Enum Constraint 

pub enum Constraint {
    SpringTarget {
        node_id: NodeId,
        target: Vec3,
        stiffness: f32,
        damping: f32,
    },
    Dampen {
        node_id: NodeId,
        damping: f32,
    },
    ClampBounds {
        node_id: NodeId,
        min: Vec3,
        max: Vec3,
    },
}

A positional constraint applied to a scene node.

Variants

SpringTarget

Pull a node toward a fixed world-space target using a spring with damping.

Uses semi-implicit Euler integration: velocity updated by spring and damping forces, then position updated by velocity.

Fields

node_id: NodeId

Target node.

target: Vec3

World-space point the spring pulls toward.

stiffness: f32

Spring stiffness in 1/s^2. Higher values pull more aggressively.

damping: f32

Velocity damping coefficient in 1/s. Prevents oscillation.

Dampen

Drag a node’s velocity to zero over time.

Velocity is multiplied by (1 - damping * dt) each step. Requires an initial velocity in the internal state (starts at zero).

Fields

node_id: NodeId

Target node.

damping: f32

Damping coefficient in 1/s.

ClampBounds

Clamp a node’s world-space position to stay inside an axis-aligned box.

Velocity is zeroed on contact with a boundary.

Fields

node_id: NodeId

Target node.

min: Vec3

Minimum corner of the allowed region.

max: Vec3

Maximum corner of the allowed region.

Trait Implementations

impl Clone for Constraint

fn clone(&self) -> Constraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constraint

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

Formats the value using the given formatter.