Struct CityStreamer 

pub struct CityStreamer<P>
where
    P: FnMut(i32, i32) -> HeightMap,
{ /* private fields */ }

Streams city tiles on demand.

P produces a heightmap for tile (tile_x, tile_z) whose world coordinates run from 0 to config.tile_size along each axis. Returning a heightmap of any other size is a programmer error; the streamer asserts on world-size mismatch.

Implementations

impl<P> CityStreamer<P>

where P: FnMut(i32, i32) -> HeightMap,

pub fn new(config: CityStreamerConfig, provider: P) -> Self

Creates a new streamer.

Panics

Panics if config.tile_size <= 0.0 or non-finite.

pub fn tile_size(&self) -> f32

Returns the configured tile size.

pub fn cached_tile_count(&self) -> usize

Number of tiles currently cached in memory.

pub fn tile_coord_for(&self, world_pos: Vec2) -> (i32, i32)

Returns the integer tile coordinate that contains world_pos.

pub fn ensure_tile( &mut self, tile_x: i32, tile_z: i32, ) -> Result<&CityTile, GenerationError>

Generates tile (tile_x, tile_z) if not cached and returns a reference to it.

pub fn query_region( &mut self, min: Vec2, max: Vec2, ) -> Result<Vec<&CityTile>, GenerationError>

Ensures every tile overlapping the AABB [min, max] is generated and returns references to all of them in unspecified order.

pub fn evict_outside(&mut self, center: Vec2, max_distance: f32) -> usize

Evicts every cached tile whose center is farther than max_distance from center. Returns the number of tiles evicted.