Struct WorldBuilder 

pub struct WorldBuilder { /* private fields */ }

Fluent builder for WorldDef.

Chain configuration calls and finish with build(). All fields map 1:1 to the upstream b2WorldDef.

Implementations

impl WorldBuilder

pub fn gravity<V: Into<Vec2>>(self, g: V) -> Self

Set gravity vector in meters per second squared.

pub fn restitution_threshold(self, v: f32) -> Self

Restitution threshold (m/s) under which collisions don’t bounce.

pub fn hit_event_threshold(self, v: f32) -> Self

Impulse magnitude that generates hit events.

pub fn contact_hertz(self, v: f32) -> Self

Contact solver target stiffness in Hertz.

pub fn contact_damping_ratio(self, v: f32) -> Self

Contact damping ratio (non-dimensional).

pub fn contact_speed(self, v: f32) -> Self

Velocity used by continuous collision detection.

pub fn maximum_linear_speed(self, v: f32) -> Self

Maximum linear speed clamp for bodies.

pub fn enable_sleep(self, flag: bool) -> Self

Enable/disable sleeping globally.

pub fn enable_continuous(self, flag: bool) -> Self

Enable/disable continuous collision detection globally.

pub fn enable_contact_softening(self, flag: bool) -> Self

Enable/disable contact softening.

pub fn worker_count(self, n: i32) -> Self

Number of worker threads Box2D may use.

pub fn build(self) -> WorldDef

Trait Implementations

impl Clone for WorldBuilder

fn clone(&self) -> WorldBuilder

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WorldBuilder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<WorldDef> for WorldBuilder

fn from(def: WorldDef) -> Self

Converts to this type from the input type.