Webpack setup, mesh and math classes

This commit is contained in:
Alan O'Cull 2023-12-02 19:42:46 -05:00
parent dbf095b2ca
commit 53381f0496
16 changed files with 30015 additions and 9 deletions

2
.gitignore vendored
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@ -1,3 +1,3 @@
node_modules/ node_modules/
build/ build/
dist/

24
assets/css/puzzle.css Normal file
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@ -0,0 +1,24 @@
body {
overflow: hidden;
}
h1 {
text-align: center;
width: 80%;
margin-left: 10%;
margin-right: 10%;
}
.canvas_container {
width: 100%;
align-content: center;
justify-content: center;
}
canvas {
width: 80vmin;
height: 80vmin;
display: block;
margin-left: auto;
margin-right: auto;
}

28761
assets/objects/hard/clover.obj Normal file

File diff suppressed because it is too large Load Diff

17
assets/puzzle.html Normal file
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@ -0,0 +1,17 @@
<!DOCTYPE html>
<html>
<head>
<title>Pattern Packer</title>
<link rel="stylesheet" href="../css/puzzle.css">
<script src="client.js"></script>
</head>
<body>
<h1>01</h1>
<div class="canvas_container">
<canvas id="draw" width="1024" height="1024">
</canvas>
</div>
</body>
</html>

688
package-lock.json generated
View File

@ -11,11 +11,24 @@
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"@types/express": "^4.17.21", "@types/express": "^4.17.21",
"typescript": "^5.3.2" "ts-loader": "^9.5.1",
"typescript": "^5.3.2",
"webpack-cli": "^5.1.4"
}, },
"name": "pattern-packer", "name": "pattern-packer",
"version": "1.0.0", "version": "1.0.0",
@ -9,10 +11,9 @@
"main": "index.js", "main": "index.js",
"scripts": { "scripts": {
"all": "npm run clean && npm run build && npm run start", "all": "npm run clean && npm run build && npm run start",
"allwin": "npm run build && npm run start",
"clean": "rm -rf build/", "clean": "rm -rf build/",
"cleanwin": "rmdir -Recurse -Force /S /Q .\\build\\", "prebuild": "mkdir -p dist/public/ && cp -R assets/* dist/public/",
"build": "tsc", "build": "tsc && webpack --config ./webpack/development.js",
"rebuild": "npm run clean && npm run build", "rebuild": "npm run clean && npm run build",
"server": "node ./build/server/server.js", "server": "node ./build/server/server.js",
"debug": "node ./build/server/server.js -debug" "debug": "node ./build/server/server.js -debug"
@ -32,6 +33,8 @@
"dependencies": { "dependencies": {
"dotenv": "^16.3.1", "dotenv": "^16.3.1",
"express": "^4.18.2", "express": "^4.18.2",
"webpack": "^5.89.0" "lodash": "^4.17.21",
"webpack": "^5.89.0",
"webpack-node-externals": "^3.0.0"
} }
} }

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@ -0,0 +1,13 @@
import { Mesh, MeshImport } from "./mesh";
const request_mesh = (filename: string) => {
let request = new XMLHttpRequest();
request.open('GET', `localhost:${3000}/mesh/${filename}`, false);
request.send(null);
return request.responseText;
}
const buff = request_mesh('clover.obj');
const mesh = MeshImport.parse(buff);
console.log(`Got mesh array at ${mesh.name}`);
console.log(mesh.shells);

5
src/client/math/index.ts Normal file
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@ -0,0 +1,5 @@
import Vector2 from './vector';
import Triangle from './triangle';
import Shell from './shell';
export { Vector2, Triangle, Shell };

65
src/client/math/shell.ts Normal file
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@ -0,0 +1,65 @@
import Vector2 from './vector';
import Triangle from './triangle';
class Shell {
public centerpoint: Vector2 = new Vector2();
public rotation: number = 0;
public scale: number = 1.0;
constructor(private triangles: Triangle[]) {
}
public get uvs(): Vector2[] {
let uvs: Vector2[] = [];
this.triangles.forEach((t: Triangle) => {
t.uvs.forEach((c: Vector2) => {
uvs.push(Vector2.Multiply(Vector2.Rotate(c, this.rotation), this.scale));
})
})
return uvs;
};
public connected(t: Triangle): boolean {
for (let i = 0; i < this.triangles.length; i++) {
if (this.triangles[i].connected_fast(t)) {
return true;
}
}
return false;
}
public connected_shell(s: Shell): boolean {
for (let i = 0; i < this.triangles.length; i++) {
for (let j = 0; j < s.triangles.length; j++) {
if (this.triangles[i].connected_fast(s.triangles[j])) {
return true;
}
}
}
return false;
}
public merge(other: Shell) {
this.triangles = this.triangles.concat(other.triangles);
}
public append(t: Triangle) {
this.triangles.push(t);
}
public calculate_centerpoint() {
let uvs = Triangle.find_unique_uvs(this.triangles);
this.centerpoint = new Vector2();
uvs.forEach((coord: Vector2) => {
this.centerpoint = Vector2.Add(this.centerpoint, coord);
});
this.centerpoint = Vector2.Divide(this.centerpoint, uvs.length);
this.triangles.forEach((t: Triangle) => {
t.set_centerpoint(this.centerpoint);
});
}
}
export { Shell as default };

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@ -0,0 +1,78 @@
import Vector2 from './vector';
const EPSILON = 0.0001;
class Triangle {
public uvs: Vector2[];
constructor (private coords: number[], private baseuvs: Vector2[], public uv_indices: number[]) {
this.uvs = [];
baseuvs.forEach((coord: Vector2) => {
this.uvs.push(Vector2.Clone(coord));
})
}
/**
* @summary Compares to see if the triangles share a UV coordinate
* @param t Triangle to see if this is connected to
* @returns If true, triangles are connected
*/
public connected(t: Triangle): boolean {
for (let i = 0; i < 3; i++) {
const c1 = this.baseuvs[i];
for (let j = 0; j < 3; j++) {
const c2 = t.baseuvs[j];
if (Vector2.Distance(c1, c2) < EPSILON) {
return true;
}
}
}
return false;
}
/**
* @summary Compares to see if the triangles share a UV coordinate (based on mesh indices)
* @param t Triangle to see if this is connected to
* @returns If true, triangles are connected
*/
public connected_fast(t: Triangle): boolean {
for (let i = 0; i < 3; i++) {
const idx1 = this.uv_indices[i];
for (let j = 0; j < 3; j++) {
const idx2 = t.uv_indices[j];
if (idx1 === idx2) {
return true;
}
}
}
return false;
}
public set_centerpoint(center: Vector2) {
for (let i = 0; i < this.uvs.length; i++) {
this.uvs[i] = Vector2.Subtract(this.baseuvs[i], center);
}
}
static find_unique_uvs(tris: Triangle[]): Vector2[] {
let uvs: Vector2[] = [];
tris.forEach((t: Triangle) => {
t.uvs.forEach((uv: Vector2) => {
let exists: boolean = false;
for (let i = 0; i < uvs.length; i++) {
if (Vector2.Distance(uv, uvs[i]) < EPSILON) {
exists = true;
break;
}
}
if (!exists) {
uvs.push(Vector2.Clone(uv));
}
});
});
return uvs;
}
}
export { Triangle as default };

117
src/client/math/vector.ts Normal file
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@ -0,0 +1,117 @@
const TwoPI = Math.PI * 2;
class Vector2 { // A structure that holds position data or direction and magnitude
public x: number;
public y: number;
constructor(X: number = 0, Y: number = 0) {
this.x = X;
this.y = Y;
}
// Returns length of this vector (or should this be static?)
public length():number {
return Math.sqrt((this.x ** 2) + (this.y ** 2));
}
// Limits length of this vector to a set field
public clamp(minLen: number, maxLen: number = minLen): Vector2 {
const len = this.length();
const lenF = Math.min(Math.max(len, minLen), maxLen);
if (lenF !== len) {
const unit = Vector2.UnitVector(this);
this.x = unit.x * lenF;
this.y = unit.y * lenF;
}
return this;
}
public equals(compareTo: Vector2): boolean {
return (this.x === compareTo.x && this.y === compareTo.y);
}
// Static methods--generates new vectors to avoid overriding old properties
static Add(a: Vector2, b: Vector2):Vector2 {
return new Vector2(a.x + b.x, a.y + b.y);
}
static Subtract(a: Vector2, b: Vector2):Vector2 {
return new Vector2(a.x - b.x, a.y - b.y);
}
static Multiply(a: Vector2, b: number):Vector2 { // A is a vector, b should be a scalar number
return new Vector2(a.x * b, a.y * b);
}
static Divide(a: Vector2, b: number):Vector2 {
return new Vector2(a.x / b, a.y / b);
}
static MultiplyVectors(a: Vector2, b: Vector2):Vector2 {
return new Vector2(a.x * b.x, a.y * b.y);
}
// Returns a copy of the given vector with the same direction but a length of one
static UnitVector(a: Vector2):Vector2 {
const len = a.length();
if (len <= 0) return new Vector2(0, 0);
return new Vector2(a.x / len, a.y / len);
}
static UnitVectorFromXY(x: number, y: number) {
const len = Math.sqrt((x ** 2) + (y ** 2));
if (len <= 0) return new Vector2(0, 0);
return new Vector2(x / len, y / len);
}
static UnitVectorFromAngle(angle: number): Vector2 {
return new Vector2(Math.cos(angle), Math.sin(angle));
}
// Gets the dot product between two vectors
// Use normalized vectors for scalar value between -1 and 1
static DotProduct(a: Vector2, b: Vector2): number {
return a.x * b.x + a.y * b.y;
}
static Distance(a: Vector2, b:Vector2):number {
return Math.sqrt(((a.x - b.x) ** 2) + ((a.y - b.y) ** 2));
}
static Average(a: Vector2, b: Vector2):Vector2 {
return new Vector2((a.x + b.x) / 2, (a.y + b.y) / 2);
}
static Lerp(a: Vector2, b: Vector2, alpha: number):Vector2 {
const alpha2 = 1 - alpha;
return new Vector2(a.x * alpha2 + b.x * alpha, a.y * alpha2 + b.y * alpha);
}
static Clone(a: Vector2):Vector2 {
return new Vector2(a.x, a.y);
}
static Angle(a: Vector2): number {
if (a.y < 0) {
return Math.atan2(a.y, a.x) + TwoPI;
}
return Math.atan2(a.y, a.x);
}
static Rotate(a: Vector2, angle: number) {
const delta = Vector2.Angle(a) + angle;
return Vector2.Multiply(Vector2.UnitVectorFromAngle(delta), a.length());
}
static ConstrainAngle(angle: number, min: number = 0, max: number = TwoPI): number {
let a = angle;
while (a < 0) {
a += TwoPI;
}
while (a >= TwoPI) {
a -= TwoPI;
}
return Math.max(min, Math.min(a, max));
}
static ToString(a: Vector2): string {
return `(${a.x}, ${a.y})`;
}
}
export { Vector2 as default };

112
src/client/mesh/import.ts Normal file
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@ -0,0 +1,112 @@
import { Vector2, Triangle, Shell } from "../math";
import Mesh from './mesh';
const parse_obj = (line: string) => {
return line.split(' ')[1];
}
const parse_vertex = (line: string) => {
let vals: string[] = line.split(' ');
let nums: number[] = [];
for (let i = 1; i < 4 && i < vals.length; i++) {
nums[i-1] = parseFloat(vals[i]);
}
return nums;
}
const parse_uv = (line: string) => {
let vals: string[] = line.split(' ');
return new Vector2(parseFloat(vals[1]), parseFloat(vals[2]));
}
const parse_tri = (line: string) => {
let vals: string[] = line.split(' ');
let nums: number[] = [];
for (let i = 1; i < 4 && i < vals.length; i++) {
nums[i-1] = parseFloat(vals[i]);
}
return nums;
}
class MeshImport {
public static parse(buffer: string) {
const buff = buffer.split('\n');
// Initialize buffers
let verts: number[] = [];
let uvs: Vector2[] = [];
let tris: number[] = [];
let name: string = 'obj';
// Parse data
buff.forEach((line: string) => {
if (line.startsWith('o')) {
name = parse_obj(line);
} else if (line.startsWith('vt')) {
uvs.push(parse_uv(line));
} else if (line.startsWith('v')) {
verts = verts.concat(parse_vertex(line));
} else if (line.startsWith('f')) {
tris = tris.concat(parse_tri(line));
}
});
// Construct triangles
let t: Triangle[] = [];
for (let i = 0; i < tris.length; i += 6) {
let indices: number[] = [tris[i], tris[i+2], tris[i+4]];
let v: number[] = [];
indices.forEach((x: number) => {
v.push(verts[x], verts[x+1], verts[x+2]);
});
let uvi: number[] = [tris[i+1] - 1, tris[i+3] - 1, tris[i+5] - 1];
let uv: Vector2[] = [uvs[uvi[0]], uvs[uvi[1]], uvs[uvi[2]]];
t.push(new Triangle(v, uv, uvi));
}
// Create an initial shell
let shells: Shell[] = [];
// Initialize shells by sorting triangles roughly int othem
for (let i = 0; i < t.length; i++) {
let tri: Triangle = t[i];
let utilized: boolean = false;
for (let j = 0; j < shells.length; j++) {
if (shells[j].connected(tri)) {
utilized = true;
shells[j].append(tri);
break;
}
}
// If we could not find a corresponding shell, generate one
if (!utilized) {
shells.push(new Shell([tri]));
}
}
// Now, combine shells
for (let i = 0; i < shells.length; i++) {
const a = shells[i];
for (let j = i+1; j < shells.length; j++) {
const b = shells[j];
if (a.connected_shell(b)) {
a.merge(b);
shells = shells.splice(j, 1);
j--;
}
}
}
// Finally, calculate shells
shells.forEach((s: Shell) => {
s.calculate_centerpoint();
});
// Generate corresponding mesh
return new Mesh(name, shells);
}
}
export { MeshImport as default };

4
src/client/mesh/index.ts Normal file
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@ -0,0 +1,4 @@
import Mesh from './mesh';
import MeshImport from './import';
export { Mesh, MeshImport };

10
src/client/mesh/mesh.ts Normal file
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@ -0,0 +1,10 @@
import { Shell } from "../math";
class Mesh {
constructor (public name: String, public shells: Shell[]) {
}
}
export { Mesh as default };

View File

@ -9,7 +9,15 @@ const app: Express = express();
const port = process.env.PORT; const port = process.env.PORT;
app.get('/', (req: Request, res: Response) => { app.get('/', (req: Request, res: Response) => {
res.send('hello world'); const last = req.url.lastIndexOf('/');
const mesh_name = req.url.substring(last + 1);
const filepath = `assets/pages/${mesh_name}`;
if (fs.existsSync(filepath)) {
fs.readFileSync(`assets/pages/${mesh_name}`).toString('utf8');
} else {
res.send('o hello world');
}
}); });
app.listen(port, () => { app.listen(port, () => {

105
webpack/development.js Normal file
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@ -0,0 +1,105 @@
/* eslint-disable no-console */
const _ = require('lodash');
// eslint-disable-next-line
const webpack = require('webpack');
const path = require('path');
// eslint-disable-next-line
const nodeExternals = require('webpack-node-externals');
const childProcess = require('child_process');
// https://webpack.js.org/concepts/targets/
// Also suggests splitting up the config into two pieces... Better for us anyway.
const commonConfig = {
mode: 'development',
resolve: {
extensions: ['.tsx', '.ts', '.js', '.jsx'],
},
module: {
rules: [
{
test: /\.tsx?$/,
use: 'ts-loader',
exclude: /node_modules/,
},
],
},
};
const clientConfig = _.defaultsDeep(_.cloneDeep(commonConfig), {
target: 'web',
entry: {
client: './src/client/client.ts',
},
output: {
filename: '[name].js',
path: path.resolve(__dirname, '../dist/public'),
},
externals: ['perf_hooks'],
plugins: [
new webpack.DefinePlugin({
CANVAS_RENDERER: JSON.stringify(true),
WEBGL_RENDERER: JSON.stringify(true),
}),
],
devtool: 'eval-source-map', // inline-source-map
});
const serverConfig = _.defaultsDeep(_.cloneDeep(commonConfig), {
target: 'node',
entry: {
server: './src/server/server.ts',
},
output: {
filename: '[name].js',
path: path.resolve(__dirname, '../dist'),
},
externals: [nodeExternals()],
plugins: [
{
apply: (compiler) => {
let ps = null;
let watchEnabled = false;
async function startServer() {
const serverPath = path.join(__dirname, '../dist/server.js');
console.log(`Starting ${serverPath} ...`);
ps = childProcess.spawn('node', [serverPath]);
ps.stdout.on('data', (data) => {
process.stdout.write(data);
});
ps.stderr.on('data', (data) => {
process.stderr.write(data);
});
// Automatically restart the server if it crashes.
ps.once('close', () => {
console.log('Crash detected, restarting ...');
startServer();
});
}
// https://webpack.js.org/api/compiler-hooks/
compiler.hooks.afterEmit.tap('RunServer', () => {
if (watchEnabled) {
if (ps !== null) {
console.log('Killing old process ...');
ps.kill();
} else {
startServer();
}
}
});
compiler.hooks.watchRun.tap('RunServer', () => {
console.log('Watch enabled, will restart server process automatically');
watchEnabled = true;
});
},
},
],
});
module.exports = [clientConfig, serverConfig];