Struct DistanceConstraint 

pub struct DistanceConstraint {
    pub i: usize,
    pub j: usize,
    pub rest_length: Real,
    pub compliance: Real,
    /* private fields */
}

XPBD distance constraint between two particles.

Maintains a rest length with optional compliance (softness).

Fields

i: usize

Index of the first particle.

j: usize

Index of the second particle.

rest_length: Real

Rest length.

compliance: Real

Compliance (inverse stiffness). 0 = perfectly rigid.

Implementations

impl DistanceConstraint

pub fn new(i: usize, j: usize, rest_length: Real, compliance: Real) -> Self

Create a new distance constraint.

pub fn from_particles( i: usize, j: usize, particles: &[SoftParticle], compliance: Real, ) -> Self

Build a constraint whose rest length is the current distance between the two particles.

pub fn reset_lambda(&mut self)

Reset the Lagrange multiplier (call before a new solver iteration sequence).

Trait Implementations

impl Clone for DistanceConstraint

fn clone(&self) -> DistanceConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DistanceConstraint

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

Formats the value using the given formatter.

impl SoftConstraint for DistanceConstraint

fn project(&mut self, particles: &mut [SoftParticle], dt_sub: Real)

Project (correct) particle positions to satisfy this constraint.