Glgenbuffers Access Violation Error
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0xc0000005 Access Violation Executing Location 0x00000000
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Glewinit Failed
Forum Rules and Guidelines. You must register before you can post. Page 1 of 2 12 Last Jump to page: Results 1 to 10 of 12 Thread: [C++] Memory violation with glGenBuffers Thread Tools Show Printable Version Email this Page… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 08-19-2013,03:23 PM #1 elfeck View Profile View Forum Posts Private Message Junior Member Newbie Join Date
Glewinit Returns 1
Jun 2013 Posts 20 [C++] Memory violation with glGenBuffers Hello, I'm using OpenGL with C++ through glew and freeglut. I also do successfully load the necessary OpenGL-extentions. I get an memory violation error Code : Unhandled exception at 0x74DBC9F5 in MyProgram.exe: 0xC0000005: Access violation executing location 0x00000000. when trying to call this: Code : glGenBuffers(1, &vboHandle); VboHandle is a GLuint member of my Vao-class. I think the problem is that it's a GLuint and not a GLuint* but why? Thanks! Last edited by elfeck; 08-19-2013 at 03:43 PM. 08-19-2013,03:47 PM #2 carsten neumann View Profile View Forum Posts Private Message Advanced Member Frequent Contributor Join Date Apr 2010 Posts 900 To me this sounds more like GLEW is not correctly initialized and therefore glGenBuffers is not a valid function pointer, did you read this wiki page, in particular the part about using glewExperimental? Are you initializing GLEW after creating an OpenGL context? - it needs one to obtain the function pointers. 08-19-2013,04:14 PM #3 elfeck View Profile View Forum Posts Private Message Junior Member Newbie Join Date Jun 2013 Posts 20 glewInit() ist returning GLEW_OK ... so I think that's not the problem. EDIT: I think I f
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error) (Read 2380 times) 0 Members and 1 Guest are viewing this topic. mike38 Newbie Posts: 14 GLEW Problems (access violation error) « on: August 15, 2013, 10:48:32 am » Hi all,I recently ran into some trouble trying http://en.sfml-dev.org/forums/index.php?topic=12651.0 to get GLEW working in SFML. Currently the SFML libraries are static, and the GLEW http://www.dreamincode.net/forums/topic/322124-opengl-access-violation/ library is dynamically linked- with a DLL in beside the .exe, is this correct?The problem is that when I try and use any of the GL extensions I get an access violation error:int main(){ sf::RenderWindow window(sf::VideoMode(800, 600), "Test", sf::Style::Default, sf::ContextSettings(32)); glewExperimental = GL_TRUE; GLenum glewErr = glewInit(); if (glewErr != GLEW_OK) access violation std::cout << "GLEW not OK..."; else std::cout << "GLEW is OK..."; if (!GLEW_ARB_vertex_buffer_object) { std::cout << "Not supported..."; } unsigned int temp = 0; glGenBuffers(1,&temp); // Access violation reading '0x000...'Visual C++ throws an access violation error at the glGenBuffers line.Most similar problems I see online are because of omitting 'glewInit()', or 'glewExperimental glgenbuffers access violation = GL_TRUE'.Is it possibly a problem with the way I have set up GLEW? (glewInit returns GLEW_OK, and by using glGetString(GL_EXTENSIONS) [or something] I am sure that my drivers support VBOs, they are part of the standard anyway aren't they?)Any help would be much appreciated, thanks. « Last Edit: August 15, 2013, 10:50:28 am by mike38 » Logged Michael's Software Sitewww.sites.google.com/site/michaelssoftwaresite/ eXpl0it3r SFML Team Hero Member Posts: 7163 Re: GLEW Problems (access violation error) « Reply #1 on: August 15, 2013, 11:06:27 am » SFML uses GLEW as well, so if you want to use your own GLEW stuff, you'll have to call glewInit() before SFML gets the chance to, at least that's what I've once done.Not sure if that will work with the linking, because SFML include GLEW in its own libraries and will link it statically, which IIRC will define GLEW_STATIC. Maybe try to switch to linking GLEW static as well? Logged Official FAQ: http://www.sfml-dev.org/faq.phpNightly Builds: http://www.nightlybuilds.ch/覧覧覧覧覧覧覧覧覧覧覧Dev Blog: http://dev.my-gate.net/Thor: http://www.bromeon.ch/libraries/thor/ mike38 Newbie Posts: 14 Re: GLEW Problems (access violation error) « Reply #2 on: August 15, 2013, 11:57:27 am » Okay, thanks for the reply .I reverted back to the static glew32s.lib library, and I moved glewInit() to the very top of main(). However, VC++2010 complains that:1>sfml-graphics-s-d.lib(glew.obj) : error LNK2005: ___glewCopyTexSubImage3D already defi
5 Replies - 3382 Views - Last Post: 26 March 2016 - 07:11 AM Rate Topic: #1 Troncoso New D.I.C Head Reputation: 0 Posts: 4 Joined: 30-May 13 openGL Access Violation Posted 30 May 2013 - 05:57 PM I'm following this tutorial and I get an error when trying to run the code. I even downloaded his source and copy/pasted it to be sure I'm not typing it wrong. Here's the code, so you don't have to go to the link: #include