Yable problem solved, and a bug?

Coding Python Support
1

I found out tonight why my Yable wouldn’t work, I hadn’t finnished the installation of Yafray properly.
Now something else: As suggested in the docs the Render-button in Yable does not launch Yafray. But if I export with the Export-button and then render with the Yafray GUI I only get an error message saying that something is wrong with my .xml file. However, if I export with Yable’s Render-button and then render from the GUI, it all works fine. :-?
Any comments, anyone?

2

What error statement are you getting?

If it is the “Can’t launch renderer” error, you can make a minor modification to the script as recommended by eeshlo to fix it:

https://blenderartists.org/forum/viewtopic.php?t=7728&start=270

Starting at line 1629:


try:
			if POSIX:
				#os.spawnvp(1, "yafray", tuple(("", cpus, filename)))
				os.spawnlp(1, "yafray", "", cpus, filename )
			else:
				cmd = "C:\\YAFRay\\YAFRay"
				args = (cmd, cpus, filename)
				os.spawnv(os.P_NOWAIT, cmd, args)
3

That’s right, “can’t launch renderer”. I’ll try what you suggested, but how do I find line 1629 without counting manually?

4

ALT+J in text window.

Env

5

Well, if you are using Blender 2.26, there is a new icon in the Text Window header that contains 4 black horizontal lines with a tool tip that shows ‘Display Line numbers’. Press that icon button for Line Numbers.

Also, I should have mentioned that when you edit the Python file to be carefull, Python uses Tabs/spaces/ ‘White space’ to indicate delimitors. ie. which code belongs to which block. Also, you may need to modify the code I posted depending on where you installed the YAFRay executable file to -> I installed it in C:\Yafray .

Maybe someone can post the modified file if you don’t feel comfortable editing it. (I have no web site yet - sorry)

As env suggested, pressing Alt _ j is a fast way to jump to the desired line number. Also, note that for earlier versions of Blender, you can use this key combination as a quick check to see which line number the cursor is currently on in your Python file.

6

I just tried this but it did not work well, this is what I get:

http://home.tiscali.no/hanspb/misc/yablemsg.jpg

My Yafray is in c:\programfiler\yafray, so I changed the “cmd = …” line to
cmd = “c:\programfiler\yafray\yafray”

Any ideas?

And by the way, gram.yafray is also in c:\programfiler\yafray.

7

What does your line 62 read?

I have:

YABLEROOT = “C:\Data\Yafray”

If you look at line 67 in the Python script, the programmer has shown an example of the format to follow for windows users (line 68 is for unix users).

8

This was a bit of a surprise to me, but it seems that for windows the path to the gram file is hardcoded in yafray as ‘c:/yafray’. However, it also looks at the current directory, so if you are rendering from Blender, try copying gram.yafray to the blender directory.

9

Thanks, eeshlo! Copying gram.yafray to the blender directory did the trick! So now I can raytrace directly from Blender! :smiley: