I downloaded the official example which is CGAL-5.2\examples\Triangulation_2 from the website CGAL.org.
I successfully cmake the examples.
Then I opened Triangulation_2_Examples.sln from G:\MyCGAL_code\code_1\Triangulation_2\build by VS2017.
I also successfully built all projects (without errors).
I then click the debugger in VS: the draw triangulation.exe running fine, but the Triangulation_2 Basic_viewer is empty.
I knew someone's successful results has colored triangles in the window called Triangulation_2 Basic_viewer.
Did anyone try this official example before?
The program draw_triangulation_2 takes a filename as input (the file must contains a set of 2D points).
Without parameter, it takes data/triangulation_prog1.cin by default.
Thus the working directory must contains a directory data and this directory must contains a file triangulation_prog1.cin. Otherwise, the triangulation is empty.
To solve your problem, you need either to create the data directory and copy triangulation_prog1.cin in this directory; or give a valid filename as parameter.
Related
I have an application that collects heart rate data and displays in in a GUI. I don't want to change anything about how the application runs, but want to save the data into a .csv file to use with data manipulation programs. The program is called BluetoothGattHeartRate. I am running the sample code found here.
My addition to the code is just
std::fstream theDump;
theDump.open("path/to/file", std::fstream::out);
if (theDump.is_open())
{
theDump.write("ImHere", 6);
}
theDump.close();
inserted into the file called HeartRateService.cpp in the Shared directory in the void HeartRateService::Characteristic_ValueChanged(GattCharacteristic^ sender, GattValueChangedEventArgs^ args) function just before the call to ValueChangeCompleted(heartRateValue);. I'm using Microsoft Visual Studio to edit and run the code, as the tutorial online says. This exact code succeeds in editing the file when run in an independent application, but it fails to open the file (I tested for this) when run in the Gatt sample code.
I don't expect that anyone has dealt with this before, but if by some miracle one of you has figured this out, please let me know how you fixed it.
[Project]
FileName=sjkabljt
Name=sukablyat
Type=1
Ver=2
ObjFiles=
Includes=
Libs=
PrivateResource=
ResourceIncludes=
MakeIncludes=
Compiler=
CppCompiler=
Linker=
IsCpp=1
Icon=
ExeOutput=
ObjectOutput=
LogOutput=
LogOutputEnabled=0
OverrideOutput=0
OverrideOutputName=
HostApplication=
UseCustomMakefile=0
CustomMakefile=
CommandLine=
Folders=
IncludeVersionInfo=0
SupportXPThemes=0
CompilerSet=0
CompilerSettings=0000000000000000101000000
UnitCount=1
[VersionInfo]
Major=1
Minor=0
Release=0
Build=0
LanguageID=1033
CharsetID=1252
CompanyName=
FileVersion=
FileDescription=Developed using the Dev-C++ IDE
InternalName=
LegalCopyright=
LegalTrademarks=
OriginalFilename=
ProductName=
ProductVersion=
AutoIncBuildNr=0
SyncProduct=1
[Unit1]
FileName=files\siplasplas\sukablyat.cpp
CompileCpp=1
Folder=
Compile=1
Link=1
Priority=1000
OverrideBuildCmd=0
BuildCmd=
this is what i get after i open the .cpp file....the file was supposed to get 10 numbers into a[x]; then display them from x+1 to x+10 and then from x+10 to x+1
after that make the sum of all the numbers, and then locate the min and max number....after the program was written i tested it and it all worked...then clicked the top left corner icon and clicked SAVE FILE AS, after that i entered a name and pressed enter while i saved it to desktop to upload it to my schools homework site...so is there anyway to get the code out of this file, or will i have to re write all the lines D: ?
The file you're providing us with is apparently a .dev file, used by Dev-C++. It is used for projects, like Visual C++'s .vcxproj or (sort of) a Makefile used with g++. http://www.file-extensions.org/dev-file-extension-dev-c-project-file
Somehow you saved that .dev file over your source .cpp file. When you overwrite a file, the old version is gone. You'll be well advised to keep backup copies (I copy the entire folder with all its files) in case something strange like this happens again. Sorry you lost your code.
As has been stated in the comments, there is no way to recover the code now that the file has been overwritten/was not saved correctly.
I'm trying to understand source code of SDL-1.2.15, and to find out how it renders stuff on windows. But I can't find where the rendering is happening. I looked inside SDL-1.2.15/src/video folder, and there is a ton of subfolders, and I don't know what any of these stands for. See for yourself.
aalib/ directfb/ ipod/ os2fslib/ quartz/ windib/
ataricommon/ dummy/ maccommon/ photon/ riscos/ windx5/
bwindow/ fbcon/ macdsp/ picogui/ svga/ wscons/
caca/ gapi/ macrom/ ps2gs/ symbian/ x11/
dc/ gem/ nanox/ ps3/ vgl/ xbios/
dga/ ggi/ nds/ qtopia/ wincommon/ Xext/
Is this documented somewhere? This is a pretty popular library, so it probably is documented, right? Right? What's the point of having source code if you can't even understand it, if you can't find functions you are using.
While not all the names are self-explanatory, they contain some hints.
directfb, fbcon (framebuffer console) and X (x11, Xext) are output layers on Linux (unix).
The ones starting with win indicate they are for Windows. More specifically, windib should be about device independent bitmaps (DIBs), dx5 about DirectX 5, and wincommon about some common stuff. Indeed, using grep shows that (only) these folders contain Windows-specific code:
grep -r windows.h src/video/*
[ lists files in the win* folders ]
You could also just compile the package on Windows and see which files were compiled (which folders contain object files)
However, to find out what it actually does, you should rather study the function you're interested in (e.g. SDL_BlitSurface), look at it's implementation, and then look at the implementation of the functions it uses. Start in SDL_video.h (and notice that SDL_BlitSurface is just a define).
You should use some tool to search the code base. Grep or some IDE. Or both.
First of all, why not SDL2?
These are different SDL's video drivers. You can get what driver is used by your program by calling SDL_VideoDriverName. Which driver will be used determined by target platform (e.g. operating system - most drivers are platform-specific), environment variable SDL_VIDEODRIVER, or calling side.
I have reinstalled emacs 24.2.50 on a new linux host and started a new dotEmacs config based on magnars emacs configuration. Since I have used CEDET to some success in my previous workflow I started configuring it. However, there is some strange behaviour whenever I load a C++ source file.
[This Part Is Solved]
As expected, semantic parses all included files (and during the initial setup parses all files specified by the semantic-add-system-include variables), but it prints this an error message that goes like this:
WARNING: semantic-find-file-noselect called for /usr/include/c++/4.7/vector while in set-auto-mode for /usr/include/c++/4.7/vector. You should call the responsible function into 'mode-local-init-hook'.
In the above example the error is printed for the STL vector but a corresponding error message is printed for every file included by the one I'm visiting and any subsequent includes. As a result it takes quite a long time to finish and unfortunately the process is repeated any type I open a new buffer.
[This Problem Is Solved Too]
Furthermore it looks like the parsing doesn't really work as when I place the point above a non-c primitive type (i.e. not int,double,float, etc) instead of printing the type's definition in the modeline an error message like
Idle Service Error semantic-idle-local-symbol-highlight-idle-function: "#<buffer DEPFETResolutionAnalysis.cc> - Wrong type argument: stringp, (((0) \"IndexMap\"))"
Idle Service Error semantic-idle-summary-idle-function: "#<buffer DEPFETResolutionAnalysis.cc> - Wrong type argument: stringp, ((\"fXBetween\" 0 nil nil))"
where DEPFETResolutionAnalysis.cc is the file & buffer I'm currently editing and IndexMap and fXBetween are types defined in files included by the file I'm editing/some file included by the file I'm editing.
I have not tested any further features of CEDET/semantic as the problem is pretty annoying. My cedet config can be found here.
EDIT: With the help of Alex Ott I kinda solved the first problem. It was due to my horrible cedet initialisation. See his first answer for the proper way to configure CEDET!
There still remains the problem with the Idle Service Error (which, when enabling global-semantic-idle-local-symbol-highlight-mode, occurs permanently, not only when checking the definition of the type at point).
And there is the new problem of how to disable the site-wise init file(s).
EDIT2: I have executed semantic-debug-idle-function in a buffer where the problem occurs and it produces a ~700kb [sic!] output. It looks like it is performing some operations on a data container which, by the looks of it, contains information on all the symbols defined in the files parsed. As I have parsed a rather large package (~20Mb source files) this table is rather large. Can semantic handle a database that large or is this impossible and the reason of my problem?
EDIT3: Deleting the content of ~/.semanticdb and reparsing all includes did the trick. I still need to disable the site-wise init files but as this is not related to CEDET I will close this question (the question related to the site-wise init files can be found here).
You need to change your init file so it will perform loading of CEDET only once, not in the hook that will be called for each .h/.hpp/.c/.cpp files. You can change this config as the base, and read more in following article.
The problem that you have is caused because Semantic is trying to analyze header files, and when it tries to open them, then its initialization routines are called again, and again...
The first problem was solved by correctly configuring CEDET which is discribed on Alex Ott's homepage. His answer solves this first problem. The config file specified in his answer is a great start for a nice config; I have used the very same to config CEDET for my needs.
The second problem vanished once I updated CEDET from 1.1 to the bazaar (repository) version, which is explained here and in Alex' article. Additionaly one must delete the content of the directory ~/.semanticdb (which contains the semantic database and was corrupted I guess).
I'd like to thank Alex Ott for his help and sticking with me throughout my journey to the solution :)
I'm getting really strange behavior in one of the DLLs of my C++ app. It works and loads fine until I include a single file using #include in the main file of the DLL. I then get this error message:
Loading components from D:/Targets/bin/MatrixWorkset.dll
Could not load "D:/Targets/bin/MatrixWorkset.dll": Cannot load library MatrixWorkset: Invalid access to memory location.
Now I've searched and searched through the code and google and I can't figure out what is going on. Up till now everything was in a single DLL and I've decided to split it into two smaller ones. The file that causes the problems is part of the other second library (which loads fine).
Any ideas would really be appreciated.
Thanks,
Jaco
The likely cause is a global with class type. The constructor is run from DllMain(), and DllMain() in turn runs before LoadLibrary() returns. There are quite a few restrictions on what you can do until DllMain() has returned.
Is it possible that header includes a #pragma comment(lib,"somelibrary.lib") statement somewhere? If so it's automatically trying to import a library.
To troubleshoot this I'd start by looking at the binary with depends (http://www.dependencywalker.com/), to see if there are any DLL dependencies you don't expect. If you do find something and you are in Visual Studio, you should turn on "Show Progress" AKA /VERBOSE on the linker.
Since you are getting the Invalid Access to memory location, it's possible there's something in the DLLMAIN or some static initializer that is crashing. Can you simplify the MatrixWorkset.dll (assuming you wrote it)?
The error you describe sounds like a run-time error. Is this error displayed automatically by windows or is it one that your program emits?
I say attach a debugger to your application and trace where this error is coming from. Is Windows failing to load a dependency? Is your library somehow failing on load-up?
If you want to rule in/out this header file you're including, try pre-compiling your main source file both with and without this #include and diff the two results.
I'm still not getting it going. Let me answer some of the questions asked:
1) Windows is not failing to load a dependency, I think since Dependency Walker shows everything is ok.
2) I've attached a debugger which basically prints the following when it tries to load MatrixWorkset.dll:
10:04:19.234
stdout:&"warning: Loading components from D:/ScinericSoftware/VisualWorkspace/trunk/Targets/bin/MatrixWorkset.dll\n"
10:04:19.234
stdout:&"\n"
status:Stopped: "signal-received"
status:Stopped.
10:04:19.890
stdout:30*stopped,reason="signal-received",signal-name="SIGSEGV",signal-meaning="Segmentation fault",thread-id="1",frame={addr="0x7c919994",func="towlower",args=[],from="C:\\WINDOWS\\system32\\ntdll.dll"}
input:31info shared
input:32-stack-list-arguments 2 0 0
input:33-stack-list-locals 2
input:34-stack-list-frames
input:35-thread-list-ids
input:36-data-list-register-values x
10:04:19.890
3) MSalters: I'm not sure what you mean with a "global with class type". The file that is giving the problems have been included in a different DLL in which it worked fine and the DLL loaded successfully.
This is the top of the MatrixVariable.h file:
#include "QtSF/Variable.h" // Located in depending DLL (the DLL in which this file always lived.
#include "Matrix.h" // File located in this DLL
#include "QList" // These are all files from the Qt Framework
#include "QModelIndex"
#include "QItemSelection"
#include "QObject"
using namespace Zenautics;
using namespace std;
class MatrixVariable : public Variable
{
Q_OBJECT
Q_PROPERTY(int RowCount READ rowCount WRITE setRowCount)
Q_PROPERTY(int ColumnCount READ columnCount WRITE setColumnCount)
Q_PROPERTY(int UndoPoints READ undoPoints WRITE setUndoPoints)
public:
//! Default constructor.
MatrixVariable(const QString& name, int rows, int cols, double fill_real = 0, double fill_complex = 0, bool isReal = true);
etc. etc. etc.
A possible solution is to put the MatrixVariable file back in the original DLL but that defeats the whole idea of splitting the DLL into smaller parts which is not really a option.
I get that error from GetLastError() when I fail to load a DLL from a command line EXE recently. It used to work, then I added some MFC code to the DLL. Now all bets are off.
I just had this exact same problem. A dll that had been working just fine, suddenly stopped working. I was taking an access violation in the CRT stuff that initializes static objects. Doing a rebuild all did not fix the problem. But when I manually commented out all the statics, the linker complained about a corrupt file. Link again: Worked. Now I can LoadLibrary. Then, one by one, I added the statics back in. Each time, I recompiled and tested a LoadLibrary. Each time it worked fine. Eventually, all my statics were back, and things working normally.
If I had to guess, some intermediate file used by the linker was corrupted (I see the ilk files constantly getting corrupted by link.exe). If you can, maybe wipe out all your files and do a clean build? But I'm guessing you've already figured things out since this is 6 months old ...