Struct VolumeConstraint 

pub struct VolumeConstraint {
    pub indices: [usize; 4],
    pub rest_volume: Real,
    pub compliance: Real,
    /* private fields */
}

Volume-preservation constraint for a tetrahedral mesh.

Operates over all tetrahedra whose indices are stored in the constraint.

Fields

indices: [usize; 4]

Indices of the four vertices forming the tetrahedron.

rest_volume: Real

Rest volume (positive).

compliance: Real

Compliance (XPBD).

Implementations

impl VolumeConstraint

pub fn new(indices: [usize; 4], rest_volume: Real, compliance: Real) -> Self

Create a volume constraint with an explicit rest volume.

pub fn from_particles( indices: [usize; 4], particles: &[SoftParticle], compliance: Real, ) -> Self

Build a volume constraint whose rest volume matches the current configuration.

pub fn reset_lambda(&mut self)

Reset the Lagrange multiplier.

pub fn compute_tet_volume(p0: &Vec3, p1: &Vec3, p2: &Vec3, p3: &Vec3) -> Real

Signed volume of a tetrahedron.

Trait Implementations

impl Clone for VolumeConstraint

fn clone(&self) -> VolumeConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VolumeConstraint

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

Formats the value using the given formatter.

impl SoftConstraint for VolumeConstraint

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

Project (correct) particle positions to satisfy this constraint.