Vue
fromSlicker
1 week agoBasic Physics Engine in about 100 lines of pure JavaScript
Simulates moving balls under gravity with basic collision detection and elastic impulses using simple code without external libraries.
Step 2: Initialize Canvas and Constants Set up the canvas context and define the physical parameters of your cradle: const canvas = document.getElementById('canvas'); const ctx = canvas.getContext('2d'); const numBalls = 5; // Number of balls in cradle const ballRadius = 20; // Radius of each ball const stringLength = 150; // Length of pendulum string const frameY = 50; // Y position of top frame const spacing = ballRadius * 2 + 2; // Space between balls const centerX = canvas.width / 2; // Center of canvas let balls = []; let dragging = null; // Track which ball is being dragged