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freestyler
08-24-2002, 01:42 AM
I have just started learning/using OpenGL and when I try to compile this Example code I get this error:
"
[Linker error] undefined reference to `gluLookAt@72'
"

This is my code:




#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>

void init(void)
{
glClearColor (0.0, 0.0, 0.0, 0.0);
glShadeModel (GL_FLAT);
}

void display(void)
{
glClear (GL_COLOR_BUFFER_BIT);
glColor3f (1.0, 1.0, 1.0);
glLoadIdentity (); /* clear the matrix */
/* viewing transformation */
gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
glScalef (1.0, 2.0, 1.0); /* modeling transformation */
glutWireCube (1.0);
glFlush ();
}

void reshape (int w, int h)
{
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glFrustum (-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
glMatrixMode (GL_MODELVIEW);
}

int main(int argc, char** argv)
{
glutInit(&amp;argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize (500, 500);
glutInitWindowPosition (100, 100);
glutCreateWindow (argv[0]);
init ();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();
return 0;
}


Any reason?
Thanks!

Robbo
08-24-2002, 05:03 AM
You need to link with the glu library - if you are using Visual Studio, you can include it in the linker options of the project.

jono_123
08-26-2002, 10:44 PM
or you can just type:
#pragma (lib,"glu.lib")
in your code i think

Deiussum
08-27-2002, 04:11 AM
Originally posted by jono_123:
or you can just type:
#pragma (lib,"glu.lib")
in your code i think

That's a compiler specific pragma. So far as I know it only works with VC++ and Borland's compiler. In any case it should be glu32.lib.