虚拟现实技术03-物理仿真-2024

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2025-01-13 0 0 2.33MB 81 页 5.9玖币

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粒子系统及弹簧粒子系统

(Particle systems & mass-spring)

第三讲物理仿真

outline

•Introduction

•Basic idea of Particle system

•Equations of Motion

•Forces

•Collision

•Advanced particle system

•Mass-spring

•Cloth simulation

Kinematics and Dynamics

•Kinematics

–Considers only motion

–Determined by positions, velocities, accelerations

•Dynamics

–Considers underlying forces

–Compute motion from initial conditions and physics

Passive vs. Active Dynamics

Types of dynamics

•Point

•Rigid body

•Deformable body

(include clothes, fluids, smoke, etc.)

Animation by Mark Carlson

Today we focus on point dynamics

•But we use tons of points

•Particles systems

Videos

Fireworks

Fire

Smoke Water

outline

•Introduction

•Basic idea of Particle system

•Equations of Motion

•Forces

•Collision

•Advanced particle system

•Mass-spring

•Cloth simulation

Particle Systems

•A particle is a point mass

– Mass

–Position

–Velocity

–Acceleration

–Color

–Lifetime

•Use lots of particles to model complex

phenomena

– Keep array of particles

Particle Systems

•For each frame:

–Create new particles and assign attributes

–Delete any expired particles

–Update particles based on attributes and physics

–Render particles

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摘要：

1粒子系统及弹簧粒子系统(Particlesystems&mass-spring)第三讲物理仿真2outline•Introduction•BasicideaofParticlesystem•EquationsofMotion•Forces•Collision•Advancedparticlesystem•Mass-spring•Clothsimulation3KinematicsandDynamics•Kinematics–Considersonlymotion–Determinedbypositions,velocities,accelerations•Dynamics–Considers...

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虚拟现实技术03-物理仿真-2024

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