如何在node.js中渲染three.js？ [英] How do I render three.js in node.js?

问题描述

如何在node.js中渲染three.js代码？

How do I render three.js code in node.js?

我想从blender导出，然后通过 fs 并渲染一个场景。

I'd like to export from blender, then open the export through fs and render a scene with it.

推荐答案

要记住的关键部分是创建几何的部分，其他一切都很简单。我主要是把这里提供给我自己的参考，但它的工作，它很酷，在nodejs有3d渲染。哦，它需要画布来工作。

This is kind of a smelly implementation, but the key parts to remember are the part where the geometry is created, everything else is pretty straightforward. I'm mostly putting this here for my own reference later, but it does work and it's cool to have 3d rendering in nodejs. oh yea it requires canvas to work too.

它依赖于 three.js npm模块
https://github.com/uniba/node-three.js

it relies on three.js npm module https://github.com/uniba/node-three.js

fs = require("fs")

THREE = require("three.js")
join = require("path").join

app.get '/test/top_:top_id/side_:side_id/x_:x/y_:y.jpg', (req, res, next) =>

  width = 660
  height = 500

  camera = new THREE.PerspectiveCamera(50, width / height, 1, 1000)
  scene = new THREE.Scene()
  renderer = new THREE.CanvasRenderer( )
  renderer.setSize width, height

  camera.position.z = 100

  camera_container = new THREE.Object3D
  scene.add camera_container
  camera_container.add camera

  camera.position.z = 75

  # We have one background plane
  plane_image = new Image
  plane_image.src = fs.readFileSync TOP_DIR + "public/images/vtx_logo.jpg"
  texture = new THREE.Texture plane_image, new THREE.UVMapping()
  texture.needsUpdate = true

  loader = new THREE.JSONLoader()

  geometry = new THREE.PlaneGeometry(200, 200)
  material = new THREE.MeshBasicMaterial
    color       : 0x698144
    #shading        : THREE.SmoothShading
    map     : texture
    overdraw: true
  plane = new THREE.Mesh geometry, material
  plane.position.z = -50
  plane.position.y = -4
  plane.position.x = 4.5

  # We also have an object in the foreground
  scene.add plane
  geometry = false
  loader.createModel JSON.parse(fs.readFileSync(TOP_DIR + 'public/blender_export.json')), (done) =>
    geometry = done

  # Imager.texture gives us a canvas based on some code that grabs specific info
  texture = new THREE.Texture (Imager.texture req.params.side_id, req.params.top_id), new THREE.UVMapping()
  texture.needsUpdate = true

  material = new THREE.MeshBasicMaterial
    color: 0xaaaaaa
    map: texture
    overdraw: true
  mesh = new THREE.Mesh geometry, material

  mesh.rotation.x = parseFloat req.params.x
  mesh.rotation.y = parseFloat req.params.y

  scene.add mesh
  mesh.dynamic = true
  renderer.render scene, camera

  renderer.domElement.toBuffer (err, buf) ->
    res.contentType 'image/jpg'
    res.send buf

您会收到错误找不到./lib/Three ：

three.js 模块我提到可能指向内部的三个旧版本。我记得必须进入模块并编辑一个文件 require（'./ lib / Three'）到 require（'./ lib /三'）。我想他在package.json中包含了一个非特定的三个，所以它更新没有他的npm模块更新..可以修复

The three.js module I mentioned might point to an old version of three internally. I remember having to go into the module and edit a file that require('./lib/Three') to require('./lib/three'). I guess he included a non specific three in his package.json, so it got updated without his npm module being updated.. could be fixed by now

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