Help Me Draw A Dome [TUTORIAL]

D0me · 26 Jan 2010, 12:33

Hi Gai

we can move the side components out by 1/2" on each side (they got closer by moving the siding panels in anyway)

This works for me perfectly.

And of course, don't be annoyed with these little issues as they always come up when designing something "from scratch". It's a constant thinking and re-thinking and changing and adjusting process - but of course that's exactly the advantage and strength of SU to allow us to do this always "on the fly"

Yep designing something from scratch on paper has both the up and downside. To me the upside is you don't go halfway through the actual building process to find that you've done some miscalculation and the downside is you always changing the design for the better which in fact if you look at it from a different light, it is an upside.

Gaieus · 26 Jan 2010, 13:24

@d0me said:

...the downside is you always changing the design for the better...

Believe me or not, I have never finished any project, any model in my life.
There are a lot of course that I abandoned and became "ready as is..." but if I had to do them again, I would start adding and tweaking until I run out of deadline and hand it in again "as is..."

So back to our lesson (as later I may have to leave)

Move one side component 1/2" inch out along the green axis (remember; green axis lock is the left arrow key on your keyboard). As we are in decimal inches, the Measurement box (aka "VCB" = Value Control Box until SU 6 as you may find in older tutorials) will display 0.5" (more exactly 0,5" on myscreen as that is the decimal divider on many non-English operating systems).
Of course, typing either 1/2" or 0,5" will do the same (moreover, as our model's default unit is inch, you can even omit the " symbol)

Do the same on the other side...

Now still using our "useless geometry" we left in the leg component (remember when I said it is very comfy there?), grab the still selected side component and Copy-Move (Ctrl + ) it along the red axis to snap to the opposite endpoint of the same, useless geometry.

Now we rotate it in place - still using the useless endpoint...
We need to do this along the blue axis (see the blue protractor to make sure we are along the blue axis). If you have hardships aligning it along the blue, use the top of the base box to get a blue protractor and the Shift key to lock it there - then move it to the endpoint and click to establish it.
Now drag the component and rotate it by 90 degrees.

We are actually done - there are still those side faces (ungrouped and outside of any component) that cover the back and "north" side of the original base block - lose them...

Note that now we have overlapping geometry in the model as the back side and the "side side" components both contain the legs on the back corners. We do not care with them at the moment but will need to remember.

Next step will be to reuse some nested components in our "side" components to cover the front of the base but that will be a different cover of course.

To prepare for this step, repeat the

Copy (to clipboard)
Move
Flip (still along the "Component's green" axis as that is now different from the World axes) 1. Paste in place
(you can also delete the front, ungrouped face just like in the last image above)
process outlined in this step above now doing it with the back side copying it to the front. Don't worry if that should be different - we shall deal with it later.

D0me · 26 Jan 2010, 14:12

Hi Gai

This stand now is taking Shape.
I've prepped for the front using the method you provided. I copied the back side covering to the front.
All good to continue.

Thanks

Learning-Dome+Stand (Cylindrical By D0me).skp

Gaieus · 26 Jan 2010, 14:30

Okay, this is my time to leave now so sorry but will be back to the project later.

Gaieus · 27 Jan 2010, 11:03

Okay, back again with the next step. We are going to start to finalize this whole stand now.

First we make sure that by modifying the front, we do not modify the rest of the side components. This can be done two ways;

right clicking and "Making unique" - but there is no much sense in doing this as we do not have any advantage of keeping it as a components at all
so we simply explode this front instance of the "side" component instead

Remember that we have overlapping geometry - the legs are repeated twice in each corner - so it is high time to delete the two from the ones that we have just exploded.
(Also keep in mind for later that we still have overlapping legs in the back corners of the stand but we deal with them later).

I guess we do not need these three parts in the front (although I am not sure at this point because we have sort of modified stuff since you posted this preliminary design idea but to me, it seems just logical however tell if you have other ideas now)

I think it's also time to do a general clean-up and get rid of all the "loose" or "raw" geometry of our original stand box so triple click somewhere on it (all connected geometry will be selected) and delete all.
(Note that after finishing at later steps, I noticed that there was still some loose geometry here and there - which was obviously not connected therefore not selected but can be deleted later as well).

Okay, I think it is also time to deal with that huge, concrete slab. We practically symbolised it with a 2D side panel so far but it finally needs to be 3D now. So let's pick one of the side panels (logically and modelling-technically the one from the exploded front side is the most practical) and make it unique so that when we edit it, the other three instances all around won't be edited at the same time. It would not be a problem (as later below you will see that we'll delete those) but more comfortable now.

After making it unique, PushPull it to the end, snapping it ti the edge of the back panel.

Do the same with the sides - snapping them to the edges of both the right and the left side panel (only one side is shown in the picture but do it the same way on the other side).

A tip here: the PushPull tool will "remember" the value of the last PsuhPull operation. Here it is not too difficult to snap to the geometry but you can test how it works: on the other side just double click on the side face of the concrete slab and it will PushPull exactly the same amount as on the first side.

Finally, as we do not need them any more, let's delete those side panels which has been "symbolizing" our concrete slab in 2D in the side components. By editing only one instance of the three side components and deleting it from there, all other instances will be deleted, too (this is why components are handy).
We do not need them any more (unless you want to have them as some kind of "cover" on the concrete slab but then the make unique operatin should be done differently above - so tell if that is the case).

And finally the file as I have it now (note that I deleted some more loose geometry I found later and that I mentioned above).

Learning-Dome-Jan-27.skp

D0me · 28 Jan 2010, 08:09

Hi Gaieus

I'm on track.
I did make a small change. I pulled the concrete slab entirely over the legs and square bar.

@unknownuser said:

I guess we do not need these three parts in the front (although I am not sure at this point because we have sort of modified stuff since you posted this preliminary design idea but to me, it seems just logical however tell if you have other ideas now)

Well there is 2 more addition to the front.

is an extra piece of square bar 3 inches above the bar that is already there.
I'm considering having a covering over the entire front that can be removed to allow me access to the inside. More like a roller shutter or door. What suggestions do you have?

Thanks

Learning-Dome+Stand (Cylindrical By D0me).skp

Gaieus · 28 Jan 2010, 11:09

Well, if we add an extra bar 3" above this is what we get. Is this what you want? (Also we will still need some kind of a bottom for the base box but that's easy to add any time)

D0me · 28 Jan 2010, 12:22

Hi Gai

@unknownuser said:

Is this what you want?

Yes, that looks perfect and we'll definitely need a bottom for the box.

Thanks
Regards
D0me

Gaieus · 28 Jan 2010, 12:51

Well then, it is very easy - just Copy-Move (Ctrl + ) that bottom bar up (lock on the blue axis is either the UP or DOWN arrow key). It doesn't even need an image now I guess

I will put some easy things together for that bottom (my version does have that bottom already)

ely862me · 28 Jan 2010, 12:58

I thought u re building a plane here .

Great lesson Boss!(u couldn t have done that without a diligent student like D0me)

All the best!

Elisei

D0me · 28 Jan 2010, 14:14

Hi Gai

@unknownuser said:

It doesn't even need an image now I guess

Definitely no need for that. You've made me a pro amongst all beginners now.

@ely862me said:

I thought u re building a plane here .

Great lesson Boss!(u couldn t have done that without a diligent student like D0me)

All the best!

Elisei

I couldn't have done is without a concerned teacher like Gaieus. I've made so many mistakes along the way, but his patience kept me going.
Building a Plane, well that's next, right Gaieus? lol

Gaieus · 28 Jan 2010, 14:18

Building a plane in SU?

That's a piece of cake!

[flash=600,480:23wug0ka]http://www.youtube.com/v/QO_D3ltOilk&hl=en_US&fs=1&[/flash:23wug0ka]

ely862me · 28 Jan 2010, 14:38

Wonderful...now,please,teach D0me do do it.
I think he can do it!

Elisei

Gaieus · 28 Jan 2010, 14:46

That's for the next semester.

ely862me · 28 Jan 2010, 15:01

U are very optimistic ... i would say..ahem..year? ..
Anyway i see him very receptive..he ll manage to learn sketchup sooner..or later .

Elisei

Gaieus · 28 Jan 2010, 15:05

That wing modelling is actually not too complicated if you look at it that way. Justin (the guy who does that) doesn't even use plugins too much (but of course, his workflow is very special in many aspects).

The tools he uses there are simply PushPull and Scale.

D0me · 29 Jan 2010, 09:07

Hi Gaieus

Currently, Chris is assisting me with further design options on the dome.
He feels that there may be certain flaws in my design and we are currently working and rethinking the design as a whole. I would really like your input as well.

Thanks

Gaieus · 29 Jan 2010, 09:14

Hi D0me,

Yes, I have seen those posts. Whenever someone more knowledgeable in actual, practical implementation of such a project (remember, I am not an architect at all) comes up with any good idea how to modify the plan to be absolutely fool proof, we can do that.

I read the hole on top, the bevel ideas and such (and I know where I would start with them just waiting for some final judgement)

D0me · 29 Jan 2010, 09:40

Thanks Gaieus

D0me · 10 Feb 2010, 07:30

Hi Guys

It seems like such a long time since last posting here.
Actually feels like something is missing from my daily routine.
I trust all are well.

I need some assistance.
I need to calculate the surface area and volume of my dome as it stands right now.
The reason for this is I need to know how much of cement I require to build this dome and the only way for me to know this is if I know the surface area of my dome. Also guys, don't forget to take into consideration the opening in my dome.

Do you'll by any chance have a formula for this and can you'll assist me with doing the dome size as it is in this thread as an example so when I redo this whole exercise, I can follow the example.

Thanks
Regards
D0me