Errors while using opengl buffers using visual studio 2010 in windows7

Question

I am writing CUDA C codes and trying to use OpenGL for the visualization of simulation data.

I am using Visual Studio 2010 for development.

I was going through the "CUDA by example" book and tried to reproduce the examples in the book. So in the CUDA OpenGL interoperability section everything did work fine until I began making use of glGenBuffers . Other functions related to buffer objects, like glBindBuffer did not identify during compilation either. I googled a lot about this and there are many suggestions like including "GL/glext.h", which I all tried.

I would also like to mention that all of the headers ( glut.h , glew.h , glxew.h and wglew.h ) and lib files ( glut.lib , glew32.lib , glew32s.lib ) are present in the Visual Studio SDK lib and inc directories. In the VS 2010 Project → properties → linker → input → additional dependencies I added the library files in the following order:

cudart.lib glut32.lib glu32.lib glew32.lib glew32s.lib freeglut.lib opengl32.lib

Here's my program's source core for reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/freeglut.h>
#include <GL/glew.h>
#include <GL/glext.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <cutil.h>
#include <cudagl.h>
#include <cuda_gl_interop.h>

#define DIM 512;

GLuint bufferObj;
cudaGraphicsResource *resource;


    void display (void) 
    { 
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f); 
    glClear(GL_COLOR_BUFFER_BIT); 
    glLoadIdentity(); 
    glFlush(); 
    } 
    void reshape (int width, int height) 
    { 
    glViewport(0, 0, (GLsizei)width, (GLsizei)height); 
    glMatrixMode(GL_PROJECTION); 
    glLoadIdentity(); 
    gluPerspective(60, (GLfloat)width / (GLfloat)height, 1.0, 100.0); 
    glMatrixMode(GL_MODELVIEW); 
    } 


    int main(int argc,char **argv)
    {
    cudaDeviceProp prop;
    int dev;

    memset(&prop,0,sizeof(cudaDeviceProp));
    prop.major = 1;
    prop.minor = 0;

    cudaChooseDevice(&dev,&prop);
    cudaGLSetGLDevice(dev);
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA);
    glutInitWindowSize(512, 512);
    glutInitWindowPosition (100, 100); 
    glutCreateWindow("Bitmap");
    glutDisplayFunc(display); 
    glutReshapeFunc(reshape); 
    glutMainLoop(); 
    glGenBuffers(1,&bufferObj);
    //glBindBuffer()
    }

When compiling, I'm presented with the following errors:

1> C:\ProgramData\NVIDIA Corporation\NVIDIA GPU Computing SDK 4.2\C\common\inc\GL/glut.h(574) : see previous definition of 'GLUT_GAME_MODE_DISPLAY_CHANGED'
1>C:\ProgramData\NVIDIA Corporation\NVIDIA GPU Computing SDK 4.2\C\common\inc\GL/glew.h(84): fatal error C1189: #error : gl.h included before glew.h
1> 
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\BuildCustomizatio ns\CUDA 4.2.targets(361,9): error MSB3721: The command ""C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.2\bin\nvcc.exe" -gencode=arch=compute_10,code=\"sm_10,compute_10\" --use-local-env --cl-version 2008 -ccbin "c:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin" -I"C:\ProgramData\NVIDIA Corporation\NVIDIA GPU Computing SDK 4.2\C\common\inc" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.2\include" -G --keep-dir "Debug" -maxrregcount=0 --machine 32 --compile -g -Xcompiler "/EHsc /nologo /Od /Zi /MDd " -o "Debug\OPENGL_PRAC_1.cu.obj" "C:\Users\umdutta\Desktop\SANKHA_ALL_MATERIALS\PRO GRAMMING_FOLDER\CUDA_OPENGL_C\2_PRACTICE_PROG_FOLD ER_(OPENGL_PRAC)\PROJ_NUM_1_OPENGL\PROJ_NUM_1_OPEN GL\OPENGL_PRAC_1.cu"" exited with code 2.
1>
1>Build FAILED.

Answer 1

It really helps to read the error messages. Your problem is, that you mindlessly include a bunch of headers. First, you need only glew.h , and don't use glext.h . Then it's also important to include the headers in the right order.

This should work:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* GLEW covers everything OpenGL.
   When you use GLEW you do not need any other OpenGL header */
#include <GL/glew.h>

/* GLUT is not part of OpenGL. Either use glut.h or freeglut.h – not both. */
#include <GL/glut.h>

#include <cuda.h>
#include <cuda_runtime.h>
#include <cutil.h>
#include <cuda_gl_interop.h>

BTW: cudagl.h is for the old, deprecated GL interaction API. If you use cuda_gl_interop.h you should not use cudagl.h .