2. Graphics Program to display 2D Geometric Primitives (Lines).

Graphics Program to display 2D Geometric Primitives - Lines.

#include <GL/gl.h>

#include <GL/glut.h>

void Draw()

{

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0,1.0,1.0);

glBegin(GL_LINES);

glVertex3f(0.2,0.2,0.0);

glVertex3f(0.8,0.2,0.0);

glVertex3f(0.2,0.5,0.0);

glVertex3f(0.8,0.5,0.0);

glVertex3f(0.2,0.8,0.0);

glVertex3f(0.8,0.8,0.0);

glEnd();

glFlush();

}

void Initialize()

{

glClearColor(0.0,0.0,0.0,0.0);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

glOrtho(0.0,1.0,0.0,1.0,-1.0,1.0);

}

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

glutInitWindowSize(500,500);

glutInitWindowPosition(200,200);

glutCreateWindow("Geometric Primitives");

Initialize();

glutDisplayFunc(Draw);

glutMainLoop();

return 0;

}