Struct SoftBodyParticle 

pub struct SoftBodyParticle { /* private fields */ }

One particle (point mass) of a soft body: plain state owned by its crate::dynamics::SoftBody, given its own solver body for the step when the body is awake. A pinned particle (inv_mass == 0) is kinematic: it moves at its velocity or toward its target.

Implementations

impl SoftBodyParticle

pub fn position(&self) -> Vec2

The world-space position of this particle.

pub fn velocity(&self) -> Vec2

The world-space velocity of this particle.

pub fn force(&self) -> Vec2

The user force currently applied to this particle (see crate::dynamics::SoftBody::add_particle_force).

pub fn kinematic_target(&self) -> Option<Vec2>

The position a pinned particle is moving to over the next step, if one was set with crate::dynamics::SoftBody::set_particle_kinematic_target.

pub fn rest_position(&self) -> Vec2

The position of this particle in the rest shape (relative to the rest center of mass). With a plastic material the rest shape follows the elements’ flow (see [SoftBodyMaterial::plastic_yield]); Self::initial_rest_position predates any flow.

pub fn initial_rest_position(&self) -> Vec2

The position of this particle in the soft body’s rest shape before any plastic flow (its position at insertion, relative to the rest center of mass).

pub fn mass(&self) -> f32

The nominal mass of this particle.

pub fn inv_mass(&self) -> f32

The inverse mass of this particle (0.0 for pinned particles).

pub fn is_pinned(&self) -> bool

Whether this particle is pinned (infinite mass, moved kinematically).

pub fn is_damaged(&self) -> bool

Whether an element touching this particle has torn (or crate::dynamics::SoftBody::set_particle_damaged marked it). The elements around a damaged particle lose the interior strength of [SoftBodyMaterial::interior_strength]: a tear runs on from where it started.

pub fn is_on_surface(&self) -> bool

Whether this particle is a vertex of the body’s surface (a boundary segment in 2D, a boundary triangle in 3D). An element whose particles are all interior gets the material’s [SoftBodyMaterial::interior_strength].

Trait Implementations

impl Clone for SoftBodyParticle

fn clone(&self) -> SoftBodyParticle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SoftBodyParticle

impl Debug for SoftBodyParticle

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

Formats the value using the given formatter.