Hi all, The result of my Delaunay triangulation on 1000 unifomally random points doens't look right at all (see image). Some points seem to belong an abnormally high number of triangles... Any idea? Thanks Detail: CGAL 3.4, windows XP This is the types I used: typedef CGAL::Exact_predicates_inexact_constructions_kernel K; typ...
I have a smart pointer type, and would like to construct an object that takes a pointer of that type and a count (dynamically calculated at runtime) and allocates enough memory from the stack to hold that many instances of the object the smart pointer points to. I can't seem to find quite the right syntax to achieve this; is it possible?...
I just reorganized the code for a project and now I'm getting errors I can't resolve. This header is included by a .cpp file trying to compile. #include "WinMain.h" #include "numDefs.h" #include <bitset> class Entity { public: Entity(); virtual ~Entity(); virtual bitset<MAX_SPRITE_PIXELS> getBitMask(); virtual void ge...
Windows API has a set of function for heap creation and handling: HeapCreate, HeapAlloc, HeapDestroy and etc. I wonder what is the use for another heap in a program? From fragmentation point of view, you will get external fragmentation where memory is not reused among heaps. So even if low-fragmentation heaps are used, stil there is a f...
I have a C++ project (VC++ 2008) that only uses the std namespace in many of the source files, but I can't find the "right" place to put "using namespace std;". If I put it in main.cpp, it doesn't seem to spread to my other source files. I had it working when I put this in a header file, but I've since been told that's bad. If I put it...
I'm having a tricky debugging issue, perhaps due to my lack of understanding about how c++ manages memory. The code is too long to post, but the essential setup is as follows: global_var = 0; int main() { for(i = 0; i < N; ++i) { ClassA a; new ClassB(a); // seems to be problem! } } For some N, global_var gets corrupted (i...
Hello, I have written some JNI hooks into a C++ library and created some DLL files for my java server project. Lets say the DLL and jar files are in the same folder under "C:/server" I am accessing these DLL files using: System.loadLibrary("someDLLFile"); in the class that needs the C++ code. The problem I am running into is when I...
My CFormView-derived class is structured as follows: class FormViewClass : public CFormView { ... FormViewClass(); void Initialize(); virtual void OnInitialUpdate(); ... }; Ideally, I would like to call the Initialize() function in the body of the constructor as follows: FormViewClass::FormViewClass() { ...
I've been looking at a Qt tutorial which uses a construction I haven't seen before: (void) new QShortcut(Qt::Key_Enter, this, SLOT(fire())); (void) new QShortcut(Qt::Key_Return, this, SLOT(fire())); (void) new QShortcut(Qt::CTRL + Qt::Key_Q, this, SLOT(close())); I've tried this without the (void) and it still compiles and works, s...
Hello, all, I'm using rdoc to generate documentation for my Ruby code which contains C-extensions, but I'm having problems with my method arguments. Rdoc doesn't parse their names correctly and instead uses p1, p2 etc. So, first off, my extensions are actually compiled as C++ so I have to use function definitions that look like this: ...
I'm trying to create a message validation program and would like to create easily modifiable rules that apply to certain message types. Due to the risk of the rules changing I've decided to define these validation rules external to the object code. I've created a basic interface that defines a rule and am wondering what the best way to...
I came across How to convert XML to JSON in ASP.NET C# (link) and one in javascript (at goessner.net/download/prj/jsonxml/). But have yet to find one in c++ that takes just a string as input (Or a tinyxml node as I'm using that library). ...
I just fixed a memory leak caused by someone forgetting to call the superclass's OnUnload in their override of it. The superclass version frees some resources (as does its superclass). Are there external static analysis tools, or at least some kind of runtime trick I can do to detect this? With the ability to make an exception obviously...
This program takes 2 numbers from user input, asks them whether they'd like to find out the permutations or combinations, and then outputs the result. Here's the code. #include "std_lib_facilities.h" int permutation(int first, int second) { int top_fac; int bottom_fac; for (int i = first-1; i >= 1; --i) top_fac *=i; for (int i2 = (...
Hello :) I'm trying to write my first iterator class / container type. Basically, I want to be able to iterate though a file, have the file converted to HEX on the fly, and pass the result into the boost::xpressive library. I don't want to do a one shot conversion to a string in RAM, because some of the files I need to be able to proces...
Hello everyone, This is my first post on Stack Overflow and I'm just wondering on the options of making a system tray application. The application would run primary from the system tray while still operating, and could be brought up into a window when clicked on. It is also needed to have some support for global keystroke tracking, to b...
I have asked this problem on many popular forums but no concrete response. My applciation uses serial communication to interface with external systems each having its own interface protocol. The data that is received from the systems is displayed on a GUI made in Qt 4.2.1. Structure of application is such that When app begins we have ...
Consider the following: typedef struct { int a; int b; int c; int d; } ABCD; typedef std::vector<ABCD> VecABCD; Say I wanted to add up every 'a' member in a vector of type VecABCD. Easy! I just loop through the vector, and sum as I go. int CalcSumOfA(const VecABCD &vec) { int sumOfA = 0; VecABCD::const_iter...
I'm trying to profile a C++ application with gprof on a machine running OSX 10.5.7. I compile with g++ in the usual way, but using -pg flags, run the application and try to view the call graph with gprof. Unfortunately my call graph contains all zeroes for all time columns. The values in the "called" columns have reasonable values so it...
Why does the derived class have to declare its methods as virtual for dynamic binding to work even though the methods of the base class are declared virtual? ...