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Split an object into 2? -Solved
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Jeroen
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Joined: 07 Aug 2004
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Location: The Netherlands

PostPosted: Wed Dec 19, 2007 7:25 pm    Post subject: Reply with quote

As I promised, Knife will be part of 1.8. Question is, how should it work?

I basicly see two options here:

1. Have it work like the CSG routines. That is, use a rectangular polygon as operator to slice an object into two parts. This is flexible because the rectangle could be used multiple times and allows for all kinds of cuts because you can rotate the rectangle into any position.

2. Simply draw a 2D line in a 2D view which is used to slice a part of an object. This allow you to work faster because you only have to draw a 2D line (which is done quickly) but less flexible than option 1 because you can´t rotate the cutting plane in this case.

So, you choose! Flexibility or efficiency?

If there is a better way of performing a knife tool (flexibility and efficiency combined), please do tell, of course. Smile
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Mr.Fletcher
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Joined: 07 Aug 2004
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Location: Germany

PostPosted: Wed Dec 19, 2007 7:47 pm    Post subject: Reply with quote

What, if you just combine it? The way polyline works, maybe. Click, click, click and you've got your cutting plane.
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santutatu
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Joined: 18 Aug 2007
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PostPosted: Wed Dec 19, 2007 8:05 pm    Post subject: Reply with quote

yeah...or simply using a rectangle...you insert it in the top view...the you move it along the Y axis in any of the other views...you can rotate it too...and then the command Smile
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Jeroen
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Joined: 07 Aug 2004
Posts: 5332
Location: The Netherlands

PostPosted: Fri Dec 21, 2007 2:17 pm    Post subject: Reply with quote

santutatu wrote:
yeah...or simply using a rectangle...you insert it in the top view...the you move it along the Y axis in any of the other views...you can rotate it too...and then the command Smile


That's option 1. Smile

Option 2 enables you to quickly draw a line in a 2D view. This line is then converted (internally) to a cutting plane which is then used to cut your objects.

Based on this little discussion, I will implement option 1. It is more flexible for users and most likely easier for me to implement.
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Tincho
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Joined: 24 Aug 2007
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PostPosted: Fri Dec 21, 2007 10:16 pm    Post subject: Reply with quote

Jeroen wrote:
Based on this little discussion, I will implement option 1. It is more flexible for users and most likely easier for me to implement.


Yes, maybe it's not as fast as option 2 but gives the user more "cutting" posibilities..
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santutatu
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Joined: 18 Aug 2007
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PostPosted: Fri Dec 21, 2007 10:49 pm    Post subject: Reply with quote

i think that it will be as quick as the option 2...the number 1 would only take more time if you need a specific angle...which....you can't do with the number 2 Very Happy
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Basiror
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Joined: 12 Dec 2007
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PostPosted: Mon Dec 24, 2007 10:17 am    Post subject: Reply with quote

what about a cutting triangle
you need only 3 points to define a plane

place a line in view xy view for example translate the third point in the xz view thats how they handle it in the radiant editors
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Jeroen
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PostPosted: Mon Dec 24, 2007 10:37 am    Post subject: Reply with quote

Basiror wrote:
what about a cutting triangle
you need only 3 points to define a plane

place a line in view xy view for example translate the third point in the xz view thats how they handle it in the radiant editors


Yes, that´s option 1. However, I already implemented option 2. Wink
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yanchiko
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Joined: 09 Dec 2006
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PostPosted: Thu Dec 27, 2007 10:31 pm    Post subject: Reply with quote

Knife tool rules for now..... Very Happy efficiency rules....better yet,place your mouse on a brush in question draw a line,release mouse button,you have a cut surface....done!
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