A CodePen by suffick. Physics Playground - A small physics engine (dubbed JSVerlet). The engine is a work in progress, this a demo of what it can do at the moment.

Instructions:

- Left click to drag points (corners, joints etc).

- Right click to delete a point.

- Hold ctrl to enter edit mode, release to exit.

When in edit mode:

- Click to add points, hold alt to make fixed points.

- New points will join to the last point by default.

- Press shift to unselect a point.

- Select any two points to join them.

http://lonely-pixel.com/lab/jsverlet/