Struct FogState 

pub struct FogState {
    pub width: u32,
    pub height: u32,
    pub metres_per_pixel: f64,
    pub size_z: f64,
    pub version: u64,
    pub session: u64,
}

Available on crate feature unstable only.

The fog’s size, scale and how often it changed, as one read found it.

Examples

use enshwick::map::FogState;

fn corner(state: FogState) -> Option<[u32; 2]> {
    state.pixel_of([0.0, 0.0, state.size_z - 1.0])
}

Fields

width: u32

The image’s width in pixels.

height: u32

The image’s height in pixels.

metres_per_pixel: f64

The metres one pixel covers along each axis.

size_z: f64

The world’s z size the fog covers, in metres.

version: u64

Grows whenever pixels changed: a mod that compares it reads again only when it moved.

session: u64

Changes with each world the client enters; the copy of a world is gone once the client leaves it.

Implementations

impl FogState

pub fn pixel_of(&self, position: [f64; 3]) -> Option<[u32; 2]>

The pixel that holds position, in metres as World::position gives it; None outside the fog.

Examples

use enshwick::map::FogState;

let state = FogState {
    width: 1280,
    height: 1280,
    metres_per_pixel: 8.0,
    size_z: 10_240.0,
    version: 0,
    session: 1,
};
assert_eq!(state.pixel_of([12.0, 50.0, 10_230.0]), Some([1, 1]));
assert_eq!(state.pixel_of([-1.0, 0.0, 0.0]), None);

Trait Implementations

impl Clone for FogState

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FogState

impl Debug for FogState

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

Formats the value using the given formatter.

impl PartialEq for FogState

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for FogState