HOW to export bezier curve to 3d software like cinema4d?

kn1c

HOW to export bezier curve and points to 3d software like cinema4d?

PhiLho

By saving the points in the proper format, depending on what this software can import.

Processing has a number of libraries for 3D export. See if one of them fits.

kn1c

I got it to work now I saved position into a txt file and read the txt file using python script. Cinema4d project file below if anyone interested.

https://dropbox.com/s/t63romtrre9byc4/pythonSplinne.rar

jamesc

Thanks for sharing this, I'm currently going through the same process and trying to learn how its done. Could I ask how you exported the positions out of processing into a txt files though?

kn1c

Use PrintWriter: processing.org/reference/PrintWriter.html

PrintWriter output = createWriter("output/fileName_"+(frameCount-1)+".txt");
      output.println(i + ", " + start.x + ", " + start.y + ", " + start.z
        + ", " + cp1.x + ", " + cp1.y + ", " + cp1.z
        + ", " + cp2.x + ", " + cp2.y + ", " + cp2.z
        + ", " + end.x + ", " + end.y + ", " + end.z
        );
    output.flush();
    output.close();

There is also an example how to save data to txt file in Processing Example > Topics > File IO. Here is link to download Processing project file: https://dropbox.com/s/ppe8oz0d2nmccb1/Neuron3D_v10_export.rar In the project file, the code to export position of bezier vertex is on the line 133

jamesc

Thanks a lot kn1c.

jamesc

kn1c, I could help me with one more little thing if it's not to much? I have got a sequence of .txt files exporting out fine from processing with the right data. I'm struggling with how to read the sequence in c4d though. I have tried to strip the end of the string off and then add the keyframed 'offset' value to match the sequence files ( myfile_0.txt, myfile_1.txt etc) but dosnt seem to update the positions of the object in the scene.

base, ext = os.path.splitext(csvfile) #strip .txt at the end of the string
    striped_num = ''.join([i for i in base if not i.isdigit()]) #strip the number at the end of the string
    csvfile = str(striped_num + str(offset) + ext) # add offset value to string to match sequence

Have you had any luck with such a process?

jamesc

Here is a simple sequence of 10 .txt files I am trying to work with at the moment for example. https://dropbox.com/sh/tt9v2d7e3ipjxbg/LYezjHC5Fx

kn1c

I updated the code at line 11 to read a file accrding to current frame. open script > consle in c4d to see if it can't locate the file.

your bill.txt has wrong format look at the attached file.

https://dropbox.com/s/pchd3dp967v4a21/pypSp.rar

jamesc

Thanks again kn1c, you've been a massive help for me in understand this process. Cheers.