如果我有一个在Cinema 4D中建模的网格，我如何将其导出为three.js 3D JS Engine？
此外，导出多边形选择的材质颜色会很方便。
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9
为此，刚刚为 Cinema4D 编写了另一个 python 脚本。
您可以在干扰媒体博客和wiki上找到详细信息。
作为参考，我在这里也列出了来源：
'''
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()
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
于 2010-11-29T16:48:20.507 回答
5
另一种选择是导出为 COLLADA/DAE 或 OBJ 并使用COLLADALoader或OBJLoader。
于 2012-05-31T20:40:52.887 回答
1
如果遇到对象属性错误，则需要在导出器脚本 (c4d13+)中交换GetPos调用。GetAbsPosthree.js
于 2013-02-18T08:41:20.707 回答