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Programming project
Semester II, Physics session
Introduction:
The purpose of this project is to learn how to
symulate a physical system and, eventually, implement
it using a 3D graphical engine.
The programming language used is the C++.
A graphical representation is written
using the OpenGL engine powered by a Qt window manager.
Members: Raffaele Ancarola, Armando Cincotti
Goals:
I) Numerical symulation of a simple system (ex. a pendule)
II) Describing a more complex system (ex. damped harmonic oscillator)
III) The symulation of a particle system (always numerically)
IV) Graphics setup (Qt and OpenGL)
V) The transposition of older symulations into a graphical representation
Coding rules:
- The content of a .h file must be bound by a #ifndef MACRO block in order
to prevent compilation conflicts, for example:
#ifndef __MYFILE_H__
#define __MYFILE_H__
/* My content */
class MyClass
{
/* Class content */
};
#endif // __MYFILE_H__
- Class names must begin with a capitalized letter, for example:
class MyClass
{
/* Class content */
};
- Namespace, structure, variable and function names must NOT begin
with a capitalized letter, for example:
void eraseAll();
int foo = 0;
double _time;
struct boundingBox
{
/* Struct content */
};
- Warning!
Few and well structured classes is better than
a lot and small ones.
Which means that inheritance is powerful and, for this reason,
it is easy to abuse too.
- Reminder of Chappelier: Never, NEVER copy-paste implementation code
Use functions, classes, inheritance, pointers instead
- Keep strict order in your code
Remember that your partner have to be able
to fully understant your code, so there are some tips:
- TAB INDENT SET TO 4 SPACE CHARACTERS
Your partner could use a different editor than yours,
so taking fixed the Tab indent size to "4 space characters"
is good in order to read the same text in the same vision
- EXPLAIN WHAT YOU ARE DOING
C++ allows you to comment your code.
In some complex situations understanding a plain code
could be much complicated for other people.
Another reason to comment your code is that it speeds up
debugging. Sometimes making an important change to the code
could cause confusion onto other parts of the code, so commenting
your code is useful to find faster an error and fix it better.
For example:
/* Set the delta time */
void set_dt(const float&);
extern int error; // global error code
- MAKE NAMES NOT TOO LONG
Avoid very long names.
Even if more comprehensible, use shorter names and eventually
comment to explain them.
- INDENTATION IS IMPORTANT
Indentation style if free, but it must be fixed, ordered and logical.
Some examples to write the same thing:
- KEYWORDS USAGE
float hello(const int& entry);
float
hello (int const& entry);
- LOOPS
for (int i = 0; i < 100; ++i)
{
/* Content */
}
for (int i = 0; i < 100; ++i) {
/* Content */
}
int i;
for (i = 0; i <= 99; ++i) {
/* Content */
}
- CONDITIONALS (4 spaces indent template)
if (s == "hello") {
s = "_hello_";
} else if (s == "_hello")
s += "_";
} else {
s = "_none_";
}
- NESTING (4 spaces indent template)
if (enable)
{
for (auto obj : objects)
{
if (obj == 0)
continue;
else
return obj;
}
}
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