184 lines
3.1 KiB
JavaScript
184 lines
3.1 KiB
JavaScript
import {
|
|
FileLoader,
|
|
Loader,
|
|
ShapePath
|
|
} from 'three';
|
|
|
|
class FontLoader extends Loader {
|
|
|
|
constructor( manager ) {
|
|
|
|
super( manager );
|
|
|
|
}
|
|
|
|
load( url, onLoad, onProgress, onError ) {
|
|
|
|
const scope = this;
|
|
|
|
const loader = new FileLoader( this.manager );
|
|
loader.setPath( this.path );
|
|
loader.setRequestHeader( this.requestHeader );
|
|
loader.setWithCredentials( this.withCredentials );
|
|
loader.load( url, function ( text ) {
|
|
|
|
const font = scope.parse( JSON.parse( text ) );
|
|
|
|
if ( onLoad ) onLoad( font );
|
|
|
|
}, onProgress, onError );
|
|
|
|
}
|
|
|
|
parse( json ) {
|
|
|
|
return new Font( json );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
|
|
class Font {
|
|
|
|
constructor( data ) {
|
|
|
|
this.isFont = true;
|
|
|
|
this.type = 'Font';
|
|
|
|
this.data = data;
|
|
|
|
}
|
|
|
|
generateShapes( text, size = 100 ) {
|
|
|
|
const shapes = [];
|
|
const paths = createPaths( text, size, this.data );
|
|
|
|
for ( let p = 0, pl = paths.length; p < pl; p ++ ) {
|
|
|
|
shapes.push( ...paths[ p ].toShapes() );
|
|
|
|
}
|
|
|
|
return shapes;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function createPaths( text, size, data ) {
|
|
|
|
const chars = Array.from( text );
|
|
const scale = size / data.resolution;
|
|
const line_height = ( data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness ) * scale;
|
|
|
|
const paths = [];
|
|
|
|
let offsetX = 0, offsetY = 0;
|
|
|
|
for ( let i = 0; i < chars.length; i ++ ) {
|
|
|
|
const char = chars[ i ];
|
|
|
|
if ( char === '\n' ) {
|
|
|
|
offsetX = 0;
|
|
offsetY -= line_height;
|
|
|
|
} else {
|
|
|
|
const ret = createPath( char, scale, offsetX, offsetY, data );
|
|
offsetX += ret.offsetX;
|
|
paths.push( ret.path );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return paths;
|
|
|
|
}
|
|
|
|
function createPath( char, scale, offsetX, offsetY, data ) {
|
|
|
|
const glyph = data.glyphs[ char ] || data.glyphs[ '?' ];
|
|
|
|
if ( ! glyph ) {
|
|
|
|
console.error( 'THREE.Font: character "' + char + '" does not exists in font family ' + data.familyName + '.' );
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
const path = new ShapePath();
|
|
|
|
let x, y, cpx, cpy, cpx1, cpy1, cpx2, cpy2;
|
|
|
|
if ( glyph.o ) {
|
|
|
|
const outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );
|
|
|
|
for ( let i = 0, l = outline.length; i < l; ) {
|
|
|
|
const action = outline[ i ++ ];
|
|
|
|
switch ( action ) {
|
|
|
|
case 'm': // moveTo
|
|
|
|
x = outline[ i ++ ] * scale + offsetX;
|
|
y = outline[ i ++ ] * scale + offsetY;
|
|
|
|
path.moveTo( x, y );
|
|
|
|
break;
|
|
|
|
case 'l': // lineTo
|
|
|
|
x = outline[ i ++ ] * scale + offsetX;
|
|
y = outline[ i ++ ] * scale + offsetY;
|
|
|
|
path.lineTo( x, y );
|
|
|
|
break;
|
|
|
|
case 'q': // quadraticCurveTo
|
|
|
|
cpx = outline[ i ++ ] * scale + offsetX;
|
|
cpy = outline[ i ++ ] * scale + offsetY;
|
|
cpx1 = outline[ i ++ ] * scale + offsetX;
|
|
cpy1 = outline[ i ++ ] * scale + offsetY;
|
|
|
|
path.quadraticCurveTo( cpx1, cpy1, cpx, cpy );
|
|
|
|
break;
|
|
|
|
case 'b': // bezierCurveTo
|
|
|
|
cpx = outline[ i ++ ] * scale + offsetX;
|
|
cpy = outline[ i ++ ] * scale + offsetY;
|
|
cpx1 = outline[ i ++ ] * scale + offsetX;
|
|
cpy1 = outline[ i ++ ] * scale + offsetY;
|
|
cpx2 = outline[ i ++ ] * scale + offsetX;
|
|
cpy2 = outline[ i ++ ] * scale + offsetY;
|
|
|
|
path.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return { offsetX: glyph.ha * scale, path: path };
|
|
|
|
}
|
|
|
|
export { FontLoader, Font };
|