boolean quest
menschtx
Posts: 8
Trying to boolean a 'grouped' object, do I make the 1st object positve (includes other booleaned objects) and the 2nd object (booleaned) to negative. When doing so the 2nd object doesn't boolean. Suggestions please
Comments
i'm not sure what you mean but the rules in boolean operation are :
1.Every object or group must have an attribute : Positive or Negative or Intersect.
2.In order to apply the boolean operation and reveal it on rendering , such as cutting or hiding or extracting , the objects or the groups needs to be grouped.
So if you have 2 groups to work as boolean you need to set for each an attribute then group them again to create a bigger group from 2 or more groups.
If you need to make a simple object to apply a boolean operation to a group, you need to ungroup that and group it again with the newest object added.
Hope im not wrong , also wait for more replies perhaps from a moderator or admin too.
I made a tutorial too about basic and complex booleans and posted here :
http://www.sharecg.com/v/63140/browse/3/PDF-Tutorial/Bryce-Tutorial-1---Basic-and-Complex-Booleans
Enjoy the tutorial and the music . :-)
hope it helps.
Think of the negative object as being the cutter. And the positive object as the one you want to keep. If you are dealing with multiple objects, make sure none are part of a group, when doing the boolean operation.
So select the group, ungroup it, but keep it selected and then select the additional objects and finally regroup all of the selected objects.
Thank you, this is wonderful :)
Hello menschtx.
Looks like you got a lot of good advice already.
There is something which confuses many people [including myself]. That is the fact that a compound negative boolean object to be used as a cutter [to cut away parts of another object], must have all of its constituent parts made positive. Then after grouping it, the entire group automatically becomes a new neutral object. Select that new neutral object [NOT the individual objects in the group] and make that object negative. All the so called instability about Booleans that people complain about derives from not understanding this.
I must confess i find it hard to understand and find it counter intuitive. But if you have studied mathematics and logic you know that double negatives convert to a positive. The programmers of Bryce it seems followed the mathematical way and not the artistic intuitive way. They could have programmed it either way but it requires much less programming if you allow the user to set the attributes. To get Bryce to figure out what the user wants would have been very complicated for the program.
Kind regards
Peter.
PS - edit experiment.
I forgot to add:
The object to be cut must be treated in the same way if it is constituted of many objects. But here double positives are allowed unless you are using compound Boolean Set Operations in which case the final set to be cut must be positive.
If you have any questions just ask me.
cris333
When assigning attributes to the objects, are these to be the same as in grouping two objects - make these positive. Then the boolean is set to negative. Your reply suggests 'locking' the group (I assume), after having done so - it seems now the 'locked' object is unresponsive. I have searched the net for a solution.
Also I was wondering if the pdf on your suggested site has an index of chapter information other than the bookmark section?
Aha - [+] + [+] = +; [-] + [+] = -; [-] + [-] = +.
Hmmmm, sooo, E=MC2 Does put the bubbles in beer.
Cheers
GG
Thanks cris333 :)
'Intersected Worlds'
You are very welcome Ianz.Very nice your render related to Intersect ,your render looks like another space-time dimension and an anomaly or a slice of our reality got in there :) . You can name it "Intersected Worlds"
A song recommended for your render would be : Vangelis - Alpha ;-) http://www.youtube.com/watch?v=1jG--3elufo
By the way i saw you have a great inspiration for abstract art.I tried once to create a desktop wallpaper for me and didn't succeded ,maybe i wasn't in the right mood lol.I bookmarked on my google chrome your tutorial from deviant art for abstract art.Ty for that too.
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Boolean example scenes for menschtx.These scenes are attached in the boolean tutorial or sharecg website, except the alien cocoon plants scene (the 3rd image), easy to create too, with 7 vertical toruses and a sphere or so , can't remember right now .
Cheers cris, pic is suitably renamed :)
Found the tut really easy to follow, so clear and well written, playing with the pyramids now ;)
And thanks for the link, I haven't heard that track in forever, fav'ed it now :-)
cris333
I read and went thru your tutorials on your site, very informative. My question is about the 'advanced' section and the 'muli-replication' of objects during the pillar exercise.
I is there a way to put in the numbers to 'spin' the multi-replicate' the object or just wing it?
I wanted to thank all who offered ideas and suggestions - even with links.
Once again
Thank you
Yes, sorry for the late reply, look at the image bellow and type in Rotate (Y-axis) a random value.Typing in rotate in Y axiss will make the replicated objects to spin around their axis, vertically.Feel free to type different values on X or Y and see the results.You can always Undo with CTRL+Z.Also you can rotate each object manually too, to select each object just hold CTRL and click on that object or area to select.
Wish Bryce could have enabled the axis pointers like in Daz ...
Have fun and by the way great job on your boolean objects scene.A tip, when you render 3D objects , try to move a bit to the left or right the camera , so the 3D objects will reveal the true 3D aspect (depth) and not looking like are brushes from Photoshop :)
Thank you too for feedback and have fun.
Thanks again, another ?
After saving in .br7 and searching everywhere on my pc (folders) and such - I can't find the scene.
When using PLE I could see the scene on the bottom left. But when searching by name > nothing.
Any suggestions?
Bryce saves a scene where you've saved the previous one. I recommend to use "Save As" so you can navigate to the folder where you want to save it.
Yes, sorry for the late reply, look at the image bellow and type in Rotate (Y-axis) a random value.Typing in rotate in Y axiss will make the replicated objects to spin around their axis, vertically.Feel free to type different values on X or Y and see the results.You can always Undo with CTRL+Z.Also you can rotate each object manually too, to select each object just hold CTRL and click on that object or area to select.
Wish Bryce could have enabled the axis pointers like in Daz ...
Have fun and by the way great job on your boolean objects scene.A tip, when you render 3D objects , try to move a bit to the left or right the camera , so the 3D objects will reveal the true 3D aspect (depth) and not looking like are brushes from Photoshop :)
Thank you too for feedback and have fun.
cheers from me too :)