Install OpenGL on Linux Ubuntu and Running it

What Will I Learn?

• You will learn Install Application on Linux
• You will learn Runing OpenGL on Linux

Requirements

• Linux Ubuntu
• Notepad++/Notepadqq/Text Editor
• C++ Language

Difficulty

• Basic

Tutorial Contents

Well Hello People, now I wan't to tell you how to install OpenGL on linux ubuntu. But first, you must to know what is OpenGL? OpenGL is a abbreviation from Open Graphic Library, which is one API, that is a library consists of various functions and usually used to draw a 2D or 3D object. Okay guys follow me to install it.

Open your terminal

• sudo apt-get update

This will update your apt database to the most recent available packages.

• sudo apt-get install build-essential

This installs the necessary development tools for building source code.

• sudo apt-get install freeglut3-dev

This installs the development libraries and headers for freeglut.

okay you already to install it now you follow me to running it.

Open your Notepad++/Notepadqq/Text Editor

• Copy this source code

#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>
void userdraw(void);
void drawDot(float x, float y)
{
    glBegin(GL_POINTS);
        glVertex2f(x,y);
    glEnd();
}
void drawLine (float x1, float y1, float x2, float y2)
{
    glBegin(GL_LINES);
        glVertex2f(x1,y1);
        glVertex2f(x2,y2);
        glEnd();
}
void setColor(float red, float green, float blue)
{
    glColor3f(red,green,blue);
}
void userdraw(void)
{
    glPointSize(4);
    setColor(1.,1.,1.);
            drawDot(100,40); //point
            
                drawLine(1,1,100,100);//line
                
                    glBegin(GL_POLYGON); //polygon
                    glVertex2f(210,260);
                    glVertex2f(260,260);
                    glVertex2f(260,210);
                    glEnd();
                    
                        glBegin(GL_LINE_STRIP); //polyline
                        glVertex2f(110,160);
                        glVertex2f(110,110);
                        glVertex2f(160,110);
                        glEnd();
}               
void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    userdraw();
    glFlush();
}
void main(int argc, char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(640,480);
    glutInitWindowPosition(100,150);
    glutCreateWindow("My First Open Graphic Library");
    glClearColor(0.0,0.0,0.0,0.0);
    gluOrtho2D(0.,640.,0.0,480.0);
    glutDisplayFunc(display);
    glutMainLoop();
}

Explanation:

#include <GL/glut.h> // a package from OpenGL.

void userdraw(void); //Here is the place to draw.

void drawDot(float x, float y) //function to draw points based on x and y coordinates. If on therethe data type is float, on glVertex2f(x,y);. if on void drawDot(float x, float y) the data type is intiger like this void drawDot(int x, int y), you must change glVertex2f(x,y); to glVertex2i(x,y);. if on the data type is double you must change glVertex2f(x,y); to glVertex2d(x,y);.

void drawLine (float x1, float y1, float x2, float y2) //function to draw lines on your project.

void setColor(float red, float green, float blue) //color settings for dots or lines .

glPointSize(4); //to settings you dots or lines sizes.

setColor(1.,1.,1.); // to set your color.

drawDot(100,40); //the point will be at the coordinates x 100 and the y coordinates 40.

glClearColor(0.0,0.0,0.0,0.0);//for background color.

• Save that source with name try.c
• Open your terminal and run command for compile your program.
  
  gcc try.c -lGL -lGLU -lglut -lm -o utopian

-lGL -lGLU -lglut -lm to call glut package.
-o for name output your program

• if complie success, now call your output name like this " ./utopian" and you can see your output.
  

okay guys until here i told you how to Install OpenGL on Linux Ubuntu and Running it. see you on the next tutorial.

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Posted on Utopian.io - Rewarding Open Source Contributors

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