Messages

1

DotNet / Re: Text with disappearing characters with the dotNet binding

« on: March 02, 2013, 06:02:25 pm »

I tried to do it with OpenTK - it wanted me to have a context though, but OpenTK.Graphics.GraphicsContext.CurrentContext was always null, creating a context proved futile (probably because the SFML window already has a context) and creating a dummy context (via GraphicsContext.CreateDummyContext()) was pretty useless as one can't call MakeCurrent() on that one.

I figured that might be similar with other OpenGL wrappers, so I tried the P/Invoke. Works fine, thanks!

Just for reference for people searching for this, you simply need this piece of code:

Code: [Select]

[DllImport("opengl32.dll")]
private static extern void glFlush();
...and now you can call glFlush() in that class.

Thanks for your help, Laurent!

2

DotNet / Re: Text with disappearing characters with the dotNet binding

« on: March 02, 2013, 04:45:29 pm »

Well, where do I find it? Another thread I found tells me to include <SFML/OpenGL.hpp> - how do I do that for C#? Or what do I have to do there to access the function?

Apologies if that question is really elementary, I have some experience in C# and C++, but virtually none in using one from the other (as seems is needed here).

3

DotNet / Text with disappearing characters with the dotNet binding

« on: March 02, 2013, 04:48:15 am »

Hello!

I have the problem described in sf::Text disappearing characters [SFML 2.0].

The workaround solution mentioned over there is to call glFlush(). Is that possible from the dotNet binding? If not, how can I work around the problem here?

Cheers,
Tobias

4

Window / Re: GetFrameTime doesn't exist anymore?

« on: July 07, 2012, 01:58:25 pm »

Oh, I didn't know there's a seperate .Net repository. Where on the homepage can I find that link?

Anyway, thanks! I've looked up what the System library implements and indeed everything in there I can do with .Net alone. Thanks for your help guys!

5

Window / Re: GetFrameTime doesn't exist anymore?

« on: July 07, 2012, 01:08:49 pm »

Okay, I'm stumped. Where can I find the example source code for the .NET RC?
It's not in the download on the download page, and I cannot find them in the repository either.

(Furthermore, though that might not be relevant: The .chm docs for the C++ version include "Time" as an index, while the .NET version doesn't.)

6

Window / Re: GetFrameTime doesn't exist anymore?

« on: July 07, 2012, 12:01:23 am »

The linked topic points to the "Clock" class which doesn't seem to be present in the SFML .Net version 2.0 RC. (Nor is "Time" which is mentioned in the tutorials.)

7

DotNet / SFML 2.0: AccessViolationException in Text.DisplayedString

« on: February 15, 2012, 05:36:08 pm »

Hello,

it seems that at random times DisplayedString cannot be read and prompts me with an AccessViolationException.

I've compiled a minimal example reproducing the problem - at least on my computer.

Code: [Select]

using System;
using SFML.Window;
using SFML.Graphics;

namespace Experiments.Executables {
    class TextTest {
        private RenderWindow app;

        public TextTest() {
            // Create the main window
            app = new RenderWindow(new VideoMode(800, 600), "SFML window");
            app.Closed += new EventHandler(OnClose);
        }

        public void Run() {
            // Start the game loop
            while (app.IsOpened()) {
                // Process events
                app.DispatchEvents();

                // Clear screen
                app.Clear();

                for (int i = 0; i < 100000; i++) {
                    new Text("Test").DisplayedString = "test";

                    /*
                     * System.AccessViolationException was unhandled
                          Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
                          Source=mscorlib
                          StackTrace:
                               at Microsoft.Win32.Win32Native.CoTaskMemFree(IntPtr ptr)
                               at SFML.Graphics.Text.sfText_GetString(IntPtr This)
                               at SFML.Graphics.Text.get_DisplayedString() in d:\dev\libs\C++\SFML-2.0\bindings\dotnet\src\Graphics\Text.cs:line 206
                               at Experiments.Executables.TextTest.Run() in D:\dev\Projekte\C#\Spiele\KinectTetris\Experiments\Executables\TextTest.cs:line 29
                               at Experiments.Executables.TextTest.Main(String[] args) in D:\dev\Projekte\C#\Spiele\KinectTetris\Experiments\Executables\TextTest.cs:line 44
                               at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
                               at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
                               at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
                               at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
                               at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
                               at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
                               at System.Threading.ThreadHelper.ThreadStart()
                          InnerException:
                     */
                    string str = new Text("Test").DisplayedString;
                }

                // Update the window
                app.Display();
            }
        }

        static void OnClose(object sender, EventArgs e) {
            // Close the window when OnClose event is received
            RenderWindow window = (RenderWindow)sender;
            window.Close();
        }

        static void Main(string[] args) {
            (new TextTest()).Run();
        }
    }
}

The high number for the for loop just accounts for the seemingly random nature of the error - I've had it with much lower amounts of calls in my code. In the above code, sometimes it crashes right at the start, sometimes I have to wait for up to a minute.

I am using the version of SFML 2.0 that was current a few days ago. Windows 7 x64, compiling for x86 in Debug Mode with .NET Framework 4.0 in Visual Studio 2010.

Cheers,
TobiasW

8

Graphics / Any known crash causers on SFML2?

« on: August 19, 2010, 03:56:16 am »

I have the same problem with the current version, and a little more information:

The segfault described above is thrown for me in WglContext.cpp:93: wglMakeCurrent(NULL, NULL);

I don't know if that is of any help: Since I really have no idea about OpenGL, I tried removing said line and compile SFML2 again. The error just wanders to the next line: wglDeleteContext(myContext);

Removing the

Code: [Select]

if (wglGetCurrentContext() == myContext)
     wglMakeCurrent(NULL, NULL);
wglDeleteContext(myContext);
removes the error. (What happens if I don't delete the context? May I work this way till a fix is figured out?)


OS: Win 7 64bit
Graphics Card:    ATI Mobility Radeon HD 5650


Oh, and also no idea if that is of any help, while I googled a little I found this:
https://svn.lcube.de/dev123/projects/cafu/trunk/Libs/OpenGL/OpenGLWindow.cpp
Especially one comment strikes me as interesting:

Code: [Select]

// WARNING: Omitting the following line worked when this library was a static library.
// When it became a shared library, the next call to glXMakeCurrent() caused a segmentation fault without this line.
// That's strange. Probably it's just a driver bug on my machine, but I thought I'd better mention it...
glXDestroyContext(DisplayPtr, RC);


edit:
Curious and curiouser: When I use static linking, everything works fine.

9

Graphics / Shape with a hole

« on: April 11, 2010, 06:00:32 am »

Thanks for the fast answer!

Hmm... but when I fill the outer circle with a color, won't the inner circle be filled too? Drawing just the outlines is no problem as you can see in the screenshot.


edit: I just realised that what I want to draw is a circle with a bigger outline. Maybe that's what you meant, too?

But just out of curiousity: Would it be possible to draw (or better "to not draw") shapes with holes? For example, a rectangle with a circle-shaped hole?

10

Graphics / Shape with a hole

« on: April 11, 2010, 05:43:16 am »

Hello everyone,

I want to draw a circle with a circle-shaped hole - and I want to fill only the grey marked area:



Any idea how I could do this?

Thanks in advance,
Tobias