31 results about "Volume modeling" patented technology

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 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 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 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.

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 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 invention discloses a music driving fluid generation method and system based on multi-dimensional semantic mapping, and belongs to the technical field of computer graphics and audio signal processing. The method comprises the following steps that music input by a user is received, characteristics such as rhythm, frequency spectrum and energy are obtained through audio analysis, and emotion vectors and color information changing along with time are obtained through a music emotion recognition and color palette generation module; in a unified parameter space, the audio, emotion and color semantics are mapped into fluid colors, fluid simulation parameters and camera and environment control parameters, and fluid models such as shallow water waves or height fields are driven to generate multi-style fluid scenes changing along with music. Compared with an existing music visualization mode which only depends on frequency band energy to drive simple and special effects, the method can achieve consistent expression of music emotion, rhythm, fluid form and audio-visual atmosphere in multiple scenes, and can be applied to scenes such as music visualization, immersive interactive art display and emotion relaxation assistance.

This invention relates to the field of thin-film water transfer printing technology, and discloses a water transfer printing method for substrates that does not require primer spraying. The method includes: system setup, system calibration, 3D volume modeling, 3D volume pattern construction, 3D entity sampling, comparison of 3D entities with 3D volume models, water transfer film pattern simulation, water transfer film printing, water transfer, film curing, and mass production. This substrate-free water transfer printing method, through an equipment system and industrial camera, achieves uniform movement and real-time trajectory acquisition of the substrate, facilitating analysis and comparison of the travel path, selection of the optimal path for mass production, and optimal uniform speed for mass production. Through the combination of software simulation and hardware equipment, it can solve problems in existing water transfer printing technologies such as cumbersome processes, inaccurate positioning, difficulty in customization, high cost, environmental pollution, and low efficiency. Furthermore, the use of solvent-based adhesives enhances the adhesion of the water transfer ink to the substrate, reducing the cost and environmental pollution associated with pre-coating the substrate with primer.

Provided is a three-dimensional CAD system that is capable of displaying, at high speed, a shape including a curved surface in the form of a CSG representation. The present invention is provided with: a primitive generation unit (11) that generates a primitive by joining the edges of differential polyhedrons to configure curved surfaces and joining the curved surfaces via curved surface boundaries to configure a closed curved surface, the primitive being a set of points belonging to the inside of the closed curved surface, by using a differential polyhedron model, which is a set of differential polyhedrons including the coordinate values of the vertices of triangles, the normal vectors of the vertices of triangles, and curved line elements constituted of initial points and terminal points, as well as tangential vectors of the initial points and the terminal points, the initial points and the terminal points being constituted of the vertices of triangles; a storage unit (2) that stores CSG data representing a solid model in the form of a CSG representation by using a tree structure of set operations for the primitive; and a display processing unit (3) that obtains the intersection between the solid model and a ray from the intersection between the closed curved surface of the primitive and the ray through set operations based on the CSG data, and that calculates the position of reflection and the direction of reflection of the ray in the solid model.

This application relates to the field of 3D modeling technology and provides a lightweight hierarchical digital twin modeling and rendering method for large-scale scenes. The method includes: analyzing the surface geometry of the original high-precision 3D model, calculating and extracting the curvature features of each local region corresponding to the high-precision 3D model, and constructing a curvature response distribution through the curvature features; based on the obtained curvature response distribution and dynamic curvature threshold, filtering and judging each model region corresponding to the original high-precision 3D model to obtain the second key detail region; generating independent multi-resolution detail enhancement data blocks for the second key detail region, and generating multiple data versions with decreasing detail levels for the same second key detail region to form a directly indexable multi-resolution detail library; in the real-time rendering stage, seamlessly merging the detail data blocks with the basic main model to achieve a balance between overall scene lightweighting and high-fidelity local details.

This invention discloses a six-DOF pose estimation method for weakly textured objects. The method generates an object dataset using physically based rendering based on the object's CAD model. A convolutional neural network model with a single encoder and multiple decoders is constructed to obtain the object's prediction mask and high-dimensional feature map. A fully connected network is established to map the input object point cloud into a high-dimensional feature representation. The correlation matrix of the network's output feature map is calculated, and candidate poses are obtained through sampling, calculation, and scoring. The final pose is then refined. This invention completes model training using synthetic data, achieving excellent generalization ability without real-world scene annotation. By modeling the surface of weakly textured objects, it significantly improves the detection accuracy for a large number of industrial parts, demonstrating significant application value.

The application relates to the technical field of computer-aided design, and discloses a BIM model index determination method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a single BIM model; in response to a view creation operation for the single BIM model, generating at least one area view corresponding to the single BIM model; determining an area contour corresponding to each area view according to the at least one area view; and determining area index data of the single BIM model based on the area contours. Through the technical scheme, the corresponding area index data can be automatically counted based on the area contours, manual processing is not needed, the workload of the designer is reduced, and the convenience of area index counting is improved. Meanwhile, the area contour and the area index data can be associated, and when the area contour is readjusted, the area index data will be changed in linkage, so that errors and omissions caused by manual modification are avoided.

The embodiment of the invention discloses a 4D HOI modeling method and device, a storage medium and a program product. The method comprises the following steps: receiving a 3D model of a target object, generating time sequence human body motion based on the guidance of a multi-view structure of the 3D model, cooperatively reconstructing the dynamic state of the object, and obtaining a 4D HOI sample; training a dynamic character interaction generation model by using the 4D HOI sample; calling the trained dynamic character interaction generation model for reasoning, and using a time sequence to guide and sample a human body motion sequence and a target object motion sequence in a reasoning stage; and the human body motion sequence and the target object motion sequence are aligned according to a time sequence and then are combined to generate a 4D HOI sequence. According to the method, various 4D HOI samples can be generated by using the target object 3D model, and the model generalization ability is enhanced, so that the data efficiency is improved, and new objects and new tasks can be quickly adapted.

The invention provides a texture rendering method and device of a stereoscopic model, electronic equipment, a computer readable storage medium and a computer program product. The method comprises the steps that a first three-dimensional model is converted into a second three-dimensional model under a spherical coordinate system, and the coordinate system used by the first three-dimensional model is different from the spherical coordinate system; segmenting the second three-dimensional model into a plurality of sub-models; voxelization is carried out on the multiple sub-models, multiple voxel data sets are obtained, and one sub-model corresponds to one voxel data set; combining a plurality of voxel data sets into a voxel data set of a third stereoscopic model; and rendering the texture of the third stereoscopic model based on the voxel data in the surface area of the third stereoscopic model in the voxel data set of the third stereoscopic model. According to the invention, the efficiency and flexibility of model texture rendering can be improved.

This invention belongs to the field of computer graphics geometry processing technology, specifically relating to an isotropic mesh generation method based on deep learning and mesh parameterization. The method includes acquiring triangular mesh data of an object model; unfolding the triangular mesh data from three-dimensional space to a two-dimensional plane using a mesh parameterization method; inputting the set of Voronoi unit region boundary point coordinates of each vertex into a pre-trained deep neural network to obtain the initial sampling point coordinates of the Voronoi unit region for each vertex; constructing and minimizing a CVT energy function to obtain optimized triangular mesh data on the two-dimensional plane; and mapping the optimized triangular mesh data back from the two-dimensional plane to three-dimensional space using barycentric coordinates. This invention can ensure the quality of the generated mesh while improving computational efficiency.

This application provides a method, apparatus, electronic device, and storage medium for generating animations of biological swarms, relating to the field of animation processing technology. The method includes: responding to a target animation generation instruction and determining the target virtual biological swarm and the motion logic it needs to execute; generating vertex texture animations of individual target biological models based on multiple animation resources; generating a particle swarm that moves in a virtual scene according to the motion logic based on a particle system; calculating the real-time motion state of each particle object in the particle swarm and determining the target behavior state matching the real-time motion state; and rendering and generating a swarm animation corresponding to the target virtual biological swarm based on the target behavior state corresponding to each particle object and the vertex texture animation of the individual target biological model. This allows the swarm animation to display a target virtual biological swarm in multiple behavior states, improving the diversity and realism of the simulation results.

The invention provides a virtual fluid model generation method and device, electronic equipment and a storage medium, and the method comprises the steps: determining a target flow direction of a virtual fluid model relative to a game role in a virtual scene, creating an original primitive model, and determining a splicing surface and a to-be-mapped surface on the original primitive model based on the target flow direction, the uv coordinate directions of the to-be-mapped surfaces are the same, obtaining a texture map with a fluid flowing effect, and mapping the to-be-mapped surfaces by adopting the texture map based on the uv coordinates of the to-be-mapped surfaces to obtain target primitive models with the same fluid flowing directions of the to-be-mapped surfaces, the multiple target element models are spliced one by one in the target flow direction through the splicing faces, a virtual fluid model with the fluid flow direction being the target flow direction is obtained, and due to the fact that the fluid flowing directions of the target element models are the same, the target element models are adopted to be spliced according to the target flow direction to generate the virtual fluid model. And the correctness of the flowing direction when the virtual fluid model is placed at any angle can be ensured.

The application is suitable for the technical field of image processing, and particularly relates to a virtual character skeleton volumization simulation sampling method and device based on a hierarchical structure, equipment and a medium. The method obtains a near body end position and a far body end position of a skeleton segment to be volumized, determines a cross section parameter of a convex geometric shape cross section corresponding to a skeleton sampling point in any skeleton of the two positions, taking the skeleton sampling point as a center point and combining a preset right cylinder model, constructs an outermost layer coordinate expression of the skeleton segment according to the cross section parameter, determines a space included in the outermost layer coordinate expression as a volumization space of the skeleton segment, determines a surface sampling point in the outermost layer of the volumization space, and determines a coordinate of the surface sampling point as a volumization sampling result of the skeleton segment, so as to realize volumization construction of a three-dimensional virtual character, sample accurate character body surface data, and help subsequent collision detection and model penetration avoidance, thereby improving the accuracy of three-dimensional virtual character animation production.

A system for enhancing a three-dimensional volumetric model according to one embodiment of the present invention is a system for enhancing a three-dimensional volumetric model connected to a user terminal via a network, the system comprising: a model information unit that stores a three-dimensional volumetric model and three-dimensional volumetric model data generated by modeling object images captured by a plurality of cameras using a volumetric technique; a model reconstruction unit that selects optimal data from the three-dimensional volumetric model data corresponding to the three-dimensional volumetric model and reconstructs the three-dimensional volumetric model on the basis of the selected optimal data; a model conversion unit that converts the reconstructed three-dimensional volumetric model into a mesh format; and a model enhancement unit that processes the converted three-dimensional volumetric model using a diffusion model.

This application belongs to the field of 3D modeling, specifically involving a method, system, device, and storage medium for modeling I-shaped doors and windows. The method involves vertically cutting the wall model area; performing translation and thickness stretching operations on the upper and lower door frame areas to generate a three-dimensional horizontal frame, serving as the first door and window model; horizontally cutting the middle area to obtain the base area; applying wall texture to the base area to obtain the first wall model; cutting the middle panel area, performing translation and thickness stretching operations on it, and assigning texture to it to obtain the second door and window model; assigning texture to the door and window models to obtain the third door and window model; and combining all the models to form a composite door and window wall model. The CityEngine rule-based modeling method is used to build different I-shaped door and window frame graphics, which is both lightweight and convenient. It retains the traditional door and window construction method by leveraging rule syntax, reducing repetitive splicing operations and improving modeling efficiency.

The application discloses an image rendering method and device, a terminal, a storage medium and a program product, and belongs to the technical field of image rendering. The method comprises the following steps: receiving a target LOD value sent by a virtual environment rendering engine through a light tracing processing engine, wherein the target LOD value represents a detail level of an object model corresponding to a target scene object in a to-be-rendered image; performing light tracing calculation on the target scene object through the light tracing processing engine based on the target LOD value, so as to obtain target light tracing data corresponding to the target scene object; and sending the target light tracing data to the virtual environment rendering engine through the light tracing processing engine, so that the virtual environment rendering engine renders the target scene object based on the target light tracing data. The light tracing rendering effect can be provided when the virtual environment rendering engine does not have the light tracing rendering capability, and the image rendering capability of the virtual environment rendering engine can be optimized by upgrading and developing the light tracing processing engine without modifying the internal code of the virtual environment rendering engine.