System, method and readable recording medium of controlling virtual model

• US 10,331,819 B2
• Filed: 06/07/2017
• Issued: 06/25/2019
• Est. Priority Date: 08/10/2016
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Park, Jung Min, Lee, Joongjae, Kim, Jisu
• Primary Examiner(s): Wu, Xiao M
• Assistant Examiner(s): Elbinger, Steven Z
• Application Number:
  US15/616,879
• Publication Number:
  US 20180046738A1
• Time in Patent Office: 748 Days
• Field of Search: None
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: G06T 19/006 Mixed reality object pose determination, tracking or camera calibration for mixed reality G06T7/00

Abstract

A method of controlling a virtual model to perform physics simulation to the virtual model in a virtual space includes: generating a first virtual model having a first object physics field which is a range with respect to a first field parameter; generating a second virtual model having a second object physics field which is a range with respect to a second field parameter; when the field parameters are capable of corresponding to each other, checking whether there is a portion where the object physics fields correspond to each other; and when there is a portion where the object physics fields correspond to each other, generating an interaction of the virtual models.

Claims

1. A non-transitory computer-readable recording medium, which comprises commands for executing a method of controlling a virtual model as a processor in an electronic device to perform physics simulation of the virtual model in a virtual space, the method comprising:

generating a first virtual model having a first object physics field defined at least partly in terms of at least one first field parameter which determines whether or not to perform simulation of interaction of the first virtual model with another virtual model based on a range assigned to the at least one first field parameter;

generating a second virtual model having a second object physics field defined at least partly in terms of at least one second field parameter which determines whether or not to perform simulation of interaction of the second virtual model with another virtual model based on a range assigned to the at least one second field parameter;

when the at least one first field parameter and the at least one second field parameter are capable of corresponding to each other, checking whether there is a portion where the first and second object physics fields correspond to each other; and

when there is a portion where the first and second object physics fields correspond to each other, generating an interaction of the first and second virtual models;

wherein meshes of the first and second virtual models are selected from at least one mesh corresponding to at least one preset level of detail (LOD),

wherein the method further comprises changing a mesh of at least one of the first or the second virtual models according to a LOD which is determined in consideration of the portion where the first and second object physics fields overlap each other,

wherein the at least one first field parameter and the at least one second field parameter are respective distances from respective center points of the first and the second virtual models,

wherein the first and the second object physics fields are further defined at least partly by respective spaces located from the respective center points of the first and the second virtual models to a maximum distance,

wherein the meshes of the first and second virtual models are closer to an original shape of the first and second virtual models as the LOD is higher, and

wherein the LOD is determined to be higher as a portion where the first and second object physics fields overlap each other is greater.

2. The non-transitory computer-readable recording medium according to claim 1,

wherein the LOD is determined to be higher when there is the portion where the first and second object physics fields overlap each other, in comparison to a case where there is no portion where the first and second object physics fields overlap each other.

3. The non-transitory computer-readable recording medium according to claim 1,

wherein another first field parameter is complexity of simulation resulting by moving the first virtual model, and

wherein another second field parameter is complexity of simulation of an available motion of the second virtual model.

4. The non-transitory computer-readable recording medium according to claim 1,

wherein the first virtual model has a plurality of first object physics fields and a corresponding plurality of first field parameters,

wherein the second virtual model has a plurality of second object physics fields and a corresponding plurality of second field parameters, and

wherein a priority is set to each of the plurality of first object physics fields and the plurality of second object physics fields, so that the LOD is determined according to overlapping of object physics fields of the plurality of first object physics fields and the plurality of second object physics fields having a high priority.

5. The non-transitory computer-readable recording medium according to claim 1,

wherein an environmental physics field for performance of physics simulation is set in the virtual space, and

wherein as the first and second virtual models enter the environmental physics field, each of the first and second object physics fields is activated to allow physics simulation with respect to the first and second virtual models.

6. The non-transitory computer-readable recording medium according to claim 5,

wherein the environmental physics field is movable and modifiable.

7. The non-transitory computer-readable recording medium according to claim 1,

wherein the at least one mesh comprises a mesh parameter demanded for a motion which is to be implemented by physics simulation, and

wherein during a transition where the at least one mesh is changing according to LOD, the mesh parameter is calculated by adding a value obtained by multiplying the mesh parameter before the changing by a gradually decreasing weight and a value obtained by multiplying the mesh parameter after the changing by a gradually increasing weight.

8. The non-transitory computer-readable recording medium according to claim 1,

wherein the first virtual model has a plurality of first object physics fields defined at least partly in terms of a plurality of first field parameters,

wherein the second virtual model has a plurality of second object physics fields defined at least partly in terms of a plurality of second field parameters, and

wherein in case a part of the first field parameters and a part of the second field parameters correspond to each other and thus ones of the plurality of first object physics fields and the plurality of second object physics fields overlap each other, when another part of the first field parameters and another part of the second field parameters do not correspond to each other, or when the plurality of first object physics fields and the plurality of second object physics fields do not overlap each other even though the other part of the first field parameters and the other part of the second field parameters correspond to each other, an interaction of the virtual models is not generated.

9. A system of controlling a virtual model to perform physics simulation of the virtual model in a virtual space, the system comprising at least one processor configured to execute program commands to implement:

a virtual model generating module configured to generate a virtual model having an object physics field defined at least partly in terms of at least one field parameter which determines whether or not to perform simulation of interaction of the virtual model with another virtual model based on a range assigned to the at least one field parameter;

a field checking module configured to check whether there is a portion where a plurality of object physics fields of corresponding field parameters correspond to each other; and

an interaction generating module configured to generate an interaction of a plurality of virtual models,

wherein the virtual model generating module generates a first virtual model having a first object physics field defined at least partly in terms of a first field parameter and a second virtual model having a second object physics field defined at least partly in terms of a second field parameter, and

wherein when the first and the second field parameters are capable of corresponding to each other and a portion where the first and the second object physics fields correspond to each other is checked by means of the field checking module, the interaction generating module generates an interaction of the first and the second virtual models;

wherein meshes of the first and second virtual models are selected from at least one mesh corresponding to at least one preset level of detail (LOD),

wherein the method further comprises changing a mesh of at least one of the first or the second virtual models according to a LOD which is determined in consideration of the portion where the first and second object physics fields overlap each other,

wherein the at least one first field parameter and the at least one second field parameter are respective distances from respective center points of the first and the second virtual models,

wherein the first and the second object physics fields are further defined at least partly by respective spaces located from the respective center points of the first and the second virtual models to a maximum distance,

wherein the meshes of the first and second virtual models are closer to an original shape of the first and second virtual models as the LOD is higher, and

wherein the LOD is determined to be higher as a portion where the first and second object physics fields overlap each other is greater.

10. A method of controlling a virtual model to perform physics simulation of the virtual model in a virtual space, comprising:

generating a first virtual model having a first object physics field defined at least partly in terms of at least one first field parameter which determines whether or not to perform simulation of interaction of the first virtual model with another virtual model based on a range assigned to the at least one first field parameter;

generating a second virtual model having a second object physics field defined at least partly in terms of at least one second field parameter which determines whether or not to perform simulation of interaction of the second virtual model with another virtual model based on a range assigned to the at least one second field parameter;

when the at least one first field parameter and the at least one second field parameter are capable of corresponding to each other, checking whether there is a portion where the first and second object physics fields correspond to each other; and

when there is a portion where the first and second object physics fields correspond to each other, generating an interaction of the first and second virtual models;

wherein meshes of the first and second virtual models are selected from at least one mesh corresponding to at least one preset level of detail (LOD),

wherein the method further comprises changing a mesh of at least one of the first or the second virtual models according to a LOD which is determined in consideration of the portion where the first and second object physics fields overlap each other,

wherein the at least one first field parameter and the at least one second field parameter are respective distances from respective center points of the first and the second virtual models,

wherein the first and the second object physics fields are further defined at least partly by respective spaces located from the respective center points of the first and the second virtual models to a maximum distance,

wherein the meshes of the first and second virtual models are closer to an original shape of the first and second virtual models as the LOD is higher, and

wherein the LOD is determined to be higher as a portion where the first and second object physics fields overlap each other is greater.