Coordinates?

I don''t think I understand the question

First i apologize for my poor english but i''m italian
I''ll try to explain what i mean.
Imagine that you have a cube at the middle of the screen, you don''t kown his vertices coordinates, how you can get the coordinate of every vertices?
Tnx to all

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That would be hard. I think.

But if you are looking for a way to "generate" coord''s for a square for example, thats quite possible.

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So there isn''t a function that return the coordinate of a vertex
Tnx to all

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I''m confused

To have a cube in the middle of the screen you would have to already know the coordinates of each of its vertices. If you have a program drawing a cube in 3D (OpenGL, Direct3D, Sofware renderer) the coords of the cube HAVE to be in there somewhere, in some form.
So it follows that you could obtain access to that data. What''s the situation?

Stop me if I''ve totally missed the point

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eheheheh it''s hard to explain when you have a poor english I''ll try again

For example if you have a level editor, you begin with a empty level, then you create a cube, now for saving the coordinates of the cube, what i have to do?

Tnx to all for the patience that have with me
Byez

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For anonymous: Yes i mean screen coordinates

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What you say is right, but if move the cube in the level editor, i lose it''s originary coordinates.
How i get the new coordinates?
I know that isn''t simple to explain but i''m trying to do my best
Bye

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Is this a level editor that you are making?

If you move the cube, don''t you know where it goes to? How is the location of the cube stored? Just as a position to center of cube? to one corner? If you know the dimensions of the cube, which you should in a level editor, and you know the location to either the center of the cube or one corner then it is easy to calculate it vertices. Are you missing the size? Or does your editor not store where a corner or the center of the cube is?

Yes, i''m trying to make a level editor (very difficult stuff for me )

What you are saying is right, but if i move the cube with the only mouse without entering a value for the translation, how i can know the new coordinate of the cube?
Someone tells me about the feedback buffer is this right?
Tnx

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