javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - loaders - vox</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>

	<body>
		<div id="info">
		<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - vox loader (<a href="https://ephtracy.github.io/" target="_blank" rel="noopener">Magica Voxel</a>)
		</div>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import { OrbitControls } from './jsm/controls/OrbitControls.js';
			import { VOXLoader } from './jsm/loaders/VOXLoader.js';

			let camera, controls, scene, renderer;

			init();
			animate();

			function init() {

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 10 );
				camera.position.set( 0.175, 0.075, 0.175 );

				scene = new THREE.Scene();
				scene.add( camera );

				// light

				const hemiLight = new THREE.HemisphereLight( 0x888888, 0x444444, 1 );
				scene.add( hemiLight );

				const dirLight = new THREE.DirectionalLight( 0xffffff, 0.75 );
				dirLight.position.set( 1.5, 3, 2.5 );
				scene.add( dirLight );

				const dirLight2 = new THREE.DirectionalLight( 0xffffff, 0.5 );
				dirLight2.position.set( - 1.5, - 3, - 2.5 );
				scene.add( dirLight2 );

				const loader = new VOXLoader();
				loader.load( 'models/vox/monu10.vox', function ( chunks ) {

					for ( let i = 0; i < chunks.length; i ++ ) {

						const chunk = chunks[ i ];

						const geometry = buildGeometry( chunk );
						const material = new THREE.MeshStandardMaterial( {
							vertexColors: geometry.hasAttribute( 'color' )
						} );

						const mesh = new THREE.Mesh( geometry, material );
						mesh.scale.setScalar( 0.0015 );
						scene.add( mesh );

					}

				} );

				// renderer

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

				// controls

				controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = .1;
				controls.maxDistance = 0.5;

				//

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function buildGeometry( chunk ) {

				const data = chunk.data;
				const size = chunk.size;
				const palette = chunk.palette;

				// displayPalette( palette );

				const vertices = [];
				const colors = [];

				const nx = [ 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1 ];
				const px = [ 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 ];
				const py = [ 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1 ];
				const ny = [ 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0 ];
				const nz = [ 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0 ];
				const pz = [ 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1 ];

				function add( tile, x, y, z, r, g, b ) {

					x -= size.x / 2;
					y -= size.z / 2;
					z += size.y / 2;

					for ( let i = 0; i < 18; i += 3 ) {

						vertices.push( tile[ i + 0 ] + x, tile[ i + 1 ] + y, tile[ i + 2 ] + z );
						colors.push( r, g, b );

					}

				}

				// Store data in a volume for sampling

				const offsety = size.x;
				const offsetz = size.x * size.y;

				const array = new Uint8Array( size.x * size.y * size.z );

				for ( let j = 0; j < data.length; j += 4 ) {

					const x = data[ j + 0 ];
					const y = data[ j + 1 ];
					const z = data[ j + 2 ];

					const index = x + ( y * offsety ) + ( z * offsetz );

					array[ index ] = 255;

				}

				// Construct geometry

				let hasColors = false;

				for ( let j = 0; j < data.length; j += 4 ) {

					const x = data[ j + 0 ];
					const y = data[ j + 1 ];
					const z = data[ j + 2 ];
					const c = data[ j + 3 ];

					const hex = palette[ c ];
					const r = ( hex >> 0 & 0xff ) / 0xff;
					const g = ( hex >> 8 & 0xff ) / 0xff;
					const b = ( hex >> 16 & 0xff ) / 0xff;

					if ( r > 0 || g > 0 || b > 0 ) hasColors = true;

					const index = x + ( y * offsety ) + ( z * offsetz );

					if ( array[ index + 1 ] === 0 || x === size.x - 1 ) add( px, x, z, - y, r, g, b );
					if ( array[ index - 1 ] === 0 || x === 0 ) add( nx, x, z, - y, r, g, b );
					if ( array[ index + offsety ] === 0 || y === size.y - 1 ) add( ny, x, z, - y, r, g, b );
					if ( array[ index - offsety ] === 0 || y === 0 ) add( py, x, z, - y, r, g, b );
					if ( array[ index + offsetz ] === 0 || z === size.z - 1 ) add( pz, x, z, - y, r, g, b );
					if ( array[ index - offsetz ] === 0 || z === 0 ) add( nz, x, z, - y, r, g, b );

				}

				const geometry = new THREE.BufferGeometry();
				geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
				geometry.computeVertexNormals();

				if ( hasColors ) geometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );

				return geometry;

			}

			/*
			function displayPalette( palette ) {

				const canvas = document.createElement( 'canvas' );
				canvas.width = 8;
				canvas.height = 32;
				canvas.style.position = 'absolute';
				canvas.style.top = '0';
				canvas.style.width = '100px';
				canvas.style.imageRendering = 'pixelated';
				document.body.appendChild( canvas );

				const context = canvas.getContext( '2d' );

				for ( let c = 0; c < 256; c ++ ) {

					const x = c % 8;
					const y = Math.floor( c / 8 );

					const hex = palette[ c + 1 ];
					const r = hex >> 0 & 0xff;
					const g = hex >> 8 & 0xff;
					const b = hex >> 16 & 0xff;
					context.fillStyle = `rgba(${r},${g},${b},1)`;
					context.fillRect( x, 31 - y, 1, 1 );

				}

			}
			*/

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				requestAnimationFrame( animate );

				controls.update();

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>