Set Texture by script

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On 26/10/2011 at 01:58, xxxxxxxx wrote:

Is there any chance to change the texture file by script? I import models from a 3D-Scanner. On import there are texture groups but noe texture file is assigned.
The groups are named "texture_group_0", "texture_group_1" ...
The texture files are named "texture_0", "texture_1"...
If I set the texture_0 to texture_group_0 and so on it's ok. But there are many texture_groups. Is there any way to assign them automatically.

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On 26/10/2011 at 07:09, xxxxxxxx wrote:

Do you mean with "texture groups" a null-object that groups objects with the same texture ?
There are many possible ways to solve this.

Let's say all your objects are at top level of the document and that the path to the textures is C:/Textures/3DScanner/.

#note: you do not have to adapt my coding-style  
#      like the indentation of assignment operators, etc.  
  
import  os  
import  c4d  
  
myObjects       = doc.GetObjects()  
pathToTextures  = r"C:\Textures\3DScanner"  
fileExtension   = ".jpg"  
  
def main() :  
  # go through the list and to the stuff with  
  # every object in it  
  for obj in myObjects:  
      # get the name of the object  
      name        = obj.GetName()  
  
      # arrange the new name by replacing  
      # every `_group` with just nothing ``.  
      textureName = name.replace( "_group", "" )  
  
      # concetenate the path to textures with the name  
      # of the texture  
      # we use `os.path` because it adapts the operating  
      # systems way to deal with pathnames  
      fullPath    = os.path.join( pathToTextures, textureName )  
  
      # we need the original texturename, so we add the  
      # file extension now  
      fullPath    = fullPath + fileExtension  
  
      # check if the texture exists  
      if not os.path.exists( fullPath ) :  
          # tell that the object could not be associated  
          # with a texture  
          print "Texture could not be found:", fullPath  
      else:  
          # create a standart material for the texture  
          mat     = c4d.BaseMaterial(c4d.Mmaterial)  
          mat.SetName( textureName )  
  
          # create a shader for the material  
          sha     = c4d.BaseList2D(c4d.Xbitmap)  
          sha[c4d.BITMAPSHADER_FILENAME]  = fullPath  
          mat.InsertShader( sha )  
          mat[c4d.MATERIAL_COLOR_SHADER]  = sha  
  
          # update the material  
          mat.Message( c4d.MSG_UPDATE )  
          mat.Update( True, True )  
  
          # insert the material into the document  
          doc.InsertMaterial( mat )  
  
          # create a texturetag and insert the material  
          tag     = c4d.BaseTag( c4d.Ttexture )  
          tag[c4d.TEXTURETAG_MATERIAL]    = mat  
  
          # assign the tag to the object  
          obj.InsertTag(tag)  
  
  # update the Cinema 4D UI  
  c4d.EventAdd()  
  
  # tell that the processing was finished  
  print "Finished processing."  
  
main()

Cheers, Niklas

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On 26/10/2011 at 14:20, xxxxxxxx wrote:

If I read this correctly then you create a new material first.
Is there also a way to change the texture in an already exsisting material?
Greets Ronnie

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On 26/10/2011 at 22:49, xxxxxxxx wrote:

Originally posted by xxxxxxxx

If I read this correctly then you create a new material first.
Is there also a way to change the texture in an already exsisting material?
Greets Ronnie

Thanks, you understood my problem. The texture groups are existing. I have to assign the files to the existing texture groups.

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On 27/10/2011 at 06:32, xxxxxxxx wrote:

Use

doc.SearchMaterial(name)

to find a material by name.

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On 28/10/2011 at 01:41, xxxxxxxx wrote:

Thanks to all. I solved the problem. Here is my final script:

  
import c4d  
from c4d import gui  
from c4d import storage  
import  os  
#Welcome to the world of Python  
  
myMaterials       = doc.GetMaterials()  
fileExtension   = ".jpg"  
  
def main() :  
  pathToTextures = c4d.storage.LoadDialog(0,"Texturpfad wählen",2)  
  for mat in myMaterials:  
      name        = mat.GetName()  
  
      # arrange the new name by replacing  
      # every `_group` with just nothing ``.  
      textureName = name  
  
      # arrange the new name by replacing  
      # every `_group` with just nothing ``.  
      textureName = name.replace( "material_", "texture_" )  
        
      # concetenate the path to textures with the name  
      # of the texture  
      # we use `os.path` because it adapts the operating  
      # systems way to deal with pathnames  
      fullPath    = os.path.join( pathToTextures, textureName )  
  
      # we need the original texturename, so we add the  
      # file extension now  
      fullPath    = fullPath + fileExtension  
        
      # check if the texture exists  
      if not os.path.exists( fullPath ) :  
          # tell that the object could not be associated  
          # with a texture  
          print "Texture could not be found:", fullPath  
      else:  
          # create a shader for the material  
          sha     = c4d.BaseList2D(c4d.Xbitmap)  
          sha[c4d.BITMAPSHADER_FILENAME]  = fullPath  
          mat.InsertShader( sha )  
          mat[c4d.MATERIAL_COLOR_SHADER]  = sha  
  
          # update the material  
          mat.Message( c4d.MSG_UPDATE )  
          mat.Update( True, True )              
  
  # update the Cinema 4D UI  
  c4d.EventAdd()  
  
  # tell that the processing was finished  
  print "Finished processing."                  
  gui.MessageDialog("Finished processing.")  
  
if __name__=='__main__':  
  main()  

But there are two new questions.
1. If I look into the documentation the function GetMaterials is in the namespace c4d.documents.BaseDocument. But if I use this namespace the command could not be found. Why and from where I can know the namespace doc? I got it from the script above.

2. In the documentation for the command LoadDialog is written about constants like FILESELECT_DIRECTORY. But it isn't known by the interpreter. Where are they defined and what I have to import that it works?

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On 28/10/2011 at 02:43, xxxxxxxx wrote:

1. c4d.documents.BaseDocument isn't a namespace, it's a class representing a C4D document. To get the current document as doc:

from c4d import documents
...
doc = documents.GetActiveDocument()

2. FILESELECT_DIRECTORY and all the constants are defined in the c4d namespace : for example c4d.FILESELECT_DIRECTORY.

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On 28/10/2011 at 04:46, xxxxxxxx wrote:

As you see in my sourcecode I have never declared doc but it works. Is it declared implicit? I've found nothing in the documentation about it.

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On 28/10/2011 at 05:11, xxxxxxxx wrote:

Originally posted by xxxxxxxx

As you see in my sourcecode I have never declared doc but it works. Is it declared implicit? I've found nothing in the documentation about it.

Yes, everywhere in the code, 'doc' is the current document and 'op' is the current activate object. I'll add this to the docs.

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On 28/10/2011 at 05:18, xxxxxxxx wrote:

You don't seem to understand that I have written the code above just for you, and not just because I'm so bored. I don't think many other people would have done this for you.
At least some sort of thank you in your second post would have been appropriate rather than to complain it is not exactly the way you need it.

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On 28/10/2011 at 06:20, xxxxxxxx wrote:

Originally posted by xxxxxxxx

You don't seem to understand that I have written the code above just for you, and not just because I'm so bored. I don't think many other people would have done this for you.
At least some sort of thank you in your second post would have been appropriate rather than to complain it is not exactly the way you need it.

I think you posted the code in the wrong topic...
The topic about finding a material by name is this one : https://plugincafe.maxon.net/topic/6087/6267_texture-change-python

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On 28/10/2011 at 06:20, xxxxxxxx wrote:

As you can see I used the most of your script in my solution. The only difference is that I had already materials and would like to edit them and the dynamic selection of the texture path.
Many thanks for your script:clap: Without it I wasn't able to solve the problem.

I'm sorry, if it seems that I'm not thankful to you.:blush:

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On 28/10/2011 at 06:33, xxxxxxxx wrote:

Originally posted by xxxxxxxx

I think you posted the code in the wrong topic...
The topic about finding a material by name is this one : https://plugincafe.maxon.net/topic/6087/6267_texture-change-python

Sorry, I didn't understand your previous post but the code you posted later was quite confusing :
https://plugincafe.maxon.net/topic/6085/6265_set-texture-by-script

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On 01/11/2011 at 23:41, xxxxxxxx wrote:

I'm sorry. My reply applies to the post from nux95.

Originally posted by xxxxxxxx

You don't seem to understand that I have written the code above just for you, and not just because I'm so bored. I don't think many other people would have done this for you.
At least some sort of thank you in your second post would have been appropriate rather than to complain it is not exactly the way you need it.