help with this javascript cube please RSS

• • Reply
  Lexi85

  Member

  200 Points

  691 Posts

  help with this javascript cube please

  Aug 15, 2016 07:39 AM|Lexi85|LINK

  Hello All,

  I have been struggling a lot with this

  I have below code for a cube out of cubes...I managed to get this online but I need to arrange these small cubes in this in an order, not random and also same color not different colours...can some one plz help me how do I change this to all same size and cubes in a level and all same color please

  <script>
  
  			var container, stats;
  			var camera, scene, raycaster, renderer;
  
  			var mouse = new THREE.Vector2(), INTERSECTED;
  			var radius = 500, theta = 0;
  			var frustumSize = 1000;
  
  			init();
  			animate();
  
  			function init() {
  
  				container = document.createElement( 'div' );
  				document.body.appendChild( container );
  
  				var info = document.createElement( 'div' );
  				info.style.position = 'absolute';
  				info.style.top = '10px';
  				info.style.width = '100%';
  				info.style.textAlign = 'center';
  				info.innerHTML = '<a href="http://threejs.org" target="_blank">three.js</a> webgl - interactive cubes';
  				container.appendChild( info );
  
  				var aspect = window.innerWidth / window.innerHeight;
  				camera = new THREE.OrthographicCamera( frustumSize * aspect / - 2, frustumSize * aspect / 2, frustumSize / 2, frustumSize / - 2, 1, 1000 );
  
  				scene = new THREE.Scene();
  
  				var light = new THREE.DirectionalLight( 0xffffff, 1 );
  				light.position.set( 1, 1, 1 ).normalize();
  				scene.add( light );
  
  				var geometry = new THREE.BoxBufferGeometry( 20, 20, 20 );
  
  				for ( var i = 0; i < 10000; i ++ ) {
  
  					var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } ) );
  
  					
  object.position.x = Math.random() * 800 - 400;
  					object.position.y = Math.random() * 800 - 400;
  					object.position.z = Math.random() * 800 - 400;
  
  					object.rotation.x = Math.random() * 2 * Math.PI;
  					object.rotation.y =Math.random() * 2 * Math.PI;
  					object.rotation.z = Math.random() * 2 * Math.PI;
  					
  					scene.add( object );
  
  				}
  
  				raycaster = new THREE.Raycaster();
  
  				renderer = new THREE.WebGLRenderer();
  				renderer.setClearColor( 0xf0f0f0 );
  				renderer.setPixelRatio( window.devicePixelRatio );
  				renderer.setSize( window.innerWidth, window.innerHeight );
  				renderer.sortObjects = false;
  				container.appendChild(renderer.domElement);
  
  				stats = new Stats();
  				container.appendChild( stats.dom );
  
  				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
  
  				//
  
  				window.addEventListener( 'resize', onWindowResize, false );
  
  			}
  
  			function onWindowResize() {
  
  				var aspect = window.innerWidth / window.innerHeight;
  
  				camera.left   = - frustumSize * aspect / 2;
  				camera.right  =   frustumSize * aspect / 2;
  				camera.top    =   frustumSize / 2;
  				camera.bottom = - frustumSize / 2;
  
  				camera.updateProjectionMatrix();
  
  				renderer.setSize( window.innerWidth, window.innerHeight );
  
  			}
  
  			function onDocumentMouseMove( event ) {
  
  				event.preventDefault();
  
  				mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
  				mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
  
  			}
  
  			//
  
  			function animate() {
  
  				requestAnimationFrame( animate );
  
  				render();
  				stats.update();
  
  			}
  
  			function render() {
  
  				theta += 0.1;
  
  				camera.position.x = radius * Math.sin( THREE.Math.degToRad( theta ) );
  				camera.position.y = radius * Math.sin( THREE.Math.degToRad( theta ) );
  				camera.position.z = radius * Math.cos( THREE.Math.degToRad( theta ) );
  				camera.lookAt( scene.position );
  
  				camera.updateMatrixWorld();
  
  				// find intersections
  
  				raycaster.setFromCamera( mouse, camera );
  
  				var intersects = raycaster.intersectObjects( scene.children );
  
  				if ( intersects.length > 0 ) {
  
  					if ( INTERSECTED != intersects[ 0 ].object ) {
  
  						if ( INTERSECTED ) INTERSECTED.material.emissive.setHex( INTERSECTED.currentHex );
  
  						INTERSECTED = intersects[ 0 ].object;
  						INTERSECTED.currentHex = INTERSECTED.material.emissive.getHex();
  						INTERSECTED.material.emissive.setHex( 0xff0000 );
  
  					}
  
  				} else {
  
  					if ( INTERSECTED ) INTERSECTED.material.emissive.setHex( INTERSECTED.currentHex );
  
  					INTERSECTED = null;
  
  				}
  
  				renderer.render( scene, camera );
  
  			}
  
  		</script>

• • Reply
  Ailleen

  Member

  540 Points

  130 Posts

  Re: help with this javascript cube please

  Aug 16, 2016 12:48 PM|Ailleen|LINK

  Hi Lexi85,

  var geometry = new THREE.BoxBufferGeometry(20, 20, 20);
  for (var i = 0; i < 10000; i++) {
   
      var object = new THREE.Mesh(geometry, new THREE.MeshLambertMaterial({ color: Math.random() * 0xffffff }));
   
   
      object.position.x = Math.random() * 800 - 400;
      object.position.y = Math.random() * 800 - 400;
      object.position.z = Math.random() * 800 - 400;
   
      object.rotation.x = Math.random() * 2 * Math.PI;
      object.rotation.y = Math.random() * 2 * Math.PI;
      object.rotation.z = Math.random() * 2 * Math.PI;
   
      scene.add(object);
   
  }
  

  It seems you used the three.js canvas.

  From your code, the BoxBufferGeometryBesides draw a box. In your for()method, the color were set Math.random() * 0xffffff  which a random color. You could refer the API to know how to set color. And the position or rotation you also set the  Math.random() which a random position .You could refer to the API learn more about the “three.js”. http://threejs.org/docs/index.html#Reference/Objects/Bone .

  Best Regards,

  Ailleen

  
  MSDN Community Support
  Please remember to "Mark as Answer" the responses that resolved your issue.
  
• • Reply
  Lexi85

  Member

  200 Points

  691 Posts

  Re: help with this javascript cube please

  Aug 16, 2016 12:53 PM|Lexi85|LINK

  Yes its just that I am unable to figure out how to code for few cubes to be random color and few cubes to be transparent...