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Bryce F.A.Q (Last Updated: 2024 Nov 26 4:28 pm)

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Subject: Boolean problem


mwortman ( ) posted Tue, 20 July 2004 at 10:31 PM · edited Thu, 12 December 2024 at 1:05 PM

I am having trouble with some Boolean operations. I created an object in ProEngineer and after saving it aa an Lightwave.obj imported it into Bryce. I sized and then positioned it and duplicated and expanded the dup, making the original negative and the larger dup positive. I alligned the pair centered front to rear and left to right and increased the height of the original until it cleared the dup. I then grouped the two. Instead of the "shell" I expected, the negative object disappeared in the render and the positive one remained. Before grouping, both showed as they did after I ungrouped. I created a cube and it worked with both objects as expected when I assigned the cube the appropriate (Positive or Negative) attribute. What is going on? Why will the imported objects work with the cube but not each other? Does it have something to do with them coming from one source ?


gregsin ( ) posted Tue, 20 July 2004 at 10:45 PM

I'm not sure I understand this, but the positive boolean is the one that remains (shows up) after a boolean operation and the negative part disappears, just the opposite of what I'm reading. So the negative whould cut away from the positive. If I've mis-understood the message ignor me.


Swade ( ) posted Tue, 20 July 2004 at 10:55 PM

Yep.... the positive is what will remain. The Negative cuts away from the positive.

There are 10 kinds of people: Those who know binary, and those who don't. 

A whiner is about as useful as a one-legged man at an arse kicking contest.


AgentSmith ( ) posted Tue, 20 July 2004 at 11:00 PM · edited Tue, 20 July 2004 at 11:09 PM

I know what you are talking about.

You can't make a shell that way unless it is just a simple primitive, lol.

Uhm...don't know the technical aspect of how to word why it won't work. It's just the "aspect" of the mesh.

It's not Bryce, it's just principal of the mesh.

Like I said, I don't how to word it, lol.

Other than that, the imported mesh has to be made ready for booleaning. Select the mesh, click the little "E", and select "Solid When Boolean Rendering"

Message edited on: 07/20/2004 23:09

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"I want to be what I was when I wanted to be what I am now"


tjohn ( ) posted Tue, 20 July 2004 at 11:06 PM

file_117956.gif

Imported meshes have to be TOLD to boolean.

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy


tjohn ( ) posted Tue, 20 July 2004 at 11:08 PM · edited Tue, 20 July 2004 at 11:12 PM

And this may still not work (like AS says), depending how "enclosed" the space the mesh occupies is. For example, Poser figures can be booleaned, but only if exported as single object meshes. If exported from Poser as multiple objects, it won't work right.

Message edited on: 07/20/2004 23:12

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy


AgentSmith ( ) posted Tue, 20 July 2004 at 11:12 PM

file_117957.gif

Exactly. Like in this, I can easily take a sphere and give it a smaller negative duplicate and create a shell. But, anything more complex than a primitive, it just makes the mesh smaller overall, it doesn't shrink the "skin" of the mesh. AgentSmith

Contact Me | Gallery | Freestuff | IMDB Credits | Personal Site
"I want to be what I was when I wanted to be what I am now"


AgentSmith ( ) posted Tue, 20 July 2004 at 11:14 PM

With the example of the knot, I would have to go into the program I used to create it and shrink the diameter of the knot, import that 2nd mesh, and use it to cut out the inside of the first larger mesh. AS

Contact Me | Gallery | Freestuff | IMDB Credits | Personal Site
"I want to be what I was when I wanted to be what I am now"


tjohn ( ) posted Tue, 20 July 2004 at 11:15 PM

A little cross-posting here, but the point is clearer. :^)

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy


Paintballa198 ( ) posted Tue, 20 July 2004 at 11:16 PM

AS whatd you make that twisty tubing with? Since that smart pipe isnt downloadable anymore im all outta options.


AgentSmith ( ) posted Tue, 20 July 2004 at 11:26 PM

Lol, that is from a freeware program called "KnotPlot". I used it to make a pic of mine. Red Dragon; http://www.renderosity.com/viewed.ez?galleryid=486441&Start=1&Artist=AgentSmith&ByArtist=Yes KnotPlot Download; http://www.pims.math.ca/knotplot/download.html KnotPlot Galleries; http://www.pims.math.ca/knotplot/index.html

Contact Me | Gallery | Freestuff | IMDB Credits | Personal Site
"I want to be what I was when I wanted to be what I am now"


pauljs75 ( ) posted Wed, 21 July 2004 at 12:55 AM

Re: #6 on the multiple objects... That could be the same problem that people get when trying complex booleans with multiple grouped objects. Try setting all the multiple parts of an imported object grouping to positive and then set the group as a whole to negative. Also one might have to set all the meshes to behave as solid on an individual basis. Just my 2.


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shadowdragonlord ( ) posted Wed, 21 July 2004 at 5:37 AM

Aye, at times Bryce's boolean can be frustrating, but the cool thing about it is that you can erverse engineer it and take a model back apart, if it's done in Bryce. Not so if it's done in a heavy modeler...


AgentSmith ( ) posted Wed, 21 July 2004 at 5:46 AM

Some will allow you the option whether or not to take your booleans and make them "true" or not. Truespace will do that, but I have tried to get into its GUI, and just can't.

Contact Me | Gallery | Freestuff | IMDB Credits | Personal Site
"I want to be what I was when I wanted to be what I am now"


mwortman ( ) posted Wed, 21 July 2004 at 9:05 AM

OK, Thanks to you all. I hadn't checkeked the "Solid when Boolean Rendering" boxes. I hadn't known they were there. It worked fine after I checked them. Michael


AgentSmith ( ) posted Wed, 21 July 2004 at 9:29 AM

Lol...well, glad it worked out! Per the Bryce Forum tradition, we hijacked your thread into an almost totally different discussion. :o) Just be glad there aren't any kitten pics. (it's happened) AgentSmith

Contact Me | Gallery | Freestuff | IMDB Credits | Personal Site
"I want to be what I was when I wanted to be what I am now"


shadowdragonlord ( ) posted Sat, 24 July 2004 at 3:03 AM

file_117960.gif

Kitten pic, sorry, I had to do it. Agent Smith's words are like commands, it's as submissive as I get, and I can't screw THAT up.


tjohn ( ) posted Sat, 24 July 2004 at 3:19 AM

Kittens and baby chicks at war with each other? Say it ain't so!

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy


tjohn ( ) posted Sat, 24 July 2004 at 3:23 AM

file_117961.gif

At least kittens and baby ducks have signed a peace accord.

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy


TheBryster ( ) posted Sat, 24 July 2004 at 8:02 AM
Forum Moderator

BABY DUCKS? Be afraid! Be VERY afraid! Them there ducks can be lethal! The next frame will probably show the kitten on its back with its throat ripped out......

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


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