L720

    
      
          let tmp, tmpDistanceSphereToCenter, tmpDistanceSurfaceToCenter;

          const center = TmpVectors.Vector3[2];

          const worldToMesh = TmpVectors.Matrix[0];

          worldToMesh.copyFrom(mesh.getWorldMatrix());

          worldToMesh.invert();

          Vector3.TransformCoordinatesToRef(sphere.center, worldToMesh, center);

          

          for (var index = 0; index < subMeshes.length; index++) {

              const subMesh = subMeshes[index];

          

              subMesh.projectToRef(center, <Vector3[]>mesh._positions, <IndicesArray>mesh.getIndices(), tmpVec);

          

              Vector3.TransformCoordinatesToRef(tmpVec, mesh.getWorldMatrix(), tmpVec);

              tmp = Vector3.Distance(tmpVec, sphere.center);

          

              // Check for finger inside of mesh

              tmpDistanceSurfaceToCenter = Vector3.Distance(tmpVec, mesh.getAbsolutePosition());

              tmpDistanceSphereToCenter = Vector3.Distance(sphere.center, mesh.getAbsolutePosition());

              if (tmpDistanceSphereToCenter !== -1 && tmpDistanceSurfaceToCenter !== -1 && tmpDistanceSurfaceToCenter > tmpDistanceSphereToCenter) {

                  tmp = 0;

                  tmpVec.copyFrom(sphere.center);

We’re using the tree-shaking setup with Babylon, and The line above throws TypeError subMesh.projectToRef is undefined when using hand tracking with the TouchHolographicButton.

I can resolve by importing the submesh projection module for its side effects

import "@babylonjs/core/Meshes/subMesh.project";

Perhaps WebXRNearInteraction should be importing this if it requires it, though

RaananW · November 9, 2021, 11:12am

Yes it should. I’ll add it, thanks a lot!

sebavan · November 9, 2021, 4:54pm

This will be in the next nightly

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WebXRNearInteraction: TypeError subMesh.projectToRef is undefined

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