87 lines
2.5 KiB
Rust
87 lines
2.5 KiB
Rust
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//! Code for controlling the player, and for I/O.
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use pancurses::Window;
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use specs::prelude::*;
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use crate::{
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components::{CharRender, MobAction, Mobile, Player, Position},
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game::DungeonLevel,
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quit,
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};
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/// Runs a player turn on the ECS, using the given `screen` for input
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/// and output.
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///
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/// At some point this should maybe become a system rather than a
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/// standalone function.
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pub fn player_turn(ecs: &mut World, screen: &mut Window) {
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render_screen(ecs, screen);
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let action = loop {
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let key = screen.getch();
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use pancurses::Input;
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let action = match key {
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Some(key) => match key {
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Input::Character(ch) => match ch {
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'.' => Some(MobAction::Nop),
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'h' => Some(MobAction::Move(-1, 0)),
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'j' => Some(MobAction::Move(0, 1)),
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'k' => Some(MobAction::Move(0, -1)),
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'l' => Some(MobAction::Move(1, 0)),
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'y' => Some(MobAction::Move(-1, -1)),
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'u' => Some(MobAction::Move(1, -1)),
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'b' => Some(MobAction::Move(-1, 1)),
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'n' => Some(MobAction::Move(1, 1)),
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'q' => quit(),
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_ => None,
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},
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Input::KeyUp => Some(MobAction::Move(0, -1)),
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Input::KeyLeft => Some(MobAction::Move(-1, 0)),
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Input::KeyDown => Some(MobAction::Move(0, 1)),
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Input::KeyRight => Some(MobAction::Move(1, 0)),
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_ => None,
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},
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// User closed stdin.
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None => quit(),
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};
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if let Some(action) = action {
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break action;
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}
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};
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let plrs = ecs.read_storage::<Player>();
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let mut mobs = ecs.write_storage::<Mobile>();
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for (_plr, mob) in (&plrs, &mut mobs).join() {
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mob.next_action = action;
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}
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}
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/// Renders the state of the world onto the screen.
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fn render_screen(ecs: &mut World, screen: &mut Window) {
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// screen.clear();
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// Draw the base level.
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let level = ecs.fetch::<DungeonLevel>();
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level.draw(screen);
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// Draw all renderable entities.
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let renderables = ecs.read_storage::<CharRender>();
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let positions = ecs.read_storage::<Position>();
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for (render, pos) in (&renderables, &positions).join() {
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screen.mvaddch(pos.y as _, pos.x as _, render.glyph);
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}
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// Leave the cursor at the lower-left.
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screen.mv(0, 0);
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screen.refresh();
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}
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