/*
 * GLUT Shapes Demo
 *
 * Written by Nigel Stewart November 2003
 *
 * This program is test harness for the sphere, cone
 * and torus shapes in GLUT.
 *
 * Spinning wireframe and smooth shaded shapes are
 * displayed until the ESC or q key is pressed.  The
 * number of geometry stacks and slices can be adjusted
 * using the + and - keys.
 */

#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif // __APPLE__

#include <stdlib.h>
#include <stdio.h>
float counter = 0;

void initGL()  //Setbackgroundcolortoblackandopaque
{
    glClearColor(0.0f,0.0f,0.0f,1.0f); //Setbackgrounddepthtofarthest
    glClearDepth(1.0f);
    glEnable(GL_DEPTH_TEST);//Enabledepthtestingforz-culling
    glDepthFunc(GL_LEQUAL);//Setthetypeofdepth-test
    glShadeModel(GL_SMOOTH);//Enablesmoothshading //Niceperspectivecorrections
    glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);
}


void reshape(int width,int height)
{
    glViewport(0,0,width,height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(120.0,(GLfloat)height/(GLfloat)width,1.0,128.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0,1.0,3.0,0.0,0.0,0.0,0.0,1.0,0.0);
}

void keyboard(unsigned char key,int x,int y)
{
    switch(key)
    {
    case'h':
        printf("help\n\n");
        printf("c-Toggleculling\n");
        printf("q/escape-Quit\n\n");
        break;
    case'c':
            if(glIsEnabled(GL_CULL_FACE))
                glDisable(GL_CULL_FACE);
            else
                glEnable(GL_CULL_FACE);
        break;
    case(1):
        glRotatef(1.0,1.,0.,0.);
        break;
    case'2':
            glRotatef(1.0,0.,1.,0.);
        break;
    case'q':
    case 27:
        exit(0);
        break;
    }
    glutPostRedisplay();
}




void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glTranslatef(0.3f,0.0f,-9.0f);
    glRotatef(counter,0.0,1.0,0.0);
    counter+=0.01;
    glBegin(GL_TRIANGLES);

    glColor3f(0.0f,0.5f,1.0f);
    glVertex3f(0.0f,1.0f,0.0f);
    glColor3f(1.0f,0.5f,0.0f);
    glVertex3f(-1.0f,-1.0f,1.0f);
    glColor3f(0.0f,0.5f,1.0f);
    glVertex3f(1.0f,-1.0f,1.0f);

    glColor3f(0.75f,0.68f,1.0f);
    glVertex3f(0.0f,1.0f,0.0f);
    glColor3f(0.4f,1.0f,0.79f);
    glVertex3f(1.0f,-1.0f,1.0f);
    glColor3f(0.0f,1.0f,0.0f);
    glVertex3f(1.0f,-1.0f,-1.0f);

    glColor3f(1.0f,0.0f,0.0f);
    glVertex3f(0.0f,1.0f,0.0f);
    glColor3f(0.0f,1.0f,0.0f);
    glVertex3f(1.0f,-1.0f,-1.0f);
    glColor3f(0.0f,0.0f,1.0f);
    glVertex3f(-1.0f,-1.0f,-1.0f);

    glColor3f(-1.0f,0.0f,1.0f); //Red
    glVertex3f(0.0f,1.0f,0.0f);
    glColor3f(0.3f,0.25f,1.0f); //Blue
    glVertex3f(-1.0f,-1.0f,-1.0f);
    glColor3f(0.1f,1.0f,0.55f); //Green
    glVertex3f(-1.0f,-1.0f,1.0f);

    glEnd();

    glutSwapBuffers();
}

int main(int argc,char**argv)
{





    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_RGB|GLUT_DEPTH|GLUT_DOUBLE);
    glutInitWindowSize(512,512);
    glutInitWindowPosition(20,20);
    glutCreateWindow("Torus");
    glutDisplayFunc(display);
    glutIdleFunc(display);
    glutReshapeFunc(reshape);
    glutKeyboardFunc(keyboard);
    initGL();
    glutMainLoop();
    return 0;
}