Canvas Particle & Meteor Effects Tutorial

To achieve cool particle and meteor effects, you can use Canvas to draw animations. Here is a simple example code to achieve this effect:

1. Create an HTML document and add a Canvas element to it.

<canvas id="canvas" width="800" height="600"></canvas>

1. Write code in Javascript to achieve particle and meteor effects.

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

let particles = [];

function createParticles() {
  for (let i = 0; i < 100; i++) {
    let particle = {
      x: Math.random() * canvas.width,
      y: Math.random() * canvas.height,
      speedX: Math.random() * 4 - 2,
      speedY: Math.random() * 4 - 2,
      color: 'white',
      size: Math.random() * 3 + 1
    };
    particles.push(particle);
  }
}

function drawParticles() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  
  for (let i = 0; i < particles.length; i++) {
    let particle = particles[i];
    
    ctx.fillStyle = particle.color;
    ctx.beginPath();
    ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
    ctx.fill();
    
    particle.x += particle.speedX;
    particle.y += particle.speedY;
    
    if (particle.x > canvas.width || particle.x < 0) {
      particle.speedX *= -1;
    }
    if (particle.y > canvas.height || particle.y < 0) {
      particle.speedY *= -1;
    }
  }
}

function createMeteor() {
  let meteor = {
    x: Math.random() * canvas.width,
    y: 0,
    speedY: Math.random() * 4 + 2,
    color: 'red',
    size: Math.random() * 5 + 2
  };
  particles.push(meteor);
}

function draw() {
  createParticles();
  
  setInterval(() => {
    createMeteor();
  }, 3000);
  
  setInterval(() => {
    drawParticles();
  }, 1000 / 60);
}

draw();

The above code will draw 100 white particles on the Canvas and generate a red shooting star at the top every 3 seconds. By controlling the speed and position of the particles, different effects can be achieved. You can adjust the parameters in the code to create cooler effects as needed.