Galactica/content/ui/flying.rhai

fn init(state) {

	conf::show_starfield(true);
	conf::show_phys(true);

	sprite::add(
		"ring",
		"ui::status",
		Rect(
			-5.0, -5.0, 100.0, 100.0,
			Anchor::NorthEast,
			Anchor::NorthEast
		)
	);

	radialbar::add(
		"shield", 2.5,
		Color(0.3, 0.6, 0.8, 1.0),
		Rect(
			-9.5, -9.5, 91.0, 91.0,
			Anchor::NorthEast,
			Anchor::NorthEast
		)
	);

	radialbar::add(
		"hull", 2.5,
		Color(0.8, 0.7, 0.5, 1.0),
		Rect(
			-13.5, -13.5, 83.0, 83.0,
			Anchor::NorthEast,
			Anchor::NorthEast
		)
	);





	let radar_size = 150.0;
	let radar_range = 4000.0;
	let hide_range = 0.85;
	let shrink_distance = 20.0;

	sprite::add(
		"radar",
		"ui::radar",
		Rect(
			5.0, -5.0,
			radar_size, radar_size,
			Anchor::NorthWest,
			Anchor::NorthWest
		)
	);

	let init_pos = Rect(
		(radar_size / 2.0 + 5),
		(radar_size / -2.0 - 5),
		3.5, 3.5,
		Anchor::NorthWest,
		Anchor::Center
	);

	sprite::add("radar.frame.ne", "ui::radarframe", init_pos);
	sprite::add("radar.frame.se", "ui::radarframe", init_pos);
	sprite::add("radar.frame.sw", "ui::radarframe", init_pos);
	sprite::add("radar.frame.nw", "ui::radarframe", init_pos);
	sprite::set_angle("radar.frame.se", 90.0);
	sprite::set_angle("radar.frame.sw", 180.0);
	sprite::set_angle("radar.frame.nw", 270.0);
	sprite::set_color("radar.frame.ne", Color(0.3, 0.3, 0.3, 1.0));
	sprite::set_color("radar.frame.se", Color(0.3, 0.3, 0.3, 1.0));
	sprite::set_color("radar.frame.sw", Color(0.3, 0.3, 0.3, 1.0));
	sprite::set_color("radar.frame.nw", Color(0.3, 0.3, 0.3, 1.0));

	sprite::add("radar.arrow", "ui::centerarrow", init_pos);
}

fn event(state, event) {
	if type_of(event) == "PlayerShipStateEvent" {
		if state.player_ship().is_landed() {
			ui::go_to_scene("landed");
			return PlayerDirective::None;
		}
		return PlayerDirective::None;
	}

	if type_of(event) == "ScrollEvent" {
		return ui::set_camera_zoom(
			ui::get_camera_zoom()
			- (5.0 * event.val())
		);
	}

	if type_of(event) == "KeyboardEvent" {
		if event.key() == "up" {
			return PlayerDirective::Engine(event.is_down());
		}
		if event.key() == "left" {
			return PlayerDirective::TurnLeft(event.is_down());
		}
		if event.key() == "right" {
			return PlayerDirective::TurnRight(event.is_down());
		}
		if event.key() == "space" {
			return PlayerDirective::Guns(event.is_down());
		}
		if event.key() == "L" && event.is_down() {
			return PlayerDirective::Land;
		}
		return PlayerDirective::None;
	}
}

fn step(state) {
	if state.player_ship().stat_shield_strength() == 0.0 {
		radialbar::set_val("shield", 0.0);
	} else {
		radialbar::set_val("shield",
			state.player_ship().current_shields()
			/ state.player_ship().stat_shield_strength()
		);
	}

	radialbar::set_val("hull",
		state.player_ship().current_hull()
		/ state.player_ship().total_hull()
	);


	// TODO: share variables with init();
	let p_pos = state.player_ship().get_pos();

	// Radar arrow
	{
		let q = Vector(0.0, 0.0) - state.player_ship().get_pos();
		let m = q.norm();
		let angle = Vector(1.0, 0.0).clockwise_angle(q);
		let position = Vector(5.0 + (radar_size / 2.0), -5.0 - (radar_size / 2.0));
		let rot = Vector(0.915 * (radar_size / 2.0), 0.0);
		let pos = position + rot.rotate(angle);
		sprite::set_rect("radar.arrow",
			Rect(
				pos.x(), pos.y(),
				5.0, 5.0,
				Anchor::NorthWest,
				Anchor::Center
			)
		);
		sprite::set_angle("radar.arrow", angle - 90.0);
		sprite::set_color(
			"radar.arrow",
			Color(
				1.0, 1.0, 1.0,
				clamp((m - 200.0) /400.0, 0.0, 1.0)
			)
		)
	}

	// Ships
	{
		for s in state.ships() {
			let uid = s.phys_uid();
			let sprite_name = `radar.ship.${uid}`;

			if (
				!s.is_some() ||
				s.is_dead() ||
				s.is_landed()
			){
				if sprite::exists(sprite_name) {
					sprite::remove(sprite_name);
				}
				continue;
			}
			
			let color = Color(0.2, 0.2, 0.2, 1.0);
			if s.is_flying() {
				color = s.get_faction_color()
			}
			

			let size_init = s.get_size() * (1.0 / 50.0);
			let pos = s.get_pos();
			let d = (pos - p_pos) / radar_range;
			let m = d.norm() + (size_init / (2.0 * radar_size));
			if m < hide_range {
				let size = (hide_range - m) * size_init * shrink_distance;
				if size > size_init {
					size = size_init;
				}
				if size < 1.0 {
					if sprite::exists(sprite_name) {
						sprite::remove(sprite_name);
					}
					continue;
				}

				let pos = Vector(radar_size / 2.0 + 5.0, radar_size / -2.0 - 5.0);
				pos = pos + (d * radar_size / 2.0);

				if !sprite::exists(sprite_name) {
					sprite::add(
						sprite_name,
						"ui::shipblip",
						Rect(
							pos.x(), pos.y(),
							size, size,
							Anchor::NorthWest,
							Anchor::Center
						)
					);
				} else {
					sprite::set_rect(
						sprite_name,
						Rect(
							pos.x(), pos.y(),
							size, size,
							Anchor::NorthWest,
							Anchor::Center
						)
					);
				}
				sprite::set_color(sprite_name, color);
			}
		}
	}

	// System objects
	{
		for o in state.objects() {
			let l = o.get_index();
			let sprite_name = `radar.object.${l}`;

			if !o.is_some() {
				if sprite::exists(sprite_name) {
					sprite::remove(sprite_name);
				}
				continue;
			}

			let size_init = (o.get_size() / o.get_pos_z()) / (radar_range * (1.0 / 300.0));
			let pos = o.get_pos();
			let d = (pos - p_pos) / radar_range;
			let m = d.norm() + (size_init / (2.0 * radar_size));
			if m < hide_range {
				let size = (hide_range - m) * size_init * shrink_distance;
				if size > size_init {
					size = size_init;
				}
				if size < 1.0 {
					// Don't draw tiny sprites, they flicker
					if sprite::exists(sprite_name) {
						sprite::remove(sprite_name);
					}
					continue;
				}

				let pos = (
					Vector(radar_size / 2.0 + 5.0, radar_size / -2.0 - 5.0)
					+ (d * radar_size / 2.0)
				);

				if !sprite::exists(sprite_name) {
					sprite::add(
						sprite_name,
						"ui::planetblip",
						Rect(
							pos.x(), pos.y(),
							size, size,
							Anchor::NorthWest,
							Anchor::Center
						)
					);
				} else {
					sprite::set_rect(
						sprite_name,
						Rect(
							pos.x(), pos.y(),
							size, size,
							Anchor::NorthWest,
							Anchor::Center
						)
					);
				}
			}
		}
	}

	// Window frame
	{
		let dx = (((ui::get_camera_zoom() / 2.0) * state.window_aspect()) / radar_range) * (radar_size / 2.0);
		let dy = ((ui::get_camera_zoom() / 2.0) / radar_range) * (radar_size / 2.0);
		sprite::set_rect("radar.frame.ne",
			Rect(
				(radar_size / 2.0 + 5) - dx,
				(radar_size / -2.0 - 5) + dy,
				3.5, 3.5,
				Anchor::NorthWest,
				Anchor::Center
			)
		);
		sprite::set_rect("radar.frame.se",
			Rect(
				(radar_size / 2.0 + 5) - dx,
				(radar_size / -2.0 - 5) - dy,
				3.5, 3.5,
				Anchor::NorthWest,
				Anchor::Center
			)
		);
		sprite::set_rect("radar.frame.sw",
			Rect(
				(radar_size / 2.0 + 5) + dx,
				(radar_size / -2.0 - 5) - dy,
				3.5, 3.5,
				Anchor::NorthWest,
				Anchor::Center
			)
		);
		sprite::set_rect("radar.frame.nw",
			Rect(
				(radar_size / 2.0 + 5) + dx,
				(radar_size / -2.0 - 5) + dy,
				3.5, 3.5,
				Anchor::NorthWest,
				Anchor::Center
			)
		);
	}
}