javascript 如何将 Cinema4D 中的 3d 模型导出到three.js？

How do you export a 3d model from Cinema4D to three.js?

提问by George Profenza

If I have a mesh modeled in Cinema 4D, how can I export it for the three.js3D JS Engine ?

如果我有一个在Cinema 4D 中建模的网格，我如何将它导出到Three.js3D JS 引擎？

Also, it would be handy to export material colorsfor polygon selections.

此外，这将是很方便的导出材料颜色的多边形选择。

回答by George Profenza

Just wrote another python script for Cinema4D for this.

为此，刚刚为 Cinema4D 编写了另一个 python 脚本。

You can find details on the disturb media blogand wiki.

您可以在干扰媒体博客和wiki上找到详细信息。

For reference, I'm listing the source here too:

作为参考，我也在此处列出了来源：

'''
author : "George Profenza"
url    : ("disturb", "disturbmedia.com/blog","My blog, http://tomaterial.blogspot.com")

Export meshes the three.js 3D Engine by mr.doob's et al.

More details on the engine here:
https://github.com/mrdoob/three.js

Currently supports UVs. If the model doesn't display correctly
you might need to reverse some normals/do some cleanup.
Also, if you use Selection Tags and basic ColorMaterials, 
the colours will be picked up as face colors. Call autoColor() on the
model you use for this.
The mesh transformations(position, rotation, scale) are saved
and you can get them using: getPosition(), getRotation() and getScale()
each returning a THREE.Vector3

In short
var myGeom = new myC4DGeom();
var myModel = new THREE.Mesh( myGeom, new THREE.MeshFaceMaterial());
//set transforms
model.position = myGeom.getPosition()
model.rotation = myGeom.getRotation()
model.scale    = myGeom.getScale()
//set selection tags colours
myGeom.autoColor()

More details on this exporter and more js examples here:
https://github.com/orgicus/three.js

Have fun!

This script requires Cinema 4D R11.5 minimum and the Py4D Plugin:
http://www.py4d.com/get-py4d/
'''

import c4d
from c4d import documents,UVWTag,storage
from c4d.utils import *
from c4d import symbols as sy, plugins, utils, bitmaps, gui
import math
import re

# utils
clean = lambda varStr: re.sub('\W|^(?=\d)','_', varStr)
# from Active State's Python recipies: http://code.activestate.com/recipes/266466-html-colors-tofrom-rgb-tuples/
def RGBToHTMLColor(rgb_tuple):
    return '0x%02x%02x%02x' % rgb_tuple
def Export():
    if not op: return
    if op.GetType() != 5100:
            print 'Selected Object is not an editable mesh'
            return
    unit = 0.001#for scale
    fps   = doc.GetFps()
    bd = doc.GetRenderBaseDraw()
    scr = bd.GetFrameScreen()
    rd = doc.GetActiveRenderData()
    name  = op.GetName()
    classname = clean(name)

    c4dPath = c4d.storage.GeGetC4DPath(sy.C4D_PATH_LIBRARY)
    jsFile = open(c4dPath+'/scripts/Three.js','r')
    js = jsFile.read()
    htmlFile = open(c4dPath+'/scripts/template.html','r')
    html = htmlFile.read()
    html = html.replace('%s',classname)
    code  = 'var %s = function () {\n\n\tvar scope = this;\n\n\tTHREE.Geometry.call(this);\n\n' % classname

    def GetMesh(code):
        # goto 0
        doc.SetTime(c4d.BaseTime(0, fps))
        c4d.DrawViews( c4d.DA_ONLY_ACTIVE_VIEW|c4d.DA_NO_THREAD|c4d.DA_NO_REDUCTION|c4d.DA_STATICBREAK )
        c4d.GeSyncMessage(c4d.EVMSG_TIMECHANGED)
        doc.SetTime(doc.GetTime())
        c4d.EventAdd(c4d.EVENT_ANIMATE)
        SendModelingCommand(command = MCOMMAND_REVERSENORMALS, list = [op], mode = MODIFY_ALL, bc = c4d.BaseContainer(), doc = doc)

        verts = op.GetPointAll()
        for v in verts:
            code += '\tv( %.6f, %.6f, %.6f );\n' % (v.x, -v.y, v.z)
        code += '\n'
        ncount = 0
        uvcount = 0
        faces = op.GetAllPolygons()
        normals = op.CreatePhongNormals()
        ndirection = 1
        hasUV = False
        for tag in op.GetTags():
            if tag.GetName() == "UVW":
                uvw = tag
                hasUV = True
        for f in faces:
            if(f.d == f.c):
                if(normals):
                    code += '\tf3( %d, %d, %d, %.6f, %.6f, %.6f );\n' % (f.a, f.b, f.c, normals[ncount].x*ndirection, normals[ncount].y*ndirection, normals[ncount].z*ndirection)
                else:
                    code += '\tf3( %d, %d, %d );\n' % (f.a, f.b, f.c)
            else:
                if(normals):
                    code += '\tf4( %d, %d, %d, %d, %.6f, %.6f, %.6f );\n' % (f.a, f.b, f.c, f.d, normals[ncount].x*ndirection, normals[ncount].y*ndirection, normals[ncount].z*ndirection)
                else:
                    code += '\tf4( %d, %d, %d, %d );\n' % (f.a, f.b, f.c, f.d)
            if hasUV:
                uv = uvw.Get(uvcount);
                # uvs  += '[Vector('+str(uv[0].x)+','+str(1.0-uv[0].y)+'),Vector('+str(uv[1].x)+','+str(1.0-uv[1].y)+'),Vector('+str(uv[2].x)+','+str(1.0-uv[2].y)+')],'
                if len(uv) == 4:
                    code += '\tuv( %.6f, %.6f, %.6f, %.6f, %.6f, %.6f, %.6f, %.6f);\n' % (uv[0].x, uv[0].y, uv[1].x, uv[1].y, uv[2].x, uv[2].y, uv[3].x, uv[3].y)
                else:
                    code += '\tuv( %.6f, %.6f, %.6f, %.6f, %.6f, %.6f);\n' % (uv[0].x, uv[0].y, uv[1].x, uv[1].y, uv[2].x, uv[2].y)
                ncount += 1
                uvcount += 1

        #selection color
        code +='\n\tscope.colors = {};\n'
        code +='\tscope.selections = {};\n'
        selName = ''
        for tag in op.GetTags():  
            if(tag.GetType() == 5616): #texture tag
               material = tag.GetMaterial()
               color = material[sy.MATERIAL_COLOR_COLOR]
               tag.SetBit(c4d.BIT_ACTIVE)
               selName = clean(tag[sy.TEXTURETAG_RESTRICTION])
               if len(selName) == 0:    print "*** WARNING! *** Missing selection name for material: " + material.GetName()
               code += '\tscope.colors["'+selName+'"] = '+str(RGBToHTMLColor((color.x*255,color.y*255,color.z*255)))+';\n'
            if tag.GetType() == 5673:  #selection tag
               # print 'selection: ' + tag.GetName()  
               sel = tag.GetSelection()
               selName = clean(tag.GetName())
               ids = sel.GetAll(op.GetPointCount())
               indices = [i for i, e in enumerate(ids) if e != 0]
               code += '\tscope.selections["'+selName+'"] = '+str(indices)+';\n'

        code += '\n\tscope.autoColor = function(){\n'
        code += '\t\tfor(var s in this.selections){\n'
        code += '\t\t\tfor(var i = 0 ; i < this.selections[s].length; i++) this.faces[this.selections[s][i]].material = [ new THREE.MeshColorFillMaterial( this.colors[s],1) ];\n'
        code += '\t\t}\n\t}\n'

        # model position, rotation, scale               rotation x,y,z = H,P,B => three.js x,y,z is P,H,B => y,x,z
        p = op.GetPos()
        r = op.GetRot()
        s = op.GetScale()
        code += '\n\tscope.getPosition = function(){\treturn new THREE.Vector3'+str((p.x,p.y,p.z))+';\t}\n'
        code += '\n\tscope.getRotation = function(){\treturn new THREE.Vector3'+str((r.y,r.x,r.z))+';\t}\n'
        code += '\n\tscope.getScale = function(){\treturn new THREE.Vector3'+str((s.x,s.y,s.z))+';\t}\n'

        code += '\n'
        code += '\tfunction v( x, y, z ) {\n\n'
        code += '\t\tscope.vertices.push( new THREE.Vertex( new THREE.Vector3( x, y, z ) ) );\n\n'
        code += '\t}\n\n'
        code += '\tfunction f3( a, b, c, nx, ny, nz ) {\n\n'
        code += '\t\tscope.faces.push( new THREE.Face3( a, b, c, nx && ny && nz ? new THREE.Vector3( nx, ny, nz ) : null ) );\n\n'
        code += '\t}\n\n'
        code += '\tfunction f4( a, b, c, d, nx, ny, nz ) {\n\n'
        code += '\t\tscope.faces.push( new THREE.Face4( a, b, c, d, nx && ny && nz ? new THREE.Vector3( nx, ny, nz ) : null ) );\n\n'
        code += '\t}\n\n'
        code += '\tfunction uv( u1, v1, u2, v2, u3, v3, u4, v4 ) {\n\n'
        code += '\t\tvar uv = [];\n'
        code += '\t\tuv.push( new THREE.UV( u1, v1 ) );\n'
        code += '\t\tuv.push( new THREE.UV( u2, v2 ) );\n'
        code += '\t\tuv.push( new THREE.UV( u3, v3 ) );\n'
        code += '\t\tif ( u4 && v4 ) uv.push( new THREE.UV( u4, v4 ) );\n'
        code += '\t\tscope.uvs.push( uv );\n'
        code += '\t}\n\n'
        code += '}\n\n'
        code += '%s.prototype = new THREE.Geometry();\n' % classname
        code += '%s.prototype.constructor = %s;' % (classname, classname)

        SendModelingCommand(command = MCOMMAND_REVERSENORMALS, list = [op], mode = MODIFY_ALL, bc = c4d.BaseContainer(), doc = doc)

        return code

    code = GetMesh(code)
    docPath = doc.GetDocumentPath() 
    jspath = docPath+'/'+classname+'.js'
    htmlpath = docPath+'/'+classname+'.html'
    file = open(jspath,'w')
    file.write(code)
    file.close()
    file = open(htmlpath,'w')
    file.write(html)
    file.close()
    file = open(docPath+'/Three.js','w')
    file.write(js)
    file.close()
    print 'Export Complete!'

Export()

Also, added 'slim' exporters to the repositorywhich should produce smaller .js files for the models

此外，在存储库中添加了“slim”导出器，它应该为模型生成更小的 .js 文件

回答by mrdoob

Another option is to export as COLLADA/DAE or OBJ and use COLLADALoaderor OBJLoader.

另一种选择是导出为 COLLADA/DAE 或 OBJ 并使用COLLADALoader或OBJLoader。

回答by flyingoctopus

Alirght, going to Try this here:

好吧，去试试这个：

This plugin does not work with C4D R12. Since Maxon absorbed Py4D, they made a choice to absorb the symbols object into the c4d object. I forked your codeand poked around a bit to try and fix the minute differences between 11.5's Py4D and R12.

此插件不适用于 C4D R12。由于 Maxon 吸收了 Py4D，他们做出了将符号对象吸收到 c4d 对象中的选择。我分叉了你的代码，并尝试修复了 11.5 的 Py4D 和 R12 之间的微小差异。

Anyways, here's the plugin cafe postyou made where I commented a bit more regarding the issues. Thanks again for paving the way for awesomeness!

无论如何，这是您制作的插件咖啡馆帖子，我在其中对这些问题发表了更多评论。再次感谢您为精彩铺平了道路！

回答by julian williams

If you get an object attribute error, you need to exchange the GetPoscall with GetAbsPosin the three.jsexporter script (c4d13+).

如果你得到一个对象属性错误，你需要交换GetPos与呼叫GetAbsPos在three.js出口脚本（c4d13 +）。