Struct HeightfieldRayTraversal 

pub struct HeightfieldRayTraversal {
    pub cell_col: isize,
    pub cell_row: isize,
    pub done: bool,
    /* private fields */
}

State for a DDA grid-traversal ray cast over a height field.

Call HeightfieldRayTraversal::new to set up the traversal, then call HeightfieldRayTraversal::next_cell repeatedly to visit each cell along the ray in XZ-projection order.

Fields

cell_col: isize

Current cell column index.

cell_row: isize

Current cell row index.

done: bool

True once the traversal has finished.

Implementations

impl HeightfieldRayTraversal

pub fn new( hf: &HeightField, ray_origin: [f64; 3], ray_dir: [f64; 3], max_t: f64, ) -> Option<Self>

Initialize a DDA traversal over hf starting at ray_origin in direction ray_dir (need not be normalised). max_t bounds the traversal.

Returns None if the ray does not enter the XZ footprint of the grid.

pub fn next_cell(&mut self) -> Option<(usize, usize, f64)>

Advance to the next cell along the ray.

Returns (col, row, t_entry) for the cell just entered, or None when the traversal exits the grid.

Trait Implementations

impl Clone for HeightfieldRayTraversal

fn clone(&self) -> HeightfieldRayTraversal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HeightfieldRayTraversal

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

Formats the value using the given formatter.