import {
BufferGeometry,
Data3DTexture,
FileLoader,
Float32BufferAttribute,
Loader,
LinearFilter,
Mesh,
MeshStandardMaterial,
NearestFilter,
RedFormat
} from 'three';
class VOXLoader extends Loader {
load( url, onLoad, onProgress, onError ) {
const scope = this;
const loader = new FileLoader( scope.manager );
loader.setPath( scope.path );
loader.setResponseType( 'arraybuffer' );
loader.setRequestHeader( scope.requestHeader );
loader.load( url, function ( buffer ) {
try {
onLoad( scope.parse( buffer ) );
} catch ( e ) {
if ( onError ) {
onError( e );
} else {
console.error( e );
}
scope.manager.itemError( url );
}
}, onProgress, onError );
}
parse( buffer ) {
const data = new DataView( buffer );
const id = data.getUint32( 0, true );
const version = data.getUint32( 4, true );
if ( id !== 542658390 || version !== 150 ) {
console.error( 'Not a valid VOX file' );
return;
}
const DEFAULT_PALETTE = [
0x00000000, 0xffffffff, 0xffccffff, 0xff99ffff, 0xff66ffff, 0xff33ffff, 0xff00ffff, 0xffffccff,
0xffccccff, 0xff99ccff, 0xff66ccff, 0xff33ccff, 0xff00ccff, 0xffff99ff, 0xffcc99ff, 0xff9999ff,
0xff6699ff, 0xff3399ff, 0xff0099ff, 0xffff66ff, 0xffcc66ff, 0xff9966ff, 0xff6666ff, 0xff3366ff,
0xff0066ff, 0xffff33ff, 0xffcc33ff, 0xff9933ff, 0xff6633ff, 0xff3333ff, 0xff0033ff, 0xffff00ff,
0xffcc00ff, 0xff9900ff, 0xff6600ff, 0xff3300ff, 0xff0000ff, 0xffffffcc, 0xffccffcc, 0xff99ffcc,
0xff66ffcc, 0xff33ffcc, 0xff00ffcc, 0xffffcccc, 0xffcccccc, 0xff99cccc, 0xff66cccc, 0xff33cccc,
0xff00cccc, 0xffff99cc, 0xffcc99cc, 0xff9999cc, 0xff6699cc, 0xff3399cc, 0xff0099cc, 0xffff66cc,
0xffcc66cc, 0xff9966cc, 0xff6666cc, 0xff3366cc, 0xff0066cc, 0xffff33cc, 0xffcc33cc, 0xff9933cc,
0xff6633cc, 0xff3333cc, 0xff0033cc, 0xffff00cc, 0xffcc00cc, 0xff9900cc, 0xff6600cc, 0xff3300cc,
0xff0000cc, 0xffffff99, 0xffccff99, 0xff99ff99, 0xff66ff99, 0xff33ff99, 0xff00ff99, 0xffffcc99,
0xffcccc99, 0xff99cc99, 0xff66cc99, 0xff33cc99, 0xff00cc99, 0xffff9999, 0xffcc9999, 0xff999999,
0xff669999, 0xff339999, 0xff009999, 0xffff6699, 0xffcc6699, 0xff996699, 0xff666699, 0xff336699,
0xff006699, 0xffff3399, 0xffcc3399, 0xff993399, 0xff663399, 0xff333399, 0xff003399, 0xffff0099,
0xffcc0099, 0xff990099, 0xff660099, 0xff330099, 0xff000099, 0xffffff66, 0xffccff66, 0xff99ff66,
0xff66ff66, 0xff33ff66, 0xff00ff66, 0xffffcc66, 0xffcccc66, 0xff99cc66, 0xff66cc66, 0xff33cc66,
0xff00cc66, 0xffff9966, 0xffcc9966, 0xff999966, 0xff669966, 0xff339966, 0xff009966, 0xffff6666,
0xffcc6666, 0xff996666, 0xff666666, 0xff336666, 0xff006666, 0xffff3366, 0xffcc3366, 0xff993366,
0xff663366, 0xff333366, 0xff003366, 0xffff0066, 0xffcc0066, 0xff990066, 0xff660066, 0xff330066,
0xff000066, 0xffffff33, 0xffccff33, 0xff99ff33, 0xff66ff33, 0xff33ff33, 0xff00ff33, 0xffffcc33,
0xffcccc33, 0xff99cc33, 0xff66cc33, 0xff33cc33, 0xff00cc33, 0xffff9933, 0xffcc9933, 0xff999933,
0xff669933, 0xff339933, 0xff009933, 0xffff6633, 0xffcc6633, 0xff996633, 0xff666633, 0xff336633,
0xff006633, 0xffff3333, 0xffcc3333, 0xff993333, 0xff663333, 0xff333333, 0xff003333, 0xffff0033,
0xffcc0033, 0xff990033, 0xff660033, 0xff330033, 0xff000033, 0xffffff00, 0xffccff00, 0xff99ff00,
0xff66ff00, 0xff33ff00, 0xff00ff00, 0xffffcc00, 0xffcccc00, 0xff99cc00, 0xff66cc00, 0xff33cc00,
0xff00cc00, 0xffff9900, 0xffcc9900, 0xff999900, 0xff669900, 0xff339900, 0xff009900, 0xffff6600,
0xffcc6600, 0xff996600, 0xff666600, 0xff336600, 0xff006600, 0xffff3300, 0xffcc3300, 0xff993300,
0xff663300, 0xff333300, 0xff003300, 0xffff0000, 0xffcc0000, 0xff990000, 0xff660000, 0xff330000,
0xff0000ee, 0xff0000dd, 0xff0000bb, 0xff0000aa, 0xff000088, 0xff000077, 0xff000055, 0xff000044,
0xff000022, 0xff000011, 0xff00ee00, 0xff00dd00, 0xff00bb00, 0xff00aa00, 0xff008800, 0xff007700,
0xff005500, 0xff004400, 0xff002200, 0xff001100, 0xffee0000, 0xffdd0000, 0xffbb0000, 0xffaa0000,
0xff880000, 0xff770000, 0xff550000, 0xff440000, 0xff220000, 0xff110000, 0xffeeeeee, 0xffdddddd,
0xffbbbbbb, 0xffaaaaaa, 0xff888888, 0xff777777, 0xff555555, 0xff444444, 0xff222222, 0xff111111
];
let i = 8;
let chunk;
const chunks = [];
while ( i < data.byteLength ) {
let id = '';
for ( let j = 0; j < 4; j ++ ) {
id += String.fromCharCode( data.getUint8( i ++ ) );
}
const chunkSize = data.getUint32( i, true ); i += 4;
i += 4; // childChunks
if ( id === 'SIZE' ) {
const x = data.getUint32( i, true ); i += 4;
const y = data.getUint32( i, true ); i += 4;
const z = data.getUint32( i, true ); i += 4;
chunk = {
palette: DEFAULT_PALETTE,
size: { x: x, y: y, z: z },
};
chunks.push( chunk );
i += chunkSize - ( 3 * 4 );
} else if ( id === 'XYZI' ) {
const numVoxels = data.getUint32( i, true ); i += 4;
chunk.data = new Uint8Array( buffer, i, numVoxels * 4 );
i += numVoxels * 4;
} else if ( id === 'RGBA' ) {
const palette = [ 0 ];
for ( let j = 0; j < 256; j ++ ) {
palette[ j + 1 ] = data.getUint32( i, true ); i += 4;
}
chunk.palette = palette;
} else {
// console.log( id, chunkSize, childChunks );
i += chunkSize;
}
}
return chunks;
}
}
class VOXMesh extends Mesh {
constructor( chunk ) {
const data = chunk.data;
const size = chunk.size;
const palette = chunk.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 BufferGeometry();
geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
geometry.computeVertexNormals();
const material = new MeshStandardMaterial();
if ( hasColors ) {
geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
material.vertexColors = true;
}
super( geometry, material );
}
}
class VOXData3DTexture extends Data3DTexture {
constructor( chunk ) {
const data = chunk.data;
const size = chunk.size;
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;
}
super( array, size.x, size.y, size.z );
this.format = RedFormat;
this.minFilter = NearestFilter;
this.magFilter = LinearFilter;
this.unpackAlignment = 1;
this.needsUpdate = true;
}
}
export { VOXLoader, VOXMesh, VOXData3DTexture };
