// Computer Graphics - Amir Hesami
// line_strip.cpp
#include <GL/glut.h>

#pragma comment(lib, "opengl32.lib")  // Link OpenGL32.lib
#pragma comment(lib, "glu32.lib")	  // Link Glu32.lib
#pragma comment(lib, "glut32.lib")    // Link Glut32.lib

void display();

void init( );

int main(int argc, char** argv)
{
	//Initialize glut and specifies command line options
	glutInit(&argc, argv);

	//Initializes opreation's mode and coloring system
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    
	//Specifying the window's size
	glutInitWindowSize(500,500);
    
	//Specifying the window's position
	glutInitWindowPosition(100,100);
    
	//Create the window
	glutCreateWindow("Line Strip");
    
	//Calling the drawing function
	glutDisplayFunc(display);
 
	init();

    //Runing the program
	glutMainLoop();
	return 0;
}

void display(void)
{
	glClear(GL_COLOR_BUFFER_BIT);//clear buffers

	glColor3f(1.0, 0.0, 0.0);
	glBegin(GL_LINE_STRIP);
		glVertex2f(0.25, 0.25);
		glVertex2f(0.75, 0.25);
		glVertex2f(0.75, 0.75);
        glVertex2f(0.25, 0.75);
    glEnd();

	glFlush();
}

void init(void)
{
	glClearColor(1.0, 1.0, 1.0, 1.0);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0.0, 1.0, 0.0, 1.0);
}