Merge branch 'main' into shader

src/activities/house/mod.rs

@@ -3,7 +3,7 @@ mod grid;
 mod player;
 mod room;
 
-use comfy::{random_i32, EngineContext};
+use comfy::{main_camera_mut, random_i32, vec2, EngineContext, RandomRange as _};
 use grid::Grid;
 use log::error;
 use player::Player;
@@ -18,7 +18,12 @@ pub struct HouseState {
 	rooms: Vec<Room>,
 	//grid: Grid,
 	player: Player,
-	human_layer: bool //Human, magnetic, electric
+	human_layer: bool, //Human, magnetic, electric
+
+	/// The energy level remaining in the house. Should decrease by itself, and much
+	/// faster when inhabited by the ghost.
+	pub charge: f32,
+	pub max_charge: f32
 }
 
 impl HouseState {
@@ -31,12 +36,16 @@ impl HouseState {
 		}
 
 		let player = Player::new(rooms.first().unwrap());
+		let max_charge = f32::gen_range(2_000.0, 5_000.0);
 		HouseState {
 			current_room_id: 0,
 			room_count,
 			rooms,
 			player,
-			human_layer: false
+			human_layer: false,
+			// TODO this should be lower depending on the time elapsed
+			charge: max_charge,
+			max_charge
 		}
 	}
 }
@@ -63,6 +72,9 @@ pub fn draw(state: &crate::State, _ctx: &mut comfy::EngineContext<'_>) {
 }
 
 pub fn update(state: &mut crate::State, ctx: &mut comfy::EngineContext<'_>) {
+	let mut camera = main_camera_mut();
+	camera.center = vec2(0.0, 0.0);
+
 	let house = state.house_mut(ctx);
 	let current_room = house.rooms.get(house.current_room_id).unwrap();
 	house.player.update(&current_room.grid);

src/activities/overworld/mod.rs

@@ -1,6 +1,10 @@
-use crate::{activities::Activity, game::ZLayer, State};
+use crate::{
+	activities::Activity,
+	game::{ZLayer, GHOST_DISCHARGE_RATE, GHOST_DISCHARGE_RATE_MOVEMENT},
+	State
+};
 use comfy::{
-	draw_circle, draw_rect_outline, draw_sprite, error, info, is_key_down,
+	delta, draw_circle, draw_rect_outline, draw_sprite, error, info, is_key_down,
 	main_camera_mut, EngineContext, IVec2, KeyCode, Vec2, RED, WHITE
 };
 use std::time::Instant;
@@ -27,7 +31,7 @@ pub fn draw(state: &crate::State, _engine: &comfy::EngineContext<'_>) {
 	draw_circle(state.ghost.overworld_pos, 0.5, RED, ZLayer::Ghost.into());
 }
 
-fn update_move_player(state: &mut State, ctx: &mut EngineContext<'_>) {
+fn update_move_player(state: &mut State, _ctx: &mut EngineContext<'_>) {
 	let now = Instant::now();
 
 	// Are there any pending position updates? If so, we ignore all user input and execute
@@ -174,6 +178,15 @@ pub fn update(state: &mut State, ctx: &mut EngineContext<'_>) {
 		}
 	}
 
+	// energie lost
+	{
+		let ghost = &mut state.ghost;
+		ghost.charge -= GHOST_DISCHARGE_RATE * ctx.delta;
+		if ghost.overworld_movement_pending != Vec2::ZERO {
+			ghost.charge -= GHOST_DISCHARGE_RATE_MOVEMENT * ctx.delta;
+		}
+	}
+
 	// generate more chunks if needed
 	{
 		let half_viewport = (camera.world_viewport() * 0.5 + 3.0).as_ivec2();

src/game.rs

@@ -4,7 +4,10 @@ use crate::{
 	State
 };
 use comfy::{EngineContext, Vec2};
-use std::{ops::Sub, time::Instant};
+use std::{
+	ops::{Add, Sub},
+	time::Instant
+};
 
 #[derive(Debug)]
 pub struct Ghost {
@@ -71,7 +74,8 @@ pub enum ZLayer {
 	ElectricLayer = -2,
 	MapMax = -1,
 	Human = 0,
-	Ghost = 1
+	Ghost = 1,
+	UI = 100
 }
 
 impl From<ZLayer> for i32 {
@@ -89,18 +93,68 @@ impl Sub<i32> for ZLayer {
 	}
 }
 
-pub fn setup(state: &mut State, ctx: &mut EngineContext<'_>) {
+impl Add<i32> for ZLayer {
+	type Output = i32;
+
+	fn add(self, other: i32) -> Self::Output {
+		i32::from(self) + other
+	}
+}
+
+pub fn setup(_state: &mut State, ctx: &mut EngineContext<'_>) {
 	Assets::load(ctx);
 
 	//house::setup(state, ctx);
 }
 
-pub fn update(state: &mut State, engine: &mut EngineContext<'_>) {
-	state.score += engine.delta * 10.0;
+/// The amount of energy a ghost consumes idle.
+pub const GHOST_DISCHARGE_RATE: f32 = 70.0;
+/// The amount of energy additionally consumed by a moving ghost.
+pub const GHOST_DISCHARGE_RATE_MOVEMENT: f32 = 70.0;
+/// The amount of energy a house consumes idle.
+pub const HOUSE_DISCHARGE_RATE: f32 = 30.0;
+/// The amount of energy a ghost can charge when inside a house.
+pub const GHOST_CHARGE_RATE: f32 = 200.0;
+
+pub fn update(state: &mut State, ctx: &mut EngineContext<'_>) {
+	// Update the score. It's based on time.
+	state.score += ctx.delta * 10.0;
+
+	// Update the currently active activity.
 	match state.activity {
-		Activity::House(_) => house::update(state, engine),
-		Activity::Overworld => overworld::update(state, engine)
+		Activity::House(_) => house::update(state, ctx),
+		Activity::Overworld => overworld::update(state, ctx)
 	}
+
+	// We update the charge of houses here - the charge will always decrease, even if the
+	// house is not the current activity.
+	for (house_pos, house) in &mut state.houses {
+		house.charge -= ctx.delta * HOUSE_DISCHARGE_RATE;
+
+		match state.activity {
+			Activity::House(pos) if *house_pos == pos => {
+				// The ghost is currently inside the house. Increase its discarge rate.
+				house.charge -= ctx.delta * GHOST_DISCHARGE_RATE;
+				if house.charge < 0.0 {
+					state.ghost.charge += house.charge;
+					house.charge = 0.0;
+				}
+
+				// And possibly also charge the ghost when inside a house.
+				if state.ghost.charge < state.ghost.max_charge {
+					let charge_transfer = (ctx.delta * GHOST_CHARGE_RATE)
+						.min(state.ghost.max_charge - state.ghost.charge)
+						.min(house.charge);
+					state.ghost.charge += charge_transfer;
+					house.charge -= charge_transfer;
+				}
+			},
+			_ => {}
+		}
+	}
+
+	// Make sure the ghost's charge never drops below 0.
+	state.ghost.charge = state.ghost.charge.max(0.0);
 }
 
 pub fn draw(state: &State, engine: &mut EngineContext<'_>) {

src/ui.rs

@@ -1,37 +1,61 @@
-use crate::State;
+use crate::{game::ZLayer, State};
 use comfy::{
 	draw_rect, draw_rect_outline, egui, screen_height, screen_to_world, screen_width,
-	EngineContext, Vec2, BLUE, RED, WHITE
+	vec2, Color, EngineContext, Vec2, BLACK, BLUE, PURPLE, RED, WHITE
 };
 use egui::widget_text::RichText;
 
-pub fn draw_batterie(state: &State, _engine: &EngineContext<'_>) {
 // seperate fill state into smaller section for better readability
-	let section_count = 5;
-	let mut start_positon = screen_to_world(Vec2::new(screen_width(), screen_height()));
+const BATTERY_SECTION_COUNT: u8 = 5;
+const BATTERY_SECTION_WIDTH: f32 = 1.0;
+const BATTERY_SECTION_HEIGHT: f32 = 0.5;
+
+fn draw_battery(mut start_position: Vec2, charge: f32, max_charge: f32, color: Color) {
 	// section size in world codinates
-	let section_size = Vec2::new(0.5, 0.25);
-	start_positon.x -= 0.5 * section_size.x + 0.5 * section_size.y;
-	start_positon.y += 0.5 * section_size.y + 0.5 * section_size.y;
+	let section_size = vec2(BATTERY_SECTION_WIDTH, BATTERY_SECTION_HEIGHT);
+	start_position.x -= 0.5 * section_size.x + 0.5 * section_size.y;
+	start_position.y += 0.5 * section_size.y + 0.5 * section_size.y;
 	// draw fill level
 	{
-		let ghost = &state.ghost;
-		let percent = ghost.charge / ghost.max_charge;
+		let percent = charge / max_charge;
 		let mut size = section_size;
-		size.y = section_size.y * section_count as f32 * percent;
-		let mut position = start_positon;
+		size.y = section_size.y * BATTERY_SECTION_COUNT as f32;
+		let mut position = start_position;
 		position.y += 0.5 * -section_size.y + 0.5 * size.y;
-		draw_rect(position, size, BLUE, 100);
+		draw_rect(position, size, BLACK, ZLayer::UI.into());
+		size.y *= percent;
+		let mut position = start_position;
+		position.y += 0.5 * -section_size.y + 0.5 * size.y;
+		draw_rect(position, size, BLUE, ZLayer::UI + 1);
 	}
 	// draw sections
-	for i in 0 .. section_count {
-		let mut position = start_positon;
+	for i in 0 .. BATTERY_SECTION_COUNT {
+		let mut position = start_position;
 		position.y += i as f32 * section_size.y;
-		draw_rect_outline(position, section_size, 0.1, RED, 100);
+		draw_rect_outline(position, section_size, 0.1, color, ZLayer::UI + 2);
 	}
 }
 
-pub fn draw_highscore(state: &State, _engine: &EngineContext<'_>) {
+pub fn draw_ghost_battery(state: &State) {
+	let start_position = screen_to_world(Vec2::new(screen_width(), screen_height()));
+	draw_battery(
+		start_position,
+		state.ghost.charge,
+		state.ghost.max_charge,
+		RED
+	);
+}
+
+pub fn draw_house_battery(state: &State) {
+	let Some(house) = state.house() else {
+		return;
+	};
+	let mut start_position = screen_to_world(Vec2::new(screen_width(), screen_height()));
+	start_position.x -= 2.0 * BATTERY_SECTION_WIDTH;
+	draw_battery(start_position, house.charge, house.max_charge, PURPLE)
+}
+
+pub fn draw_highscore(state: &State) {
 	egui::Area::new("score")
 		.anchor(egui::Align2::RIGHT_TOP, egui::vec2(0.0, 0.0))
 		.show(egui(), |ui| {
@@ -45,7 +69,8 @@ pub fn draw_highscore(state: &State, _engine: &EngineContext<'_>) {
 		});
 }
 
-pub fn draw(state: &State, engine: &EngineContext<'_>) {
-	draw_batterie(state, engine);
-	draw_highscore(state, engine);
+pub fn draw(state: &State, _ctx: &EngineContext<'_>) {
+	draw_ghost_battery(state);
+	draw_house_battery(state);
+	draw_highscore(state);
 }