MetricTensor4D

deep_causality

Trait MetricTensor4D 

Source 
pub trait MetricTensor4D {
    // Required methods
    fn metric_tensor(&self) -> [[f64; 4]; 4];
    fn update_metric_tensor(&mut self, new_metric: [[f64; 4]; 4]);
}
Expand description

Trait for exposing and modifying a local 4×4 spacetime metric tensor.

This trait defines both read and write access to a spacetime metric gᵤᵥ, typically used for computing intervals and geodesics. By including a mutation method, the curvature at a point can be dynamically updated in response to external fields, symbolic programs, or causal evolution.

§Convention

  • Tensor is 4×4, with ordering [t, x, y, z]
  • Signature is (− + + +)
  • Symmetry (gᵤᵥ = gᵥᵤ) must be preserved by caller

Required Methods§

Source

fn metric_tensor(&self) -> [[f64; 4]; 4]

Returns the current local metric tensor gᵤᵥ.

Source

fn update_metric_tensor(&mut self, new_metric: [[f64; 4]; 4])

Updates the internal metric tensor to a new 4×4 matrix.

§Safety
  • Caller must ensure the matrix is symmetric
  • In curved models, tensor should be valid under coordinate charts

Implementors§