Extracting UV map from multipass render

Helper

On 10/02/2014 at 05:31, xxxxxxxx wrote:

Using Cinema R15 on OSX; I am trying to using the python API extract a UV map from a mulipass-render.

This can be done none programatically by going into [ render -> edit render settings ] then enabling multipass and then adding and enabling 'Material UVW'

The problem is that can't get this to reliably work programatically. Below is the code I trying:

def test(doc) :
    #creates a new render data object	
    rd1=c4d.documents.RenderData()
    #add multipass
    vuvw=c4d.BaseList2D(c4d.Zmultipass) 
    vuvw.GetDataInstance()[c4d.MULTIPASSOBJECT_TYPE] = c4d.VPBUFFER_MAT_UV 
    rd1.InsertMultipass(vuvw)
    rd=rd1.GetDataInstance()	
    rd[c4d.RDATA_MULTIPASS_ENABLE]=True
    #det dimensions
    xres=800
    yres=800
    rd[c4d.RDATA_XRES]=float(xres)
    rd[c4d.RDATA_YRES]=float(yres)
    #set output
    bmp = c4d.bitmaps.MultipassBitmap(xres, yres, c4d.COLORMODE_RGBw)
    res = c4d.documents.RenderDocument(doc, rd, bmp)
    if res!=c4d.RENDERRESULT_OK:
        print 'Render Failed!!!'
        return False
    else:
        print 'Render Success!!!'
    #print layer names
    for i in range(bmp.GetLayerCount()) :
        print bmp.GetLayerNum(i).GetParameter(c4d.MPBTYPE_NAME)

This code just prints out 'Background' instead of Background and 'Material UV'. (This is confirmed by writing the layers out to a file).

I am not really sure what I am doing wrong, of course please ask if there is any additional information I can provide.
Thanks for any help in advance!

Helper

On 10/02/2014 at 11:03, xxxxxxxx wrote:

Give this one a try:

#This script creates a new render preset and sets it to create an RGB & Material UV pass image to your desktop  
#IMPORTANT!!: Make sure you rememebr to add a matrerial to your objects or the Material UV image will be black!!  
  
import c4d, os  
from c4d import bitmaps, documents  
def main() :  
    
  firstRd = doc.GetFirstRenderData()  
  if not firstRd: return False  
    
  #If our custom render settings already exhist  
  #Use it..Don't create another one  
  if firstRd.GetName() == "Material UV pass":          
      xres = 800  
      yres = 800  
      firstRd[c4d.RDATA_XRES] = float(xres)  
      firstRd[c4d.RDATA_YRES] = float(yres)          
      bmp = bitmaps.BaseBitmap()  
      bmp.Init(int(xres), int(yres), firstRd[c4d.RDATA_FORMATDEPTH])  
      data = doc.GetActiveRenderData().GetData()  
      res = documents.RenderDocument(doc, data, bmp, c4d.RENDERFLAGS_EXTERNAL)  
  
      if res!=c4d.RENDERRESULT_OK:  
          print 'Render Failed!!!'  
          return False  
      else:  
          print 'Render Success!!!'          
        
  #If our custom render settings don't already exhist  
  #Create it first..then render the images  
  else:         
    
      myRd = c4d.documents.RenderData()  
      myRd.SetName("Material UV pass")  
      doc.InsertRenderData(myRd)      
      doc.SetActiveRenderData(myRd)  
  
      xres = 800  
      yres = 800  
      myRd[c4d.RDATA_XRES] = float(xres)  
      myRd[c4d.RDATA_YRES] = float(yres)  
    
      fn = c4d.storage.GeGetC4DPath(c4d.C4D_PATH_DESKTOP)  
      path = os.path.join(fn,'render')      
      myRd[c4d.RDATA_PATH] = path  
    
      #Enable the Multi-Pass option  
      myRd[c4d.RDATA_MULTIPASS_ENABLE]=True  
    
      #Assign the passes container list of options to a variable  
      uvPass = c4d.BaseList2D(c4d.Zmultipass)      
    
      #Get the Material UV pass option      
      uvPass.GetDataInstance()[c4d.MULTIPASSOBJECT_TYPE] = c4d.VPBUFFER_MAT_UV  
    
      #Add the Material UV pass option to the render settings dialog  
      myRd.InsertMultipass(uvPass)  
    
      #Enable the Save Multi-Pass Image option  
      myRd[c4d.RDATA_MULTIPASS_SAVEIMAGE]=True  
  
      #Set the file path where to put the Material UV pass image  
      fn = c4d.storage.GeGetC4DPath(c4d.C4D_PATH_DESKTOP)  
      path = os.path.join(fn,'uv')   
      myRd[c4d.RDATA_MULTIPASS_FILENAME] = path  
  
  
      #Set the output format to .png  
      myRd[c4d.RDATA_MULTIPASS_SAVEFORMAT] = c4d.FILTER_PNG  
      bmp = bitmaps.BaseBitmap()  
      bmp.Init(int(xres), int(yres), myRd[c4d.RDATA_FORMATDEPTH])  
  
      data = doc.GetActiveRenderData().GetData()  
      res = documents.RenderDocument(doc, data, bmp, c4d.RENDERFLAGS_EXTERNAL)  
  
      if res!=c4d.RENDERRESULT_OK:  
          print 'Render Failed!!!'  
          return False  
      else:  
          print 'Render Success!!!'  
  
    
  c4d.EventAdd()  
  
if __name__=='__main__':  
  main()

-ScottA

Helper

On 10/02/2014 at 15:20, xxxxxxxx wrote:

Thanks, I'll give it a go in the morning and report back!