#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <GL/glut.h>
#include <GL/gl.h>

float viewRotY = 0, viewRotX = 0;

void drawEverything(void);
void initLight(void);
void checkGLError(char *);
void key(unsigned char k, int x, int y);
void specialkey(int k, int x, int y);


int main(int argc, char *argv[])
    {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("example");
    glutDisplayFunc(drawEverything);
    glutKeyboardFunc(key);
    glutSpecialFunc(specialkey);
    glutMainLoop();
    return 0;
    }


void drawEverything(void)
    {
    GLfloat red[4] = { 1, 0, 0, 1 };
    GLfloat green[4] = { 0, 1, 0, 1 };
    GLfloat blue[4] = { 0, 0, 1, 1 };
    GLfloat cyan[4] = { 0, 1, 1, 1 };
    GLfloat magenta[4] = { 1, 0, 1, 1 };
    GLfloat yellow[4] = { 1, 1, 0, 1 };
    GLfloat white[4] = { 1, 1, 1, 1 };
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glEnable(GL_DEPTH_TEST);
    
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(50.0, 1.0, 1.0, 100.0);
    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    initLight();
    
    glTranslatef(0.0, 0.0, -30.0);
    glRotatef(viewRotX, 1.0, 0.0, 0.0);
    glRotatef(viewRotY, 0.0, 1.0, 0.0);

	glMaterialfv(GL_FRONT, GL_DIFFUSE, white);
    glPushMatrix();
     glTranslatef(-12.0, 0.0, 0.0);
     glutSolidSphere(1.5, 16, 8);
     glTranslatef(0.0, 4.0, 0.0);
     glutWireSphere(1.5, 16, 8);
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, yellow);
    glPushMatrix();
     glTranslatef(-8.0, 0.0, 0.0);
     glutSolidCube(2.0);
     glTranslatef(0.0, 4.0, 0.0);
     glutWireCube(2.0);
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, cyan);
    glPushMatrix();
     glTranslatef(-4.0, 0.0, 0.0);
     glutSolidCone(1.0, 1.5, 16, 4);
     glTranslatef(0.0, 4.0, 0.0);
     glutWireCone(1.0, 1.5, 16, 4);
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, green);
    glPushMatrix();
     glTranslatef(0.0, 0.0, 0.0);
     glutSolidTorus(0.5, 1.5, 8, 16);
     glTranslatef(0.0, 4.0, 0.0);
     glutWireTorus(0.5, 1.5, 8, 16);
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, magenta);
    glPushMatrix();
     glTranslatef(4.0, 0.0, 0.0);
     glutSolidDodecahedron();
     glTranslatef(0.0, 4.0, 0.0);
     glutWireDodecahedron();
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, red);
    glPushMatrix();
     glTranslatef(8.0, 0.0, 0.0);
     glutSolidOctahedron();
     glTranslatef(0.0, 4.0, 0.0);
     glutWireOctahedron();
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, blue);
    glPushMatrix();
     glTranslatef(12.0, 0.0, 0.0);
     glutSolidTetrahedron();
     glTranslatef(0.0, 4.0, 0.0);
     glutWireTetrahedron();
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, yellow);
    glPushMatrix();
     glTranslatef(-6.0, -4.0, 0.0);
     glutSolidIcosahedron();
     glTranslatef(0.0, -4.0, 0.0);
     glutWireIcosahedron();
    glPopMatrix();    
    
	glMaterialfv(GL_FRONT, GL_DIFFUSE, red);
    glPushMatrix();
     glTranslatef(6.0, -4.0, 0.0);
     glutSolidTeapot(2.0);
     glTranslatef(0.0, -4.0, 0.0);
     glutWireTeapot(2.0);
    glPopMatrix();    
    
    glutSwapBuffers();
    
    checkGLError("end-of-frame");
    }


void initLight(void)
    {
    GLfloat white[4] = { 1, 1, 1, 1 };
    GLfloat lightPos[4] = {-1, 1, 1, 0};
    glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
	glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
    }


void checkGLError(char *prefix)
    {
    GLenum err = glGetError();
    if (err != GL_NO_ERROR)
        printf("%s GL error '%s'\n",prefix,gluErrorString(err));
    }


void key(unsigned char k, int x, int y)
    {
    if (k == 27)
        exit(0);
    }


void specialkey(int k, int x, int y)
    {
    if (k == GLUT_KEY_LEFT)
        viewRotY += 3;
    else if (k == GLUT_KEY_RIGHT)
        viewRotY -= 3;
    else if (k == GLUT_KEY_UP)
        viewRotX += 3;
    else if (k == GLUT_KEY_DOWN)
        viewRotX -= 3;
    glutPostRedisplay();
    }