Project Settings

There are some options which can be configured for the Rapier library that change the physics simulation for the whole project. These can be accessed from Project Settings -> Physics -> Rapier:

• Num Internal Pgs Iterations: Number of internal Project Gauss Seidel (PGS) iterations run at each solver iteration.
• Num Additional Friction Iterations: Number of addition friction resolution iteration run during the last solver sub-step.
• Num Iterations: The number of solver iterations run by the constraints solver for calculating forces
• Max Ccd Sub Steps: Maximum number of sub steps performed by the solver.
• Contact Skin: A skin that is added to each shape. This can also be added individually to bodies by calling:

  var contact_skin = 0.1 # Any value
  RapierPhysicsServer2D.body_set_extra_param(body_rid, 0, contact_skin)
  # or
  RapierPhysicsServer3D.body_set_extra_param(body_rid, 0, contact_skin)
• Length Unit 2D: The approximate size of most dynamic objects in the scene. For 2D it is 100 as gravity in Godot is 980, and in real life it is 9.8.
• Length Unit 3D: The approximate size of most dynamic objects in the scene. For 3D it is 1 as gravity in Godot is 9.8, and in real life it is 9.8.
• Fluid Particle Radius: The Particle Radius used for each Particle when simulating Fluids. For 2D it defaults to 20 and for 3D it defaults to 0.5
• Fluid Smoothing Factor: The Smoothing Factor used when simulating Fluids.