41 results about "Vertex normal" patented technology

The embodiment of the invention discloses a three-dimensional model simplification method and device, computer equipment and a storage medium. The method comprises the steps of obtaining an original three-dimensional model, and performing voxelization processing on the original three-dimensional model to obtain a voxelized three-dimensional model; determining a first three-dimensional model composed of a plurality of vertexes according to the voxelized three-dimensional model; performing region division on the first three-dimensional model to obtain a plurality of local regions, and determining a feature vertex corresponding to each local region according to the vertex position and the vertex normal direction of each local region; forming a second three-dimensional model according to the feature vertexes and vertexes in the first three-dimensional model, and carrying out normal refinement processing on the normal of each triangular surface in the second three-dimensional model to obtain a target second three-dimensional model; and performing grid reconstruction processing on the target second three-dimensional model or performing vertex merging processing on vertexes in the target second three-dimensional model to generate a simplified target three-dimensional model. The original three-dimensional model can be simplified and details in the original three-dimensional model can be reserved.

The invention discloses a triangular mesh subdivision method based on vertex normal interpolation calculation. The method comprises the following steps: S1, coding and storing all points, lines and surfaces; s2, calculating protrusion indexes of all surfaces; s3, inputting a subdivision threshold degree a, and inputting subdivision intensity b; s4, determining all surfaces needing to be subdivided according to the subdivision threshold degree a; s5, subdivision calculation is carried out; s6, circulating all the to-be-subdivided surfaces, and performing subdivision calculation; s7, carrying out topological optimization again; and S8, carrying out coding storage on points, lines and surfaces of the graph after topological optimization. By calculating and optimizing the triangular patch model, the subdivision smoothing processing of the abrupt area of the model is realized, so that after the model is optimized, the surface of the model is smoother, a better display effect is kept, the operation performance of the model is greatly improved, and the effect display and fluency of live-action three-dimensional rendering and demonstration are ensured.

The invention relates to a three-dimensional grid model processing method, computer equipment and a storage medium. The three-dimensional grid model processing method comprises the steps of obtaining a three-dimensional grid model corresponding to a medical image; wherein the three-dimensional grid model is composed of a plurality of grids, and the outer surface of the three-dimensional grid model is defined by geometric patches of the grids; acquiring the vertex curvature of each vertex in the grid, and adjusting the side length of the geometric patch of the grid according to the vertex curvature; wherein the larger the curvature of the vertex of the grid is, the larger the probability that the side length of the grid is shortened is, and / or the smaller the curvature of the vertex of the grid is, the larger the probability that the grid is merged is; and the vertex of the grid is translated by a preset distance along the direction pointed by the vertex normal vector, so that the self-crossing phenomenon after the expansion of the three-dimensional grid model is improved.

A decoder subdivides, for a 3-dimensional (3D) mesh, a bash mesh obtained from a bitstream to generate a first subdivided mesh. To subdivide an edge, formed by a first and a second vertex from the first subdivided mesh, the decoder determines a pair of vertices, from the first subdivided mesh, used to generate the first vertex. And, the decoder determines a refinement vector based on combining vertex normals of the pair of vertices. The edge is subdivided to determine a vertex based on the refinement vector and a point along the edge. The 3D mesh is reconstructed by the decoder based on a second subdivided mesh including vertices of the first subdivided mesh and the vertex.

The invention discloses a three-dimensional model dynamic rendering method and a storage medium, and the method comprises the steps: obtaining three-dimensional data of a target scene, obtaining a plurality of voxels, and enabling each voxel to correspond to a plurality of voxel attributes and an initial comprehensive displacement vector; in any voxel in any time step, obtaining a comprehensive displacement vector of the voxel in the current time step according to a preset physical deformation rule and / or animation curve deformation rule, and performing coordinate transformation on the voxel; after the coordinate transformation, updating the voxel attribute of the voxel corresponding to the current time step length; and performing real-time three-dimensional rendering on the target scene according to the vertex normal of each voxel at the current time step length and the voxel attribute. The physical consistency is ensured in the dynamic deformation process by synthesizing the displacement vector; by updating the voxel attributes, the voxel attributes are kept in smooth transition after deformation; and high-quality real-time rendering of the target scene is realized by recalculating the deformed vertex normal and combining the illumination model.

The invention discloses a model rendering method and device, computer equipment and a storage medium, and belongs to the technical field of computers. The method comprises the steps of obtaining a three-dimensional grid model in response to a rendering instruction for the three-dimensional grid model; a component of a vector pointing to the vertex from a target position point in the horizontal direction is determined as a two-dimensional vector of the vertex, and the target position point is located on the center line of the three-dimensional grid model; determining a height offset parameter of the vertex based on the height value of the vertex in the vertical direction; the two-dimensional vectors of the vertexes and the height offset parameters are combined, vertex normal lines of the vertexes are obtained, and the vertex normal lines of the vertexes are used for reflecting the surface orientation of the three-dimensional mesh model; and rendering the three-dimensional mesh model based on the vertex normal of the plurality of vertexes. In the rendering process, the process of calculating the vertex normal in real time replaces the process of pre-baking the wrapping normal by using a specially designed plug-in tool, so that the operation is simple and convenient, and the overall efficiency of rendering the three-dimensional grid model is improved.

The embodiment of the invention provides a vertex adjustment method and device, electronic equipment and a readable storage medium, and relates to the field of data processing, and the method comprises the steps: determining the normal vector of a to-be-processed model space, converting the normal vector into a view space normal, determining the UV coordinates of the vertexes of a grid in the to-be-processed model space and the vertex normal, and determining the UV coordinates of the vertexes of the grid in the to-be-processed model space; generating time-based noise, UV-based noise and normal-based noise on the basis of the current time parameter, the vertex UV coordinate and the vertex normal, determining vertex offset of the to-be-processed model space on the basis of the view space normal, the time-based noise, the UV-based noise and the normal-based noise, and adjusting the vertex position of the to-be-processed model space on the basis of the vertex offset. Therefore, the vertex of the to-be-processed model space is adjusted, dynamic performance of the shield is achieved, and the limitation that a traditional static model cannot present the dynamic effect is overcome.

The invention belongs to the technical field of three-dimensional modeling, and particularly relates to a novel multi-detail-level terrain rendering method, which comprises the following steps: S1, inputting terrain data; s2, calculating a vertex, a normal and a texture coordinate array, and transmitting into a rendering pipeline; s3, calculating an LOD maximum value, a resolution ratio scale factor and a sight distance switching factor; s4, setting basic attributes of root nodes of the quadtree, and completing construction of terrain geometry; s5, rendering terrain geometry in real time; the method has the advantages that by setting basic attributes of root nodes of the quadtree, a topographic data structure with the quadtree as an organization form is constructed; a topographic organization mode of'single-source geometric data + multi-level index rules' is established, and a mode of'repeatedly storing complete geometric data in each level of LOD 'in a traditional tile pyramid is converted into a mode of only storing a vertex, a normal and a texture coordinate array; the memory pressure in a high-precision terrain scene can be reduced, and the terrain real-time rendering efficiency can be improved.

The invention discloses a three-dimensional construction method and device of a cold source pipe network, equipment, a medium and a product, and the method comprises the steps: carrying out the transformation processing of a constructed standardized component with a low surface number according to a predefined pipe diameter parameter and a coordinate transformation algorithm, and generating a three-dimensional pipeline model with any space trend and any pipe diameter; calculating all vertex normal lines of the three-dimensional pipeline model; and according to the vertex normal and a preset Blinn-Phong illumination model, performing layered rendering processing of ambient light, diffuse reflection and highlight reflection on the three-dimensional pipeline model to obtain a rendered three-dimensional pipeline model. By adopting the method, rendering optimization of the low-surface-number pipeline model can be realized, and the expression accuracy of the pipeline appearance is improved, so that the three-dimensional visualization and dynamic monitoring capability of the cold source pipe network is improved.

The invention relates to a water body rendering method and device, equipment, a storage medium and a program product, and the method comprises the steps: superposing periodically continuous waveform data and noise data to all vertexes of a horizontal grid, and obtaining a wave pattern; coloring the wave white mold to obtain a wave model; respectively carrying out derivation processing on the waveform data and the noise data at each vertex in the wave pattern to obtain a first space gradient corresponding to the waveform data and a second space gradient corresponding to the noise data; performing composite processing on the first space gradient and the second space gradient to obtain a composite gradient of each vertex; obtaining a vertex normal vector of each vertex based on the composite gradient of each vertex; based on the vertex normal vector and the line-of-sight direction vector of each vertex, generating edge intensity data of the wave contour; and superposing the edge strength data to the wave model to obtain a water body rendering result. According to the scheme, the vertex normal vector is dynamically determined based on the composite gradient, so that the rendered water body has a dynamic surge effect.

The invention discloses an object stroking method and device, electronic equipment and a computer readable storage medium, and the method comprises the steps: carrying out the basic material rendering processing of an object model of a target object, and obtaining a first rendering model; based on the shooting direction of the virtual camera, removing vertexes which do not face the virtual camera in the object model to obtain a model after removal; based on the vertex offset information, controlling each vertex of the model after elimination to offset along a vertex normal in the world space to obtain an offset coordinate; based on a preset stroking special effect texture map and the offset coordinates of the vertexes of the model after elimination, the model after elimination is rendered, a second rendering model is obtained, an edge area in the second rendering model presents a stroking effect, and a non-edge area has transparency; and fusing the first rendering model and the second rendering model to obtain a fused model with an object stroking effect, so that the presentation effect of the object stroking special effect of the virtual object can be improved.

The invention discloses a three-dimensional model rendering method, device and equipment and a computer readable storage medium. The method comprises the steps that a first model file of a to-be-rendered object is acquired, the first model file comprises triangular patch information of the to-be-rendered object, the to-be-rendered object comprises at least one of an object included in a medical image, a prosthesis used for being implanted into a body and a medical device, and the triangular patch information comprises vertex normal information; based on the vertex normal information, generating a texture map corresponding to the first model file; obtaining material parameter information corresponding to the material type of the to-be-rendered object; establishing an association relationship among the material chartlet, the material parameter information and the first model file; and rendering the first model file based on the incidence relation, the material chartlet and the material parameter information to obtain a rendered three-dimensional model. According to the rendering method of the three-dimensional model, the rendering effect of the three-dimensional model in the medical field can be ensured.

The present invention is an error compensation method based on binder jetting additive manufacturing. The method includes the following steps: obtaining an offset error formula for triangular facets by considering the interaction between staircase error and penetration error, determining the number m of triangular facets in the input STL model, defining the set M as an array of triangular facets Tj, where m is the number of elements in the set M, and obtaining the offset errors of all triangular facets in the STL model; calculating the offset compensation value of the STL model vertices according to the projection of the offset error of the triangular facets in the vertex normal vector direction. After traversing all vertices, the vertices vi of the STL model are offset inward along the opposite direction of the vertex normal vector according to the corresponding offset compensation values, and the offset vertices are obtained, and then the compensated STL model is obtained. The present invention reduces the dimensional error caused by the interaction between staircase error and penetration error and realizes high-precision additive manufacturing.

The present disclosure relates to an information processing device and a method configured so that it is possible to suppress an increase in the data length of a vertex normal vector. The method includes deriving a maximum scalar value of a face normal vector of an adjacent face around a target vertex of a subdivided base mesh, using the maximum scalar value to scale the face normal vector of the adjacent face, using the scaled face normal vector to derive the vertex normal vector of the target vertex, and deriving a local-coordinate displacement vector based on the vertex normal vector. The present disclosure can, for example, be applied to information processing devices, electronic equipment, information processing methods, or programs, etc.

An embodiment of the present invention provides a light and shadow rendering method, apparatus, device, and storage medium. The method includes: obtaining a first face model to be rendered for light and shadow effects in a real-time animation scene in a game; adjusting the vertex normals in the first face model; generating a normal map based on the adjusted first face model; rendering light and shadow effects based on the normal map and a second face model to obtain the light and shadow effects of the second face model in the real-time animation scene in the game, wherein the second face model is obtained by adjusting the vertex normals of the face model in the cutscene. In the real-time animation scene in the game, the vertex normals in the first face model are adjusted, and then the normal information corresponding to the adjusted first face model is baked into the second face model to obtain a normal map. Finally, rendering processing is performed based on the normal map and the second face model to obtain the expected light and shadow effects, thereby improving the texture of the animation picture.

The present invention relates to an intelligent recognition method and device for body objects, the method comprising: loading a standard exchange format file, including a plurality of basic body objects and non-basic body objects; processing the non-basic body objects in sequence, determining the triangles stretched by each vertex according to the vertex index information set of each triangle, generating the face normal of the triangle according to the vertex normal vector of each vertex of the stretched triangle, analyzing the face normal of each triangle and determining the non-intersecting, coplanar, parallel or intersecting relationship of the different faces of the triangle, comparing the standard judgment set of the face normal of all triangles of the standard geometric form with the face normal set of all triangles of the non-basic body object, so as to preliminarily determine the macroscopic geometric form of the non-basic body object, and then determine the face normal and relationship of each macroscopic surface, and extract the description parameters of the non-basic body object according to these face normals and relationships. The present invention significantly improves the recognition speed of geometric bodies.

The invention discloses a pipeline parameterization rendering method applied to a lightweight display platform, and relates to the technical field of pipeline parameterization rendering, and the method comprises the steps: obtaining pipeline parameter data, carrying out the contour boundary point selection through uniform angle sampling, obtaining an initial contour boundary point, carrying out the optimization adjustment through a step length adjustment algorithm, and obtaining the pipeline parameter data; constructing vertex coordinates according to the optimized and adjusted contour boundary points; constructing a vertex normal vector through pipeline parameter data, constructing vertex texture coordinates by using a texture mapping method and combining vertex coordinates, and constructing a triangular mesh by using a Deloye triangulation algorithm; and compressing the triangular mesh by using the topologically guided micro-mesh to obtain compressed data, and rendering the compressed data through visible buffer sputtering to generate rendered data. According to the method, the data volume can be greatly reduced, the rendering efficiency is improved, and the platform resource consumption is reduced, so that the method is more suitable for application requirements of lightweight graphic platforms.

The application provides a laser effect rendering method, device and equipment and a storage medium, which are characterized in that the method determines the vertex normal in the line-of-sight space based on the vertex normal of the light model, samples the laser map with the vertex normal in the line-of-sight space, obtains a first texture map, and then renders the model with the sampled first texture map and a second texture map in the light model, so as to simulate the laser material through the light model. In this way, the sampling and calculation amount is greatly reduced, the performance overhead is reduced, the frame rate of game running is improved, the rendering efficiency is improved, and a basis is provided for the development of a mobile game.

The present application relates to a method, system, electronic device and storage medium for rendering optimization of stroke effects, wherein the method for rendering optimization of the stroke effects includes: traversing all vertices of the model, grouping the normals of vertices at the same position, and summing and normalizing the normals of vertices in the same group to obtain smooth normals; converting the data range space of the smooth normals to obtain smooth normals in the model space; then traversing the vertices, constructing a conversion matrix, converting the smooth normals from the model space to the tangent space, and saving them; taking the smooth normals from uv4, and converting the space of the data range; converting the smooth normals from the tangent space to the camera space through the constructed conversion matrix, and converting the vertices from the model space to the camera space; finally converting the smooth normals and vertices to the NDC space, and drawing the stroke color. The problem of stroke breakage that occurs when high-frequency normal strokes are used is solved, and excellent stroke effects can be rendered in real time while ensuring performance on mobile platforms.

The invention provides a stylized stroke rendering method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring vertex information of a model; reconstructing a camera vector of the world space based on the vertex information; generating a first layer of texture coordinates based on a first dot product result of the reconstructed camera vector and a world space vertex normal; generating a second layer of texture coordinates based on a second dot product result of the world space vertex normal and the light direction; according to the first-layer texture coordinates and the second-layer texture coordinates, corresponding brush chartlets are sampled, and first-layer stroking information and second-layer stroking information are obtained; and carrying out fusion processing on the first layer of stroking information and the second layer of stroking information to generate a stroking rendering effect of the model. Through the method provided by the invention, the thickness and depth dynamic change of the model stroking is realized, and the artistic expressive force of the model is enhanced.

According to one aspect of the disclosure, a video processing method is provided. The method may include inputting attribute data associated with an image region and a sparse depth map to a sparse depth completion network. The method may include generating a refined dense depth map based on the attribute data and the sparse depth map using the sparse depth completion network. The method may include performing a three-dimensional (3D) reconstruction process based on the refined dense depth map to generate a point cloud of the image region. The method may include performing a triangular meshing process to generate a mesh model based on the point cloud of the image region. The method may include performing a texture mapping process based on the mesh model and the attribute data to generate a textured mesh of the image region. The method may include performing a vertex normal vector calculation process based on the textured mesh to generate a three-dimensional representation of the image region.

A decoder obtains, from a bitstream, a base mesh for a 3D mesh. The decoder subdivides an edge, formed by a first and a second vertex from a first mesh associated with the base mesh, to determine a vertex. Subdividing the edge includes: determining a directional alignment between a first vertex normal of the first vertex and a second vertex normal of the second vertex, and determining the vertex based on a point along the edge and a refinement vector that is based on the directional alignment, the first vertex normal, and the second vertex normal. The decoder decodes the 3D mesh based on a second mesh comprising vertices of the first mesh and the vertex.

The invention belongs to the technical field of 3D rendering, and discloses an environment reflection correction method and system based on 3D graphic rendering, and the method comprises the steps: obtaining the world coordinates of a target vertex and a camera through a vertex shader, carrying out the normalization processing, obtaining a sight line direction vector, judging the sight line orientation through calculating the dot product of the vector and a vertex normal vector, and carrying out the correction of the target vertex. And the reflection direction is determined in a targeted manner and transmitted to the pixel shader, so that wrong sampling of the back environment is avoided from the source. The vertex reflection direction vector is interpolated based on the same primitive, the reflection direction of each pixel point can be accurately obtained, it is ensured that the reflection effect fits the actual surface characteristics of the model, and correction is completed by sampling an environment reflection value and combining illumination calculation. According to the method, the real reduction degree and immersion of the 3D scene are greatly improved, the reliability and stability of the rendering effect are enhanced, and better visual experience is brought to a user.

The present disclosure relates to a method, apparatus, electronic device, and storage medium for rendering a three-dimensional model. The method includes: calculating the diffuse light color information of an object according to a first relationship between the vertex normal in the three-dimensional model and the light source direction in the lighting model; calculating the scattered light color information of the object according to a second relationship between the vertex normal and a preset viewing line-of-sight direction in the lighting model; calculating the specular reflection light color information of the object according to a third relationship between the normalization result and the vertex normal; and rendering the three-dimensional model of the object based on the above three kinds of light color information. In this solution, the above three relationships are respectively used to calculate the diffuse light color information, the scattered light color information, and the specular reflection light color information. The calculation results have a relatively consistent and saturated light sense in different directions, which can make the light effect levels of objects with subsurface scattering more abundant and avoid being too dark or too bright at certain angles.

The invention discloses a model processing method, a model processing device, a computer readable storage medium and electronic equipment, and the method comprises the steps: carrying out voxelization processing on a to-be-processed grid model, generating a voxel model capable of wrapping the to-be-processed grid model, and carrying out the voxelization processing on the to-be-processed grid model according to the voxel model, and generating a reference grid model matched with the surface contour of the to-be-processed grid model, selecting a reference vertex corresponding to each first vertex in the to-be-processed grid model from a plurality of second vertexes included in the reference grid model, and determining the normal of the reference vertex as the normal of the corresponding first vertex. Thus, the manual participation link in the model vertex normal adjustment process can be reduced, the dependence of model vertex normal adjustment on the technical level of art personnel is reduced, and the situation that the model manufacturing efficiency is affected due to the fact that the art personnel manually adjust the vertex normal is long in time consumption and low in efficiency is avoided; and the adjustment efficiency of the vertex normal of the model and the manufacturing efficiency of the three-dimensional model can be guaranteed.

The invention discloses a large-scale scene area reduction optimization method, device and equipment based on a clustering algorithm, and the method comprises the steps: calculating a vertex normal vector, and constructing a triangular patch topological relation; carrying out multi-condition plane region judgment, and carrying out merging and topological optimization processing on the plane regions meeting the conditions; multi-mode detection is carried out, contour points of the triangular patch model are judged, K-Means clustering is carried out on non-contour points, and a point set is formed; and performing triangulation on the point set, and reconstructing to generate a new triangular patch model. Through calculation optimization of the triangular patch model, smoothing processing of the abrupt area of the model is realized, so that after the model is optimized, abnormal point surface protrusions of the model are reduced, patch redundancy is reduced, a better display effect is kept, the operation performance of the model is greatly improved, and effect display and fluency of live-action three-dimensional rendering and demonstration are ensured.

The invention relates to an intelligent identification method and device for body objects, and the method comprises the steps: loading a standard exchange format file which comprises a plurality of basic body objects and non-basic body objects; the non-basic body objects are processed in sequence, triangles tensioned by the vertexes are determined according to the vertex index information set of the triangles, and the plane normal directions of the triangles are generated according to the vertex normal vectors of the vertexes of the tensioned triangles; analyzing the surface normal direction of each triangle, determining the non-intersecting, coplanar, parallel or intersecting relation of different surfaces of the triangles, and comparing a standard judgment set of the surface normal directions of all triangles of the standard geometric shape with a surface normal direction set of all triangles of the non-basic body object so as to preliminarily determine the macroscopic geometric shape of the non-basic body object; and further determining the surface normal direction and the relationship of each macroscopic surface, and extracting the description parameters of the non-basic body object according to the surface normal direction and the relationship. According to the method, the geometric body identification speed is obviously improved.

The invention discloses a method for detail level setting and selection of a three-dimensional model. The method comprises the following steps: dividing the three-dimensional model into a plurality of model parts; setting a different level of detail for each of the plurality of model portions, wherein the level of detail of the model portion sensitive to the vertex normal is fixed as the highest level; and for each model part except the model part with the fixed detail level in the plurality of model parts, setting the number of pixels corresponding to each detail level of the model part, and the higher the detail level is, the larger the number of pixels is. The invention also relates to a system, a device and a medium for detail level setting of a three-dimensional model.

The invention provides a rendering method and device for a visual interaction effect and electronic equipment, and the method comprises the steps: responding to an interaction behavior between an interaction model in a virtual scene and a target model, and controlling a particle emitter mounted on the interaction model to emit a preset normal map; the normal chartlet comprises normal information representing an interaction effect; rendering the normal map to a preset texture to obtain a target texture, and mixing a normal of the target texture with a vertex normal of the target model to obtain a target vertex normal of the target model; and rendering on the surface of the target model based on the target vertex normal to generate an image representing an interaction effect. In the mode, the normal map is emitted through the particle emitter, the normal map is rendered into the preset texture, and the preset texture is sampled to be mixed with the vertex normal of the target model, so that the water ripple effect can be rendered based on the mixed vertex normal, the implementation process is simple, the performance consumption is low, and a vivid visual effect can be realized; and thus, the compatibility is improved.

The application discloses a pipeline parameterized rendering method applied to a light-weight display platform, relates to the technical field of pipeline parameterized rendering, and comprises the following steps: acquiring pipeline parameter data, performing contour boundary point selection by utilizing uniform angle sampling, obtaining initial contour boundary points, and optimizing and adjusting the initial contour boundary points by a step adjustment algorithm; and constructing vertex coordinates according to the optimized and adjusted contour boundary points; constructing vertex normal vectors by the pipeline parameter data, constructing vertex texture coordinates by utilizing a texture mapping method in combination with the vertex coordinates, and constructing a triangular mesh by utilizing a Delaunay triangulation algorithm; compressing the triangular mesh by utilizing a topological guide micro-mesh, obtaining compressed data, and rendering the compressed data by a visibility buffer sputtering to generate rendering data. The application can greatly reduce the data amount, improve the rendering efficiency, reduce platform resource consumption, and is more suitable for the application requirements of a light-weight graphics platform.