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zh
2025-07-03 15:12:58 +08:00
parent 17d900dcf9
commit fd55e022ae
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/**
* Text = 3D Text
*
* parameters = {
* font: <THREE.Font>, // font
*
* size: <float>, // size of the text
* depth: <float>, // thickness to extrude text
* curveSegments: <int>, // number of points on the curves
*
* bevelEnabled: <bool>, // turn on bevel
* bevelThickness: <float>, // how deep into text bevel goes
* bevelSize: <float>, // how far from text outline (including bevelOffset) is bevel
* bevelOffset: <float> // how far from text outline does bevel start
* }
*/
import {
ExtrudeGeometry
} from '../../three.module.min.js';
class TextGeometry extends ExtrudeGeometry {
constructor( text, parameters = {} ) {
const font = parameters.font;
if ( font === undefined ) {
super(); // generate default extrude geometry
} else {
const shapes = font.generateShapes( text, parameters.size );
// translate parameters to ExtrudeGeometry API
if ( parameters.depth === undefined && parameters.height !== undefined ) {
console.warn( 'THREE.TextGeometry: .height is now depreciated. Please use .depth instead' ); // @deprecated, r163
}
parameters.depth = parameters.depth !== undefined ?
parameters.depth : parameters.height !== undefined ?
parameters.height : 50;
// defaults
if ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;
if ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;
if ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;
super( shapes, parameters );
}
this.type = 'TextGeometry';
}
}
export { TextGeometry };

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import {
FileLoader,
Loader,
ShapePath
} from '../../three.module.min.js';
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 };

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