JPWO2020212293A5

JPWO2020212293A5 -

Info

Publication number: JPWO2020212293A5
Application number: JP2021559774A
Authority: JP
Publication date: 2023-02-22

Claims

A method of aligning a first virtual object with a second virtual object within a scene volume in 3D virtual space, the second virtual object being different from the first virtual object, the method comprising:
performing a 3D scan of a user's head, wherein the first virtual object comprises a 3D scan of the user's head and the second virtual object comprises a 3D model of a mask;
determining a position of a first surface point on the surface of the first virtual object based on a first raycasting of the first virtual object, wherein the first raycasting is performed on the scene ; originating from the outside of a volume and being in a direction from the outside of the scene volume to the inside of the scene volume;
determining a position of a second surface point on the surface of the second virtual object based on a second raycasting of the second virtual object, wherein the second raycasting is performed on the scene; from the inside of the volume toward the outside of the scene volume in a direction away from the center of the scene volume , the second surface point having a desired positional relationship with respect to the first surface point; wherein, in said desired positional relationship, an inner surface of said 3D model of said mask lies flush with a surface of said 3D model of said user's head;
determining a relative position between the position of the first surface point and the position of the second surface point; and adjusting the position of the second surface point based on the relative position. Method.

2. The method of claim 1, wherein adjusting the position of the second surface point comprises adjusting the position of the second virtual object.

3. The method of claim 1 or 2, wherein the method steps are repeated for a plurality of surface points on the first virtual object and a corresponding plurality of surface points on the second virtual object.

4. The method of claim 3, wherein adjusting the positions of the second surface points comprises deforming the second virtual object based on the adjusted positions of the second surface points.

Deforming the second virtual object includes adjusting positions of additional second surface points based on the adjusted second surface point positions of the plurality of second surface points. 5. The method of claim 4, comprising:

The 3D model of the mask is
CPAP mask,
medical sensory equipment,
hearing aid,
cervical brace,
dental equipment, e.g. orthodontic appliances,
eyewear, e.g. eyeglasses headphones,
virtual reality headset,
6. The method of any one of claims 1-5, comprising one or more of: visualization of post-operative scars; and an implant.

7. A method according to any one of the preceding claims, said method comprising the step of pre-aligning said first virtual object and said second virtual object.

The method includes:
8. The method according to any one of claims 1 to 7, further comprising the steps of: deforming said first virtual object; and deforming said second virtual object based on said deformation of said first virtual object. the method of.

A computer program, comprising computer program code means adapted to perform a method according to any one of claims 1 to 8, when said computer program is run on a computer.

A system for aligning a first virtual object with a second virtual object within a scene volume in 3D virtual space, said second virtual object being different from said first virtual object, said system teeth,
a scanner adapted to generate a 3D model of the user's head based on a scan of the user's head; and a processor, the processor comprising:
receiving a 3D model of the user's head from the scanner as the first virtual object, the second virtual object comprising a 3D model of a mask;
determining a position of a first surface point on a surface of the first virtual object based on a first raycasting of the first virtual object, the first raycasting outside the scene volume; originating from and going from the outside of the scene volume to the inside of the scene volume;
determining a position of a second surface point on the surface of the second virtual object based on a second raycasting of the second virtual object, the second raycasting inside the scene volume; , toward the outside of the scene volume toward the direction away from the center of the scene volume , the second surface point having a desired positional relationship with respect to the first surface point, and the desired position of In a positional relationship, the inner surface of the 3D model of the mask lies flush with the surface of the 3D model of the user's head.
determining a relative position between the position of the first surface point and the position of the second surface point; and adjusting the position of the second surface point based on the relative position. ,system.

11. The system of claim 10, said system further comprising a display adapted to display said scene volume to a user.