/********************************************************************
  File:         interface.cc 
  Author:       Dana Vrajitoru
  Project:      A fractal program
  Last updated: January 30, 2017.

  Interface functions for the fractal program.

********************************************************************/

#include "glheader.h"
#include "interface.h"
#include "sierpinski.h"
#include <cstdlib>

int width = 500, height = 500;

/* initial triangle */

Point2 v[]={{-1.0, -0.58}, {1.0, -0.58}, {0.0, 1.15}};

int n;

// Create a window and set up the GUI functions
void createWindowGUI()
{
  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB );
  glutInitWindowSize(width, height);
  glutCreateWindow("2D Gasket");
  glutReshapeFunc(myResize);
  glutDisplayFunc(display);
  //glutIdleFunc(display);
  glutKeyboardFunc(key);
  //glutSpecialFunc(spkey);
  //glutMouseFunc(mouse);
}

// Application parameters
void myinit()
{
    n = 5;
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(-1.25, 1.25, -1.25, 1.25);
    glMatrixMode(GL_MODELVIEW);
    glClearColor (0, 0, 0, 1.0);//black
    glColor3f(1.0,0.0,0.0);     // red
    //glLineWidth(2);
    glPolygonMode( GL_FRONT_AND_BACK, GL_LINE);
}

// To be called whenever the window is resized.
void myResize(int w, int h)
{
    width = w;
    height = h;
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(-1.25, 1.25, -1.25, 1.25);
    glMatrixMode(GL_MODELVIEW);
}

// Callback function for the display
void display(void)
{
  glClear(GL_COLOR_BUFFER_BIT);
  glClearColor (0, 0, 0, 1.0);//black
  glColor3f(1.0,0.0,0.0);     // red
  divide_triangle(v[0], v[1], v[2], n);
  glFlush();
}

// Callback function for an Ascii key being pressed
void key(unsigned char key, int x, int y)
{
  switch (key) {
  case 'q':
  case 'Q':
    exit(0);
  case '1':
    n = 2;
    glutPostRedisplay();
    break;
  }
}

// Callback function for a special key being pressed
void spkey(int key, int x, int y)
{
  switch (key) {
  case GLUT_KEY_LEFT:
    glutPostRedisplay();
    break;
  case GLUT_KEY_RIGHT:
    glutPostRedisplay();
    break;
  }
}