eslint

.gitignore

@@ -1 +1,2 @@
 *.sw[po]
+node_modules/

UNLICENSE

@@ -0,0 +1,25 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org/>
+

eslint.config.mjs

@@ -0,0 +1,7 @@
+import js from "@eslint/js";
+import globals from "globals";
+import { defineConfig } from "eslint/config";
+
+export default defineConfig([
+  { files: ["**/*.{js,mjs,cjs}"], plugins: { js }, extends: ["js/recommended"], languageOptions: { globals: globals.browser } },
+]);

objects.js

@@ -2,7 +2,6 @@ import { MassObject } from './object.js';
 import { 
   MASS_CREATION_RATE, 
   DISPLAY_OBJECTS_INFO,
-  MOTION_TIME_SCALE,
   GRAVITATIONAL_CONSTANT,
   ZOOM_TO_FIT_PADDING,
 } from './config.js';
@@ -57,7 +56,6 @@ export class Objects {
 
   doneCreatingObject() {
     if (this.creatingObject !== undefined) {
-      const obj = this.objects[this.creatingObject];
       this.creatingObject = undefined;
       this.resume();
     }
@@ -138,7 +136,7 @@ export class Objects {
     }
   }
 
-  handlePointerUp({x, y}) {
+  handlePointerUp() {
     this.doneCreatingObject();
     this.deselect();
   }

package.json

@@ -0,0 +1,21 @@
+{
+  "name": "gravity",
+  "version": "0.2.0",
+  "description": "Gravity Simulator",
+  "main": "simulator.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "lint": "npx eslint"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@git.laddhoffman.com:lentil/gravity.git"
+  },
+  "author": "Ladd Hoffman <lentil@laddhoffman.com>",
+  "license": "Unlicense",
+  "devDependencies": {
+    "@eslint/js": "^9.39.2",
+    "eslint": "^9.39.2",
+    "globals": "^16.5.0"
+  }
+}

pointer.js

@@ -1,18 +1,13 @@
 import {
-  POINTER_HISTORY_SIZE,
-  ZOOM_IN_FACTOR,
-  ZOOM_OUT_FACTOR,
   DISPLAY_CURSOR_INFO,
   DRAGGABLE_ELEMENT_CLASSNAME,
   MODE_MASS_GENERATION,
   MODE_PAN_VIEW,
+  POINTER_HISTORY_SIZE,
+  ZOOM_IN_FACTOR,
+  ZOOM_OUT_FACTOR,
 } from './config.js';
 
-function dispatchEvent(target, eventType, data) {
-  const ev = new CustomEvent(eventType, {detail: data});
-  target.dispatchEvent(ev);
-}
-
 export class Pointer {
   sim = undefined;
 

tool/modes.js

@@ -40,11 +40,11 @@ export class ModeSwitch extends Tool {
       button.innerHTML = `<h3>${modeTitle}</h3>`;
       button.classList.add('wide');
 
-      button.addEventListener('click', (e) => this.setCurrentMode(modeID));
+      button.addEventListener('click', () => this.setCurrentMode(modeID));
     }
 
     // First listed mode is the default
-    const [[currentModeID, _]] = this.modes;
+    const [[currentModeID, ]] = this.modes;
     this.setCurrentMode(currentModeID);
 
     // Add global method to set/get current mode

tool/play-pause.js

@@ -29,7 +29,7 @@ export class PlayPause extends Tool {
       }
     });
 
-    playButton.addEventListener('click', (e) => {
+    playButton.addEventListener('click', () => {
       if (!this.playing) {
         this.playing = true;
         pauseButton.style.opacity = '100%';
@@ -43,6 +43,6 @@ export class PlayPause extends Tool {
   }
 
   set playing(playing) {
-    return this.sim.playing = playing;
+    this.sim.playing = playing;
   }
 }

toolbar.js

@@ -25,7 +25,7 @@ export class Toolbar {
   frame() {
     for (let tool in this.tools) {
       // TODO: tool.frame()
+      tool.frame();
     }
   }
-
 }