test buffer geometry

test buffer geometry

by Konstantin Cryman

HTML

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>My first three.js app</title>
		<style>
			body { margin: 0; }
		</style>
	</head>
	<body>
		<script src="js/three.js"></script>
		<script>
			// Our Javascript will go here.
		</script>
	</body>
</html>

JavaScript

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );

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

const newTestGeometry = new THREE.BufferGeometry();

const verticesForBufferGeometry = [ 
	...new THREE.Vector3( 0, 0, 0 ).toArray(), 
	...new THREE.Vector3( 0, 1, 0 ).toArray(), 
	...new THREE.Vector3( 1, 0, 0 ).toArray(), 
	...new THREE.Vector3( 0, 1, 0 ).toArray(), 
	...new THREE.Vector3( 1, 0, 0 ).toArray(), 
	...new THREE.Vector3( 1, 1, 0 ).toArray(), 
];
const verticiesForNormals = [].concat( newTestGeometry );
/* const facesForBufferGeometry = [ 2, 1, 0, 3, 4, 5 ]; */
const facesForBufferGeometry = [ 2, 1, 0, 3, 4, 5 ];
const uvs = new Float32Array([
	0.0, 0.0,
  0.0, 1.0,
  1.0, 0.0,
  0.0, 1.0,
  1.0, 0.0,
  1.0, 1.0
]);

newTestGeometry.addAttribute('uv', new THREE.BufferAttribute( uvs, 2 ) )

  newTestGeometry.addAttribute( 
  'position', 
  new THREE.BufferAttribute( new Float32Array( verticesForBufferGeometry ), 3 ) 
  );
  newTestGeometry.addAttribute( 
  'normal', 
  new THREE.BufferAttribute( new Float32Array( verticiesForNormals ), 3 ) 
  );
  newTestGeometry.setIndex(  facesForBufferGeometry );

const geometry = new THREE.BoxGeometry( 1, 1, 1 );
const txture = new THREE.Texture();
const material = new THREE.MeshStandardMaterial( { 
  color: 0xeeeeee, 
  emissive: 0xcccccc, 
  map: txture, 
  side: THREE.DoubleSide 
});
const cube = new THREE.Mesh( newTestGeometry, material );
scene.add( cube );

camera.position.z = 5;

const nextIMG = new Image();
nextIMG.onload = function(){
  txture.image = nextIMG;
  txture.needUpdate = true;
  cube.material.map = txture;
  cube.material.needsUpdate = true;
}
nextIMG.src = 'https://www.gravatar.com/avatar/cd66a8f3b8915635bd6620ce59ce6397?s=64';

function animate() {
  requestAnimationFrame( animate );
  // cube.rotation.x +=...