284 lines
7.9 KiB
TypeScript
284 lines
7.9 KiB
TypeScript
"use client";
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import React, { Suspense, useEffect, useMemo } from "react";
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import { Canvas } from "@react-three/fiber";
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import { Environment, Grid, OrbitControls, useGLTF } from "@react-three/drei";
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import { AlertCircle, Box, ExternalLink, Loader2 } from "lucide-react";
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import { Button } from "@/components/ui/button";
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import type { Mesh, Object3D } from "three";
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export interface Model3DLayer {
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id: string;
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name: string;
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triangles: number;
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vertices: number;
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}
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export interface Model3DStats {
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triangles: number;
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vertices: number;
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meshCount: number;
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}
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export interface Model3DViewerSettings {
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envPreset:
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| "city"
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| "sunset"
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| "studio"
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| "dawn"
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| "night"
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| "warehouse"
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| "forest"
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| "apartment"
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| "park"
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| "lobby";
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lightIntensity: number;
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autoRotate: boolean;
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showGrid: boolean;
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wireframe: boolean;
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}
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interface Model3DViewerProps {
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modelUrl?: string | null;
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previewImageUrl?: string | null;
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settings: Model3DViewerSettings;
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layerVisibility?: Record<string, boolean>;
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onLayersChange?: (layers: Model3DLayer[]) => void;
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onStatsChange?: (stats: Model3DStats) => void;
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}
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class ViewerErrorBoundary extends React.Component<
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{ children: React.ReactNode; fallback: React.ReactNode },
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{ hasError: boolean }
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> {
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constructor(props: { children: React.ReactNode; fallback: React.ReactNode }) {
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super(props);
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this.state = { hasError: false };
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}
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static getDerivedStateFromError() {
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return { hasError: true };
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}
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componentDidUpdate(prevProps: { children: React.ReactNode }) {
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if (prevProps.children !== this.props.children && this.state.hasError) {
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this.setState({ hasError: false });
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}
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}
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render() {
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if (this.state.hasError) {
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return this.props.fallback;
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}
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return this.props.children;
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}
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}
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function isMesh(node: Object3D): node is Mesh {
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return (node as Mesh).isMesh === true;
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}
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function collectSceneMeta(scene: Object3D): {
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layers: Model3DLayer[];
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stats: Model3DStats;
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meshRefs: Array<{ layerId: string; mesh: Mesh }>;
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} {
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const layers: Model3DLayer[] = [];
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const meshRefs: Array<{ layerId: string; mesh: Mesh }> = [];
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let triangles = 0;
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let vertices = 0;
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let meshCount = 0;
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let meshIndex = 0;
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scene.traverse((node) => {
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if (!isMesh(node)) return;
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const geometry = node.geometry;
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if (!geometry) return;
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const id = `${node.name || "Mesh"}__${meshIndex}`;
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meshIndex += 1;
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const indexCount = geometry.index?.count || 0;
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const positionCount = geometry.attributes.position?.count || 0;
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const meshTriangles = indexCount > 0 ? Math.floor(indexCount / 3) : Math.floor(positionCount / 3);
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const meshVertices = positionCount;
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triangles += meshTriangles;
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vertices += meshVertices;
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meshCount += 1;
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layers.push({
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id,
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name: node.name?.trim() || `mesh_${meshCount}`,
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triangles: meshTriangles,
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vertices: meshVertices,
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});
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meshRefs.push({ layerId: id, mesh: node });
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});
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return {
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layers,
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stats: {
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triangles,
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vertices,
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meshCount,
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},
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meshRefs,
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};
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}
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function ModelScene({
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url,
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settings,
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layerVisibility,
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onLayersChange,
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onStatsChange,
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}: {
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url: string;
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settings: Model3DViewerSettings;
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layerVisibility?: Record<string, boolean>;
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onLayersChange?: (layers: Model3DLayer[]) => void;
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onStatsChange?: (stats: Model3DStats) => void;
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}) {
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const model = useGLTF(url);
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const scene = useMemo(() => model.scene.clone(), [model.scene]);
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const meta = useMemo(() => collectSceneMeta(scene), [scene]);
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useEffect(() => {
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onLayersChange?.(meta.layers);
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onStatsChange?.(meta.stats);
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}, [meta.layers, meta.stats, onLayersChange, onStatsChange]);
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useEffect(() => {
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for (const { layerId, mesh } of meta.meshRefs) {
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const nextVisible = layerVisibility?.[layerId];
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mesh.visible = nextVisible !== false;
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}
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}, [layerVisibility, meta.meshRefs]);
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useEffect(() => {
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for (const { mesh } of meta.meshRefs) {
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const materials = Array.isArray(mesh.material) ? mesh.material : [mesh.material];
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for (const material of materials) {
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if (!material) continue;
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if ("wireframe" in material) {
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(material as any).wireframe = settings.wireframe;
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material.needsUpdate = true;
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}
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}
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}
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}, [meta.meshRefs, settings.wireframe]);
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return <primitive object={scene} scale={1} />;
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}
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function isGlbOrGltf(url?: string | null) {
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const value = String(url || "").toLowerCase();
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return /\.(gltf|glb)(\?|#|$)/.test(value);
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}
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function EmptyState({ previewImageUrl }: { previewImageUrl?: string | null }) {
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return (
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<div className="flex h-full w-full flex-col items-center justify-center gap-3 bg-muted/20 p-4">
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{previewImageUrl ? (
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<img
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src={previewImageUrl}
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alt="3D 预览"
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className="max-h-[65%] max-w-full rounded-lg border object-contain"
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/>
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) : (
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<Box className="h-14 w-14 text-muted-foreground/60" />
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)}
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<p className="text-sm text-muted-foreground">生成完成后可在此区域预览 3D 资产</p>
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</div>
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);
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}
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export function Model3DViewer({
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modelUrl,
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previewImageUrl,
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settings,
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layerVisibility,
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onLayersChange,
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onStatsChange,
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}: Model3DViewerProps) {
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if (!modelUrl) {
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return <EmptyState previewImageUrl={previewImageUrl} />;
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}
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if (!isGlbOrGltf(modelUrl)) {
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return (
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<div className="flex h-full w-full flex-col items-center justify-center gap-3 bg-muted/20 p-4">
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<AlertCircle className="h-8 w-8 text-amber-500" />
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<p className="text-sm text-muted-foreground">
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当前文件格式不支持内嵌预览，请在新窗口打开
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</p>
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<Button asChild variant="secondary" className="gap-2">
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<a href={modelUrl} target="_blank" rel="noreferrer">
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<ExternalLink className="h-4 w-4" />
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打开3D文件
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</a>
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</Button>
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</div>
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);
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}
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return (
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<ViewerErrorBoundary
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fallback={
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<div className="flex h-full w-full flex-col items-center justify-center gap-3 bg-muted/20 p-4">
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<AlertCircle className="h-8 w-8 text-destructive" />
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<p className="text-sm text-muted-foreground">3D 预览加载失败，请尝试在新窗口打开</p>
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<Button asChild variant="secondary" className="gap-2">
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<a href={modelUrl} target="_blank" rel="noreferrer">
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<ExternalLink className="h-4 w-4" />
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打开3D文件
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</a>
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</Button>
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</div>
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}
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>
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<Canvas camera={{ position: [2, 1.5, 2], fov: 45 }}>
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<ambientLight intensity={0.5 * settings.lightIntensity} />
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<directionalLight position={[5, 8, 5]} intensity={1.2 * settings.lightIntensity} />
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{settings.showGrid ? (
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<Grid
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position={[0, -0.01, 0]}
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args={[12, 12]}
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cellColor="#8c8c8c"
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sectionColor="#525252"
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cellSize={0.5}
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sectionSize={2}
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fadeDistance={40}
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fadeStrength={1.5}
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/>
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) : null}
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<Suspense
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fallback={
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<mesh>
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<boxGeometry args={[0.6, 0.6, 0.6]} />
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<meshStandardMaterial color="#94a3b8" wireframe />
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</mesh>
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}
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>
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<ModelScene
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url={modelUrl}
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settings={settings}
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layerVisibility={layerVisibility}
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onLayersChange={onLayersChange}
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onStatsChange={onStatsChange}
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/>
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<Environment preset={settings.envPreset} />
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</Suspense>
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<OrbitControls enablePan enableZoom enableRotate autoRotate={settings.autoRotate} />
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</Canvas>
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<div className="pointer-events-none absolute left-3 top-3 rounded-md bg-background/80 px-2 py-1 text-xs text-muted-foreground">
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<span className="inline-flex items-center gap-1">
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<Loader2 className="h-3 w-3" />
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拖拽旋转 / 滚轮缩放
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</span>
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</div>
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</ViewerErrorBoundary>
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);
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}
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