Join Date: Dec 2007
Thanked 147 Times in 143 Posts
it's something we instinctively know once hearing an explanation. it's obvious to me so my explanation might not be the best.
but i'll try explain it to you and hope i explain it well enough that you understand
in 3D space there is the x axis, y axis and z axis (you should have heard of x and y before in math class when you started high school at least.. provided they still teach that stuff when you went)
in the case of maya x points from left to right
y points from down to up
and z points back to forward
a plane is a flat surface
a coordinate for a point (vertex) is something like this: (x, y, z), where x, y, and z are real numbers (there are such things as imaginary numbers but you dont need to worry about that) and represent the space that the point is in. so a point at (0, 0, 0) is directly in the middle of the world
in the attached picture i have 3 planes
the red plane's verticies are all on the 0 coordinate of the x axis. it is on the y-z plane because all of its points have a 0 coordinate in the x.
the green plane's verticies are all on the 0 coordinate of the y axis so it's in the x-z plane.
the blue plane's verticies are all on the z coordinate of the y axis so it's in the x-y plane
in the second part of the attached image the arrows point in the positive direction.
to 'mirror' something in a x-y, y-z, or x-z plane is to make of copy of all the verticies of the object
you mirror something in the negative y-z plane then you take the object's verticies and you (for lack of better word) translate them to the other side of the y-z plane
if you don't understand what i said then that's because it's obvious to me after seeing the 3 planes and knowing which way the axis are going (and it might be to you once you know what just happened)
but i hope you get the idea of what i said...
if you don't get it then just bash the buttons away until you get the result you want (i do that most times)!
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D