用途
@json-render/react-three-fiber 是 json-render 的 React Three Fiber 渲染器,用于把 JSON 规格(spec)渲染成 3D 场景。它内置 19 个 3D 组件,适合在 React 应用中用声明式 JSON 描述并动态生成三维内容。
两个入口点
该包提供两个入口,用途不同:
- @json-render/react-three-fiber/catalog:导出 threeComponentDefinitions,即 catalog schema。不依赖 R3F,可安全用于服务端。
- @json-render/react-three-fiber:导出 threeComponents、ThreeRenderer、ThreeCanvas、schemas,即 R3F 实现与渲染器。
使用方式
基本模式是先从标准定义中挑选需要的 3D 组件构建 catalog,再挑选匹配的实现构建 registry。示例:
import { defineCatalog } from "@json-render/core";
import { schema } from "@json-render/react/schema";
import { threeComponentDefinitions } from "@json-render/react-three-fiber/catalog";
import { defineRegistry } from "@json-render/react";
import { threeComponents, ThreeCanvas } from "@json-render/react-three-fiber";
// Catalog: pick definitions
const catalog = defineCatalog(schema, {
components: {
Box: threeComponentDefinitions.Box,
Sphere: threeComponentDefinitions.Sphere,
AmbientLight: threeComponentDefinitions.AmbientLight,
DirectionalLight: threeComponentDefinitions.DirectionalLight,
OrbitControls: threeComponentDefinitions.OrbitControls,
},
actions: {},
});
// Registry: pick matching implementations
const { registry } = defineRegistry(catalog, {
components: {
Box: threeComponents.Box,
Sphere: threeComponents.Sphere,
AmbientLight: threeComponents.AmbientLight,
DirectionalLight: threeComponents.DirectionalLight,
OrbitControls: threeComponents.OrbitControls,
},
});
渲染有两种方式。使用 ThreeCanvas 便捷包装:
<ThreeCanvas
spec={spec}
registry={registry}
shadows
camera={{ position: [5, 5, 5], fov: 50 }}
style={{ width: "100%", height: "100vh" }}
/>
或手动设置 Canvas:
import { Canvas } from "@react-three/fiber";
import { ThreeRenderer } from "@json-render/react-three-fiber";
<Canvas shadows>
<ThreeRenderer spec={spec} registry={registry}>
{/* Additional R3F elements */}
</ThreeRenderer>
</Canvas>
内置组件(19 个)
几何体(7 个):
- Box:width、height、depth、material
- Sphere:radius、widthSegments、heightSegments、material
- Cylinder:radiusTop、radiusBottom、height、material
- Cone:radius、height、material
- Torus:radius、tube、material
- Plane:width、height、material
- Capsule:radius、length、material
所有几何体共享:position、rotation、scale、castShadow、receiveShadow、material。
灯光(4 个):
- AmbientLight:color、intensity
- DirectionalLight:position、color、intensity、castShadow
- PointLight:position、color、intensity、distance、decay
- SpotLight:position、color、intensity、angle、penumbra
其他(8 个):
- Group:容器,支持 position/rotation/scale,可包含子元素
- Model:通过 url 属性加载 GLTF/GLB
- Environment:HDRI 环境贴图(preset、background、blur、intensity)
- Fog:线性雾(color、near、far)
- GridHelper:参考网格(size、divisions、color)
- Text3D:SDF 文字(text、fontSize、color、anchorX、anchorY)
- PerspectiveCamera:相机(position、fov、near、far、makeDefault)
- OrbitControls:轨道控制(enableDamping、enableZoom、autoRotate)
共享 Schema
提供可复用的 Zod schema,用于自定义 3D catalog 定义:
import { vector3Schema, materialSchema, transformProps, shadowProps } from "@json-render/react-three-fiber";
import { z } from "zod";
// Custom 3D component
const myComponentDef = {
props: z.object({
...transformProps,
...shadowProps,
material: materialSchema.nullable(),
myCustomProp: z.string(),
}),
description: "My custom 3D component",
};
材质 schema 定义:
materialSchema = z.object({
color: z.string().nullable(), // default "#ffffff"
metalness: z.number().nullable(), // default 0
roughness: z.number().nullable(), // default 1
emissive: z.string().nullable(), // default "#000000"
emissiveIntensity: z.number().nullable(), // default 1
opacity: z.number().nullable(), // default 1
transparent: z.boolean().nullable(), // default false
wireframe: z.boolean().nullable(), // default false
});
Spec 格式
3D spec 使用标准 json-render 扁平元素格式:
{
"root": "scene",
"elements": {
"scene": {
"type": "Group",
"props": { "position": [0, 0, 0] },
"children": ["light", "box"]
},
"light": {
"type": "AmbientLight",
"props": { "intensity": 0.5 },
"children": []
},
"box": {
"type": "Box",
"props": {
"position": [0, 0.5, 0],
"material": { "color": "#4488ff", "metalness": 0.3, "roughness": 0.7 }
},
"children": []
}
}
}
依赖
需要以下 peer 依赖:
- @react-three/fiber >= 8.0.0
- @react-three/drei >= 9.0.0
- three >= 0.160.0
- react ^19.0.0
- zod ^4.0.0
适用场景与限制
适用于需要在 React 中通过 JSON 规格动态构建 3D 场景的项目,例如由数据驱动生成三维可视化或交互式 3D 内容。catalog 入口不依赖 R3F,可在服务端安全使用,便于服务端生成或校验组件定义。限制方面:资料未提供收费、价格、平台支持范围、性能表现或具体使用步骤之外的额外说明,暂未提供相关信息。