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OpenGL on Ubuntu

Kyon (912)
I tried to install OpenGL header files on my compiler (which is g++) today, which not worked out as hoped. Every single package I download require me to use hacky tricks to move, change or append files. All have failed so far. What I'm looking for is a package that I can just dump into a certain folder so that he'll eat my code. (*eat it*) If anyone knows of any such package please tell me.

Do note that I have no idea what header files I need and have no knowledge of OpenGL, since I haven't had the ability to start it.

Thanks in advance,


Kyon
Bazzy (6281)
IIRC To have OpenGL on Ubuntu you need these packages: freeglut3-dev, libgl1-mesa-dev, libglu1-mesa-dev and libxxf86vm-dev
They'll install the needed libraries in your system directories
Kyon (912)
Okay, I installed the packages, yet it refuses to compile my code: 
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#include <stdlib.h>
#include <GL/glut.h>


	GLfloat vertices[][3] = {{-1.0,-1.0,-1.0},{1.0,-1.0,-1.0},
	{1.0,1.0,-1.0}, {-1.0,1.0,-1.0}, {-1.0,-1.0,1.0}, 
	{1.0,-1.0,1.0}, {1.0,1.0,1.0}, {-1.0,1.0,1.0}};

	GLfloat normals[][3] = {{-1.0,-1.0,-1.0},{1.0,-1.0,-1.0},
	{1.0,1.0,-1.0}, {-1.0,1.0,-1.0}, {-1.0,-1.0,1.0}, 
	{1.0,-1.0,1.0}, {1.0,1.0,1.0}, {-1.0,1.0,1.0}};

	GLfloat colors[][3] = {{0.0,0.0,0.0},{1.0,0.0,0.0},
	{1.0,1.0,0.0}, {0.0,1.0,0.0}, {0.0,0.0,1.0}, 
	{1.0,0.0,1.0}, {1.0,1.0,1.0}, {0.0,1.0,1.0}};

void polygon(int a, int b, int c , int d)
{
 	glBegin(GL_POLYGON);
		glColor3fv(colors[a]);
		glNormal3fv(normals[a]);
		glVertex3fv(vertices[a]);
		glColor3fv(colors[b]);
		glNormal3fv(normals[b]);
		glVertex3fv(vertices[b]);
		glColor3fv(colors[c]);
		glNormal3fv(normals[c]);
		glVertex3fv(vertices[c]);
		glColor3fv(colors[d]);
		glNormal3fv(normals[d]);
		glVertex3fv(vertices[d]);
	glEnd();
	}

void colorcube(void)
{
	polygon(0,3,2,1);
	polygon(2,3,7,6);
	polygon(0,4,7,3);
	polygon(1,2,6,5);
	polygon(4,5,6,7);
	polygon(0,1,5,4);
}

static GLfloat theta[] = {0.0,0.0,0.0};
static GLint axis = 2;

void display(void)
{
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	glRotatef(theta[0], 1.0, 0.0, 0.0);
	glRotatef(theta[1], 0.0, 1.0, 0.0);
	glRotatef(theta[2], 0.0, 0.0, 1.0);

 colorcube();

 glFlush();
	glutSwapBuffers();
}

void spinCube()
{
	theta[axis] += 2.0;
	if( theta[axis] > 360.0 ) theta[axis] -= 360.0;
	display();
}

void mouse(int btn, int state, int x, int y)
{
	if(btn==GLUT_LEFT_BUTTON && state == GLUT_DOWN) axis = 0;
	if(btn==GLUT_MIDDLE_BUTTON && state == GLUT_DOWN) axis = 1;
	if(btn==GLUT_RIGHT_BUTTON && state == GLUT_DOWN) axis = 2;
}

void myReshape(int w, int h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h)
        glOrtho(-2.0, 2.0, -2.0 * (GLfloat) h / (GLfloat) w,
            2.0 * (GLfloat) h / (GLfloat) w, -10.0, 10.0);
    else
        glOrtho(-2.0 * (GLfloat) w / (GLfloat) h,
            2.0 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, -10.0, 10.0);
    glMatrixMode(GL_MODELVIEW);
}

int
main(int argc, char **argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize(500, 500);
    glutCreateWindow("colorcube");
    glutReshapeFunc(myReshape);
    glutDisplayFunc(display);
	   glutIdleFunc(spinCube);
	   glutMouseFunc(mouse);
	   glEnable(GL_DEPTH_TEST);
    glutMainLoop();
    return 0;
}
Which compiled perfectly under windows. (sidenote: this is not my code, I copied it just to test OGL)
Bazzy (6281)
Are you linking it properly?
It works for me using this command: 
$ gcc file.c -lGLU -lGL -lglut -lXxf86vm

EDIT:
It works even linking with glut only: $ gcc file.c -lglut
Last edited on
Athar (4466)
For me, it also compiles without any problems on Ubuntu 9.10. Linking glut is enough.
Kyon (912)
I'm using netbeans IDE at the moment, how do I specify this link command?
Last edited on
Bazzy (6281)
Depends on the IDE...
Look for some setting which has the word 'linker' in it
Athar (4466)
In NetBeans, go to Run/Set Project Configuration/Customize/Build/Linker/Libraries, click on "Add Library" and type glut.
Kyon (912)
It finally worked, thanks to both you. :D
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