Design a robust, well structured and lightweight standalone sandbox particle & physics simulator. Keep it modular in design, functional and featured. Clean minimalistic interface, GUI is sleek, purposeful and modernized. One modal at top center of viewpor
Creating a standalone sandbox particle and physics simulator as you described is a big task, but I'll outline a solid structure using JavaScript and libraries like PIXI.js and PlayCanvas. Below is a conceptual design, modular architecture, and some code snippets to help you get started.
### Project Structure
```
/sandbox-particle-simulator
├── index.html
├── styles.css
├── app.js
├── /js
│ ├── emitter.js
│ ├── particle.js
│ ├── ui.js
│ ├── physics.js
│ ├── noise.js
└── /assets
├── textures/
└── sounds/
```
### index.html
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Particle & Physics Simulator</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<div id="app"></div>
<script src="https://cdn.jsdelivr.net/npm/pixi.js"></script>
<script src="https://cdn.jsdelivr.net/npm/playcanvas/build/playcanvas-stable.min.js"></script>
<script src="app.js"></script>
</body>
</html>
```
### styles.css
```css
body {
margin: 0;
font-family: 'Arial', sans-serif;
background-color: #222;
}
#app {
position: relative;
width: 100vw;
height: 100vh;
overflow: hidden;
}
#controls {
position: absolute;
top: 10px;
left: 50%;
transform: translateX(-50%);
display: flex;
gap: 10px;
}
#inputPanel {
position: absolute;
bottom: 10px;
left: 10px;
}
#propertiesPanel {
position: absolute;
top: 10px;
right: 10px;
background: rgba(255, 255, 255, 0.1);
padding: 10px;
border-radius: 8px;
}
```
### app.js
```javascript
const app = new PIXI.Application({ width: window.innerWidth, height: window.innerHeight });
document.getElementById('app').appendChild(app.view);
const controls = new Controls(app);
const propertyPanel = new PropertyPanel(app);
const emitters = [];
function createEmitter() {
const emitter = new Emitter();
emitters.push(emitter);
app.stage.addChild(emitter.container);
}
createEmitter(); // Initialize with one emitter
// Game Loop for updating particles
app.ticker.add(() => {
emitters.forEach(emitter => emitter.update());
});
// Handle control buttons
controls.playButton.addEventListener('click', () => { /* Play Logic */ });
controls.pauseButton.addEventListener('click', () => { /* Pause Logic */ });
controls.stopButton.addEventListener('click', () => { /* Stop Logic */ });
controls.restartButton.addEventListener('click', () => { /* Restart Logic */ });
```
### Emitter Module (emitter.js)
```javascript
class Emitter {
constructor() {
this.container = new PIXI.Container();
this.particles = [];
this.emissionRate = 5; // particles per second
this.gravity = 0; // gravity strength
// Add more properties as needed
this.init();
}
init() {
// Logic to initialize the emitter
}
update() {
// Emit particles based on the emission rate and update them
for (let i = 0; i < this.emissionRate; i++) {
this.emitParticle();
}
// Update existing particles
this.updateParticles();
}
emitParticle() {
const particle = new Particle();
this.particles.push(particle);
this.container.addChild(particle.sprite);
}
updateParticles() {
// Logic to update particles (position, life, etc.)
this.particles.forEach((particle, index) => {
if (particle.isAlive()) {
particle.update();
} else {
this.container.removeChild(particle.sprite);
this.particles.splice(index, 1);
}
});
}
}
```
### Particle Module (particle.js)
```javascript
class Particle {
constructor() {
this.sprite = new PIXI.Sprite(PIXI.Texture.from('particle.png'));
// Initialize particle properties
this.life = Math.random() * 100 + 50;
this.direction = Math.random() * 360; // in degrees
this.speed = Math.random() * 5 + 1;
this.alpha = 1;
// More properties...
}
isAlive() {
return this.life > 0;
}
update() {
// Logic to move the particle, reduce life
this.position.x += Math.cos(this.direction) * this.speed;
this.position.y += Math.sin(this.direction) * this.speed;
this.life--;
this.alpha -= 1 / this.life; // Example fade out effect
this.sprite.alpha = this.alpha;
}
}
```
### User Interface & Controls Module (ui.js)
This module will handle the interface for controls and properties like sliders and text inputs. Below is a sample of what the controls might look like.
```javascript
class Controls {
constructor(app) {
this.container = new PIXI.Container();
app.stage.addChild(this.container);
this.playButton = this.createButton('Play');
this.pauseButton = this.createButton('Pause');
this.stopButton = this.createButton('Stop');
this.restartButton = this.createButton('Restart');
this.container.addChild(this.playButton, this.pauseButton, this.stopButton, this.restartButton);
// Position buttons properly
}
createButton(label) {
const button = new PIXI.Text(label, { fontSize: 16, fill: 0xffffff });
// Add button interaction here
return button;
}
}
```
### Properties Panel Module (properties.js)
Here we expose all properties for the user to modify.
```javascript
class PropertyPanel {
constructor(app) {
this.container = new PIXI.Container();
app.stage.addChild(this.container);
this.createInputs();
}
createInputs() {
// Create input fields for all properties like particle life, speed, color, etc.
// Using PIXI.TextInput for inputs
}
}
```
### Conclusion
This design focuses on modularity and offers a functional and clean interface using PIXI.js for rendering. You can expand the core functionalities to meet all requirements. Implement graphical UI libraries like `pixi-textinput` for text fields to update properties, and utilize JavaScript Promises or async/await for asynchronous operations if needed (e.g., loading textures).
As this is a conceptual guide, you will need to implement specific functionalities based on your detailed requirements and execution.