Struct HexGridHomographyMesh 

pub struct HexGridHomographyMesh {
    pub min_q: i32,
    pub min_r: i32,
    pub cells_q: usize,
    pub cells_r: usize,
    pub px_per_cell: f32,
    pub valid_triangles: usize,
    pub rect_width: usize,
    pub rect_height: usize,
    /* private fields */
}

Per-triangle homography mesh over a hex grid.

Each parallelogram cell in axial space (q, r) → (q+1, r+1) is split into two triangles:

• Lower: (q,r), (q+1,r), (q,r+1) — when frac_q + frac_r ≤ 1
• Upper: (q+1,r), (q,r+1), (q+1,r+1) — when frac_q + frac_r > 1

Fields

min_q: i32

min_r: i32

cells_q: usize

Number of parallelogram cells along q.

cells_r: usize

Number of parallelogram cells along r.

px_per_cell: f32

Rectified pixels per grid cell edge.

valid_triangles: usize

Number of valid triangle cells.

rect_width: usize

Rectified image dimensions.

rect_height: usize

Implementations

impl HexGridHomographyMesh

pub fn from_corners( corners: &HashMap<GridIndex, Point2<f32>>, px_per_cell: f32, ) -> Result<Self, HexMeshError>

Build per-triangle transforms from a hex grid corner map.

• corners: map from axial grid index (q=i, r=j) to image position.
• px_per_cell: rectified pixels per grid cell edge.

pub fn rect_to_img_affine(&self, p_rect: Point2<f32>) -> Option<Point2<f32>>

Map a point in global rectified pixel coordinates to image coordinates using the per-triangle affine transform.

Returns None if the point lies outside the mesh or the cell is invalid.

pub fn rect_to_img(&self, p_rect: Point2<f32>) -> Option<Point2<f32>>

Map a point in global rectified pixel coordinates to image coordinates using the per-triangle homography.

Returns None if the point lies outside the mesh or the cell is invalid.

Trait Implementations

impl Clone for HexGridHomographyMesh

fn clone(&self) -> HexGridHomographyMesh

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HexGridHomographyMesh

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

Formats the value using the given formatter.