Struct TemperatureXzCache 

pub struct TemperatureXzCache {
    block_x: i32,
    block_z: i32,
    frozen_large_x7: f64,
    frozen_edge: f64,
    frozen_small: f64,
    height_temp_noise_x8: f64,
}

Lazy XZ-only noise cache for SurfaceSystem::get_temperature.

All three noise samples used by get_temperature (frozen large/edge/small, height-based temperature) are 2D — they only depend on (block_x, block_z). The build_surface column scan calls cold_enough_to_snow once per Y, so reusing these noise values across the whole column saves one sample per rare-modifier hit and one per height-adjusted block.

NAN is the “not yet computed” sentinel: the noise functions only ever return finite values, so any non-NaN read is a valid cached value. This keeps the struct 16 bytes smaller than the equivalent Option<f64> layout (no niche for f64).

Fields

block_x: i32

block_z: i32

frozen_large_x7: f64

frozen_edge: f64

frozen_small: f64

height_temp_noise_x8: f64

Implementations

impl TemperatureXzCache

pub const fn new(block_x: i32, block_z: i32) -> Self

Create a fresh (empty) cache for a column at (block_x, block_z).