192 results about "Screen space" patented technology

This application relates to a shadow rendering method performed by a computer device. The method includes: obtaining a world space location of a pixel point of a screen space in a world space in which a virtual scene is located; determining, from a plurality of light sources in the virtual scene, a target light source whose illumination area comprises the world space location of the pixel point; obtaining a world space location of the target light source in the world space; performing ray tracing based on the world space location of the target light source and the world space location of the pixel point, to obtain light source access information of the target light source for the pixel point; and performing shadow rendering on the virtual scene based on the light source access information.

The invention discloses an SPH fluid rendering method and system based on a Gaussian function, and belongs to the technical field of computer graphics, and the method comprises the steps: receiving SPH simulated fluid particle data, and constructing a particle connection graph based on a particle neighborhood relation; based on the particle connection graph, extracting local geometric features of each particle through a neural network and aggregating the local geometric features into global geometric features; analyzing the global geometric features into Gaussian function parameters to generate a plurality of Gaussian functions for each particle, and superposing all Gaussian functions in space to form an implicit fluid surface; performing screen space rendering on the implicit fluid surface to obtain a final fluid rendering image; and after foam particles generated by SPH simulation are also mapped into a Gaussian function, a fluid rendering image containing a foam visual effect is obtained through screen space rendering. The method can improve the smoothness and reality of the rendering result while guaranteeing the calculation efficiency, and achieves the consideration of the efficiency and quality of fluid rendering.

The invention discloses a webpage layout method and device, electronic equipment and a storage medium, in response to a webpage layout adjustment instruction, display characteristic parameters of a target viewport are obtained based on a preset interface, and the display characteristic parameters comprise viewport size parameters and an equipment pixel ratio; according to the viewport size parameter, classifying the display equipment corresponding to the target viewport to the corresponding screen specification classification; when the device pixel ratio deviates from the reference value, calculating the compensation scaling of each interface element in the target viewport in the display device based on the screen specification classification and the display characteristic parameters; and performing layout optimization rendering processing on each interface element according to the compensation scaling. Compared with the prior art, the display equipment is classified into the screen specification classification through the viewport size parameters, and the rigid limitation of a traditional fixed breakpoint is broken through. By classifying the target viewports, the problem that the main content area is blank due to fixed width elements in an ultra-wide screen scene is solved, and the screen space utilization rate is increased.

The invention provides a game rendering method and system capable of eliminating volume cloud and mist in real time and electronic equipment, and belongs to the technical field of game development. The method comprises the steps that a cloud and mist area is set, the set cloud and mist area is divided into a plurality of equal-size grids, and each grid stores an elimination state and an elimination progress value; dynamically updating vertex concentration textures; calculating and storing cloud and mist concentration values of vertexes around each grid based on the grid elimination progress; view cone optimization rendering: determining a visible cloud range, combining adjacent grids to be rendered into a rectangular region in a two-dimensional plane, expanding the rectangular region into a cube, and projecting the cube to a screen space to calculate a bounding box; and shader sampling: for pixels in the screen bounding box, calculating cloud transparency and color through ray stepping sampling. According to the method, through grid dynamic management, rendering range optimization and shader efficient sampling, low-consumption and real-time elimination high-quality volume cloud and mist rendering can be realized at a mobile terminal, and performance and game interaction experience are considered.

Methods, systems and apparatuses may provide for technology that determines a major axis length of an ellipse in texture space based on a transformation matrix associated with a circle in screen space, inverts the major axis length, determines a product between the inverted major axis length and a determinant of the transformation matrix, and determines a minor axis length based on a modulus of the product between the inverted major axis length and the determinant of the transformation matrix. In one example, the technology selects a level of detail in the texture space based on the major axis length, the minor axis length, a direction of the major axis length, and a direction of the minor axis length.

The invention relates to a hierarchical occlusion perception grid infinitesimal streaming transmission and adaptive rendering method, which comprises the following steps of: S1, decomposing a model into grid infinitesimal, recursively constructing a bounding volume hierarchical tree BVH from bottom to top by taking the grid infinitesimal as a leaf node, and setting a semantic error and a geometric error for each sub-node cluster; s2, acquiring camera parameters of a current frame, comparing a total screen space error with an error threshold value, if the error is smaller than the threshold value, stopping traversing, and adding the cluster node into a to-be-rendered list of the current frame; and S3, if the grid infinitesimal corresponding to the cluster node in the to-be-rendered list is not loaded to the GPU memory, sending a loading request to an asynchronous streaming manager, asynchronously loading the corresponding grid infinitesimal from the memory, and rendering a father node of the cluster node. Compared with the prior art, the method has the advantages that large-scale and high-precision model data can be rendered on the lightweight XR all-in-one machine in real time, and the like.

The invention discloses a multi-factor exponential decay three-dimensional model precision control and loading method and system, and is used for loading a three-dimensional model based on a tile data service, and the multi-factor exponential decay three-dimensional model precision control and loading method comprises the steps: based on the tile data service, according to a current viewpoint, obtaining a root node as a current tile node; traversing child nodes of the current tile node, and screening visible child node tiles of the current scene; determining a screen space error corresponding to each visible sub-node tile based on the current viewpoint height, the distance between the current viewpoint and each visible sub-node tile and the inclination angle; and loading the tiles based on the screen space errors corresponding to the visible child node tiles. According to the method, the visualization effect is ensured, and the data loading efficiency and rendering performance are improved.

The invention provides a 3D GS anti-aliasing rendering method fused with adaptive expansion, which comprises the following steps: under a 3D GS framework, before projecting a 3D Gaussian to a screen space, firstly applying a 3D Gaussian low-pass filter to the 3D Gaussian to suppress high-frequency components exceeding a Nyquist frequency and reduce the probability of occurrence of aliasing artifacts; after a three-dimensional Gaussian is projected to a screen space, a resolution self-adaptive expansion coefficient adjusting mechanism is used, and the physical size of a Gaussian point can be automatically adjusted according to the image resolution. And finally, in combination with a super-sampling technology, it is ensured that the colors of the Gaussian primitives can reasonably influence the pixels. According to the multi-guarantee 3DGS anti-aliasing rendering method, the aliasing problem caused by overlarge coverage of Gaussian points is prevented under the low resolution, and detail loss and edge erosion are avoided under the high resolution.

The invention discloses a port avionics hub digital twin multi-level simulation model construction and visualization method, which comprises the following steps: obtaining a multi-view RGB image of a target port area, obtaining a camera attitude of each view by using an SfM algorithm, and reconstructing a sparse three-dimensional point cloud; constructing an LOD2 shell model with a semantic mark; an LLO3 model with holes is constructed; the LOD0-LOD3 model is serialized into a glTF 2.0 binary format and transmitted to a client side through HTTP / 2, the client side calls WebGL 2.0 through a browser to complete decompression, uploading and PBR rendering, and interactive plug-in-free visualization is achieved; constructing an eight-fork-two-fork-four-fork mixed spatial index, and performing multi-stage division and persistence on the LOD < 0 >-LOD < 3 > tiles, so that a client locates visible tiles within constant time based on node numbers; visual cone cutting and screen space error judgment are adopted to execute progressive loading on visible tiles, LOD0 is loaded at first, then LOD1-LOD3 is subjected to incremental superposition, low-level tiles in the same area are replaced with the LOD3 in a cross fading mode at the ultra-close distance (the Euclidean distance d from the center of a camera to the center of a target tile is smaller than or equal to 100 m), and smooth visual experience is obtained in a browser.

The invention discloses an ocean terrain digital display method based on three-dimensional modeling. The ocean terrain digital display method comprises the following steps of 1, constructing a multi-source ocean data set; 2, performing space fusion by adopting a self-adaptive interpolation method based on position weight to generate a three-dimensional space density field; 3, performing contour surface extraction by adopting an improved Marching Cubes algorithm to generate an initial three-dimensional terrain model; 4, performing local modeling by adopting a Delaunay triangulation network reconstruction method, and constructing a complete three-dimensional terrain model; 5, obtaining a texture terrain model; step 6, constructing an LOD tree structure and realizing dynamic loading in combination with view cone cutting and a screen space error control strategy; and step 7, based on a dynamic loading result of the LOD tree structure, driving node switching through a time controller, and performing visual display. According to the method, three-dimensional modeling and an LOD tree structure are fused, and high-precision reconstruction and evolution display of the ocean topography are achieved.

The invention discloses a 3D Gaussian splash rendering optimization method based on a Unity engine in VR, and relates to the technical field of computer graphics. PLY point cloud files are converted into SOG high-compression formats containing multi-level LOD information, after low-transparency Gaussian points are removed, Morton coding sorting is carried out on the center coordinates of the Gaussian points, and then the 3D Gaussian splash rendering optimization method based on the Unity engine in VR is realized. The method comprises the following steps: constructing an octree spatial index containing a spatial bounding box and multiple LOD data, removing Gaussian points in a grading manner according to a camera distance, selecting an LOD hierarchy, carrying out deep barrel sorting on visible Gaussian points, executing drawing by taking a barrel as a unit, and combining near-to-far sorting, an improved mixed equation and screen space edge removal and amplification operation to obtain a target image. According to the method, through multi-dimensional optimization such as loading, space elimination and rendering, the loading efficiency of the VR equipment is improved, the rendering burden is reduced, Tile-Based hardware is adapted, and smooth operation of 3D Gaussian splashing on the VR all-in-one machine is realized.

A technique for rendering is provided. The technique includes distributing primitives to a set of screen space processors based on a first assignment configuration; modifying assignment configuration to replace the first assignment configuration with a second assignment configuration; and distributing primitives to the set of screen space processors based on the second assignment configuration.

The invention provides a user-defined background model rendering method and device, equipment and a storage medium. The method comprises the steps of determining background visual elements of a target scene according to a target picture; wherein the background visual element comprises at least part of the image of the target picture; binding a texture coordinate system of the target picture with a screen space coordinate system so as to enable the background visual elements to keep a fixed perspective relationship in the operation interface; obtaining a target model; in response to transformation operation for the camera and / or the target model, determining camera parameters and spatial pose parameters of the target model; obtaining a target scene according to the spatial pose parameter, the camera parameter and the background visual element of the target model; and generating a rendering graph of the target scene. According to the scheme disclosed by the invention, the background image can be kept locked when the model or the camera is adjusted, so that the target scene matched with the perspective effect can be quickly and conveniently obtained.

The invention provides a three-dimensional geologic body rendering method and system which are used in the field of geospatial information visualization, and the method comprises the steps: obtaining a three-dimensional geologic body model; simplifying the three-dimensional geologic body model by a half folding algorithm based on secondary error measurement; blocking the simplified geologic body model through a planar quadtree, and constructing a spatial index tree according to the blocks to generate a geologic body blocking model of an LOD level; obtaining a viewpoint position and a vision field range of a user, calculating a screen space error, switching a geologic body partitioning model corresponding to an LOD level, and preferentially loading a high-precision close-range tile; the calculation shader based on the WebGPU performs parallel rendering on the geologic body block model tiles; and after the tiles of the geologic body block model are compressed through a Draco compression algorithm, the geologic body block model data stream is sent to the client. According to the scheme, the processing efficiency of the geologic body model in the links of loading, rendering, transmission and the like is improved, and the rendering efficiency of the geologic body model under mass requirements can be effectively guaranteed.

The invention discloses an illumination scene rendering method and device, a computer readable storage medium and a computer program product, and the method comprises the steps: setting a plurality of illumination probes in a three-dimensional Gaussian splashing scene, and determining a first spherical harmonic coefficient of each illumination probe based on the light field data of the three-dimensional Gaussian splashing scene, the illumination probe is used for collecting omnidirectional illumination information of a spatial point of a three-dimensional Gaussian splashing scene; for each unshielded pixel of the to-be-rendered object, determining indirect diffuse reflection light for the to-be-rendered object based on a target spherical harmonic coefficient of a target illumination probe determined by the unshielded pixel, the to-be-rendered object being an object placed in the three-dimensional Gaussian splash scene; for each unshielded pixel, based on the normal direction of the unshielded pixel and the constructed hierarchical Z buffer, indirect specular reflection light for the to-be-rendered object is determined through screen space reflection and a reflection ball; and fusing the indirect diffuse reflection light, the indirect specular reflection light and the direct light to generate an illumination rendering result for the to-be-rendered object.

This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for a dicing oracle for texture space shading. A processor obtains an indication of a UV parameterization for each of a set of geometry units and a target number of pixels per region of the UV parameterization, where the UV parameterization includes a first set of UV coordinates for an object space. The processor renders the set of geometry units in order to obtain a second set of UV coordinates for a screen space and a set of derivatives for the second set of UV coordinates. The processor calculates a resolution for a mip region map based on the set of derivatives and the target number of pixels per region. The processor outputs an indication of the calculated resolution.

The embodiment of the invention discloses an image rendering display method and device, equipment, a medium and a product, and relates to the technical field of computer image processing. The method comprises the following steps: rendering a scene where a three-dimensional model object is located to obtain a scene basic graph; determining a screen space coordinate of a preset virtual light source and a first distance between the preset virtual light source and the three-dimensional model object, and constructing a first light shade based on the screen space coordinate and the first distance; obtaining a first outer stroke effect picture of the three-dimensional model object, and obtaining a second outer stroke effect picture of an outer stroke located in the first light shade illuminated by a preset virtual light source based on the first outer stroke effect picture and the first light shade; the post-processing effect picture is obtained based on the scene basic picture and the second outer stroking effect picture, and the post-processing effect picture is displayed, so that the picture coordination degree and the style flexibility are improved, the problem of visual separation of light and stroking is solved, and the quality, controllability and efficiency of the post-processing effect are improved.

The invention discloses a real-time relighting method based on 2D Gaussian splashing and screen space light stepping, and the method comprises the following steps: collecting a multi-view image of an object model and a scene, and carrying out the initial reconstruction of the multi-view image through a motion recovery structure algorithm, so as to obtain an initial 2D Gaussian point cloud; obtaining a 2D Gaussian point cloud with complete geometric and material attributes; the method comprises the following steps: generating a geometric buffer area comprising depth, normal and material attributes based on a 2D Gaussian point cloud with complete geometric and material attributes, calculating a direct illumination result based on the geometric buffer area and an environment illumination map, calculating an indirect illumination result by adopting a screen space light stepping algorithm, and calculating a real-time illumination result. And synthesizing the direct illumination result and the indirect illumination result to output a real-time relighting result. According to the method, the technical problem that the existing relighting technology based on ray tracing cannot be real-time can be solved, and the rendering quality and the reality sense of relighting are improved through the global illumination of the screen space and the optimized illumination sampling strategy on the premise of ensuring the real-time performance.

The invention discloses a texture mapping transformation method and device and a rendering method and device, and the method comprises the steps: determining a fragment coordinate corresponding to a to-be-processed pixel point based on a screen space coordinate corresponding to the to-be-processed pixel point; determining a directed distance field according to the image information corresponding to the to-be-processed pixel point; determining a signed distance value corresponding to each to-be-processed pixel point based on the directed distance field and the fragment coordinate corresponding to each to-be-processed pixel point; determining a texture mapping area according to the signed distance value corresponding to each pixel point to be processed; and texture mapping is carried out on the fragment coordinates of the corresponding pixel points in the texture mapping area to obtain texture coordinates, so that the texture mapping method suitable for various texture mapping transformation requirements is constructed, the texture mapping transformation method is executed through a shader program, the shader program can be directly called during rendering, and the rendering efficiency is improved. On the premise of not increasing the hardware cost, the dynamic rendering efficiency and effect are improved.

Illumination rendering techniques for virtual environments are described herein. The techniques may include obtaining light data of a plurality of illumination probes in a scene; determining, based on the light data, a first ray, a second ray, and first indirect illumination data in a plurality of rays, the first ray being a ray that hits a pixel in a current screen space in the scene, the second ray being a ray that does not hit a pixel in the current screen space, and the first indirect illumination data being indirect illumination data of the hit pixel; obtaining an element hit by the second ray outside the current screen space, and obtaining second indirect illumination data from an illumination buffer library of the element, the second indirect illumination data being indirect illumination data of the element; and performing illumination rendering on the scene based on the first indirect illumination data and the second indirect illumination data. The method improves accuracy of illumination rendering.

The invention pertains to a computer-implemented method for visualizing 3D data of a multitude of data sets (1-5) in a scene using a computing device having limited available memory for visualizing the 3D data, the method comprising receiving the multitude of data sets, each data set having an LOD structure given as a tree comprising a multitude of nodes, determining the amount of memory available, selecting nodes of the data sets that comprise 3D data to be loaded into the available memory, loading the 3D data of the selected nodes into the memory; and visualizing the 3D data loaded into the memory on a display. Selecting the nodes comprises performing an LOD selection comprising obtaining camera-frustrum information defining a camera frustrum (10) comprising a near plane (11) and a far plane (12), dividing the camera frustrum by defining at least a near frustrum (15) and a background frustrum (16), defining a subset of data sets as foreground data sets based on an overlap of their nodes with the near frustrum, dividing the camera frustrum into a multitude of regions, allocating the available memory to the multitude of regions, and selecting, based on the allocated memory, the nodes that comprise 3D data to be loaded into the available memory. Allocating the available memory comprises determining, based at least on the amount of memory available, a tree-traversal depth, traversing the LOD structure of each foreground data set using the tree-traversal depth, recording all nodes that have an overlap with the camera frustrum and determining a screen space for each of the recorded nodes, mapping each recorded node to one of the regions, and assigning memory to each region based on the screen spaces of the nodes that have been mapped to the respective region.

The invention relates to the technical field of three-dimensional image processing, in particular to a distributed parallel processing and loading method for large-scale scene three-dimensional model data, which comprises the following steps of: acquiring a plurality of large-scale scene three-dimensional model patch coordinate sets, normal vector sets and material identification sets, calculating an adjacent matrix and judging a spatial aggregation region; the method comprises the following steps: segmenting and generating regional data subsets, calculating patch quantity and texture size matching calculation node capability, constructing a distribution path table, extracting a continuous triangular patch chain and reconstructing compressed data, calculating a loading priority in combination with a view angle, and loading and caching data according to scheduling. The spatial aggregation degree of adjacent patches is calculated, spatial regions are divided by combining material change points, the computing power and bandwidth capacity of nodes are dynamically matched and computed according to the patch number and the texture size, and the screen space intersection area and the viewpoint distance are computed by combining the user view angle to adjust the loading priority. And the visual angle-oriented visual scheduling response efficiency is improved.

The invention relates to the technical field of computer-aided design (CAD), and discloses a CAD large model quick conversion method, which comprises the following steps of: splitting a CAD three-dimensional model into topologically continuous triangular micro-units, performing compression coding on the triangular micro-units, and constructing a three-level index system; a multi-level LOD chain is generated, and dynamic smooth transition is achieved by combining screen space error constraint and curvature sensitivity; projecting the vertexes of the triangular micro-units to a UV space to generate and splice a virtual expanded graph into a giant graph set; and finally, integrating the discrete buffer area to form a single giant buffer, performing compression optimization, remapping positioning data by means of an index, realizing high-fidelity conversion processing of a complex bladed disc assembly model, supporting seamless connection from an original design file to a digital twin virtual scene, and realizing high-fidelity conversion processing of the complex bladed disc assembly model. And a three-dimensional model foundation which is free of geometric deformation and fully reserved in parameters is provided for compressor bladed disc crack simulation, dynamic roaming and full-life-cycle virtual-real fusion research.

The present application provides a screen-space rendering method and device for improving system performance. The method includes: obtaining a trigger instruction; obtaining image data of at least one frame of image; in response to the trigger instruction, rendering the image data in a specified mode to obtain at least one frame of rendered image, the specified mode including one of the following modes: a first mode, a second mode, and a third mode, the first mode being a screen-space reflection (SSR) mode, the second mode being a screen-space ambient occlusion (SSAO) mode, and the third mode being a combination of SSR and SSAO mode; and outputting the at least one frame of rendered image.

When monitoring multiple individuals using GPS devices, the goal is to optimize the map display according to the status of each individual within the limited screen space of the guardian's device (monitoring device), thereby improving the efficiency and visibility of monitoring. [Solution] The server (20) receives location information from multiple GPS terminals (40a, 40b). In response to a map display request from the monitoring terminal (30), the server (20) dynamically determines the display size of the map corresponding to each GPS terminal to be displayed on the monitoring terminal (30) based on the location information of each GPS terminal and related situation information (risk level, schedule, facility information, distance between terminals, etc.). Information including the determined display size and location information is transmitted from the server (20) to the monitoring terminal (30), and the monitoring terminal (30) displays the multiple maps on the display unit at the determined size based on the received information.

A method for facilitating invocation of a procedure by a first network node in a system comprising the first and second network node. The method includes storing, in the second network node, a data set comprising digital assets represented by graphical objects having locations in a virtual workspace, providing information associated with the graphical objects to the first network node, detecting a gesture or a user interaction event contacting a plurality of locations on a screen space of the first network node, obtaining an identification of a workflow procedure in dependence upon an interpretation of the gesture or user interaction event, wherein at least one of the locations corresponds to a location of the graphical object and wherein the workflow procedure has an input parameter associated with one or more properties of the graphical object, and facilitating invocation of the identified workflow procedure according to the input parameter.

The application provides a picture rendering method and device, computer equipment and a storage medium. Based on the spatial geometric parameters and appearance parameters of a Gaussian point, the equivalent maximum radius of each Gaussian point in a screen space is determined, and accurate bounding box information is generated accordingly. Compared with the approximate method of a traditional axis-aligned bounding box, the application can more accurately represent the actual coverage range of the Gaussian point on the screen, improve the accuracy and picture detail fidelity of the rasterization process, reduce the number of irrelevant tiles divided into the bounding box, and effectively improve the rasterization efficiency.

The invention discloses an adaptive subdivision CAD model rendering method based on a parameter domain triangle. The method comprises the following steps: firstly, uniformly converting a model curved surface into a Bezier curved surface, and initializing metadata of the Bezier curved surface; the curved surface bounding box and curvature data are uploaded to a GPU, and a corresponding storage buffer area is created; performing visual cone elimination through a task shader, calculating a dynamic subdivision factor by combining the side length and curvature of a screen space, and performing attenuation by considering a sight distance; the grid shader generates UV coordinates according to the subdivision level, after the UV coordinates are mapped to an effective parameter domain, accurate space coordinates are obtained through parallel calculation, and finally triangular primitives are assembled and sent to the pixel shader to complete rendering. In the rendering stage, correct performance can be achieved under the condition that original curved surface cutting information is not considered, high-precision real-time rendering of the CAD model is achieved, the method can be applied to a scene for rendering a large-scale CAD model, the geometric precision is guaranteed, and the frame rate of smooth interaction is achieved.

The invention discloses a screen space environment light shielding calculation method and device for a role, a medium and equipment. The method comprises the steps that at least one sampling point corresponding to a target calculation point is determined in a screen space; determining an initial shielding value corresponding to the sampling point, and updating the initial shielding value according to a camera space offset vector length corresponding to the sampling point and a target role elimination distance under the condition that the sampling point belongs to a target role pixel point; and determining the shielding value of the target calculation point according to the updated initial shielding value corresponding to each sampling point so as to render the screen space based on the shielding value of the target calculation point. According to the invention, while the real-time performance of the SSAO is maintained, the problem that artifacts and details are easy to lose at the junction of the role and the scene in the traditional SSAO is solved, and the sense of reality of role rendering and the performance of edge details are improved by processing the shielding contribution of the role pixels and the scene pixels in a differentiated manner.

The application discloses a kind of multi-resolution digital elevation model 3D visualization method and device, comprising: one, data preprocessing stage: S1, obtain digital elevation model DEM data;S2, calculate the multiple terrain factors of digital elevation model DEM data, principal component analysis, and the terrain feature comprehensive index is calculated;Two, real-time data processing stage: S3, multiple evaluation factor quadtree construction;S4, multiple evaluation factor quadtree updates;S5, terrain visualization: based on the multiple evaluation factor quadtree, screen space clipping is carried out, occlusion is removed, feature evaluation is carried out, obtains all points needing to be loaded, constructs irregular triangle net, is sent to GPU rendering, loads picture.