12 results about "Particle system" patented technology

The invention relates to the technical field of computer rendering, and discloses a dynamic effect processing method and device, electronic equipment and a program product, and the dynamic effect processing method provided by the invention simulates a flame effect in a virtual scene through combustion bitmaps of multiple cycles, and avoids uncertainty of a diffusion range caused by simulation of flame diffusion through particles. Meanwhile, as the combustion bitmap is used for simulating diffusion, flame diffusion simulation can be carried out without calculating the track and the drop point of each particle through a CPU, and the CPU pressure caused by the fact that a large number of particles in a particle system need to be simulated in the related technology is solved. In the rendering process, a map does not need to be added for each particle, the corresponding position in the virtual scene is directly rendered according to the combustion bitmap, the rendering process and the simulated flame diffusion process are separated, the occurrence of a large number of particles is reduced, and the load of the GPU can be reduced.

The application discloses a kind of based on unreal engine's shock wave overpressure damage test visual simulation method and simulation system, belong to the field of explosion impact.The application is based on the pre-establishment of three-dimensional basic model based on shock wave overpressure test, utilizes physical engine design interactive interface, constructs classification grading targeted overpressure damage criterion, through simulating the morphological change of shock wave in overpressure impact process, and according to the damage efficiency of warhead and the actual damage effect of target, using unreal engine carries real-time rendering, particle system, BluePrint linear modular function, realize the visual simulation of shock wave overpressure damage test.The application can intuitively show the realistic three-dimensional scene of shock wave overpressure damage test, with the advantages of immersive interaction and building arbitrary virtual damage test scene, also has the advantages of small computer resource consumption, strong interaction, rich scene resources, excellent rendering effect, high flexibility.

The present disclosure provides a particle special effect rendering method for simulating extreme working conditions in a virtual engine, comprising: obtaining fire scene parameters, and constructing a decoupled particle system architecture in the virtual engine according to the fire scene parameters to generate a particle initialization result. Determine the fire source area particle quota through the particle initialization result, and generate fire particles based on the fire source area particle quota to construct different types of initial particle states. Based on the different types of initial particle states, the dynamics trajectory of the fire particles is calculated, and the first particle state after updating the particle trajectory is determined according to the dynamics trajectory. Determine the interaction behavior between the fire particles and the scene material through the first particle state, and generate the second particle state after updating the particle behavior according to the interaction behavior. According to the second particle state, the particle rendering is carried out to generate a dynamic light and shadow fusion result, and a fire particle special effect frame is drawn according to the dynamic light and shadow fusion result, realizing the real-time rendering of the particle reality.

The invention provides a particle effect rendering method for simulating an extreme working condition in a virtual engine, and the method comprises the steps: obtaining a fire scene parameter, and constructing a decoupling type particle system architecture in the virtual engine according to the fire scene parameter, so as to generate a particle initialization result. And determining the particle quota of the fire source region through the particle initialization result, and generating fire particles based on the particle quota of the fire source region to construct different types of initial particle states. And based on the different types of initial particle states, calculating a dynamic trajectory of the fire particles, and determining a first particle state after the particle trajectory is updated according to the dynamic trajectory. And determining an interaction behavior between the fire particles and the scene material through the first particle state, and generating a second particle state after the particle behavior is updated according to the interaction behavior. And performing particle rendering according to the second particle state to generate a dynamic light and shadow fusion result, and drawing a fire particle special effect frame according to the dynamic light and shadow fusion result to realize particle authenticity and real-time rendering.

The application provides a GPU fluid simulation method for real-time interactive application, and relates to the technical field of fluid simulation. The method first uses a particle system to emit a large number of particles, calculates fluid particle positions using a position-based fluid particle simulation algorithm, updates the motion state of the particles, then obtains a smooth fluid surface according to the particle positions through screen space processing, and finally uses a realistic rendering method to color the fluid surface to obtain a water body image. Since the state update of the large number of particles and the pixel-level calculation of the screen space are both large-scale parallel calculations, they are suitable for GPU processing, so all the calculation processes involved in the method are run on the GPU end. The method can be widely applied to various demand scenarios in the fields of industrial simulation and electronic games.

The invention discloses a spatial flow field display method and system based on a three-dimensional engine particle system, and belongs to the field of spatial flow field display, and the method comprises the steps: obtaining original flow field data from a turboshaft engine test bed, carrying out the preprocessing and standardization, constructing a database capable of being efficiently read by a three-dimensional engine, and carrying out the three-dimensional scene construction stage, polygonal simplification and topological optimization are carried out on a physical model in a flow field, it is ensured that an engine can keep high-performance operation while the visual effect is ensured, a set of space coordinate-particle trajectory-particle dynamic binding mapping mechanism is established, and the dynamic binding of particles is realized. The abstract flow field data can accurately drive the motion trail of each particle in the particle system, and accurate correspondence between the data and the visual effect is achieved. According to the method, the script is updated through the frame, the particle system can respond to data changes in the database in real time, the motion state is dynamically adjusted, the instantaneous characteristics of the flow field are vividly displayed, and a powerful and convenient interactive tool is provided for flow field analysis.

The application discloses a kind of three-dimensional special-shaped particle general contact detection method, system, platform and storage medium based on spherical harmonics and machine learning, by introducing spherical harmonics as unified shape descriptor, and constructs a general machine learning model that can accept the descriptor as input, the paradigm breakthrough of special-shaped particle contact detection in discrete element simulation is realized.I.e.the scheme realizes the generalization processing of single model to multiple or even unknown special-shaped particle shape, solves the fixed limit of existing machine learning method one shape one model;In terms of computing performance, forward inference is replaced by complex geometry intersection, so that the contact detection efficiency is improved by several times to several tens of times compared with traditional algorithm, and the more complex the particle shape is, the more significant the advantage is;At the same time, spherical harmonics modeling reduces the memory occupation of shape data, so that large-scale, multi-shape particle system high-fidelity efficient simulation becomes possible, and promotes the application of particle mechanics numerical simulation technology in engineering practice.

The present disclosure provides a simulation data transmission method adapted to transmit data of a three-dimensional simulation space over a network for rendering presentation on at least one graphical user interface, the method comprising: performing a first calculation comprising processing particles of the three-dimensional simulation space according to a smoothed particle hydrodynamic algorithm, generating first particle data; executing first coding according to the first particle data to generate second particle data; executing compression according to the second particle data to generate third particle data; and transmitting the third particle data through the network. According to the method, the bit mark, the space division, the data compression and the sliding window are combined, the technical scheme for real-time data transmission between the SPH particle system and the graphic rendering system is formed, the method does not depend on network hardware or protocols, and the system complexity and the deployment cost are reduced.

The invention discloses a real-time mechanical simulation method based on a two-dimensional regular grid, and relates to the cross technical field of computer-aided engineering and high-performance scientific computation.The real-time mechanical simulation method comprises the following steps that the two-dimensional regular grid to be simulated is dispersed into a particle system; defining boundary conditions based on the particle system; carrying out local kinematics information calculation on each particle in the particle system; modeling is carried out for a two-dimensional plane strain problem, and physical constraints are constructed; carrying out display iteration solution on the particle system based on physical constraints; repeating the steps S1 to S5, and carrying out real-time mechanical simulation circulation; based on a two-dimensional regular grid and a particle system, in combination with a local rotation matrix and physical constraint modeling, high-precision and real-time mechanical simulation is realized, while the efficient interactivity of a graphic method is kept, real physical parameters such as Poisson's ratio are introduced, the Poisson effect and large deformation behavior are accurately simulated, and the shear locking problem of a traditional finite element is avoided.

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 application provides a three-dimensional dynamic cloud chart visualization method based on meteorological data, and belongs to the technical field of meteorological observation. The application creates a Niagara particle system in a Unreal Engine, optimizes Perlin noise algorithm parameters based on a double-layer game model, realizes initial field drawing of a three-dimensional cloud chart through a light ray stepping mode, and performs light calculation in combination with a spherical harmonic function. Parallel processing is realized by using multiple CUDA streams and a double-layer sub-thread grid. The problem of environmental occlusion is solved by setting the starting point and ending point of the light ray through a bounding box. In the particle updating process, the grid point position is updated according to the wind direction data, and a cloud layer evolution simulation algorithm based on the lattice Boltzmann method is introduced to simulate the fluid dynamics behavior, thereby solving the technical problem that the rendering quality and the calculation efficiency are difficult to achieve dynamic balance in the three-dimensional dynamic cloud chart visualization process.

This application discloses a spatial flow field display method and system based on a 3D engine particle system, belonging to the field of spatial flow field display. The method includes: acquiring raw flow field data from a turboshaft engine test stand, preprocessing and standardizing it to construct a database that can be efficiently read by a 3D engine; in the 3D scene construction stage, performing polygon simplification and topology optimization on the physical model in the flow field to ensure that the engine can maintain high-performance operation while maintaining visual effects; and establishing a mapping mechanism of spatial coordinates-particle trajectory-particle dynamic binding, enabling abstract flow field data to accurately drive the motion trajectory of each particle in the particle system, achieving a precise correspondence between data and visual effects. Through frame update scripts, this application allows the particle system to respond in real time to data changes in the database, dynamically adjusting its motion state and vividly displaying the instantaneous characteristics of the flow field, providing a powerful and convenient interactive tool for flow field analysis.