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Google Sketchup - Come Along for the Ride #16: My saga continues -- really starting to get some ideas now though

Blog entry by Betsy posted 478 days ago 277 reads 1 time favorited 4 comments Add to Favorites Watch
« Part 15: Hall table redo -- just putsing along - and questions, course Part 16 of Google Sketchup - Come Along for the Ride series Part 17: Hall table - drawers -- not a good start »

As with any new thing – it’s a stop and start learning experience. Yep. Still working on the hall-table-drawing. Getting a lot of great help from Dave and David – thanks guys.

So now I’ve started again with the legs. I’ve come a long ways from just a simple rectangle on the ground – but it’s a long way from a fancy turning. But that will come in time. (I promise that I won’t start from the beginning every single time I blog—- but right now it makes sense to me.)

The table leg is 1.5×1.5×28. Mortises are ½” deep x ¼” wide x 3” long centered on the leg.
The legs on the short side are 12.5” apart from outside to outside.
The legs on the long side are 39” apart from the outside to outside.

Start with the basic rectangle and size as stated above. It’s a good idea to check dimensions as you go (unless, of course, you are designing on the go). I’m working of a model so I know my dimensions which makes drawing easier. You can adjust dimensions as you go, but I’m not so good at that yet.

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To insert dimensions use the dimension tool (looks like a three sided box with a “3” at the top and slashes through the corners) – click once on a corner or edge then move your mouse to the opposite end click once and move your mouse to the side. You should see something similar to my picture above.

Next make the leg a component. Anytime you are going to make more than one of anything, make it a component.

Select the leg by triple clicking (should be entirely blue) then right-click and chose “make component”. Name it whatever you choose – I choose “leg.” (very original I know.)

Now the fun starts. Because you’ve made the leg a component anything you change on the component will be made automatically to all copies of that component.

As in woodworking with the actual wood there are a dozen different ways to do everything. Drawing is the same. You have to be able to see what you are drawing in your mind’s eye. It seems like it is a ton easier to draw the mortises on the top of the leg because you don’t have to spin the leg around to see each side.

Draw in the guide lines by using the measuring tool. For my purposes, I’ve drawn lines at 5/8 from each side and in from the inside edge ½”.

Then use the rectangle tool to draw in the rectangle and use the push/pull tool to push the rectangle down 3”. Do the drawing guides on both edges and draw the rectangle twice. But the nice thing about the push/pull tool is that that second push/pull can be accomplished with a double click. (Provided, of course, that you intend both to be the same.)

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Now to copy and then rotate/mirror/scale/flip the second leg. Four terms/methods to do the same job – so you have to find the one that works best for you. I’ve not managed to get the scale tool to work for me yet. The minus 1 thing escapes me. The rotate tool has had me snagged as well – but I’m getting that by working on this project.

First start by selecting the leg by triple clicking (should be all blue). Then pick the move/copy tool and over the tool over the leg. Hold down the “Control” key at the same time moving the leg/copy to the right. As you slide to the right (or the direction you choose) you should see on the screen a light red dotted line along with “on red axis”

Continue moving to the right – make sure you keep the dotted line and on red axis showing – if that goes away that means that you are not on the same plane as your first leg.

Some other things to keep in mind. When you move the move/copy tool over the leg – if you position the inference dot over the top inside corner so that it says “endpoint” when you stop moving your copy over – if you type in 37.5 in the VCB box then it will automatically move the leg the required 39” outside measurement.

Also, once you start moving the copy – you can release the control key. As for the mouse key, the caveat with the mouse is that you can let go if you are going to type in the dimension you want. If you are going to place the leg precisely where you want it then don’t let up on the mouse until you reach your destination.

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You’ll notice in the above picture that the mortises are in the wrong direction for the right front leg. Not for long!

The easiest thing is to triple click the copy (the new right front leg) until it is all blue then right click and select “flip” “along the red axis.” Double check your dimension and it should still be at 39”.

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To use the scale tool——triple click then select the scale tool (looks like a diamond with a brown corner) – you’ll see a parcel of green dots on the leg. Move your cursor over the leg and watch how the dots are connected. That will give you some clues on how this works. Play with it some also. Just remember you can always undo what you don’t want to keep by using Edit – undo.

For our purposes on this project – move your cursor over the top middle dot.

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Then while holding down the Control key and the left mouse key – move the mouse to the left. Watch the leg turn inside out. Let go of the Control and mouse key and type in -1, 1 on your keypad and hit Enter. Check your dimension. (Now here’s a confession—- I can’t get this to do it twice. So not sure what I’m doing wrong.) Will have to keep working on it. And on and on.

If you are going to use the Rotate tool to reposition the leg – start again by triple clicking until it’s blue, select the rotate tool and hover – After that you’re on your own. Still have not got this one figured out.

For now though—- use that flip tool. That worked great!

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So now you have the two front legs with the mortises in the right directions and the right distance apart.

Here is something I did not know and, I suppose, is good to know for other computer programs (in my electronically challenged opinion) is that if you select one object and hold down the shift key you can simultaneously select a second object!

With that said, that’s what we do next—- select both legs so they are both completely blue.

Then pick up your move/copy tool, hover over one of the two legs and move up along the green axes – if you position the inference dot over the top inside corner so that it says “endpoint” when you stop moving your copy over – if you type in 11.5 in the VCB box then it will automatically move the leg the required 12.5” outside measurement.

Now you have 4 legs – albeit the second set of two with the mortises going in the wrong direction.

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OK that’s all I can do tonight. Here is where I’m headed. Although, this model has a lot of bugs in it, I’m getting there.

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-- You can't get a hug from Facebook.


4 comments so far

View Brad_Nailor's profile (online now)

Brad_Nailor

1224 posts in 855 days


posted 478 days ago

Looking good Betsy! Thats a cool thing about SU…I love how things come to life when you start playing with textures. I like the flip function..it’s an easy way to mirror parts. What is it about the rotate tool you don’t understand? Your first click is to anchor the protractor..that will be the axis the piece will rotate on. Then the next click you are kinda making a handle to grab to move the piece. Then just rotate the leg till its in the direction you want and click for a third time. Use the inferences to make sure your rotating at right angles.

-- David, South Windsor, CT "I love the smell of sawdust in the morning"

View DaveR's profile

DaveR

1527 posts in 618 days


posted 478 days ago

You are getting the hang of things, Betsy. Good on you.

Regarding the legs: In the case of your table you probably could get away with simply rotating the legs to get the mortises aligned as needed. Consider the case where the mortises are different on the different faces. Or suppose you decide to make the legs wider in one direction or add a detail on only the front face of the legs. As you edit one component, two of the others will be edited incorrectly. Using Flip or Scale to mirror eliminates that problem. I’ll make an illustration that shows that.

As far as using Scale to do the mirroring, instead of pushing where your illustration shows, use the handle indicated in these views, below. Hold Ctrl to invoke Scale About Center. I couldn’t show that with the screen grab.

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Your screen shots indicate that you haven’t made the leg a component prior to copying it. You should do that immediately before copying. This will keep the legs related.

The Copy function of the Move tool is a toggle thing. Hit Ctrl once to turn it on. Hit it again to turn it off. No need to hold it during the move.

Keep up the good work.

dave

-- Until you spread your wings, you'll have no idea how far you can walk.

View DaveR's profile

DaveR

1527 posts in 618 days


posted 478 days ago

Here’s a couple of examples. First, legs for two tables. They’re all instances of the same component. The original was drawn at the origin.

The four legs on the left were positioned and rotated so their mortises lined up correctly. The four on the right are mirrored copies of the front left leg for that table. They all look the same.

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There’s a larger version of this image at this link.

The next image shows what happens when a mortise is put in for a stretcher. The intent in this situation is to have only two stretchers; one between the front pair and one between the back pair. Then perhaps a shelf between the stretchers. (Or maybe we’re looking at these tables fromn the side and the stretchers will only run front to back)

Notice the location of the mortises in the four legs on the left. Kinda looks like we’re heading for some sort of M.C. Escher thing. And if you cut these in some rare and expensive wood like this, bad words would come out of your mouth.

With the mirrored components, all of the mortises are in exactly the right place.

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Again, there’s a larger version here.

-- Until you spread your wings, you'll have no idea how far you can walk.

View Betsy's profile

Betsy

2386 posts in 793 days


posted 478 days ago

Thanks Dave and David. I’ll work on this later tonight. And post more.

-- You can't get a hug from Facebook.

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