Struct PyPbdSolver 

pub struct PyPbdSolver {
    pub positions: Vec<f64>,
    pub prev_positions: Vec<f64>,
    pub inv_masses: Vec<f64>,
    pub constraints: Vec<PbdConstraint>,
    pub substeps: u32,
    pub gravity: [f64; 3],
}

Position-based dynamics (XPBD) solver.

Fields

positions: Vec<f64>

Current particle positions (flat [x0, y0, z0, x1, …]).

prev_positions: Vec<f64>

Previous particle positions (for XPBD velocity estimation).

inv_masses: Vec<f64>

Per-particle inverse mass (0 = kinematic/fixed).

constraints: Vec<PbdConstraint>

Constraints.

substeps: u32

Number of substeps per time step.

gravity: [f64; 3]

Gravity vector.

Implementations

impl PyPbdSolver

pub fn new(positions: Vec<f64>, inv_masses: Vec<f64>) -> Self

Create a new PBD solver.

pub fn add_stretch(&mut self, i: usize, j: usize, compliance: f64)

Add a stretch constraint between two particles.

pub fn add_volume( &mut self, i: usize, j: usize, k: usize, l: usize, compliance: f64, )

Add a volume conservation constraint for a tetrahedron.

pub fn substep(&mut self, dt: f64)

Perform one substep of XPBD simulation.

pub fn step(&mut self, dt: f64)

Step the simulation for one full time step (using substeps).

pub fn particle_count(&self) -> usize

Return particle count.

Trait Implementations

impl Clone for PyPbdSolver

fn clone(&self) -> PyPbdSolver

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PyPbdSolver

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PyPbdSolver

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PyPbdSolver

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.