/*Rotating Shapes
Created by Samuel
Made possible because of
The Pentabolis Project on Youtube
Please give credit to original creators
for more information go to
sammysawesomesite.neocities.org/polygoncpp
*/

#include <GL/glut.h>
#include <GL/glu.h>
#include <GL/gl.h>
#include <iostream>
using namespace std;

void display();
void reshape(int, int);
void timer(int);
void draw_square(float, float);
void keyboardCallback(unsigned char key, int x, int y);

void init() {
	
	glClearColor(0.0, 0.0, 0.0, 1.0);
    glEnable(GL_DEPTH_TEST);

}

int main(int argc, char** argv)
{ 
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    
    glutInitWindowPosition(600,250);
    glutInitWindowSize(500,500);
    glutCreateWindow("3D polygonal renderer");
    
    glutKeyboardFunc(keyboardCallback);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutKeyboardFunc(keyboardCallback);
    glutTimerFunc(0, timer, 0);
    init();
    
    glutMainLoop();
    
    return 0;
    
}

float direction = 0.0;
float zang = 0.0;
float xang = 0.0;
float yang = 0.0;
char lastKeyPressed = '\0';

void display() {
	
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	
	glTranslatef(xang, yang, zang);
	glRotatef(direction, 0.0, 0.0, 0.0);
	
	//draw
	glBegin(GL_QUADS);
	
	
	//test
	
	
	//front
    glColor3f(1.0,0.0,0.0);
    glVertex3f(-1.0,1.0,1.0);
    glVertex3f(-1.0,-1.0,1.0);
    glVertex3f(1.0,-1.0,1.0);
    glVertex3f(1.0,1.0,1.0);
    //back
    glColor3f(0.5,0.0,0.0);
    glVertex3f(1.0,1.0,-1.0);
    glVertex3f(1.0,-1.0,-1.0);
    glVertex3f(-1.0,-1.0,-1.0);
    glVertex3f(-1.0,1.0,-1.0);
    //right
    glColor3f(0.7,0.0,0.0);
    glVertex3f(1.0,1.0,1.0);
    glVertex3f(1.0,-1.0,1.0);
    glVertex3f(1.0,-1.0,-1.0);
    glVertex3f(1.0,1.0,-1.0);
    //left
    glColor3f(0.7,0.0,0.0);
    glVertex3f(-1.0,1.0,-1.0);
    glVertex3f(-1.0,-1.0,-1.0);
    glVertex3f(-1.0,-1.0,1.0);
    glVertex3f(-1.0,1.0,1.0);
    //top
    glColor3f(0.9,0.0,0.0);
    glVertex3f(-1.0,1.0,-1.0);
    glVertex3f(-1.0,1.0,1.0);
    glVertex3f(1.0,1.0,1.0);
    glVertex3f(1.0,1.0,-1.0);
    //bottom
    glColor3f(0.2,0.0,0.0);
    glVertex3f(-1.0,-1.0,-1.0);
    glVertex3f(-1.0,-1.0,1.0);
    glVertex3f(1.0,-1.0,1.0);
    glVertex3f(1.0,-1.0,-1.0);
	
	glEnd();
	
	glutSwapBuffers();
}

void reshape(int w, int h) {
	
	glViewport(0,0, (GLsizei)w,(GLsizei)h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(60, 1, 2.0, 50.0);
	glMatrixMode(GL_MODELVIEW);
	
}

void timer(int) {
	
	glutPostRedisplay();
	glutTimerFunc(1000/60, timer, 0);
	
}

void keyboardCallback(unsigned char key, int x, int y) {
    
    lastKeyPressed = key;

    switch(key) {
    	case 27:
    		
    		exit(0);
    		
    		break;
    		
		case 'd':

			xang -= 0.5;   
			 
			break;
			
		case 'a':

            xang += 0.5; 
			    
			break;
		
		case 'w':
			
			zang += 0.5;
		    
			break;
			
		case 's':

			zang -= 0.5;

			break;
		
		case 'c':
			
			direction += 1.0;
		     
			break;
			
		case 'x':
			
			direction -= 1.0;
		     
			break;
				
		case ' ':
			
			yang -= 1.0;
		     
			break;
			
		case 'e':
			
			yang += 1.0;
			
			break;
			
		case 'r':
			
			zang = 0.0;
			yang = 0.0;
			xang = 0.0;
			direction = 0.0;
			
			break;
		
	}
}