[max3d]

The first modeller we ever wrote (commercial in 1988!) had an x/y top view, 3ds max still has. It are just parts of the CG industry who went nuts.

[tom]

XZ

So, if Y is the 3rd dimension, it's out of order.

Shame on you Tom. I thought Math was your Alpha and Omega.

Loooooooooooool... I was refering your(!) Z
You would be a good attorney Fran. heheheh
...and no it was originally like this "In Math We Trust"

[stonelli]

The rotation is most likely due to differences in coordinate systems, perhaps Rhino considers Z axis as up? In Maxwell Studio, Y is up.

Why? from the day we learn the rudiments of geomtry we think of Z as up..
I know that some of the mechanical programs work in front view, so Y is up, but if Studio is to succeed as a Standalone it needs to be oriented the way one expects it to.
If you are pulling in a DXF that you did in a CAD program like AutoCad or MicroStation you expect the model to have Z for the height. Maybe the best thing would be for Studio to adjust accordingly, by asking where the DXF came from, if it can't automatically detexct the proper Z direction.
regardless, I find it really weird to thik of Y as my up dimension so, at the very least, some visual help, like tagging the coordinate boxes and adding an XYZ tripod in the views (or the option to have one) should be provided....
Ciao

[stonelli]

The XY is always the 2d space in any science
convention that I know of.

In school when drawing on the blackboard XY always denoted the 2d planar coordinate system of the board and anything imagined to stick out (or inward) perpendicularly was referring to Z-height. (This was true even though the board itself is situated vertically... it is a virtual space where XY is always the working plane that corolates to the earth surface.)

The plane of the board corresponded to the idealized planar surface of the earth (if the earth is considered flat for infinitesimal distances). Also, in math all 2d equations are in XY terms.

So when looking down from the top, we are looking at XY. True enough, in Rhino, looking down from the Top viewport there is XY. (Thankfully)

IMHO it is the CG industry that attempts to go against convention and against the grain.

Yes, absolutely, so Studio should also have Z as its height coordinate

[giacob]

Hugh, I'm not sure if you're joking a bit or not but, Z makes much more sense in 3D to be the depth axis, think Z buffer for example, a very old concept. A 2D graph doesn't have X and Z axis does it? It has X and Y. So the third axis naturally should be Z. XSI also uses Y as the vertical axis and I think also Modo.

what u say doesnt make much sense in my opinion... z as vertical axis is not just a autocad convention.. in any geometry book the height is represented as the z axis.. is the logical consequence of the 2d graph u mentioned .. usually the paper is put orizontally on the desk ( unless u write with the paper set vertically which is possible but a bit unconfortable) .. so the x-y axis rappresents the desk plane, that is the orizzontal plane ... as a conquence the height axis is necessarily vertical... so x as the vertical axis is a new maxwell convention (trying always to distinguish itself) and make just sense a bit for the question of zeta depth....
anyway.... if u consider the monitor screen .. x and y are the top plane ( which in reality is set vertically and has not the same position of a top plane ) and u are right but this a bit twisted way of thinking...u take the screen axis ( local coordinate system) as the world coordinate system.. we ( as most of the world do) consider the world coordinate system.. as...as ...the world coordinate system..
reverting widely shared conventions make sense only for very good reason...

[Mihai]

No giacob, it's not a convention of Studio, it's a convention of 3D graphics in general.

Taking your example, lets say you sit at your desk and draw a gasket in 2D, you've already used your X and Y axis. Now what if you want to give this piece thickness, depth??

So the Z axis came naturally from taking a 2D drawing and looking at it from the top, turning it into 3D, giving it depth.

u take the screen axis ( local coordinate system) as the world coordinate system..

Replace the word screen, by the word paper, and perhaps you understand where the idea came from.....

Anyway lets not talk this to death, there should simply be an option to decide which axis is supposed to be the vertical one....

[giacob]

yes this is that kind of endeless dispute such as "2000 is the last year of 2 millennium or the first of 3 millennium?
( couldn resist: world coordinate system is not not the paper coordinate system which is another local coordinate system .... worlld coordinate system is set by gravity direction)

[hyltom]

As I don't want to redo the world in 3D inside my 3D software, why do I need to used the world coordinate system blablabla... why not use a local coordinate system.
If this is a problem so please give me a solution to that :
Why english people drive on the left side, used pound, miles, inch...?
And i really want to know that one:
Why chinese used chopsticks?

May be I shoulde make another topics for these questions

[stonelli]

Giacob, Mihai. I think you are both saying the same thing. Giacob's ehight is Miahi's depth.
Any way I think http://en.wikipedia.org/wiki/Cartesian_ ... ate_system
rules

[hyltom]

Can someone tell me what wikipedia say about the CARTESIAN COORDINATE SYSTEM.
This website is blocked in China.

[Maximus3D]

Yep, here you go. Took a screenshot of it for you click on the thumbnail to get the full picture.



/ Max

[hyltom]

Yep, here you go. Took a screenshot of it for you click on the thumbnail to get the full picture.

Thanks Max.

[Mihai]

This website is blocked in China.

I would like to protest....but that would mean throwing out 97% of my stuff....

[hyltom]

This website is blocked in China.

I would like to protest....but that would mean throwing out 97% of my stuff....

No, no...please keep quiet or they will blocked this forum...I'm scare...shuuuut!

May be they don't care to know the answer of the coordinate system.
Now i know why they just send some man in the space. They was confused by Z and Y axes.

[SMB]

No, no...please keep quiet or they will blocked this forum...I'm scare...shuuuut!

May be they don't care to know the answer of the coordinate system.
Now i know why they just send some man in the space. They was confused by Z and Y axes.

And, would it be possible for you to have a satellite internet connection and another provider outside of china, or would and how could the government object ?

steff