Computer-Graphics-Lab/lab4.cpp at main · pg2511/Computer-Graphics-Lab · GitHub

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#include<GL/glut.h>
#include<stdio.h>
#include<stdlib.h>
float ver[8][3]={{0,0,0},{1,0,0},{1,1,0},{0,1,0},{0,0,1},{1,0,1},{1,1,1},{0,1,1}};
float v1[3]={0,0,5};
void polygon(int a,int b,int c,int d);
void polygon1();
void display()
{
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	gluLookAt(v1[0],v1[1],v1[2],0,0,0,0,1,0);
	polygon1();
	glFlush();
}
void polygon1()
{
	polygon(0,1,2,3);
	polygon(4,5,6,7);
	polygon(5,1,2,6);
	polygon(4,0,3,7);
	polygon(4,5,1,0);
	polygon(7,6,2,3);
}
void polygon(int a,int b,int c,int d)
{
	glBegin(GL_POLYGON);
	glColor3fv(ver[a]);
	glVertex3fv(ver[a]);
	glColor3fv(ver[b]);
	glVertex3fv(ver[b]);
	glColor3fv(ver[c]);
	glVertex3fv(ver[c]);
	glColor3fv(ver[d]);
	glVertex3fv(ver[d]);
	glEnd();
}
void key(char f,int x,int y)
{
	if(f=='x')v1[0]-=.10;
	if(f=='X')v1[0]+=.10;
	if(f=='y')v1[1]-=.10;
	if(f=='Y')v1[1]+=.10;
	if(f=='z')v1[2]-=.10;
	if(f=='Z')v1[2]+=.10;
	display();
}
void Reshape(int w,int h)
{
	glViewport(0,0,w,h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	if(w<=h)
		glFrustum(-2.0,2.0,-2.0*h/w,0*h/w,2.0,20);
	else
		glFrustum(-2.0*w/h,2.0*w/h,-2.0,2.0,2.0,20);
	glMatrixMode(GL_MODELVIEW);
}

int main(int argc,char ** argv)
{
	glutInit(&argc,argv);
	glutInitDisplayMode(GLUT_SINGLE|GLUT_DEPTH);
	glutInitWindowSize(500,500);
	glutInitWindowPosition(10,10);
	glutCreateWindow("Spinning Color Cube : C Tathva");
	glutDisplayFunc(display);
	glutKeyboardFunc((void (*)(unsigned char, int, int))key);
	glEnable(GL_DEPTH_TEST);
	glutReshapeFunc(Reshape);
	glutMainLoop();
	return 0;
}