nightshade-api 0.56.0

Procedural high level API for the nightshade game engine
Documentation 
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//! Procedural terrain and grass. Walk a GPU clipmap world that tiles around the
//! camera with a grass field over it, toggling each on keys. Run with the
//! `terrain` feature: `just run-example terrain_walk` after enabling it, or
//! `cargo run -r -p nightshade-api --example terrain_walk --features terrain`.

use nightshade_api::prelude::*;

struct World3d {
    hint: Entity,
    terrain_on: bool,
    grass_on: bool,
    snow: f32,
}

fn main() {
    run(setup, update).unwrap();
}

fn setup(world: &mut World) -> World3d {
    set_window_title(world, "Terrain Walk");
    set_background(world, Background::Sky);
    show_grid(world, false);
    set_bloom(world, true);

    enable_terrain(world, 1337);
    set_terrain_height_range(world, 0.0, 40.0);
    set_terrain_snow_height(world, 26.0);
    enable_grass(world);

    first_person(world, vec3(0.0, 6.0, 0.0));

    let hint = spawn_text(
        world,
        "WASD walk   T terrain   G grass   [ ] snow line",
        ScreenAnchor::BottomLeft,
    );

    World3d {
        hint,
        terrain_on: true,
        grass_on: true,
        snow: 26.0,
    }
}

fn update(world: &mut World, state: &mut World3d) {
    if key_pressed(world, KeyCode::KeyT) {
        state.terrain_on = !state.terrain_on;
        if state.terrain_on {
            enable_terrain(world, 1337);
        } else {
            disable_terrain(world);
        }
    }
    if key_pressed(world, KeyCode::KeyG) {
        state.grass_on = !state.grass_on;
        if state.grass_on {
            enable_grass(world);
        } else {
            disable_grass(world);
        }
    }
    if key_pressed(world, KeyCode::BracketLeft) {
        state.snow = (state.snow - 2.0).max(0.0);
        set_terrain_snow_height(world, state.snow);
    }
    if key_pressed(world, KeyCode::BracketRight) {
        state.snow = (state.snow + 2.0).min(40.0);
        set_terrain_snow_height(world, state.snow);
    }
    set_text(
        world,
        state.hint,
        &format!(
            "terrain {}   grass {}   snow {:.0}",
            state.terrain_on, state.grass_on, state.snow
        ),
    );
}