#include "SDL.h"
#include "stdio.h"
#include "gl/glew.h"
#include "gl/glut.h"

//DALTON BURTS
//a robot whose head moves back and forth at 90 degree angles. I noticed that the speed is different on different computers. had to lower my speed from .5 to .01

float yLocation = 0.0f; //measure how far the y axis has rotated
bool tooFar = false;	//gauge distance head has moved


void cubey(float size)
{
	glBegin(GL_QUADS);
	//front face of the cube
	glVertex3f(size / 2, size / 2, size / 2);
	glVertex3f(-size / 2, size / 2, size / 2);
	glVertex3f(-size / 2, -size / 2, size / 2);
	glVertex3f(size / 2, -size / 2, size / 2);
	//left face
	glVertex3f(-size / 2, size / 2, size / 2);
	glVertex3f(-size / 2, size / 2, -size / 2);
	glVertex3f(-size / 2, -size / 2, -size / 2);
	glVertex3f(-size / 2, -size / 2, size / 2);
	//backface
	glVertex3f(size / 2, size / 2, -size / 2);
	glVertex3f(-size / 2, size / 2, -size / 2);
	glVertex3f(-size / 2, -size / 2, -size / 2);
	glVertex3f(size / 2, -size / 2, -size / 2);
	//right face
	glVertex3f(size / 2, size / 2, -size / 2);
	glVertex3f(size / 2, size / 2, size / 2);
	glVertex3f(size / 2, -size / 2, size / 2);
	glVertex3f(size / 2, -size / 2, -size / 2);
	//top
	glVertex3f(size / 2, size / 2, size / 2);
	glVertex3f(-size / 2, size / 2, size / 2);
	glVertex3f(-size / 2, size / 2, -size / 2);
	glVertex3f(size / 2, size / 2, -size / 2);
	//bottom
	glVertex3f(size / 2, -size / 2, size / 2);
	glVertex3f(-size / 2, -size / 2, size / 2);
	glVertex3f(-size / 2, -size / 2, -size / 2);
	glVertex3f(size / 2, -size / 2, -size / 2);
	glEnd();
}
void head()
{
	//ROBOT HEAD
	glTranslatef(0, 2, -9);

	if (tooFar == false)                    //if you haven't gone too far
	{
		yLocation += .01;                  //rotate at this speed
		glRotatef(yLocation, 0, 1, 0);     //in a positive y direction
		if (yLocation >= 90)                //if greater than 90 degrees turn around
		{
			tooFar = true;
		}
	}

	if(tooFar == true)
	{
		yLocation -= .01;					//subtracting rewinds the motion as long as the y axis isn't inverted
		glRotatef(yLocation, 0, 1, 0);		//maintain proper y axis rotation
		if (yLocation <= -90)				//if the float yLocation drops below -90 the bool triggers and resets the animation
		{
			tooFar = false;
		}
	}

	glColor3f(0, 0, 0);
	cubey(1.0);                  //head base
	glTranslatef(.25, 0, .5);
	glColor3f(1, 0, 0);
	cubey(.1);                   //eye 1
	glTranslatef(-.5, 0, 0);
	glColor3f(1, 0, 0);
	cubey(.1);                   //eye 2
    //translate works in relation to last location***

}
void torso()
{

	glTranslatef(.25 , -1.5, -.5);
	glColor3f(0, 0, 1);
	cubey(1.5);

	glTranslatef(-1, .6, 0);
	glColor3f(0, 0, 0);
	cubey(.75);
	glTranslatef(1, 0, 0);
	cubey(.75);
	glTranslatef(1, 0, 0);
	cubey(.75);
	glTranslatef(-1, -1, 0);
	cubey(.75);
	glTranslatef(0, -.75, 0);
	cubey(.75);
	//
	glTranslatef(-.5, 0, 0);
	cubey(.75);
	glTranslatef(1, 0, 0);
	cubey(.75);
	glTranslatef(0, -.5, 0);
	cubey(.75);
	glTranslatef(-1, 0, 0);
	cubey(.75);
	glTranslatef(0,-.5,0);
	glColor3f(0, 0, 1);
	cubey(.8);
	glTranslatef(1, 0, 0);
	cubey(.8);


}

void init()
{
	glClearColor(1, 1, 1, 0);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	//glOrtho(0, 400, 400, 1, -1, 1);

	gluPerspective(45, 640 / 480, 1, 500);
	glMatrixMode(GL_MODELVIEW);
	glEnable(GL_DEPTH_TEST);

}

void draw()
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glPushMatrix();     //outer push

	glLoadIdentity();	//load identity matrix obj 1

	glPushMatrix();		//inner push obj 1
	head();
	//glPopMatrix();		//inner pop obj 1


	//glLoadIdentity();  //doesn't change anything

	//body disappears.
	//glPushMatrix();		//inner push obj 2
	torso();
	glPopMatrix();		//inner pop obj 2

	glPopMatrix();      //outer pop

}
int main(int argc, char *argv[])
{
	SDL_Window *mainwindow;
	SDL_GLContext maincontext;
	SDL_Init(SDL_INIT_VIDEO);
	mainwindow = SDL_CreateWindow("Custom Robo",
		SDL_WINDOWPOS_CENTERED,
		SDL_WINDOWPOS_CENTERED,
		400, 400,
		SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN);
	maincontext = SDL_GL_CreateContext(mainwindow);

	bool running = true;
	SDL_Event event;
	init();
	while (running)
	{

		draw();


		while (SDL_PollEvent(&event))
		{
			switch (event.type)
			{
			case SDL_QUIT:
				running = false;
				break;
			case SDL_KEYDOWN:
				switch (event.key.keysym.sym)
				{
				case SDLK_h:

					break;

				case SDLK_q:
					SDL_Quit();
					running = false;
					break;
				}//close key switch
			}//close switch
		}//close inner while
		SDL_GL_SwapWindow(mainwindow);
	}//close outer while
	return 0;
}//close main