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University of California, Berkeley EECS Dept, CS Division |
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| Jordan Smith |
SLIDE: Scene Language for Interactive Dynamic Environments |
Prof. Carlo H. Séquin |
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Hungarian Notation is a naming convention, invented by Charles Simonyi, which encodes things about a variable's type (and perhaps its intended use) in its name. The SLIDE code uses a variation of this Hungarian for naming all of its variables and enumerated types. Variable names might look confusing at first, but once you learn the naming convention you find that it aids in understanding new code without having to do a lot of look ups into the header files.
A standard C++ member variable might have a name like
m_uiVertices. This should read: member variable
(m_), unsigned (u) integer (i) number of
vertices (Vertices). The following table gives a list of the common prefixes
used in the SLIDE source code:
| Prefix | Meaning |
|---|---|
C |
C++ class variable |
m_ |
Member variable of a class |
g |
Global variable |
s |
Static variable |
p |
Pointer: there may be N of these in which case it will take N
dereferences of the variable (a combination of *'s on
the left or [index]'s on the right) to get to
the actual data value. |
u |
Unsigned |
c |
Character if used on the far right, or constant type if used on the far left |
b |
Boolean |
i |
Integer |
f |
Floating Point |
d |
Double |
v |
Void |
fp |
File Pointer |
e |
Enumerate value variable |
?t |
Used in the front of Enumerated value constants means whatever type |
pt |
Point class object |
v |
Vector class object |
m |
Matrix class object |
mGa_b |
Column Vector Matrix: Pa = mGa_b * Pb |
Because the Hungarian Notation has been such a benefit in C++ coding, we also use it regularly in SLIDE .slf geometry description files. We use a similar set of prefixes for the identifier names of different SLIDE geometry objects. The following table gives a list of the common prefixes used in the SLIDE .slf files:
| Prefix | Meaning |
|---|---|
s |
SLIDE Surface |
p |
SLIDE Point |
f |
SLIDE Face |
o |
SLIDE Object |
g |
SLIDE Group |
i |
SLIDE Instance |
c |
SLIDE Camera |
l |
SLIDE Light |
vp |
SLIDE Viewport |
win |
SLIDE Window |
This page was originally built by Jordan Smith.
Last modified: Friday, 12-Feb-1999 12:10:25 PST