Geometries

Some usefull 3D geometries are included in the project. They are located in the folder Assets/my3Dgeometries. The included geometries are the intial pointers, the force (arrow point and body) and several constraints:

• Hinge

• Roller

• Fixed

3D models

Note that all the goemetries miss the common “cylinder” because it is used as a second object to marker the position.

Similarly, the force is splitted into body and arrow head.

Sizes and positions

Each imported 3D geoemtriy is treateed as a Unity prefab with attached:

• UpdateMaterialProperties.cs script to update the material properties based on the RayCasting.

• Collider surface and script for the Meta Ray Interaction

• SelectionManager.cs script to manage the selection of the object

• RayComputation.cs script to manage the ray casting and the interaction with the object.

• InteractableUnityEventWrapper.cs script to manage the interaction with the object.

• Movements script like LoadMovement or ConstraintMovement to manage the movement of the object.

3D geometry:

Parent object:

Scale adjustment

Each geoemtry is normalized and then rescaled proportianlly to the beam section.

public void NormalizeObject(GameObject obj, char? flag = null)
  {
      // Find the MeshFilter in the object or its children
      MeshFilter meshFilter = obj.GetComponentInChildren<MeshFilter>();
      if (meshFilter != null)
      {
          Bounds bounds = meshFilter.mesh.bounds;// Get the mesh bounds in local space

          if (largestDimension > 0)
          {
              // Compute the scale factor to normalize the largest dimension to 1
              float scaleFactor = 1.0f / largestDimension;
              // Rescale the object
              meshFilter.transform.localScale *= scaleFactor;
              Quaternion targetRotation = Quaternion.Euler(-90, 0, 0); // Rotate 90° around X-axis
              meshFilter.transform.rotation = targetRotation;
              Renderer renderer = obj.GetComponentInChildren<Renderer>();

              SetPointerDimensionScaled(pointerDimension * scaleFactor, obj);

              if (renderer != null && loadsMaterial != null)
              {
                  // Assign the material
                  renderer.material = loadsMaterial;
                  Debug.Log($"Assigned custom material to {obj.name}");
              }
              else
              {
                  Debug.LogWarning($"Renderer or custom material not found for {obj.name}");
              }

          }
          else
          {
              Debug.LogError($"Bounds size is zero for {obj.name}. Cannot normalize.");
          }
      }
      else
      {
          Debug.LogError($"No MeshFilter found in {obj.name} or its children.");
      }
  }