Hello World! I'm talking about positioning objects in Alice3.
and in particular I would like to position objects so they are stacked on top of each other.
I've searched for box and I'm going to add three boxes.
Let's name that box1, and another box, name that box2
and another one will be box3.
I would like them to all be the same size
so I have a width and height and depth
for one of the boxes, and then I have the same dimensions
for the next box and the next box
but of course, they have different x, y and z values.
If we drag this around in the room,
you'll see that the x and z values change.
The X is the left to right movement
and z  is the is the front and back.
You notice that y didn't change, and that's the up-down movement.
To make it just a little bit easier to talk about these boxes
I'm going to color them different colors.
Let's make one cyan and one of them red
and one of them  yellow.  Yellow doesn't show up, let's make it green.
That one looks the same, let's make this one blue.
Okay,  we have three boxes and I would like to
put all the boxes that we now confirmed
are the same size, I would like to put them on top of each other.
I'm going to make my red box the bottom of the stack
and then I want to put the green one on top of that.
So I need to lift it up, and then move it over,  and then I'm going to do the same
blue box, put it on top.
Now, they should all have the same x and z position,
but different y positions
so the red box has a 1.09,
I could just copy that and paste it in
for each of these.
Pressing enter each one.
and that doesn't look like it's on top but maybe it's because the z value is different.
so this is -0.24.
Let's copy that value to each of them, and this one.
Ah!  It was farther back.  So let's move that down now a little bit.
And we could zoom in a little bit to get a better view of that.
Another thing we could do would be to make one of our boxes
a little bit transparent.
I'm  going to set that .5 so you can see that little better.
Maybe set this one, I probably will have to change that back after I get them stacked up.
You could try that that's just one of the tricks.
Zero would make it completely invisible.
So if we go back to 1, that's going to make it not translucent  at all.
I'm  going to change my camera view. I would  like to look at the
starting scene view and I can look at that and
again change my angle, I'm trying to see if they are stacked on top of each other.
I can also go to the top view. It's a little hard to see, let's see if we can zoom in on that.
They look like they're in the same position. We can look at them from the side, now from the side
they look like they're a little bit off and they look like they are intersecting so
Let's move this one up just a little bit more.
and this one move up just a little bit more, and then we need to move it over a little bit.
That  needs to go up just a little bit more, and we could fiddle with this.
so we can check that X, Y, and Z values,
We can change the view: let's look at it from the front.  That looks okay.
and go back to our starting camera view and they don't look too bad.
and you could use these techniques for putting a microwave on the countertop
or building a castle that has several parts and so on.
and when were finished we probably want to make sure we set all of those opacity back to
what we wanted and I only change these colors so we can talk about them.
White was that default value that looks like I cardboard box.
So I'll put those back to white also and then, of course in my code
I would refer to them as box 1, box 2, and box 3.
And that's it!