All posts relating to Maxwell Render 1.x
User avatar
By NicoR44
#92890
Strange thing happening,

Tom maybe you know what is happening here

When I export this test model from Rhino as *.3ds and open it in RC it seems that it has turned 90°

One other thing, all my objects meshes seem to be flat shaded ( I think this is because it is a exported Rhino model to *3ds?)

Look at this screen shot:

Image
User avatar
By Mihai
#92894
The rotation is most likely due to differences in coordinate systems, perhaps Rhino considers Z axis as up? In Maxwell Studio, Y is up.
Last edited by Mihai on Mon Dec 05, 2005 2:25 pm, edited 1 time in total.
User avatar
By tom
#92919
Yes, these are problems with the differences of coordinate systems and they will be fixed by the file format improvements.
User avatar
By Leonardo
#92929
NicoR44,

Is that a chiken??

the .Obj export have a seting that says: "Y up"... 3ds does not
By JDHill
#92932
NicoR44 :: just a FYI - this is a function that the Rhinoll plug-in was taking care of for us. In the SDK, it explains that the different CAD programs use different axes as *up* :)
By paxreid
#92949
This happens for anything imported that doesn't go through a plug in for me. I have just changed the transformation setting when exporting to get it right until the fix it.
By Hugh
#92984
Mihai Iliuta wrote:The rotation is most likely due to differences in coordinate systems, perhaps Rhino considers Z axis as up? In Maxwell Studio, Y is up.
What? 'Y' is up? Is this delibrate then? I thought is was an oversight in Studio and reported it as a bug! Is it the intention to ignore the 3D convention of Z being up? If so why? whats wrong with it? Does Y provide less resistance to gravity and thus greater performance?

Does this really mean that every object I import from any other 3D program (cause I've never come across one where Z isn't up) will have to be rotated 90 degrees? Oh come on, jeez louise!! Z is up, Z is up,Z is up,Z is up, Join in everybody......
User avatar
By NicoR44
#92987
That clears it up Thanks Tom and all :D

Leonardo, yes chickens :wink:
Image
User avatar
By NicoR44
#92988
Ow, one for the bug list:

shouldn't text be always on top?

Image
By JDHill
#92997
Hugh wrote:Oh come on, jeez louise!! Z is up, Z is up,Z is up,Z is up, Join in everybody......
I'm in the Western Hemisphere. Where are you? Which way is up? :wink:

~JD
User avatar
By Mihai
#93000
Hugh, I'm not sure if you're joking a bit or not :P 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.
User avatar
By tom
#93016
Mihai Iliuta wrote:Hugh, I'm not sure if you're joking a bit or not :P 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.
Can't be said better :D
...also I agree JDHill ;) This reminded me the old Galactica series. There were spaceship pilots loosing control and going down according to camera space. :lol:
User avatar
By max3d
#93017
I totally agree with Mihai. Never understood why so much 3d apps turned the world around. Z is depth by definition and x,y on the two axis of your screen is the most natural way to envision 3d.
User avatar
By Frances
#93027
max3d wrote:I totally agree with Mihai. Never understood why so much 3d apps turned the world around. Z is depth by definition and x,y on the two axis of your screen is the most natural way to envision 3d.
It could have something to do with 2d drafting conventions. The cartesian coordinates in plan view show the Y-coordinate up and X to the right. When 3d came along, Z became the direction to indicate thickness or height.

Hence, everyone who has an AutoCAD background is schooled in the convention that Z represents thickness or height. Likewise, those who have written plug-ins or 3d apps that relate to AutoCAD have carried on the convention.
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