4 results about "Particle system" patented technology

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 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.

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.