Requesting help skewing a 3D object
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Like this? No plugins required. Simply draw cutters to the appropriate shape, intersect them with the model, remove the waste, scale it back down, done.
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Hi Dave,
Yes! thats exactly what I need to do - I get the intersecting bit, but what I don't get is how to delete the unwanted bits. I end up having to select each line individually, which is a real pain on the circular sections. Presumably there is a quick and easy way of deleting the intersected bits? Thet don't seem to be grouped, so how do you do it?
Thanks a lot for taking the time to help out
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In the case of your listtle clip, I switched to Parallel Projection and chose the standard top view. Then I used the Select tool to drag a right to left selection around the part that I wanted to delete. When you do that, you want to avoid getting any geometry you want to keep. The selection boxes would be about like this. Remember, right to left.
After making the selection, hit the Delete key to get rid of the unwanted bits. You'll still have the curved faces outside the perimeter of the clip to delete but the selection will take care of most of it. When you've finished erasing what you don't need, make sure to correct the face orientation as needed so it's all white faces out. Blue faces should be inside.
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Maybe Dave has a Pro version has shown on his profil so boolean diff operations are more easy (all volume solids must be "waterproof") else you must use the or the delete key
Ps I forget to say you that you must "save as V6" (or V7 if you have Dynamic Components) for a more large audience!
Pss What is your design object ?
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Pilou, I do have the pro version of SketchUp but what I showed was done without the Solid tools. It was done with the native Intersect Faces which is available in the free version as well. If I was showing an operation that required something only available in the pro version, I would have explicitly said so. Not every operation in SketchUp requires a plugin.
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Sure!
A funny thing will be not use curves - surface - extrude but just letters so !
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Boolean tools for free version:
http://sketchucation.com/forums/viewtopic.php?p=112055%23p112055#p112055
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Normally, Ken would jump in at ths point and suggest "Hole on Solid", which is perfect for this situation.
see screencast...
(Is there a way to embed a screencast like with screenr?)
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Learning and understanding how to using the standard tools within SU as Dave has described is far more useful than wandering off into the world of Plugins. Starting to use Boolean tools etc means you need to understand how to make solids, and to understand how to make solids you need to understand the basics.........Relying on plugins to do simple things restricts your ability to understand fully how the program works. Use plugins to automate processes and speed up workflow once you know what you are doing.
Personally I think plugins should only be mentioned in the newbie forum when specifically needed, weld for example, when it can't be done using normal tools, or when specifically asked for.
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You are right, beginners should learn to do such things without plugins (but there are more advanced Sketchuppers reading these questions and answers too and maybe they can find some hints to improve their workflows...)
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@box said:
Learning and understanding how to using the standard tools within SU as Dave has described is far more useful than wandering off into the world of Plugins. Starting to use Boolean tools etc means you need to understand how to make solids, and to understand how to make solids you need to understand the basics.........Relying on plugins to do simple things restricts your ability to understand fully how the program works. Use plugins to automate processes and speed up workflow once you know what you are doing.
Personally I think plugins should only be mentioned in the newbie forum when specifically needed, weld for example, when it can't be done using normal tools, or when specifically asked for.
I agree but, sometimes doing these cleaning operation you just forget this little (so little) tiny segment which will make problems later so you will have to run cleanUp or solid inspector, etc... which are Plugins.
Sometimes you just don't want to spend hours on tedious labour.
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And if you haven't learnt about all those segments and how to deal with them you won't know what to do about them unless you know which plugin you need.
My point being, Newbie forum, beginner user, help them learn how to use the program from the ground up, don't tell them they need to use yet another complicated addition to make something work. Some people constantly recommend plugins unnecessarily and often irrelevant ones. In any other section I have no issue with it, but here in the Newbie Forum it should be the very basics unless otherwise asked for or absolutely essential. Plus the thread belongs to the Original Poster and what anyone else learns from it is incidental, it should be directed towards the beginner user not the advanced user.
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@box said:
Plus the thread belongs to the Original Poster and what anyone else learns from it is incidental, it should be directed towards the beginner user not the advanced user.
I don't agree here, I think this is the reason why Sketchucation is a great and helpful forum, otherwise a short PM would help too. You are right that often a plugin suggestion is not necessary for simple task and may mislead beginners...
**Another point here is the sometimes inappropriate selection of the sketchup level ...
And now I feel that we hijacked this topic
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any answer is a good answer...even a wrong answer
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As a side note:
When you proceed to deleting unwanted geometries, make the part soft and smooth and turn hidden geometry off.
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Just a couple of tips now that I have looked at your model.
Your original profile is made up of exploded curves which means you have many small segments and when you extrude the profile get many facets rather than a smooth face. This can be corrected by smoothing in several ways but it is easier to "Weld" the segments together to begin with. Some version of weld is a plugin that should be included in SU but it isn't. Tig-weld, Recurve, curvizard are a few that can join those segments together.
If you then intersect the smooth faces clean up is simple because you only have to select a couple of faces to delete rather than a multitude of tiny lines. Also, keep track of how many segments you use in a curve, the more there are the smoother the curve but the greater the file size.
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Hi All, and thanks to everyone for helping out - its much appreciated.
First some info requested upthread: I am using Sketchup 2013 v13.0.4812
Now some Updates on my progress:
I downloaded Dave R's skp file to try out, and had some difficulties....you guys must find it annoying explaining basics, but it really helps me. Anyway I have posted both a pic and my updates to Daves skp to show what I mean. The RHS of the pic, numbered (1), is the central model in Daves skp. As he described, I selected the cutouts (from R to L - why is that important?) and hit delete, which removed all but the curved face from the cutout box, and left the clip sticking thro. However, I can't delete those remaining bits of the clip - as you can see, if I select an edge and delete, it simply removes the face along the whole of the clip. What am I doing wrong?So I then thought the problem might lie with groups. I went back to the LHS model in Daves skp, made the clip a group then extruded one of the 2D cutouts and made that a group too. I then intersected the cutout group with the model group, and finally selected and deleted the cutout group. This left an outline of the cutout on the clip, and I then selected and deleted that outline. This worked, but with 2 problems (see (2) in my pic); the cut edge of the clip is open, that is there is no face. and the face element is free floating (on the outside face of what was the cutout box. How do I solve that? Its easy enough to delete the floating face, but how do I close or heal the open face?
@ Giles - you said "When you proceed to deleting unwanted geometries, make the part soft and smooth and turn hidden geometry off". How do I make a part smooth and soft?
I then went on to try OSCoolean, and after a few initial problems, that works fine. Hurrah, and thank you Giles! I'm going to try Cotty's hole on solid method now.
Last thing - I understand the point about grasping the basics first before using plugins, and its a good idea - thats why I'm asking where I'm going wrong with Dave R's approach. But sometimes people just want to get something done and move on - and there plugins seem to help. Speakig as a newbie, its a balance between learning, and getting so frustrated you just abandon the whole project.
Thanks again to everyone for chipping in - it really does help
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ADDENDUM to my post above - thanks Box, missed your post when I first replied.
Your comments re segments rings a loud bell with me, because I did increase the segment count in the circular sections. I assume that (1 of) the Tig-weld, Recurve, curvizard plugins should be applied to the 2D outline before it is extruded? Do the above differ from the "weld" plugin?
I guess this is also what Giles was saying with his comment "make the part soft and smooth and turn hidden geometry off" -
First, any of them should weld the curves. I could have done that in the model but I didn't.
If you make groups of the clip and the cutters before doing the intersections, you will only get the lines where the faces cross. Since the faces of each group are in different contexts, there'll be no faces left where you want them. That's why I didn't make groups or components of the clip and cutters before doing the intersections. By doing it the way I showed, the faces of the clip cut through the faces of the cutter. The cutter surface gets divided into faces inside and outside the perimeter of the clip.
I don't know why you didn't get an intersection along the top of the clip. Perhaps you didn't select enough geometry before running the intersection. There's no intersection on the lower side of that surface either. Try it again and select all of the geometry of the cutters AND the clip. A big selection box around them should do it.
Here are some quick screen shots.
I've deleted all but the curved surfaces that actually do the cutting for clarity. The rest of the "cutter" geometry is only there as a result of using Push/Pull. Since it doesn't cut through anything, that geometry can be deleted ahead of time.
I triple clicked with Select on the geometry to select it all in preparation for the intersect but sometimes you need to use a selection box around it all to get everything selected. Use what works.
After intersection there are edges where the faces pass through each other.Again, for this to work correctly, the geometry of the cutters and the clip must be in the same context. If you want to make a component or a group of the clip before cutting it, that's fine but the cutters must be inside that same component or group to get it to work.
Here I've deleted the clip's surface on the waste side of the cutter and selected the now unneeded cutter face. Notice the blue face inside the perimeter of the clip is not selected indicating it is separate from the outside. This is a good thing to check to make sure the intersection is complete with no gaps.
The blue face on the edge of the clip needs to be reversed so its white side is out.
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