X,Y Coordinate System?

[dflw]

Hello,

Can someone please post a link to a good tutorial on the XY Coordinate system? Thanks for any help!

[hypnos]

Sorry I have no link myself. I'd just like to tell you, it's a very basic system. These are the key points:

X = Horizontal
Y = Vertical

The coordinates 0,0 are always (unless you rotate it :)) in the top left corner of the screen. The higher the X value, the further to the right you will be and the higher up the Y scale, the further down you will be. Not much to it. Sorry I don't have a link to a tutorial though.

[hypnos]

I've just made a real load of crap for you, which is my attempt at explaining the XY coordinate system ;)

[Whiteblitz]

How do I rotate the axis where the bottom is 0 and the right side is 0?

[cyborg]

what are you going to use it for?

[cyborg]

im having a class in autocad right now...just some minutes before this class i had maths with some coordinate-stuff!
but that was no fun!:mad:
i allready knew all that sh*t!:mad:
i wanna learn some new stuff!:)

gimme knowledge!!!:) :D

[Whiteblitz]

a 3d map editor.... i have to draw reversed and upside down with it the way it is.

[plenderj]

3D uses an X, Y, Z co-ordinate system.

The basic idea is the same, that each of the values describes a point in space, but you can normally swap them around because you can rotate.

If you're rotating, depening on how you're doing the rotating, you should display (like most 3d programs do), a little 3 lined shape in the corner showing which directions the 3 co-ordinate descriptors are in.

So normally its X goes left to right, Y goes at ninety degrees to X on the same plane, and Z goes 90 degrees up in the air from that plane. So if you take that odd shape, then when you rotate everything, you should rotate that too to show where/how everything is orientated.

Here's a 3d map editor for quake that does that.
Source code too :
http://www.qoole.com/download.shtml

[Zaei]

I have always found that, since Y is UP in 2D space, it should also be UP in 3D. If you draw a 2D plot on paper, and then draw the Z axis, Y is still UP =P.

Z.

[Whiteblitz]

[Whiteblitz]

Maybe this should help explain what I'm asking about