@polygonjs/polygonjs/src/engine/operations/sop/FileSVG.ts

node-based WebGL 3D engine https://polygonjs.com

import {BaseSopOperation} from './_Base';
import {CoreGroup} from '../../../core/geometry/Group';
import {Mesh, BufferGeometry, Object3D} from 'three';
import {ASSETS_ROOT} from '../../../core/loader/AssetsUtils';
import {CoreSVGLoader} from '../../../core/loader/SVG';
import {DefaultOperationParams} from '../../../core/operations/_Base';
import {SopTypeFile} from '../../poly/registers/nodes/types/Sop';
import {sanitizeUrl} from '../../../core/UrlHelper';

interface SvgSopParams extends DefaultOperationParams {
	url: string;
	// fill
	drawFillShapes: boolean;
	fillShapesWireframe: boolean;
	// strokes
	drawStrokes: boolean;
	strokesWireframe: boolean;
	// style override
	tStyleOverride: boolean;
	strokeWidth: number;
	// advanced
	tadvanced: boolean;
	isCCW: boolean;
	// noHoles: boolean;
}

const DEFAULT_URL = sanitizeUrl(`${ASSETS_ROOT}/models/svg/tiger.svg`);
export class FileSVGSopOperation extends BaseSopOperation {
	static override readonly DEFAULT_PARAMS: SvgSopParams = {
		url: DEFAULT_URL,
		drawFillShapes: true,
		fillShapesWireframe: false,
		drawStrokes: true,
		strokesWireframe: false,
		tStyleOverride: false,
		strokeWidth: 1,
		tadvanced: false,
		isCCW: false,
		// noHoles: false,
	};
	static override type(): Readonly<SopTypeFile.FILE_SVG> {
		return SopTypeFile.FILE_SVG;
	}

	override async cook(input_contents: CoreGroup[], params: SvgSopParams): Promise<CoreGroup> {
		const loader = new CoreSVGLoader(params.url, this._node);

		try {
			const group = await loader.load(params);

			for (let child of group.children) {
				this._ensureGeometryHasIndex(child);
			}

			return this.createCoreGroupFromObjects([...group.children]);
		} catch (err) {
			this.states?.error.set(`fail to load SVG (${(err as Error).message})`);
			return this.createCoreGroupFromObjects([]);
		}
	}

	private _ensureGeometryHasIndex(object: Object3D) {
		const mesh = object as Mesh;
		const geometry = mesh.geometry;
		if (geometry) {
			this.createIndexIfNone(geometry as BufferGeometry);
		}
	}
}