#include

void initRendering(){ glEnable(GL_DEPTH_TEST);}

void reshaped(int w,int h){ glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45,(double)w/(double)h,1,200);}

void keyPressed(int k,int x,int y){ if(k==GLUT_KEY_LEFT) { }}

float x=0.0,y=0.0,x1=5.0;

void update(){ x+=0.01; x1-=0.02; if(x>6) { x=-6; x1=4; }}

void display(){ glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glPushMatrix(); glTranslatef(x1,y,-5.0); glBegin(GL_POLYGON); glColor3f(1.0,0.0,0.5); glVertex3f(-1.0,1.0,-5.0); glVertex3f(0.0,2.0,-5.0); glVertex3f(-2.0,2.0,-5.0); glVertex3f(1.0,1.0,-5.0); glEnd(); glPopMatrix();

glPushMatrix();

glTranslatef(x,y,-5.0);

glBegin(GL_POLYGON); glColor3f(0.0,0.5,0.5); glVertex3f(1.0,0.7,-5.0);

glVertex3f(1.5,1.0,-5.0);

glVertex3f(0.7,1.5,-5.0);

glVertex3f(0.0,2.0,-5.0);

glVertex3f(-0.7,1.5,-5.0);

glVertex3f(-1.4,1.6,-5.0);

glVertex3f(-1.7,1.0,-5.0);

glVertex3f(-1.5,0.7,-5.0);

glVertex3f(-1.0,0.5,-5.0); glEnd();

glPopMatrix();

glBegin(GL_POLYGON); glColor3f(1.0,1.0,1.5); glVertex3f(-2.0,-2.0,-5.0); glVertex3f(-1.0,-1.5,-5.0); //glVertex3f(0.0,0.0,-5.0); glVertex3f(2.0,-2.0,-5.0); glVertex3f(1.2,-1.5,-5.0); glEnd();

update(); glutSwapBuffers();}

int main(int argc,char **argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH); glutInitWindowSize(400,400); glutCreateWindow("Simple Cloud"); initRendering(); glutDisplayFunc(display); glutIdleFunc(display); glutReshapeFunc(reshaped); glutSpecialFunc(keyPressed); glutMainLoop();

return(0);}