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three

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JavaScript 3D library

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import { Color, Matrix3, Matrix4, Vector2, Vector3, Vector4 } from 'three'; export function getCacheKey( object, force = false ) { let cacheKey = '{'; if ( object.isNode === true ) { cacheKey += object.id; } for ( const { property, childNode } of getNodeChildren( object ) ) { cacheKey += ',' + property.slice( 0, - 4 ) + ':' + childNode.getCacheKey( force ); } cacheKey += '}'; return cacheKey; } export function* getNodeChildren( node, toJSON = false ) { for ( const property in node ) { // Ignore private properties. if ( property.startsWith( '_' ) === true ) continue; const object = node[ property ]; if ( Array.isArray( object ) === true ) { for ( let i = 0; i < object.length; i ++ ) { const child = object[ i ]; if ( child && ( child.isNode === true || toJSON && typeof child.toJSON === 'function' ) ) { yield { property, index: i, childNode: child }; } } } else if ( object && object.isNode === true ) { yield { property, childNode: object }; } else if ( typeof object === 'object' ) { for ( const subProperty in object ) { const child = object[ subProperty ]; if ( child && ( child.isNode === true || toJSON && typeof child.toJSON === 'function' ) ) { yield { property, index: subProperty, childNode: child }; } } } } } export function getValueType( value ) { if ( value === undefined || value === null ) return null; const typeOf = typeof value; if ( value.isNode === true ) { return 'node'; } else if ( typeOf === 'number' ) { return 'float'; } else if ( typeOf === 'boolean' ) { return 'bool'; } else if ( typeOf === 'string' ) { return 'string'; } else if ( typeOf === 'function' ) { return 'shader'; } else if ( value.isVector2 === true ) { return 'vec2'; } else if ( value.isVector3 === true ) { return 'vec3'; } else if ( value.isVector4 === true ) { return 'vec4'; } else if ( value.isMatrix3 === true ) { return 'mat3'; } else if ( value.isMatrix4 === true ) { return 'mat4'; } else if ( value.isColor === true ) { return 'color'; } else if ( value instanceof ArrayBuffer ) { return 'ArrayBuffer'; } return null; } export function getValueFromType( type, ...params ) { const last4 = type ? type.slice( - 4 ) : undefined; if ( params.length === 1 ) { // ensure same behaviour as in NodeBuilder.format() if ( last4 === 'vec2' ) params = [ params[ 0 ], params[ 0 ] ]; else if ( last4 === 'vec3' ) params = [ params[ 0 ], params[ 0 ], params[ 0 ] ]; else if ( last4 === 'vec4' ) params = [ params[ 0 ], params[ 0 ], params[ 0 ], params[ 0 ] ]; } if ( type === 'color' ) { return new Color( ...params ); } else if ( last4 === 'vec2' ) { return new Vector2( ...params ); } else if ( last4 === 'vec3' ) { return new Vector3( ...params ); } else if ( last4 === 'vec4' ) { return new Vector4( ...params ); } else if ( last4 === 'mat3' ) { return new Matrix3( ...params ); } else if ( last4 === 'mat4' ) { return new Matrix4( ...params ); } else if ( type === 'bool' ) { return params[ 0 ] || false; } else if ( ( type === 'float' ) || ( type === 'int' ) || ( type === 'uint' ) ) { return params[ 0 ] || 0; } else if ( type === 'string' ) { return params[ 0 ] || ''; } else if ( type === 'ArrayBuffer' ) { return base64ToArrayBuffer( params[ 0 ] ); } return null; } export function arrayBufferToBase64( arrayBuffer ) { let chars = ''; const array = new Uint8Array( arrayBuffer ); for ( let i = 0; i < array.length; i ++ ) { chars += String.fromCharCode( array[ i ] ); } return btoa( chars ); } export function base64ToArrayBuffer( base64 ) { return Uint8Array.from( atob( base64 ), c => c.charCodeAt( 0 ) ).buffer; }