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Add view region iterator

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This commit is contained in:
Maximilian Ammann 2022-03-07 14:50:35 +01:00
parent b30beb8128
commit c77b26bcf4
1 changed files with 49 additions and 3 deletions
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52
src/coords.rs
View File

@ -1,6 +1,6 @@
//! File which exposes all kinds of coordinates used throughout mapr
use crate::util::math::{div_away, div_floor};
use crate::util::math::{div_away, div_floor, Aabb2};
use cgmath::num_traits::Pow;
use cgmath::{Matrix4, Point3, SquareMatrix, Vector3};
use std::fmt;
@ -251,10 +251,43 @@ impl From<Point3<f64>> for WorldCoords {
}
}
pub struct ViewRegion {
min_tile: TileCoords,
max_tile: TileCoords,
z: u8,
}
impl ViewRegion {
pub fn new(view_region: Aabb2<f64>, zoom: f64, z: u8) -> Self {
let min_world: WorldCoords = WorldCoords::at_ground(view_region.min.x, view_region.min.y);
let min_world_tile: WorldTileCoords = min_world.into_world_tile(z, zoom);
let min_tile: TileCoords = min_world_tile.into();
let max_world: WorldCoords = WorldCoords::at_ground(view_region.max.x, view_region.max.y);
let max_world_tile: WorldTileCoords = max_world.into_world_tile(z, zoom);
let max_tile: TileCoords = max_world_tile.into();
Self {
min_tile,
max_tile,
z,
}
}
pub fn iter(&self) -> impl Iterator<Item = TileCoords> + '_ {
(self.min_tile.x..self.max_tile.x + 1).flat_map(move |x| {
(self.min_tile.y..self.max_tile.y + 1).map(move |y| {
let tile_coord: TileCoords = (x, y, self.z as u8).into();
tile_coord
})
})
}
}
#[cfg(test)]
mod tests {
use crate::coords::{WorldCoords, WorldTileCoords, EXTENT};
use cgmath::{Vector3, Vector4, Zero};
use crate::coords::{ViewRegion, WorldCoords, WorldTileCoords, EXTENT};
use crate::util::math::Aabb2;
use cgmath::{Point2, Vector3, Vector4, Zero};
const TOP_LEFT: Vector4<f64> = Vector4::new(0.0, 0.0, 0.0, 1.0);
const BOTTOM_RIGHT: Vector4<f64> = Vector4::new(EXTENT, EXTENT, 0.0, 1.0);
@ -277,4 +310,17 @@ mod tests {
to_from_world((67, 42, 7), 7.0);
to_from_world((17421, 11360, 15), 15.0);
}
#[test]
fn test_view_region() {
for tile_coords in ViewRegion::new(
Aabb2::new(Point2::new(0.0, 0.0), Point2::new(2000.0, 2000.0)),
0.0,
0,
)
.iter()
{
println!("{}", tile_coords);
}
}
}