Program:
#include<GL/glut.h>
void MyInit()
{
glClearColor(1,1,1,1); // Seting Background Color White with full trasparent
glColor3f(1,0,0); // Changing Drawing Color to Red
}
void draw()
{
glClear(GL_COLOR_BUFFER_BIT); //To Clear the frame buffer
glOrtho(0,500,500,0,0,1); // Produces an Oblique Projection
// glOrtho(left,windowwidth,windowheight,top,near,far)
glPointSize(5); // to set the point size
glBegin(GL_LINES); // To group the points
glVertex2f(50,50); // To draw x and y Points
glVertex2f(450,450);
glEnd();
glFlush(); // To Put Changed Pixel in Frame Buffer
}
int main(int argc,char **argv) // argc -> argument counter
{ // argv -> argument vector
glutInit(&argc,argv); // Initialization
glutInitWindowSize(500,500); // Specifying Windows Size
glutInitWindowPosition(100,50); // Chaning Window Position
glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE); // Work in RGB color mode and Single Index Color
glutCreateWindow("Basic Program"); // Create a Window to Diplay Graphics
MyInit();
glutDisplayFunc(draw); // To display an object calling a function
glutMainLoop(); // To Make Our Window Active Continously
return 0;
}
Output:
To Run the Program: $ g++ main.c -lglut -lGL -lGLEW -lGLU -o OpenGLExample
