pub type SpringMatrixWires = [Wire; 4];Expand description
The 4 cells of a spring matrix that the host writes before each evaluation, e.g.
spring_matrix_power(spring_step_matrix(constants, 4.0), steps) from crate::timing:
displacement' = m[0] × displacement + m[1] × velocity, velocity' = m[2] × displacement + m[3] × velocity.