Roblox Corporation

Implementations described herein relate to methods, systems, and computer-readable media for 2D control over a 3D virtual environment. A method may include providing a 3D virtual experience, receiving first indication that the avatar is within a threshold distance of at least one interactive displayed graphical element and second indication that the at least one interactive displayed graphical element is within a viewport, receiving an activation signal to activate a 2D interaction mode, automatically providing a projection of the at least two portions onto a 2D plane within the viewport associated with the avatar responsive to the activation signal and the indications, receiving a selection of one or more of the bounding box representations, and performing a function associated with the selection, the function identical to an associated function of the at least one interactive graphical element.

Implementations described herein relate to methods, systems, and computer-readable media for 2D control over a 3D virtual environment. A method may include providing a 3D virtual experience, receiving first indication that the avatar is within a threshold distance of at least one interactive displayed graphical element and second indication that the at least one interactive displayed graphical element is within a viewport, receiving an activation signal to activate a 2D interaction mode, automatically providing a projection of the at least two portions onto a 2D plane within the viewport associated with the avatar responsive to the activation signal and the indications, receiving a selection of one or more of the bounding box representations, and performing a function associated with the selection, the function identical to an associated function of the at least one interactive graphical element.

Some implementations related to methods, systems, and computer-readable media for determining object viewability within a multi-dimensional virtual experience. In some implementations, a computer-implemented method includes placing at least one bot at one or more virtual locations in the multi-dimensional virtual experience; rotating a viewport through one or more orientations; and at the one or more orientations, and for one or more objects located in the multi-dimensional virtual experience, determining a viewability of the one more objects from the vantage of the at least one bot; and for the one or more objects, calculating a viewability as a function of the determined viewability; and generating a data structure comprised of the viewability of the one or more objects.

Various implementations relate to methods, systems, and non-transitory computer-readable media for autoregressive shape generation. In some implementations, a computer-implemented method includes obtaining an input mesh corresponding to a three-dimensional (3D) object. The computer-implemented method further includes partitioning the input mesh into a plurality of 3D cells. Each of the plurality of 3D cells may correspond to a respective root node of a plurality of root nodes of a tree structure. The computer-implemented method further includes, for each of the plurality of 3D cells, generating a respective first variable-length latent value that is a function of a surface complexity of a shape located in a corresponding 3D cell.

Some implementations relate to methods, systems, and computer-readable media to generate 3D objects including 3D meshes and 3D cages. A signed distance function (SDF) approximant for a 3D mesh is determined by combining radial basis functions (RBFs) originating on the 3D mesh. A cage for the 3D mesh is generated by positioning cage vertices using the SDF approximant such that the cage overlays the 3D mesh. The generated 3D object includes the 3D mesh and the cage.

Implementations described herein relate to methods, systems, and computer-readable media for computer-assisted graphical development. In some implementations, a computer-implemented method includes providing a first graphical user interface (GUI) that includes at least one manipulable graphical object, receiving a request to implement a movement feature for the at least one manipulable graphical object, and in response to the request, automatically positioning a movement detector object in relation to the at least one manipulable graphical object and logically coupling the movement detector object to the at least one manipulable graphical object.

Some implementations relate to methods, systems, and computer-readable media for inferring a skeletal structure to create a practical 3D asset. A user may create an avatar using different parts from different parent models. Upon creation, a data model for the avatar is examined to determine joint placement and infer an overall skeletal structure. Thereafter, different skinning techniques may be used to deform the avatar skin during animations based on the joint placement and movement.

Some implementations relate to methods, systems, and computer-readable media for providing mesh retopology for improved animation of three-dimensional avatar heads. The system receives a three-dimensional mesh that is a representation of an avatar head; defines local coordinate frames relative to geometric features of the mesh; utilizes a machine learning model to predict frame fields based on these features; blends the predicted frame fields to calculate unified directional constraints for each mesh face element; and applies quad meshing techniques to extract a quad mesh representation of the avatar head.

Implementations relate to methods, systems, and computer-readable media to detect connected solid regions in solid geometry objects. In some implementations, the method may include obtaining a mesh for a three-dimensional (3D) object, wherein the mesh includes a plurality of polygons, identifying, based on the plurality of polygons, connected components of the 3D object, determining, based on the connected components, two or more topologically interconnected sections of the 3D object, identifying a containment relationship between the two or more topologically interconnected sections of the 3D object, determining, based on the containment relationship, one or more distinct solid regions of the 3D object, determining an updated state of a first distinct solid region of the 3D object, wherein the updated state includes an updated position or an updated orientation, and causing the first distinct solid region of the 3D object in the updated state to be displayed within a virtual environment.

Some implementations relate to methods, systems, and computer-readable media to display a rigid body object within a virtual environment. In some implementations, the method includes obtaining a model representation of the rigid body object, obtaining a state of the rigid body object in the virtual environment, determining a plurality of constraints that act on the rigid body object, determining a plurality of Jacobians and a plurality of Hessians, wherein each Jacobian of the plurality of Jacobians and each Hessian of the plurality of Hessians is associated with a corresponding constraint of the plurality of constraints, applying a two-stage primal solver to a set of equations of motion for the rigid body object based on the plurality of Jacobians and the plurality of Hessians, and displaying the rigid body object in the updated position in the virtual environment.