 | | | | | |
In lugnet.cad.dev, Roland Melkert wrote:
> X positive is right
> X negative is left
> Y Positive is top
> Y Negative is bottom
> z Positive is front
> z negative is back
I've always understood it is:
X positive is right
X negative is left
Y Positive is bottom
Y Negative is top
z Positive is back
z negative is front
In fact you can show this by adding a brick in MLCad and moving it around,
watching how the X, Y and Z values change.
ROSCO
| | | | | | | | | | | | | | |
As I understand it, LDraw has negative y in the up direction, which is neither
right nor left handed, but something else entirely. I don't know that it has a
name.
James
| | | | | | | | | | | | | | | | |
In lugnet.cad.dev, James Reynolds wrote:
> As I understand it, LDraw has negative y in the up direction, which is neither
> right nor left handed, but something else entirely. I don't know that it has a
> name.
>
> James
It is still a right-handed system. The handedness is unchanged by rotation (in
ldraws case 180*x from standard).
Tim
| | | | | | | | | | | | | | | | |
Tim Gould wrote:
> It is still a right-handed system. The handedness is unchanged by
rotation (in
> ldraws case 180*x from standard).
>
> Tim
So the original designer of the LDraw program just decided to use this
orientation of the right handed system. if so then it starts making more
sense to me, I just need to redefine 'front, left, right etc' to fit in
this orientation for editing.
I'll make it an option (LDraw orientation 'standard' orientation).
Because personally I find a upward negative Y very confusing, but I
suspect that the LDraw die hards are custom to it.
But in essence no changes are made to the coordinates (only the camera
position), so it doesn't really matter how you label the sides :)
Roland
| | | | | | |
