pyRigidBody3d

A simple 3D rigid body simulation written in python

Local Installation

pip install pyrigidbody3d

Try it out

Visit this Google Colab example with meshcat visualization or a plain text example to try it out.

Step by step development of a vending coffee machine project, including tkinter, sqlite3, simulation, etc.

2 Dec 5, 2021

Bitflip Fault Simulation Platform by Daniele Rizzieri (2021)

BFSP [v1.05] Bitflip Fault Simulation Platform by Daniele Rizzieri (2021) The platform injects a random bitflip in each of N copies of a binary file.

2 Nov 5, 2022

Bitflip Fault Simulation Platform by Daniele Rizzieri (2021)

SEE Injection Framework 2021 This repository contains two Single Event Effect (SEE) injection platforms. The first one is called BFSP - "Bitflip Fault

2 Nov 5, 2022

MeerKAT radio telescope simulation package. Built to simulate multibeam antenna data.

MeerKATgen MeerKAT radio telescope simulation package. Designed with performance in mind and utilizes Just in time compile (JIT) and XLA backed vectro

6 Jan 23, 2022

Simulation simplifiée du fonctionnement du protocole RIP

ProjetRIPlay v2 Simulation simplifiée du fonctionnement du protocole RIP par Eric Buonocore le 18/01/2022 Sur la base de l'exercice 5 du sujet zéro du

2 Feb 15, 2022

Liquid Rocket Engine Cooling Simulation

Liquid Rocket Engine Cooling Simulation NASA CEA The implemented class calls NASA CEA via RocketCEA. INSTALL GUIDE In progress install instructions fo

1 Jan 30, 2022

Simple, high-school-leveled sequence library written in Python / 간단한 고등학교 수준 수열 라이브러리 (Python)

Simple, high-school-leveled sequence library written in Python

1 Dec 8, 2021

MiniJVM is simple java virtual machine written by python language, it can load class file from file system and run it.

MiniJVM MiniJVM是一款使用python编写的简易JVM，能够从本地加载class文件并且执行绝大多数指令。支持的功能 1.从本地磁盘加载class并解析 2.支持绝大多数指令集的执行 3.支持虚拟机内存分区以及对象的创建 4.支持方法的调用和参数传递 5.支持静态代码块的初始化不支

60 Apr 1, 2022

A simple script that shows important photography times. written in python.

13 Oct 16, 2022

Comments

understand resolve_collision approach

Thanks for the simple and clean repo.

TinyDifferentialSimulator repo and the paper, like Interactive Simulation of Rigid Body Dynamics in Computer Graphics, really help me understand simulators a lot.

I have the question for the calculation for contact force, in this toy repo:

  if cp.distance < 0:
    baumgarte_rel_vel = erp * cp.distance / dt
  rel_vel = cp.body_a.get_velocity(rel_posA) - cp.body_b.get_velocity(rel_posB)
  normal_rel_vel = cp.world_normal_on_b.dot(rel_vel)
  if normal_rel_vel < 0.0:
    temp1 = cp.body_a.inv_inertia_world.dot(
        np.cross(rel_posA, cp.world_normal_on_b))
    temp2 = cp.body_b.inv_inertia_world.dot(
        np.cross(rel_posB, cp.world_normal_on_b))
    ang = cp.world_normal_on_b.dot(
        np.cross(temp1, rel_posA) + np.cross(temp2, rel_posB))
    impulse = (-(1.0 + cp.body_b.restitution) * normal_rel_vel -
               baumgarte_rel_vel) / (
                   cp.body_a.inv_mass + cp.body_b.inv_mass + ang)
    if impulse > 0:

Why do we need the variable ang when calculating the impulse, does this term have a physical meaning? (The thesis link has broken, is there an intuitive explanation for calculation?)

opened by qsh-zh 1