11. Graphics Program to display filled geometric Primitives.

#include <GL/gl.h>

#include <GL/glut.h>

#include <math.h>

void initGL()

{

glClearColor(0.0f,0.0f,0.0f,1.0f);

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT);

glBegin(GL_QUADS);

glColor3f(1.0f,0.0f,0.0f);

glVertex2f(-0.8f,0.1f);

glVertex2f(-0.2f,0.1);

glVertex2f(-0.2f,0.7f);

glVertex2f(-0.8f,0.7f);

glEnd();

glBegin(GL_TRIANGLES);

glColor3f(0.0f,0.0f,1.0f);

glVertex2f(0.1f,-0.6f);

glVertex2f(0.7f,-0.6f);

glVertex2f(0.4f,-0.1f);

glEnd();

glBegin(GL_POLYGON);

glColor3f(1.0f,1.0f,0.0f);

glVertex2f(0.4f,0.2f);

glVertex2f(0.6f,0.2f);

glVertex2f(0.7f,0.4f);

glVertex2f(0.6f,0.6f);

glVertex2f(0.4f,0.6f);

glVertex2f(0.3f,0.4f);

glEnd();

glFlush();

}

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutCreateWindow("Vertex, Primitive & Color");

glutInitWindowSize(320,320);

glutInitWindowPosition(50,50);

glutDisplayFunc(display);

initGL();

glutMainLoop();

return 0;

}