54 results about "Volume modeling" patented technology

The invention provides a cuttable interactive software simulation method and system based on a GPU accelerated substance point method, and belongs to the field of computer graphics physical simulation, and the method comprises the steps: S1, carrying out the sampling and initialization of a to-be-simulated three-dimensional software model and a rigid body model interacting with the to-be-simulated three-dimensional software model; s2, based on a virtual scene to be simulated, constructing an initial GPU secondary sparse acceleration structure Ggrid; s3, carrying out expansion on the Ggrid; s4, updating the state of the rigid body model, and constructing a rigid body cutting field of Ggrid; s5, on the basis of the Ggrid and the rigid body cutting field, the physical explicit integral of the three-dimensional software model to be simulated is solved in parallel, and the position of the lagrangian particle at the next moment is obtained; and S6, during the last iteration of each frame, reconstructing a surface triangular mesh of the Lagrange particle cluster in real time based on Ggrid, and smoothing the surface triangular mesh. According to the method disclosed by the invention, multi-material soft deformation, cutting interaction, crushing and real-time surface reconstruction are realized.

The invention provides a method and a system for reconstructing a high-precision complete shape and texture of an object in a scene. The method comprises the following steps: acquiring a visual three-dimensional grid G, optimizing the visual three-dimensional grid G, performing visual modeling of a three-dimensional scene space, and acquiring a three-dimensional grid optimization visual model; through decomposition type nerve implicit reconstruction of the generation diffusion model prior, the potential generation diffusion model prior is used for filling object missing information of an object invisible area or an occluded area, and combined scene reconstruction is carried out; optimizing a visibility model through a three-dimensional grid, dynamically adjusting the prior loss weight of a potential generation diffusion model, forming a generation prior consistent with the input in a visible region, and performing object shape enhancement; and after the object shape enhancement is completed, three-dimensional grid representation is exported from the implicit field, object texture enhancement is carried out, and a high-precision complete object 3D model with complete texture of each object is precisely reconstructed.

The invention discloses a real-time software deformation interaction method based on a physical engine in an environment. The real-time software deformation interaction method comprises the following steps: S1, establishing a virtual environment and a software model; s2, constructing an interactive perception and collision detection network; s3, receiving and analyzing a multi-modal interaction instruction; s4, real-time deformation calculation based on a physical engine; s5, performing multi-user collaborative state synchronization and rendering feedback; and S6, carrying out fault state simulation on the software object. According to the method, real-time and high-precision simulation of software deformation is realized through deep fusion of software dynamics calculation of a physical engine and an interaction instruction stream, and through hierarchical physical attribute binding and client prediction, the network synchronization data volume is greatly reduced while the millimeter-level deformation precision is ensured, so that the network synchronization efficiency is improved. And low-delay and high-consistency experience under multi-person cooperative operation is ensured.

The invention discloses a digital twinning-oriented animation linkage method and device, equipment and a storage medium. The method comprises the steps that based on classes in a domain ontology model and attributes of the classes, operation data of the Internet of Things system are converted into first semantic data, and the domain ontology model comprises an environment class, an equipment class and a behavior class; performing event identification on the first semantic data to obtain a first event; reasoning the first event based on a preset reasoning rule set to obtain a first reasoning result, the first reasoning result comprising a first response behavior for the first event; and controlling a digital twinborn body corresponding to the Internet of Things system to execute an animation matched with the first response behavior. Therefore, a closed-loop control chain of data driving, semantic recognition, event reasoning and animation linkage is formed, high reliability is achieved, complex dynamic linkage is supported, and therefore intelligent, automatic and visual expression of the system is effectively improved.

The invention relates to the technical field of three-dimensional modeling, and provides a lightweight hierarchical digital twin modeling and rendering method for a large-scale scene. The method comprises the following steps: analyzing the surface geometry of an original high-precision three-dimensional model, calculating and extracting curvature characteristics of the high-precision three-dimensional model corresponding to each local area, and constructing curvature response distribution through the curvature characteristics; screening and judging each model region corresponding to the original high-precision three-dimensional model based on the obtained curvature response distribution and the dynamic curvature threshold, and obtaining a second key detail region; generating an independent multi-resolution detail enhancement data block for the second key detail area, generating a plurality of data versions with gradually decreased detail degrees for the same second key detail area, and forming a multi-resolution detail library capable of being directly indexed; in the real-time rendering stage, seamless fusion rendering is completed according to the detail data blocks and the basic main body model, and unification of overall scene light weight and local detail high fidelity is achieved.

A system, method, and computer-readable medium having machine instructions provides for predicting geometric shape accuracy of 3D printed products. Such a prediction may involve developing a model of an object and determining ways in which an actually-manufactured 3D object corresponding to the model differs in real life. These differences correspond to shape deviations. Shape deviations may be process dependent and / or path dependent, and different layers of the object as well as the manufacturing process to make the different layers may introduce shape deviations in layers of the object. By developing a transfer functions of the manufacturing process and associated interlayer effects of the layers and then appropriately offsetting inputs to the manufacturing process, the shape deviations may be ameliorated.

The present invention provides a method and apparatus for generating textures of a mountain body model, relating to the field of computer graphics technology. The method includes: obtaining the UV coordinates of the target mountain body model on each two-dimensional plane in three-dimensional space; respectively sampling the mountain body base texture map according to the UV coordinates to obtain the textures of the target mountain body model in each dimension direction in three-dimensional space; performing a blending process on the textures of the target mountain body model in each dimension direction in three-dimensional space according to the weights of the normal vectors of the vertices of the target mountain body model in each dimension direction in three-dimensional space to generate a target texture map; dividing the target texture map into at least two regions based on height information and assigning corresponding influencing factors to implement texture mapping of the target mountain body model based on the target texture map. Through the above method, the technical problems of high production cost and low reduction degree existing in the prior art can be alleviated, and the effect of improving the reduction accuracy of mountain body textures is achieved.

The present invention provides a 6dof object pose estimation method based on a single RGB image, which belongs to the field of computer vision and computer graphics technology, including feature extraction, three-dimensional point cloud reconstruction and pose estimation of RGB images. Feature extraction is achieved by building a feature extraction network architecture. Three-dimensional point cloud reconstruction is to first obtain the intermediate information of the object based on the various low-level (geometry, reflectivity) and high-level (connectivity, symmetry) characteristics of the object, and then further generate a 3D point cloud model of the object. Pose estimation uses a heterogeneous network to process RGB data and point cloud data respectively, integrates the features of the two data through a fusion network, thereby predicting the pose information of the object. The 6dof object pose detection method proposed in the present invention focuses on the problems such as small data volume, difficult acquisition of RGBD data format, and no object 3D model, and can ensure the accuracy and generalizability of target object pose detection, and can be effectively applied to real scenes.

The present invention discloses a solid-liquid coupling simulation method with surface tension effect based on the material point method, belonging to the fields of computer graphics and physics-based simulation. The system used in the simulation method includes solid model modeling, fluid model modeling, Level Set implicit surface construction, Marching Cubes display surface construction, surface particle resampling, and collision detection. The system simulates fluids and solids on the basis of the material point method, constructs Level Set to resample fluid surface particles, and adds surface tension to the fluid using the CSF model. Different background grids are used to simulate fluids and solids respectively to solve the inherent adhesion phenomenon during MPM solid-liquid coupling and achieve the slip contact effect during solid-liquid coupling. Finally, the coupling phenomenon of incompressible fluid with surface tension effect and nonlinear elastic solid is realized.

The application provides a method and device for generating a proxy model in a virtual scene, a computer device and a storage medium. The method comprises the following steps: obtaining potential visible set information of a virtual scene and object models in the virtual scene; obtaining a visible bounding box of the object models based on the potential visible set information of the virtual scene; obtaining a model bounding box of the object models; clustering the object models according to the model bounding box and the visible bounding box of the object models to obtain a plurality of target object clusters; generating a visible bounding box of the target object clusters according to the visible bounding box of each object model under the target object clusters; generating a proxy model corresponding to the target object clusters; and determining a model application position point of the proxy model based on the visible bounding box of the target object clusters. The proxy model corresponding to each target object cluster and the application position range thereof are used to reduce DrawCall and game picture loading overhead while ensuring the picture effect of the game picture and avoiding the degradation of the game picture.

The application provides a cuttable interactive soft body simulation method and system based on a GPU accelerated material point method, and belongs to the field of computer graphics physics simulation, and comprises the following steps: S1: sampling and initializing a three-dimensional soft body model to be simulated and a rigid body model interacting with the three-dimensional soft body model; S2: constructing an initial GPU secondary sparse acceleration structure Ggrid based on a virtual scene to be simulated; S3: extending the Ggrid; S4: updating the state of the rigid body model and constructing a rigid body cutting field of the Ggrid; S5: solving a physical explicit integration of the three-dimensional soft body model to be simulated in parallel based on the Ggrid and the rigid body cutting field, and obtaining the position of a Lagrange particle at the next time; and S6: at the last iteration of each frame, reconstructing a surface triangular mesh mesh of the Lagrange particle cluster in real time based on the Ggrid, and smoothing the surface triangular mesh mesh. The method realizes multi-material soft body deformation, cutting interaction, fragmentation and real-time surface reconstruction.

The invention provides a three-dimensional object model generation method and device, a storage medium and computer equipment, and the method comprises the steps: obtaining a single view, determining multiple views, carrying out the prediction of a normal diagram of the multiple views, obtaining a prediction normal diagram, carrying out the iteration updating of a determined initial three-dimensional model, obtaining a target three-dimensional model, and carrying out the calculation of the target three-dimensional model. The target three-dimensional model is rendered to obtain a rendering normal diagram corresponding to the target three-dimensional model, then noise superposition is performed on the multiple views, a new multiple view is generated by combining the single view and the rendering normal diagram, and the step of determining the multiple views and the subsequent steps are continuously executed. And obtaining the latest multi-view and the latest target three-dimensional model until a preset condition is met. In the process, a rendering normal graph obtained based on the target three-dimensional model has spatial consistency, so that a two-dimensional multi-view conforming to the spatial consistency of the three-dimensional structure is subsequently generated, the multi-view serves as initial data of next iteration, and the consistency and precision of the target three-dimensional model are continuously improved through iteration.

Embodiments of the present disclosure disclose a method, apparatus, device, and storage medium for generating special effect images. Scale and / or translate the initial surface texture map of the 3D virtual fluid model to obtain at least one transformed surface texture map; determine the offset of each vertex in the longitudinal axis direction according to the initial surface texture map and the at least one transformed surface texture map; move each vertex in the longitudinal axis direction according to the offset to obtain a static image of the 3D virtual fluid model after offset; splice and encode consecutive static images to obtain a dynamic special effect image corresponding to the 3D virtual model. The method for generating special effect images provided by the embodiments of the present disclosure determines the offset of each vertex in the longitudinal axis direction according to the initial surface texture map and at least one transformed surface texture map, and moves each vertex in the longitudinal axis direction according to the offset, so that the generated dynamic special effect image has the effect of liquid flow and improves the authenticity of the liquid flow image.

Disclosed is a method for encoding 3D volumetric data to estimate pose and shape data from 3D volumetric data, generate a 3D estimation model by applying the estimated data to a 3D template model, and encode residual data of the 3D volumetric data together with the 3D estimation model, and the method includes: (a) receiving 3D volumetric data; (c) estimating a 3D pose from the 3D volumetric data; (d) estimating a 3D shape from the 3D volumetric data; (e) generating a 3D estimation model by modifying a predefined 3D template model; (f) calculating a residual of the 3D volumetric data with respect to the 3D estimation model; and (h) generating the pose estimation data, the shape estimation data and data on the residual as transmission data. Accordingly, an amount of data in the 3D volumetric model is significantly reduced and complexity is reduced.

The invention discloses a rapid skeleton modeling method based on CATIA. Automatic modeling of a steel truss skeleton is achieved through a bridge parameter EXCEL table and a packaged UDF. The method comprises the steps of calling parameter table data by utilizing an EKL language, generating and numbering upper / lower chord nodes in batches, generating chord members, web members and transverse connection lines, constructing a geometric figure set, calling UDF to generate an envelope body model, and supporting a parameter modification rapid iteration model. Structured numbering is adopted for nodes and components, and quick replacement is achieved by associating a section parameter library. The UDF has sweeping and cross section functions, entity generation is driven through a sub geometric figure set, and the node plate is automatically generated through chord member / web member connecting lines. According to the method, modeling efficiency and parameterization level are improved, and the method is suitable for rapid design of steel truss bridges of different structural forms.

The invention discloses an ontology-based digital prototype maintenance information semantic mapping method and system, and is applied to the technical field of digital prototype maintenance. The method comprises the following steps of: converting natural language data into maintenance-related text data in an RDF (Resource Description Framework) form; sorting and classifying maintenance concepts needing to be represented by the digital prototype based on a 5M classification method; constructing a maintainability ontology model on the basis of the sorted and classified maintenance concepts; and mapping the maintainability ontology model to a digital prototype STEP data model. According to the mapping method from the maintainability ontology to the STEP data model, gradual conversion from an abstract concept to a specific instance is achieved, digital prototype maintainability information is organized into a structured semantic network through mapping, understanding, retrieval and management are easier, and the method is suitable for popularization and application. The high-level concept in the ontology and the detail information of each module of the STEP data model form a corresponding relationship, so that the maintenance engineer can quickly switch between the global situation and the details.

The invention discloses a lightweight accelerated calculation method for a large assembly model, which is used for performing parallel calculation on quadratic error measurement QEM of an industrial three-dimensional assembly and an approximate curvature optimization simplification algorithm of the industrial three-dimensional assembly based on an OpenMP parallel calculation framework, and solves the problems of low simplification efficiency, poor real-time performance and difficulty in considering precision and efficiency of a large-scale industrial three-dimensional model in the prior art. Through an OpenMP parallel framework, a QEM algorithm and an approximate curvature optimization algorithm are subjected to thread-level acceleration, the model simplification efficiency is remarkably improved, the average speed-up ratio reaches 4.5 times, meanwhile, the geometric accuracy and topological consistency of the model are effectively reserved, and the method is suitable for resource sensitive scenes such as mobile terminal loading, real-time rendering and virtual reality; the invention further comprises a computer system for implementing the light-lining accelerated calculation method for the large assembly model.

The invention discloses a method and device for generating a three-dimensional live-action model, and relates to the technical field of three-dimensional modeling, and the method comprises the steps: collecting live-action spatial data; extracting object information and scene information in the live-action spatial data, and establishing a live-action model; splitting the real scene model in the rendering system to form single models; editing the monomer model; and rendering the edited monomer models and a model formed by combining the monomer models to obtain a three-dimensional live-action model. According to the invention, the universal space acquisition equipment can be used for quickly acquiring the data of people, objects and scenes in the real scene, the three-dimensional real scene space structure can be automatically restored and reconstructed based on the modeling algorithm, the modeling algorithm is low in cost and high in precision, and the requirements of a rendering system are met. And import and seamless joint display in a studio rendering system are supported, splitting and selection can be carried out in the studio rendering system, three-dimensional space movement, material replacement and real-time rendering output are carried out, and program content generation is assisted.

The invention discloses a zero-sample unknown object 3D pose estimation method based on two-stage RGB-D fusion. Comprising the following steps: giving a 3D model of an unknown object, and rendering the 3D model of the unknown object under different viewpoints to generate a series of RGB-D template images; based on a feature embedded network PoseFusion, texture features and geometric features are extracted from an RGB template image and a Depth template image through a modified ResNet50 network, and then a series of template scene features are generated through two-stage fusion of the texture features and the geometric features. Similarly, a real RGB-D image obtained by shooting an unknown object is also embedded into a real scene feature through PoseFusion. And finally, matching the real scene features with the series of template scene features by calculating occlusion local similarity, so that the 3D pose of the unknown object is determined as the matched template 3D pose.

The present invention belongs to the technical field of game development, and specifically discloses a method for calculating the fluid flow velocity in a closed fluid model. The method includes: calculating the flow velocity vector Vp of an arbitrary point P in the fluid model to be processed, including: determining the first polyhedron or polygon where the arbitrary point P is located according to the coordinate data of the arbitrary point P, obtaining the coordinate data of each vertex Zi of the first polyhedron or the first polygon, where i is a positive integer for indicating different vertices; obtaining the flow velocity vector V0i of each vertex Zi of the first polyhedron or polygon; calculating the centroid coordinate M of the arbitrary point P in the first polyhedron or polygon according to the coordinate data of the arbitrary point P; and calculating the flow velocity vector Vp of the arbitrary point P according to the flow velocity vector V0i of each vertex Zi of the first polyhedron or polygon and the centroid coordinate M. The advantage of the present invention is that it can achieve the flowing effect of the water body part in the game scene, including the movement effect of floating objects in the water body.

Embodiments of the present application disclose a virtual model animation generation method and device, computer equipment and a storage medium. The method comprises the following steps: obtaining a target controller of a target virtual model; obtaining a source virtual model corresponding to a source animation; obtaining movement parameters of the source virtual model corresponding controller in each frame of sub-animation in the source animation; determining a target body model posture corresponding to each frame of sub-animation of the target virtual model according to the movement parameters of the corresponding controller of each frame of sub-animation, an initial body model posture corresponding to each frame of sub-animation of the target virtual model, and a specified body model posture; and generating a target animation of the target virtual model based on the target body model posture corresponding to each frame of sub-animation of the target virtual model. The embodiments of the present application adjust the bone data corresponding to the virtual model through the controller parameters corresponding to the target animation, thereby improving the applicability of the same animation effect in different virtual models, and improving the production efficiency.

The present disclosure provides a method, device, electronic device and readable storage medium for generating a fluid interaction effect. The method comprises: generating a fluid primitive model according to the size of a virtual object in response to a rendering instruction for the fluid interaction effect; obtaining a fluid model based on the fluid primitive model by splicing; obtaining surface distance field data and depth distance field data corresponding to the interaction between the virtual object and the fluid model in a virtual scene; mapping a preset fluid texture map to the fluid model, and setting the preset fluid texture map to move on the surface of the fluid model over time; generating a wake waveform mask map and a bypass waveform mask map corresponding to the interaction between the virtual object and the fluid model in the virtual scene according to the surface distance field data and the depth distance field data; displacing the fluid model according to the preset displacement map, the wake waveform mask map and the bypass waveform mask map; rendering and displaying the virtual object and the displaced fluid model to obtain the fluid interaction effect between the virtual object and the fluid model.

The invention relates to the technical field of three-dimensional modeling, discloses a method and a device for calculating and displaying the position of the shortest distance between three-dimensional model objects, electronic equipment, a computer readable storage medium and a computer program product, and aims to solve the problems that the efficiency is low when the shortest distance between the three-dimensional model objects is calculated and displayed; and a large amount of computing resources need to be consumed. The method comprises the following steps: respectively generating bounding boxes of a first object model and a second object model, connecting center points of the two bounding boxes to generate a model center connecting line segment, and generating a distance calculation range; respectively screening out vertexes coinciding with the distance calculation range from the first object model and the second object model, respectively selecting the vertexes to obtain a plurality of vertex pairs from different object models, and selecting a pair of vertex pairs with the shortest spatial distance from the vertex pairs as target vertexes, and displaying the shortest distance position of the first object model and the second object model based on the target vertex.

The invention relates to a three-dimensional stratum anti-drilling attribute volume modeling method and device, a medium and equipment. The three-dimensional stratum anti-drilling attribute volume modeling method comprises the following steps that different types of data are obtained; sampling different types of data into the stratigraphic grid model; according to data in the stratum grid model, a plane constraint model of the stratum anti-drilling attribute is constructed; according to the data in the stratum grid model, constructing a longitudinal constraint model of the stratum anti-drilling attribute; combining the plane constraint model of the formation anti-drilling attribute with the longitudinal constraint model of the formation anti-drilling attribute to obtain a three-dimensional constraint model of the formation anti-drilling attribute; and constructing based on the three-dimensional constraint model of the formation drilling resistance attribute and different types of data to obtain a formation three-dimensional drilling resistance attribute volume model. According to the method, effective fusion of data of different dimensions is realized, professional technical barriers among different types of data are solved, and convenient and rapid visual support is provided for deep understanding of drilling resistance characteristics of regional strata, implementation of field drilling operation and the like.

Disclosed is a method for encoding 3D volumetric data to estimate pose and shape data from 3D volumetric data, generate a 3D estimation model by applying the estimated data to a 3D template model, and encode residual data of the 3D volumetric data together with the 3D estimation model, and the method includes: (a) receiving 3D volumetric data; (c) estimating a 3D pose from the 3D volumetric data; (d) estimating a 3D shape from the 3D volumetric data; (e) generating a 3D estimation model by modifying a predefined 3D template model; (f) calculating a residual of the 3D volumetric data with respect to the 3D estimation model; and (h) generating the pose estimation data, the shape estimation data and data on the residual as transmission data. Accordingly, an amount of data in the 3D volumetric model is significantly reduced and complexity is reduced.

The invention discloses a stiffened dot matrix parametric modeling method for a complex curved surface skin and a computer product thereof, and the method comprises the steps: defining a three-dimensional design domain, and generating a complex curved surface composed of grids; defining a geometric topological structure of the reinforced dot matrix unit, and assembling the reinforced dot matrix unit and the skin to form a micro unit; mapping the micro-units to the complex curved surface by using an isoparametric mapping technology; the thickness and the width of the reinforced dot matrix unit are adjusted in a user-defined mode, an implicit geometric solid model is generated, and the model is output in a grid data format. According to the method, by means of an implicit geometric algorithm and a grid generation technology, parameterized modeling of the skin dot matrix reinforced structure of complex curved surfaces such as a capped cone or a cylinder is rapidly achieved.

Aspects of this technical solution can, according to a multitude of cameras oriented towards the surface of a three-dimensional (3D) model with a surface containing a two-dimensional (2D) texture model, receive input according to corresponding views from the multitude of cameras of the 2D texture model on the surface of the 3D model and, according to the input and according to a model configured to generate a two-dimensional (2D) image, generate an output containing a 2D texture for the 3D model, the output being generated in response to receiving a specification of the 3D model and the 2D texture.

The present invention belongs to the technical field of 3D modeling, and provides a 3D model design method, system, storage medium and device based on fluid simulation. Among them, the method includes converting 3D model parameters into fluid simulation parameters, and then simulating the corresponding fluid particle state information based on the initial parameters of the fluid simulation system; sequentially performing hole filling and surface reconstruction based on the fluid particle state information to obtain a corresponding fluid model; screening out the fluid models meeting preset requirements to obtain corresponding 3D models for 3D printing.