Polygonjs Plugin Physics Example

This repository shows how to use the Physics Plugin for the WebGL engine Polygonjs.

Open the scene in the WebGL editor

yarn && yarn polygon

and open your browser at:

http://localhost:8091?scene=default

This will open the scene saved in this repo. It is a simple scene with the following setup:

The right branch, which creates the moving rigid bodies:

• a Text node to create the geometry of a word
• a Scatter node to create points on the text
• a AttribCreate to add the pscale attribute on each point, with the expression 1*rand(@ptnum+945)+0.5, which will give a random scale to each rigid body.
• a Copy node to create boxes on all the points
• a PhysicsRbdAttributes to add the attributes necessary to the simulation
• another AttribCreate node to randomize the restitution attribute.

The left branch, which creates the static rigid bodies:

• a box node to create a box
• a transform to scale the geometry
• a second transform to position the object
• a PhysicsRbdAttributes to set the attributes for the simulation. The difference to the moving RBDs is that active is set to false, and mass is set to a very high number.
• both boxes are merged (make sure to have the merge node set to separate objects by setting compact to false), so that their geometries are not merged into a single object.

and finally both branches are merged into the PhysicsSolver, where all attributes are set to default.

Open the export scene without the editor

yarn && yarn run snowpack dev

and open your browser at:

http://localhost:8080/