|
|
Face the problem
About Truespace Archives
These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Face the problem // Archive: Tech Forum
Post by rjeff // Oct 23, 2007, 10:06am
|
rjeff
Total Posts: 1260
|
Ok I am trying to delete this secition of the clyinder to keep the image clean. I have tried to do a boolean and I get the "you are to precise error" ..how stupid of an error..."hey you are to good..mess up a bit...I hate that error. Second I tried to select that face and delete it and it won't. AHHHH.. |
Post by jamesmc // Oct 23, 2007, 10:10am
|
jamesmc
Total Posts: 2566
|
Not sure what I'm looking at. It looks like you've selected three objects, two cubes? and a cylinder? |
Post by rjeff // Oct 23, 2007, 10:13am
|
rjeff
Total Posts: 1260
|
sorry they have been unioned together to make them one obejct. I need that little pie piece gone. |
Post by frootee // Oct 23, 2007, 10:27am
|
frootee
Total Posts: 2667
|
well, it looks like what you need is a partial cylinder to begin with. You can create a cylinder I think, while at the same time, specifying the angle. In other words, a full cylinder uses 360 degrees; you can create a cylinder that is only 270 degrees. If you can do that, then you can boolean that, as is, to the other two objects.
HTH
Froo |
Post by jamesmc // Oct 23, 2007, 10:28am
|
jamesmc
Total Posts: 2566
|
Not sure why it wouldn't work. You just need a duplicate of your two cubes with the height changed to cut out a pie shape out of the cylinder and the two unioned cubes.
I'll try it later.
Frootees suggestion might be more elegant though. |
Post by frootee // Oct 23, 2007, 10:35am
|
frootee
Total Posts: 2667
|
actually, jamesmc gave me another idea.
Take your cylinder, and create another cube. The cube should be at least slightly larger than the cylinder.
Position the cube so one edge is at the center of the cylinder.
Boolean subtract the cube from the cylinder.
This will remove the pie shape you are talking about.
Then boolean this new shape to your other two cubes.
Froo |
Post by rjeff // Oct 23, 2007, 10:38am
|
rjeff
Total Posts: 1260
|
hmmm. I don't see that option frootee. You can do alot of things, but set the degrees. |
Post by TomG // Oct 23, 2007, 11:09am
|
TomG
Total Posts: 3397
|
That's a tS7 primitives feature, you can specify in degrees the longitude and latitude of things like cylinders, spheres and donuts (torii).
It looks like the resulting booleaned object is a little but of a mess there, that can be an issue where faces line up exactly. You could do a boolean intersect of the cylinder with the cubes, to end up with just that part that will overlap the cubes, that would be another way (pre-boolean union).
HTH!
Tom |
Post by TheWickedWitchOfTheWeb // Oct 23, 2007, 1:59pm
|
TheWickedWitchOfTheWeb
Total Posts: 858
|
Enter point edit mode and using the lasso or rectangle select with faces selected, select the whole of that piece of pie. Then, in the point edit toolbar, use the 'separate selected part of object' button (third icon along, looks like a sphere cut in two). That'll separate that piece, making it a separate object, which you can then delete . That should do it. |
Post by Nez // Oct 23, 2007, 10:38pm
|
Nez
Total Posts: 1102
|
Failing all that, enter top view and create a new spline, tracing your existing object and extrude it to create a solid exactly the shape you want - you can use point edit with the object tool to give you the precise co-ordinates of each corner to ensure you match up exactly... (well you can in older versions of TS..:rolleyes:)
This can be a work around if the shape is fairly simple like this one. |
Post by rjeff // Oct 24, 2007, 5:01am
|
rjeff
Total Posts: 1260
|
I am not sure why but I can't select faces. I have tried that. This is really frustrating. Neither lasso or rectangular selection work. |
Post by TheWickedWitchOfTheWeb // Oct 24, 2007, 5:03am
|
TheWickedWitchOfTheWeb
Total Posts: 858
|
Doesn't sound right. Can you upload the object for one of use to check over? |
Post by rjeff // Oct 24, 2007, 5:32am
|
rjeff
Total Posts: 1260
|
here ya go.. it is setup just like I have it. |
Post by TheWickedWitchOfTheWeb // Oct 24, 2007, 5:55am
|
TheWickedWitchOfTheWeb
Total Posts: 858
|
The problem is the objects were glued, so the slicing wouldn't have worked as the cylinder object didn't actually have the lines you were trying to use, they belonged to the two cubes. Anyway, separated the objects, booleaned the corner out the cylinder and then unioned the straight bits. Anyway, here it is. The mesh needs a little tidying up but you can do that!
9133 |
Post by rjeff // Oct 24, 2007, 5:58am
|
rjeff
Total Posts: 1260
|
thanks. I will look at what you did and try to repeat. I need to learn this stuff. |
Post by TomG // Oct 24, 2007, 5:59am
|
TomG
Total Posts: 3397
|
Yes, the boolean just hasnt worked - that's why so many suggestions focus on how to redo the boolean :)
You can Decompose Into Objects and then Split Hierarchy to get it back into 3 separate objects.
Then I would remove the parts of the circle that you don't want BEFORE doing the boolean. The overlapping faces most likely give tS problems.
So do things like delete the unused faces (by PE, or by subtracting the rectangle sidewalk objects) first. Or avoid booleans and build the semi circle section yourself (boolean the two rectangles together, use PE to draw edges to connect them, then just add edges and move them into position to build the required corner - you could add a cylinder to the scene to copy the vertex positions if you want 100% accuracy).
However the object as you have it is "unusable" as the boolean just didnt work (as you commented on).
HTH!
Tom |
Post by TheWickedWitchOfTheWeb // Oct 24, 2007, 6:07am
|
TheWickedWitchOfTheWeb
Total Posts: 858
|
Yep, Tom's right. Start with the cylinder, then point edit that to gibe you the three quarter 'pie cut out' shape (easy to do, delete all but one of the edges from a quarter and move the one edge left to the middle). Then the sweep tool will be your best friend, sweeping out the other edges and point editing to make the straight bits.
Does that make sense?
There are several other ways to do it (such as draw it in vector and import as an eps, sweep, done) so keep at it. |
|
