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I have a little trouble here with the 'simple' box command.
The syntax help in the IDE says: Left, Top, Right, Bottom, so
BOX 100,100,100,100 makes all the sides of the box 100 units, right? No it doesn't and I can see why, because in this case you won't tell the program WHERE the box should be drawn (no coordinates).

In the helpfile, though, another explanation is given:
x1, y1, x2, y2 are what the numbers will tell the computer.

Here comes the confusing part: if it's x1,y1,x2,y2 won't you only have 2 coordinates on-screen?
x1,y1 defines one point on-screen and x2,y2 the other, so how does this translate into a box? As far as I can see this would make a line instead of a box.

Looking a bit further I came across the 'The Basics of DBPro Tutorial' by Joseph Thomson (very good by the way!) and he says the box command: "(...) The box has the coordinates of the opposite corners (...)", still this doesn't make sense if you only have two x values and two y values, which would implicate only two coordinates on-screen as discussed above...

Obviously I am overlooking the obvious, but I seem to be running around in my own thought circle here, could someone please shed some light?

A box is just a rectangle. A rectangle has 90 degree angles and perpindicular sides. So the first set of coordinates is the opposite corner of the second set. When drawing a box you do technically need 4 sets of coordinates, but 2 sets of coordinates will always follow a pattern derived from the the two main sets.
For example, 0,0,10,10 would be:

(0,0),(10,10)
If you've ever used qbasic you would recognize that this is very similar to LINE (0,0)-(10,10),B where the B tells the interpreter that instead of making a straight line, you want to make a box.

If you had to specify 4 points to make the box, you would end up with 0,0;10,0;10,10;0,10 but since you know it's a box, you can rule out the 2nd and 4th set, b/c the compiler will know to derive the missing coordinates from the sets given.

Yes, the first set of coordinates is the top left corner of the box, and the second set are the bottom right coordinates.

IF you want an unfilled box, use (or make) a function like this:



And call it like this:

i think the triangle command is confusing!

MAKE OBJECT TRIANGLE Object Number, X1, Y1, Z1, X2, Y2, Z2,
X3, Y3, Z3


??

Basically the X1,Y1,Z1 coords are the point in space where the first vertex should be, X2,Y2,Z2 where the second should be, and X3,Y3,Z3 where the third and final vertex should be.

Now this makes sense!
Thanks for all the feedback.