Jamie Fearon
Jamie Fearon

Reputation: 2634

Creating a particle using an image as a map

I'm having trouble creating a particle using an image as a map on a texture. Below is my code:

var camera, scene, renderer, material, img, texture;

init();
animate();

function init() {
  scene = new THREE.Scene();
  camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 10000);
  camera.position.z = 8000;
  scene.add(camera);

  img = new Image();
  texture = new THREE.Texture(img);

  img.onload = function() {
    texture.needsUpdate = true;
    makeParticle();
  };
  img.src = "http://www.aerotwist.com/tutorials/creating-particles-with-three-js/images/particle.png";

  renderer = new THREE.CanvasRenderer();
  renderer.setSize(window.innerWidth, window.innerHeight);
  document.body.appendChild(renderer.domElement);
}

function makeParticle() {
  material = new THREE.ParticleBasicMaterial({
    color: 0xE60000,
    size: 20,
    map: texture,
    blending: THREE.AdditiveBlending,
    transparent: true
  });
  // make the particle
  particle = new THREE.Particle(material);
  particle.scale.x = particle.scale.y = 1;
  scene.add(particle);
}


function animate() {
  requestAnimationFrame(animate);
  renderer.render(scene, camera);
}

A fiddle with this code is here: jsfiddle

I am aware I can use the Three Image Helper as follows:

map: THREE.ImageUtils.loadTexture(
  "FILE PATH"
),

But I am implementing my own asset loader and so do not wish to use it on an individual basis. Currently my code above shows no errors but no particle is displayed.

Upvotes: 1

Views: 1876

Answers (1)

Juan Mellado
Juan Mellado

Reputation: 15113

The particle is being displayed, but the camera is very far of it.

Change this line:

camera.position.z = 8000;

To something like this:

camera.position.z = 50;

Upvotes: 2

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