pub(crate) fn collision_path_axis_block_bounds(
start: f64,
end: f64,
max_steps: usize,
) -> Option<(i32, i32)>Expand description
Returns the inclusive block-coordinate envelope visited by one axis of Vanilla’s block DDA.
Axis crossing counts are independent of inter-axis tie order: the traversal cannot finish
until every finite next value is greater than one. Replaying the scalar recurrence also
retains the rare terminal step caused by floating-point rounding at next == 1.