Struct ManifoldPoint 

pub struct ManifoldPoint {
    pub anchor_a: Vec2,
    pub anchor_b: Vec2,
    pub separation: f32,
    pub base_separation: f32,
    pub normal_impulse: f32,
    pub tangent_impulse: f32,
    pub total_normal_impulse: f32,
    pub normal_velocity: f32,
    pub id: u16,
    pub persisted: bool,
}

A manifold point is a contact point belonging to a contact manifold. It holds details related to the geometry and dynamics of the contact points. Box2D uses speculative collision so some contact points may be separated. (b2ManifoldPoint)

Fields

anchor_a: Vec2

Location of the contact point relative to body A’s center of mass in world space.

anchor_b: Vec2

Location of the contact point relative to body B’s center of mass in world space.

separation: f32

The separation of the contact point, negative if penetrating

base_separation: f32

Cached separation used for contact recycling

normal_impulse: f32

The impulse along the manifold normal vector

tangent_impulse: f32

The friction impulse

total_normal_impulse: f32

The total normal impulse applied across sub-stepping and restitution

normal_velocity: f32

Relative normal velocity pre-solve. Used for hit events.

id: u16

Uniquely identifies a contact point between two shapes

persisted: bool

Did this contact point exist the previous step?

Trait Implementations

impl Clone for ManifoldPoint

fn clone(&self) -> ManifoldPoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ManifoldPoint

impl Debug for ManifoldPoint

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

Formats the value using the given formatter.

impl Default for ManifoldPoint

fn default() -> ManifoldPoint

Returns the “default value” for a type.

impl PartialEq for ManifoldPoint

fn eq(&self, other: &ManifoldPoint) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ManifoldPoint