Constant RIGID_BODY 

pub const RIGID_BODY: &str = "type RigidBody {\n  kind: Str = \"dynamic\";\n  mass: Number = 1;\n  velocity: Vec3 = Vec3 {};\n  angular_velocity: Vec3 = Vec3 {};\n  restitution: Number = 0.3;\n  friction: Number = 0.5;\n}";

Physical-body configuration for a Sphere or Box entity.

kind must be dynamic, fixed, or kinematic. Only dynamic bodies accept Force or Impulse; fixed bodies must have zero velocities.

Declaration

type RigidBody {
  kind: Str = "dynamic";
  mass: Number = 1;
  velocity: Vec3 = Vec3 {};
  angular_velocity: Vec3 = Vec3 {};
  restitution: Number = 0.3;
  friction: Number = 0.5;
}

Fields and methods

• kind: dynamic, fixed, or kinematic; defaults to dynamic.

• mass: Positive mass used by the collider; defaults to 1.

• velocity: Linear velocity in meters per second; defaults to zero.

• angular_velocity: Angular velocity in radians per second; defaults to zero.

• restitution: Bounciness in 0..=1; defaults to 0.3.

• friction: Contact friction in 0..=1; defaults to 0.5.

Advance a dynamic sphere

Systems run before physics in each fixed tick, so the second callback observes the position advanced by the first integration step.

let entity = spawn(Transform {});
add(entity, Sphere { radius: 0.5 });
add(entity, RigidBody { velocity: Vec3 { x: 1 } });
system Observe of Transform {
  func frame(dt: Number) -> Unit {
    if tick > 1 { print(self.position.x > 0); }
  }
}

Choose a fixed body

Fixed bodies keep zero velocity.

let value = RigidBody { kind: "fixed" };
print(value.kind);