Fix lint issues

src/main/index.ts

@@ -5,11 +5,12 @@ import { format as formatUrl } from 'url';
 const isDevelopment = process.env.NODE_ENV !== 'production';
 
 // global reference to mainWindow (necessary to prevent window from being garbage collected)
-let mainWindow: BrowserWindow|null = null;
+let mainWindow: BrowserWindow | null = null;
 
 function getIndexURL(): string {
-	if (isDevelopment)
+	if (isDevelopment) {
 		return `http://localhost:${process.env.ELECTRON_WEBPACK_WDS_PORT}`;
+	}
 
 	return formatUrl({
 		pathname: path.join(__dirname, 'index.html'),
@@ -19,10 +20,11 @@ function getIndexURL(): string {
 }
 
 function createMainWindow(): BrowserWindow {
-	const window = new BrowserWindow({webPreferences: {nodeIntegration: true}});
+	const window = new BrowserWindow({ webPreferences: { nodeIntegration: true } });
 
-	if (isDevelopment)
+	if (isDevelopment) {
 		window.webContents.openDevTools();
+	}
 
 	window.loadURL(getIndexURL());
 
@@ -32,7 +34,7 @@ function createMainWindow(): BrowserWindow {
 
 	window.webContents.on('devtools-opened', () => {
 		window.webContents.focus();
-	})
+	});
 
 	return window;
 }
@@ -40,14 +42,16 @@ function createMainWindow(): BrowserWindow {
 // quit application when all windows are closed
 app.on('window-all-closed', () => {
 	// on macOS it is common for applications to stay open until the user explicitly quits
-	if (process.platform !== 'darwin')
+	if (process.platform !== 'darwin') {
 		app.quit();
+	}
 });
 
 app.on('activate', () => {
 	// on macOS it is common to re-create a window even after all windows have been closed
-	if (!mainWindow)
+	if (!mainWindow) {
 		mainWindow = createMainWindow();
+	}
 });
 
 // create main BrowserWindow when electron is ready

src/renderer/custom.d.ts

@@ -1,9 +1,9 @@
-declare module "*.vs" {
+declare module '*.vs' {
 	const content: string;
 	export default content;
 }
 
-declare module "*.fs" {
+declare module '*.fs' {
 	const content: string;
 	export default content;
 }

src/renderer/index.ts

@@ -4,15 +4,14 @@ import { GameContext } from './runtime/controller/gamecontext';
 
 import { Renderer } from './runtime/view/renderer/renderer';
 
-window.onload = async () => {
+window.onload = async (): Promise<void> => {
 	const app = document.getElementById('app');
-	if (!app)
+	if (!app) return;
-		return;
 
 	const canvas = document.createElement('canvas');
 	const renderer = new Renderer(canvas);
 
-	const resize = () => {
+	const resize = (): void => {
 		canvas.width = window.innerWidth;
 		canvas.height = window.innerHeight;
 		renderer.resize();

src/renderer/runtime/controller/collision.ts

@@ -13,8 +13,7 @@ export function mkCollision(collision: Collision[]): Collidable[] {
 	for (const c of collision) {
 		switch (c.type) {
 			case 'polygon':
-			if (!c.vertices.length)
+				if (!c.vertices.length) continue;
-				continue;
 
 				let prev = c.vertices[c.vertices.length - 1];
 
@@ -39,24 +38,20 @@ export function mkCollision(collision: Collision[]): Collidable[] {
 }
 
 export interface CollidableGroup {
-	getTranslation(): vec2|null;
+	getTranslation(): vec2 | null;
 	getCollidables(): Collidable[];
 }
 
 export function collide(collision: CollidableGroup, out: vec2, move: Movement, radius: number): boolean {
 	const t = collision.getTranslation();
-	if (t)
+	if (t) move = move.translate(vec2.negate(vec2.create(), t));
-		move = move.translate(vec2.negate(vec2.create(), t));
 
 	for (const c of collision.getCollidables()) {
-		if (!c.collide(out, move, radius))
+		if (!c.collide(out, move, radius)) continue;
-			continue;
 
-		if (vec2.squaredDistance(move.src, out) >= vec2.squaredDistance(move.src, move.dest))
+		if (vec2.squaredDistance(move.src, out) >= vec2.squaredDistance(move.src, move.dest)) continue;
-			continue;
 
-		if (t)
+		if (t) vec2.add(out, out, t);
-			vec2.add(out, out, t);
 
 		return true;
 	}

src/renderer/runtime/controller/entitycontext.ts

@@ -9,11 +9,7 @@ import { vec2 } from 'gl-matrix';
 
 export class EntityContext implements CollidableGroup {
 	public static async load(renderer: Renderer, name: string): Promise<EntityContext> {
-		return new EntityContext(
+		return new EntityContext(renderer, name, await EntityView.load(renderer, name));
-			renderer,
-			name,
-			await EntityView.load(renderer, name),
-		);
 	}
 
 	public readonly pos: vec2 = vec2.create();
@@ -28,7 +24,7 @@ export class EntityContext implements CollidableGroup {
 		this.collision = mkCollision(view.data.collision);
 	}
 
-	public render(time: number) {
+	public render(time: number): void {
 		this.renderer.setTranslation(this.pos);
 		this.view.renderByTime(time);
 	}
@@ -41,7 +37,7 @@ export class EntityContext implements CollidableGroup {
 		return this.collision;
 	}
 
-	public interact() {
+	public interact(): void {
 		alert(`You've interacted with ${this.name}!`);
 	}
 }

src/renderer/runtime/controller/gamecontext.ts

@@ -1,7 +1,7 @@
 import { CollidableGroup, collide, mkCollision } from './collision';
 import { EntityContext } from './entitycontext';
 
-import { MapData } from '../model/data/map';
+import { MapData, MapDataInput } from '../model/data/map';
 
 import { ButtonCode, GameInputHandler } from '../view/input/gameinput';
 import { MapView } from '../view/map';
@@ -26,17 +26,11 @@ export class GameContext implements CollidableGroup {
 		vec2.set(player.pos, 7, 6);
 		vec2.set(entity.pos, 4, 3);
 
-		return new GameContext(
+		return new GameContext(renderer, mapView, player, [entity], mapCollision);
-			renderer,
-			mapView,
-			player,
-			[entity],
-			mapCollision,
-		);
 	}
 
 	private static async loadMap(renderer: Renderer, name: string): Promise<[MapView, Collidable[]]> {
-		const map = new MapData(await getJSON(`resources/map/${name}.json`));
+		const map = new MapData((await getJSON(`resources/map/${name}.json`)) as MapDataInput);
 		return [await MapView.load(renderer, map), mkCollision(map.collision)];
 	}
 
@@ -50,7 +44,7 @@ export class GameContext implements CollidableGroup {
 	private readonly input: GameInputHandler;
 
 	private readonly playerDir: vec2 = vec2.fromValues(0, 1);
-	private speed: number = 0;
+	private speed = 0;
 
 	private readonly collisionRadius = 15 / 32;
 	private readonly interactLength = 1 / 32;
@@ -66,8 +60,7 @@ export class GameContext implements CollidableGroup {
 		this.input.addListener((input) => {
 			switch (input.type) {
 				case 'button':
-				if (input.button === ButtonCode.Action)
+					if (input.button === ButtonCode.Action) this.interact();
-					this.interact();
 					break;
 
 				case 'direction':
@@ -108,8 +101,7 @@ export class GameContext implements CollidableGroup {
 
 	private interact(): void {
 		for (const e of this.entities) {
-			if (!this.canInteract(e))
+			if (!this.canInteract(e)) continue;
-				continue;
 
 			e.interact();
 			break;
@@ -136,8 +128,7 @@ export class GameContext implements CollidableGroup {
 		const newDest = vec2.create();
 
 		while (this.updateStepCollide(newDest, dest)) {
-			if (vec2.equals(newDest, this.player.pos))
+			if (vec2.equals(newDest, this.player.pos)) return;
-				return;
 
 			vec2.copy(dest, newDest);
 		}
@@ -153,21 +144,19 @@ export class GameContext implements CollidableGroup {
 			return;
 		}
 
-		for (let i = 0; i < diff; i++)
+		for (let i = 0; i < diff; i++) this.updateStep();
-			this.updateStep();
 	}
 
 	private render(): void {
 		this.renderer.setCenter(this.player.pos);
 		this.renderer.clear();
 
-		for (const r of [this.mapView, ...this.entities, this.player])
+		for (const r of [this.mapView, ...this.entities, this.player]) r.render(this.time);
-			r.render(this.time);
 	}
 
 	private async renderLoop(): Promise<void> {
 		while (true) {
-			this.update(await nextAnimationFrame() - this.initTime);
+			this.update((await nextAnimationFrame()) - this.initTime);
 			this.render();
 		}
 	}

src/renderer/runtime/math/line.ts

@@ -1,10 +1,7 @@
 import { mat2, vec2 } from 'gl-matrix';
 import { Collidable } from './collision';
 
-const rot90 = mat2.fromValues(
+const rot90 = mat2.fromValues(0, 1, -1, 0);
-	0, 1,
-	-1, 0,
-);
 
 export function normal(out: vec2, a: vec2): vec2 {
 	return vec2.transformMat2(out, a, rot90);
@@ -15,10 +12,7 @@ export function crossz(a: vec2, b: vec2): number {
 }
 
 export class Line {
-	constructor(
+	constructor(public readonly p: vec2, public readonly v: vec2) {}
-		public readonly p: vec2,
-		public readonly v: vec2,
-	) {}
 
 	public getNormal(out: vec2): vec2 {
 		return normal(out, this.v);
@@ -50,10 +44,7 @@ export class Line {
 export class Movement {
 	public readonly v: vec2;
 
-	constructor(
+	constructor(public readonly src: vec2, public readonly dest: vec2) {
-		public readonly src: vec2,
-		public readonly dest: vec2,
-	) {
 		this.v = vec2.sub(vec2.create(), dest, src);
 	}
 
@@ -71,6 +62,7 @@ export class Movement {
 	}
 
 	public toLineSegment(): LineSegment {
+		// eslint-disable-next-line @typescript-eslint/no-use-before-define
 		return LineSegment.fromPoints(this.src, this.dest);
 	}
 
@@ -90,11 +82,7 @@ export class LineSegment extends Line implements Collidable {
 		return new LineSegment(p1, v, d);
 	}
 
-	constructor(
+	constructor(p: vec2, v: vec2, public readonly l: number) {
-		p: vec2,
-		v: vec2,
-		public readonly l: number,
-	) {
 		super(p, v);
 	}
 
@@ -104,35 +92,30 @@ export class LineSegment extends Line implements Collidable {
 
 	public containsPoint(p2: vec2): boolean {
 		const d = this.projectPointDistance(p2);
-		return (d >= 0 && d <= this.l);
+		return d >= 0 && d <= this.l;
 	}
 
 	public collide(out: vec2, move: Movement, r: number): boolean {
-		if (this.distancePoint(move.src) < 0)
+		if (this.distancePoint(move.src) < 0) return false;
-			return false;
 
-		if (crossz(move.v, this.v) < 0)
+		if (crossz(move.v, this.v) < 0) return false;
-			return false;
 
 		const t = this.getNormal(vec2.create());
 		vec2.scale(t, t, -r);
 
 		const refMove = move.translate(t);
 
-		if (!this.collideRef(out, refMove))
+		if (!this.collideRef(out, refMove)) return false;
-			return false;
 
 		vec2.sub(out, out, t);
 		return true;
 	}
 
 	private collideRef(out: vec2, move: Movement): boolean {
-		if (this.distancePoint(move.dest) >= 0)
+		if (this.distancePoint(move.dest) >= 0) return false;
-			return false;
 
 		const x = move.intersectLine(vec2.create(), this);
-		if (!this.containsPoint(x))
+		if (!this.containsPoint(x)) return false;
-			return false;
 
 		this.projectPoint(out, move.dest);
 

src/renderer/runtime/math/point.ts

@@ -9,12 +9,10 @@ export class Point implements Collidable {
 	public collide(out: vec2, move: Movement, r: number): boolean {
 		const moveLine = move.toLineSegment();
 
-		if (moveLine.projectPointDistance(this.p) < 0)
+		if (moveLine.projectPointDistance(this.p) < 0) return false;
-			return false;
 
 		const d = moveLine.distancePoint(this.p) / r;
-		if (Math.abs(d) >= 1)
+		if (Math.abs(d) >= 1) return false;
-			return false;
 
 		const e = Math.sqrt(1 - d * d);
 
@@ -26,8 +24,7 @@ export class Point implements Collidable {
 
 		const refMove = move.translate(tr);
 
-		if (vec2.sqrDist(this.p, move.src) > r * r && !refMove.passes(this.p))
+		if (vec2.sqrDist(this.p, move.src) > r * r && !refMove.passes(this.p)) return false;
-			return false;
 
 		normal(t, t);
 

src/renderer/runtime/util.ts

@@ -1,8 +1,7 @@
 export function recordToMap<T>(r: Record<string, T>): Map<string, T> {
 	const ret = new Map();
 
-	for (const k of Object.keys(r))
+	for (const k of Object.keys(r)) ret.set(k, r[k]);
-		ret.set(k, r[k]);
 
 	return ret;
 }
@@ -10,8 +9,7 @@ export function recordToMap<T>(r: Record<string, T>): Map<string, T> {
 export function mapValues<K, V1, V2>(f: (v: V1) => V2, map: Map<K, V1>): Map<K, V2> {
 	const ret: Map<K, V2> = new Map();
 
-	for (const [k, v] of map)
+	for (const [k, v] of map) ret.set(k, f(v));
-		ret.set(k, f(v));
 
 	return ret;
 }
@@ -19,8 +17,7 @@ export function mapValues<K, V1, V2>(f: (v: V1) => V2, map: Map<K, V1>): Map<K,
 export async function mapValuesAsync<K, V1, V2>(f: (v: V1) => Promise<V2>, map: Map<K, V1>): Promise<Map<K, V2>> {
 	const ret: Map<K, V2> = new Map();
 
-	for (const [k, v] of mapValues(f, map))
+	for (const [k, v] of mapValues(f, map)) ret.set(k, await v);
-		ret.set(k, await v);
 
 	return ret;
 }
@@ -28,12 +25,12 @@ export async function mapValuesAsync<K, V1, V2>(f: (v: V1) => Promise<V2>, map:
 export function nextPowerOf2(n: number): number {
 	let i = 1;
 
-	while (i < n)
+	while (i < n) i *= 2;
-		i *= 2;
 
 	return i;
 }
 
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
 export class Listenable<T extends any[]> {
 	private readonly listeners: Array<(...args: T) => void> = [];
 
@@ -46,10 +43,9 @@ export class Listenable<T extends any[]> {
 	}
 }
 
-export async function getJSON(url: string): Promise<any> {
+export async function getJSON(url: string): Promise<unknown> {
 	const res = await window.fetch(url);
-	if (res.status < 200 || res.status >= 300)
+	if (res.status < 200 || res.status >= 300) throw new Error(res.statusText);
-		throw new Error(res.statusText);
 
 	return await res.json();
 }

src/renderer/runtime/view/entity.ts

@@ -1,4 +1,4 @@
-import { EntityData } from '../model/data/entity';
+import { EntityData, EntityDataInput } from '../model/data/entity';
 import { Renderer } from './renderer/renderer';
 import { SpriteCoords, SpriteView, SpriteViewBuilder } from './sprite';
 import { loadImage, mkTexture } from './util/image';
@@ -9,7 +9,7 @@ import { vec2 } from 'gl-matrix';
 
 export class EntityView {
 	public static async load(r: Renderer, name: string): Promise<EntityView> {
-		const data = new EntityData(await getJSON(`resources/entity/${name}.json`));
+		const data = new EntityData((await getJSON(`resources/entity/${name}.json`)) as EntityDataInput);
 		const tile = await loadImage(`resources/sprite/entity/${data.sprite}.png`);
 
 		const [texture, size] = mkTexture(r, tile);
@@ -33,22 +33,14 @@ export class EntityView {
 			sprites.push(builder.build());
 		}
 
-		return new EntityView(
+		return new EntityView(data, sprites);
-			data,
-			sprites,
-		);
 	}
 
 	private readonly totalTime: number;
 
-	private constructor(
+	private constructor(public readonly data: EntityData, public readonly sprites: SpriteView[]) {
-		public readonly data: EntityData,
+		if (data.animation) this.totalTime = data.animation.sequence.reduce((a, s) => a + s[0], 0);
-		public readonly sprites: SpriteView[],
+		else this.totalTime = 0;
-	) {
-		if (data.animation)
-			this.totalTime = data.animation.sequence.reduce((a, s) => a + s[0], 0);
-		else
-			this.totalTime = 0;
 	}
 
 	public getSpriteByTime(time: number): SpriteView {
@@ -57,16 +49,14 @@ export class EntityView {
 		if (this.data.animation) {
 			for (const [len, sprite] of this.data.animation.sequence) {
 				time -= len;
-				if (time < 0)
+				if (time < 0) return this.sprites[sprite];
-					return this.sprites[sprite];
 			}
 		}
 
 		return this.sprites[0];
 	}
 
-	public renderByTime(time: number) {
+	public renderByTime(time: number): void {
 		this.getSpriteByTime(time).render();
 	}
-
 }

src/renderer/runtime/view/input/gameinput.ts

@@ -35,13 +35,8 @@ export class GameInputHandler extends Listenable<[GameInput]> {
 		super();
 
 		this.input = new InputHandler(
-			new Set([
+			new Set(['ArrowLeft', 'ArrowUp', 'ArrowRight', 'ArrowDown', ...Object.keys(buttonMapping)]),
-				'ArrowLeft',
+		);
-				'ArrowUp',
-				'ArrowRight',
-				'ArrowDown',
-				...Object.keys(buttonMapping),
-			]));
 
 		this.input.addListener((key: string, pressed: boolean) => {
 			const button = buttonMapping[key];
@@ -57,17 +52,12 @@ export class GameInputHandler extends Listenable<[GameInput]> {
 
 			const dir = vec2.create();
 
-			if (this.input.has('ArrowLeft'))
+			if (this.input.has('ArrowLeft')) vec2.add(dir, dir, [-1, 0]);
-				vec2.add(dir, dir, [-1, 0]);
+			if (this.input.has('ArrowUp')) vec2.add(dir, dir, [0, -1]);
-			if (this.input.has('ArrowUp'))
+			if (this.input.has('ArrowRight')) vec2.add(dir, dir, [1, 0]);
-				vec2.add(dir, dir, [0, -1]);
+			if (this.input.has('ArrowDown')) vec2.add(dir, dir, [0, 1]);
-			if (this.input.has('ArrowRight'))
-				vec2.add(dir, dir, [1, 0]);
-			if (this.input.has('ArrowDown'))
-				vec2.add(dir, dir, [0, 1]);
 
-			if (vec2.sqrLen(dir) > 0)
+			if (vec2.sqrLen(dir) > 0) vec2.normalize(dir, dir);
-				vec2.normalize(dir, dir);
 
 			this.runListeners({
 				type: 'direction',

src/renderer/runtime/view/input/inputhandler.ts

@@ -7,26 +7,22 @@ export class InputHandler extends Listenable<[string, boolean]> {
 		super();
 
 		window.addEventListener('keydown', (ev) => {
-			if (!relevantKeys.has(ev.code))
+			if (!relevantKeys.has(ev.code)) return;
-				return;
 
 			ev.preventDefault();
 
-			if (ev.repeat)
+			if (ev.repeat) return;
-				return;
 
 			this.keys.add(ev.code);
 			this.runListeners(ev.code, true);
 		});
 
 		window.addEventListener('keyup', (ev) => {
-			if (!relevantKeys.has(ev.code))
+			if (!relevantKeys.has(ev.code)) return;
-				return;
 
 			ev.preventDefault();
 
-			if (!this.keys.has(ev.code))
+			if (!this.keys.has(ev.code)) return;
-				return;
 
 			this.keys.delete(ev.code);
 			this.runListeners(ev.code, false);

src/renderer/runtime/view/map.ts

@@ -55,10 +55,7 @@ function loadTiles(r: Renderer, tiles: string[]): Promise<MapTile[]> {
 	return Promise.all(tiles.map((tile) => loadTile(r, tile)));
 }
 
-function mkTileset(
+function mkTileset(r: Renderer, mapTiles: MapTile[]): Tileset {
-	r: Renderer,
-	mapTiles: MapTile[],
-): Tileset {
 	const tileSize = 32;
 
 	const canvasDim = nextPowerOf2(Math.sqrt(mapTiles.length));
@@ -67,7 +64,8 @@ function mkTileset(
 	const canvas = document.createElement('canvas');
 	canvas.width = canvas.height = canvasSize;
 
-	let x = 0, y = 0;
+	let x = 0;
+	let y = 0;
 	const tiles: TilesetTile[] = [];
 	const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
 
@@ -77,7 +75,12 @@ function mkTileset(
 				ctx.drawImage(tile.image, x * tileSize, y * tileSize);
 				tiles.push({
 					type: 'static',
-				coords: [x / canvasDim, y / canvasDim, (x + 1) / canvasDim, (y + 1) / canvasDim],
+					coords: [
+						x / canvasDim,
+						y / canvasDim,
+						(x + 1) / canvasDim,
+						(y + 1) / canvasDim,
+					],
 				});
 
 				x++;
@@ -107,9 +110,9 @@ function addSprite(
 	tileset: Tileset,
 	x: number,
 	y: number,
-	tile: number) {
+	tile: number,
-	if (!tile)
+): void {
-		return;
+	if (!tile) return;
 
 	const tilesetTile = tileset.tiles[tile - 1];
 
@@ -124,24 +127,12 @@ function addSprite(
 	}
 }
 
-function buildMapLayer(r: Renderer, tileset: Tileset, layer: number[][]): MapLayerView {
-	const builder = new SpriteViewBuilder(r, tileset.texture);
-	const entityTiles: Array<[[number, number], EntityView]> = [];
-
-	for (let x = 0; x < layer[0].length; x++)
-		for (let y = 0; y < layer.length; y++)
-			addSprite(builder, entityTiles, tileset, x, y, layer[y][x]);
-
-	return new MapLayerView(r, builder.build(), entityTiles);
-}
-
 class MapLayerView {
 	public constructor(
 		private r: Renderer,
 		private staticTiles: SpriteView,
 		private entityTiles: Array<[[number, number], EntityView]>,
-	) {
+	) {}
-	}
 
 	public render(time: number): void {
 		this.r.setTranslation([0, 0]);
@@ -154,6 +145,16 @@ class MapLayerView {
 	}
 }
 
+function buildMapLayer(r: Renderer, tileset: Tileset, layer: number[][]): MapLayerView {
+	const builder = new SpriteViewBuilder(r, tileset.texture);
+	const entityTiles: Array<[[number, number], EntityView]> = [];
+
+	for (let x = 0; x < layer[0].length; x++)
+		for (let y = 0; y < layer.length; y++) addSprite(builder, entityTiles, tileset, x, y, layer[y][x]);
+
+	return new MapLayerView(r, builder.build(), entityTiles);
+}
+
 export class MapView {
 	public static async load(r: Renderer, map: MapData): Promise<MapView> {
 		const tiles = await loadTiles(r, map.tiles);
@@ -163,11 +164,9 @@ export class MapView {
 		return new MapView(layers);
 	}
 
-	private constructor(private layers: MapLayerView[]) {
+	private constructor(private layers: MapLayerView[]) {}
-	}
 
 	public render(time: number): void {
-		for (const layer of this.layers)
+		for (const layer of this.layers) layer.render(time);
-			layer.render(time);
 	}
 }

src/renderer/runtime/view/renderer/renderer.ts

@@ -28,8 +28,7 @@ export class Renderer {
 
 	public createBuffer(): WebGLBuffer {
 		const ret = this.gl.createBuffer();
-		if (!ret)
+		if (!ret) throw new Error('unable to create buffer');
-			throw new Error('unable to create buffer');
 
 		return ret;
 	}
@@ -50,11 +49,11 @@ export class Renderer {
 		return this.shaders.samplerLoc;
 	}
 
-	public setCenter(v: vec2|number[]) {
+	public setCenter(v: vec2 | number[]): void {
 		this.snapToGrid(this.center, v);
 	}
 
-	public setTranslation(v: vec2|number[]) {
+	public setTranslation(v: vec2 | number[]): void {
 		vec2.sub(this.translation, v, this.center);
 		this.snapToGrid(this.translation, this.translation);
 		this.gl.uniform2fv(this.shaders.translateLoc, this.translation);
@@ -66,7 +65,7 @@ export class Renderer {
 		this.setTranslation([0, 0]);
 	}
 
-	public snapToGrid(out: vec2, a: vec2|number[]): void {
+	public snapToGrid(out: vec2, a: vec2 | number[]): void {
 		vec2.scale(out, a, this.coordScale);
 		vec2.round(out, out);
 		vec2.scale(out, out, 1 / this.coordScale);
@@ -84,14 +83,13 @@ export class Renderer {
 		const scale = this.viewScale * this.coordScale;
 
 		mat4.identity(this.viewport);
-		mat4.scale(this.viewport, this.viewport, [2 * scale / ws, -2 * scale / hs, 1.0]);
+		mat4.scale(this.viewport, this.viewport, [(2 * scale) / ws, (-2 * scale) / hs, 1.0]);
 		this.gl.uniformMatrix4fv(this.shaders.viewportLoc, false, this.viewport);
 	}
 
 	private mkContext(): WebGLRenderingContext {
 		const gl = this.canvas.getContext('webgl');
-		if (!gl)
+		if (!gl) throw new Error('unable to initialize WebGL context');
-			throw new Error('unable to initialize WebGL context');
 
 		return gl;
 	}

src/renderer/runtime/view/renderer/shaders.ts

@@ -11,8 +11,7 @@ export class Shaders {
 
 	constructor(private readonly gl: WebGLRenderingContext) {
 		const shaderProgram = this.gl.createProgram();
-		if (!shaderProgram)
+		if (!shaderProgram) throw new Error('Unable to create shader program');
-			throw new Error('Unable to create shader program');
 
 		const vertexShader = this.compileShader(this.gl.VERTEX_SHADER, vertexShaderSrc);
 		const fragmentShader = this.compileShader(this.gl.FRAGMENT_SHADER, fragmentShaderSrc);
@@ -46,8 +45,7 @@ export class Shaders {
 
 	private compileShader(type: number, src: string): WebGLShader {
 		const shader = this.gl.createShader(type);
-		if (!shader)
+		if (!shader) throw new Error('Unable to create shader');
-			throw new Error('Unable to create shader');
 
 		this.gl.shaderSource(shader, src);
 		this.gl.compileShader(shader);
@@ -63,16 +61,14 @@ export class Shaders {
 
 	private getAttribLocation(program: WebGLProgram, name: string): number {
 		const ret = this.gl.getAttribLocation(program, name);
-		if (ret < 0)
+		if (ret < 0) throw new Error("unable to get location of attribute '" + name + "'");
-			throw new Error("unable to get location of attribute '" + name + "'");
 
 		return ret;
 	}
 
 	private getUniformLocation(program: WebGLProgram, name: string): WebGLUniformLocation {
 		const ret = this.gl.getUniformLocation(program, name);
-		if (!ret)
+		if (!ret) throw new Error("unable to get location of uniform '" + name + "'");
-			throw new Error("unable to get location of uniform '" + name + "'");
 
 		return ret;
 	}

src/renderer/runtime/view/sprite.ts

@@ -2,34 +2,6 @@ import { Renderer } from './renderer/renderer';
 
 export type SpriteCoords = [number, number, number, number];
 
-export class SpriteViewBuilder {
-	private static pushSprite(buf: number[], coords: SpriteCoords): void {
-		const [x1, y1, x2, y2] = coords;
-
-		buf.push(x1); buf.push(y1);
-		buf.push(x2); buf.push(y1);
-		buf.push(x1); buf.push(y2);
-
-		buf.push(x1); buf.push(y2);
-		buf.push(x2); buf.push(y1);
-		buf.push(x2); buf.push(y2);
-	}
-
-	private readonly vertexData: number[] = [];
-	private readonly textureData: number[] = [];
-
-	constructor(private readonly r: Renderer, private readonly texture: WebGLTexture) {}
-
-	public addSprite(vertexCoords: SpriteCoords, texCoords: SpriteCoords): void {
-		SpriteViewBuilder.pushSprite(this.vertexData, vertexCoords);
-		SpriteViewBuilder.pushSprite(this.textureData, texCoords);
-	}
-
-	public build(): SpriteView {
-		return new SpriteView(this.r, this.texture, this.vertexData, this.textureData);
-	}
-}
-
 export class SpriteView {
 	private readonly vertexCount: number;
 	private readonly vertexBuffer: WebGLBuffer;
@@ -70,3 +42,37 @@ export class SpriteView {
 		gl.drawArrays(gl.TRIANGLES, 0, this.vertexCount);
 	}
 }
+
+export class SpriteViewBuilder {
+	private static pushSprite(buf: number[], coords: SpriteCoords): void {
+		const [x1, y1, x2, y2] = coords;
+
+		buf.push(x1);
+		buf.push(y1);
+		buf.push(x2);
+		buf.push(y1);
+		buf.push(x1);
+		buf.push(y2);
+
+		buf.push(x1);
+		buf.push(y2);
+		buf.push(x2);
+		buf.push(y1);
+		buf.push(x2);
+		buf.push(y2);
+	}
+
+	private readonly vertexData: number[] = [];
+	private readonly textureData: number[] = [];
+
+	constructor(private readonly r: Renderer, private readonly texture: WebGLTexture) {}
+
+	public addSprite(vertexCoords: SpriteCoords, texCoords: SpriteCoords): void {
+		SpriteViewBuilder.pushSprite(this.vertexData, vertexCoords);
+		SpriteViewBuilder.pushSprite(this.textureData, texCoords);
+	}
+
+	public build(): SpriteView {
+		return new SpriteView(this.r, this.texture, this.vertexData, this.textureData);
+	}
+}

src/renderer/runtime/view/util/image.ts

@@ -3,20 +3,20 @@ import { Renderer } from '../renderer/renderer';
 export function loadImage(url: string): Promise<HTMLImageElement> {
 	return new Promise((resolve, reject) => {
 		const img = new Image();
-		img.addEventListener('load', () => { resolve(img); });
+		img.addEventListener('load', () => {
-		img.addEventListener('error', () => { reject(new Error('failed to load ' + url)); });
+			resolve(img);
+		});
+		img.addEventListener('error', () => {
+			reject(new Error('failed to load ' + url));
+		});
 		img.src = url;
 	});
 }
 
-export function mkTexture(
+export function mkTexture(r: Renderer, src: HTMLCanvasElement | HTMLImageElement): [WebGLTexture, [number, number]] {
-	r: Renderer,
-	src: HTMLCanvasElement|HTMLImageElement,
-): [WebGLTexture, [number, number]] {
 	const gl = r.getContext();
 	const texture = gl.createTexture();
-	if (!texture)
+	if (!texture) throw new Error('unable to create texture');
-		throw new Error('unable to create texture');
 
 	gl.bindTexture(gl.TEXTURE_2D, texture);
 	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, src);
@@ -25,9 +25,7 @@ export function mkTexture(
 	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
 	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
 
-	const size: [number, number] = [
+	const size: [number, number] = [src.width / r.coordScale, src.height / r.coordScale];
-		src.width / r.coordScale, src.height / r.coordScale,
-	];
 
 	return [texture, size];
 }