Box2D-Lite Walkthrough in Javascript: Body, World and Unconstrained Dynamics

All my Box2D-Lite posts have been transferred to my new blog site:

• Introduction

• Different Spaces and Drawing Boxes

• Unconstrained Dynamics

• Collision Detection

• Generating Contact Points

• Introduction to Constrained Dynamics

• Contact Constraint

• Revolute Joint

• Friction

• Solving Constraints

• Softening Constraints

• Warm Starting

Sample Code

And here is the sample code. You should see the box falling from the sky. I've added a bit of angular velocity, so it should be rotating as it falls due to gravity. However, there is no collision detection yet so the box will fall straight through the ground and will continue falling in the virtual world forever.

Useful References

https://box2d.org/files/ErinCatto_IterativeDynamics_GDC2005.pdf

https://box2d.org/files/ErinCatto_NumericalIntegration_GDC2009.pdf

https://box2d.org/files/ErinCatto_NumericalMethods_GDC2015.pdf

https://github.com/Helikin/Physics-Engine-Thesis/blob/master/A%20Unified%20Framework%20for%20Rigid%20Body%20Dynamics.pdf