Those four spheres in the corners will simulate our soft body. Wait, why imagine? Here is an illustration!

Each corner has a sphere in its position. The bottom line is that you cannot use a single impostor to create soft bodies, like a cloth. So, if we create a ground object (a flat plane with predefined dimensions) and register its impostor (thus creating its physics body), the physics engine will always treat it as a very narrow box that cannot be changed. If you do change the object's parameters (mainly size, but also position vertices in case of a mesh impostor), you will have to create a new (rigid!) body for this object. A box will always have the same dimensions. A sphere will always have the same radius. It doesn't change during the entire scene's life. That means, in general, that the physics body is not elastic. Physics engines (at least the ones integrated in Babylon.js) relay on a very important characteristic of an object- rigidity.

Let's first understand what's going on! Now, Why is It That Complex? In this tutorial/blog post/infomercial, I will recreate Cannon's cloth demo using Babylon. With a big thanks to Schteppe, the creator of the wonderful Cannon.js-the physics engine I will mainly use in this tutorial. My implementation of them (and the integration in Babylon's architecture itself) was influenced heavily by this implementation. It can be compared to a point in space so it reduces the need for heavy calculations when checking for collisions-it is a point-to-body kind of collision, which is much simpler to calculate.Д¬annon's cloth demo ( ) is showing the power of particles. After making the changes to the physics engine architecture in Babylon.js, I added a new impostor type, influenced by Cannon's wonderful impostors implementations-the Particle Impostor.

Cloth x-particles 4