#include <GL/glut.h>
#include <math.h>
#include <stdio.h>

// Define a constant for the value of PI
#define GL_PI 3.1415f


static float orbitDegreeZ = 0.0f;
static float orbitDegreeX = 0.0f;
static float zoom = 1.0f;

GLint i = 0;

int erdo[10][3]={{-10,-10,1},{40,-30,2},{30,20,1},{20,10,2},{45,25,2},{45,52,1},{0,0,2},{-10,20,1},{30,0,1},{20,-10,1}};

void drawPine(int x, int y) {
	glPushMatrix();
	glTranslatef((float)x,(float)y,0.0);
	
	glColor3f(0.6f,0.4f,0.2f);
	//glutSolidCone(5.0,5.0,60,10);
	gluCylinder(gluNewQuadric(), 2.0,2.0,10,60,10);
	
	glColor3f(0.0f,0.6f,0.0f);
	
	glTranslatef(0.0,0.0,10.0);
	glutSolidCone(10.0,20.0,10,10);
	
	glTranslatef(0.0,0.0,10.0);
	glutSolidCone(7.0,15.0,10,10);
	
	glTranslatef(0.0,0.0,10.0);
	glutSolidCone(4.0,15.0,10,10);
	
	glPopMatrix();
}


void drawNormalTree(int x, int y) {
	glPushMatrix();
	glTranslatef((float)x,(float)y,0.0);
	
	glColor3f(0.6f,0.4f,0.2f);
	//glutSolidCone(5.0,5.0,60,10);
	gluCylinder(gluNewQuadric(), 2.0,2.0,30,60,10);
	
	glTranslatef(0.0,0.0,30.0);
	
	glColor3f(0.0f,0.8f,0.0f);
	glutSolidSphere(10.0,40,40);
	//glutSolidCone(10.0,20.0,10,10);
	
	glPopMatrix();
}


void drawTree(int x, int y, int which) {
	//drawPine(x,y);
	if( which == 1) drawNormalTree(x,y);
	if( which == 2) drawPine(x,y);
	
}


// Called to draw scene
void RenderScene(void)
{
  int j = 0;
  
  // Clear the window with current clearing color
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  
  
    glPushMatrix();
	glRotatef(-50.0 + orbitDegreeX, 1.0f, 0.0f, 0.0f);
	glRotatef(orbitDegreeZ, 0.0f,0.0f,1.0f);
	
  
  
  for (j = 0; j < 10; j++) {
	drawTree(erdo[j][0],erdo[j][1], erdo[j][2]);
  }
  
  glPopMatrix();
  
  // Flush drawing commands
  glutSwapBuffers();
}

// This function does any needed initialization on the rendering
// context. 
void SetupRC()
{
  // Black background
  glClearColor(0.0f, 0.0f, 0.0f, 1.0f );
  glEnable(GL_DEPTH_TEST);
  
 
}



void Timer(int value)
{
  printf("Timer esemeny (%d)\n", value);
  i++;
  if( i==10 ) i= 0;
  glutPostRedisplay();
  glutTimerFunc(1000, Timer, value + 1);
}

void Idle()
{

  glutPostRedisplay();
}

void ChangeSizeOrtho(int w, int h)
{
  //GLfloat nRange = 25.0f;
  //GLfloat nRange = 30.0f;
  GLfloat nRange = 80.0f ;
  
  // Prevent a divide by zero
  if(h == 0)
    h = 1;
  
  // Set Viewport to window dimensions
  glViewport(0, 0, w, h);
  
  // Reset projection matrix stack
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  
  // Establish clipping volume (left, right, bottom, top, near, far)
  if (w <= h) 
    glOrtho (-nRange, nRange, -nRange*h/w, nRange*h/w, -nRange, nRange);
  else 
    glOrtho (-nRange*w/h, nRange*w/h, -nRange, nRange, -nRange, nRange);
  
  // Reset Model view matrix stack
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
}



void SpecialKeys(int key, int x, int y) {
	
	
	   
		if (key == GLUT_KEY_UP   ) {
			orbitDegreeX += 1.0f;
		}
		if (key == GLUT_KEY_DOWN ) {
			orbitDegreeX -= 1.0f;
		}
		
		
		if (key == GLUT_KEY_LEFT ) {
			orbitDegreeZ -= 1.0f;
		}
		if (key == GLUT_KEY_RIGHT) {
			orbitDegreeZ += 1.0f;
		}
		
		
		if ( orbitDegreeX > 80.0f ) orbitDegreeX = 80.0f;
		if ( orbitDegreeX < -50.0f ) orbitDegreeX = -50.0f;
		
		if (orbitDegreeZ <= 360.0f) orbitDegreeZ -= 360.0f;
		if (orbitDegreeZ < 0.0f) orbitDegreeZ = 360.0f - orbitDegreeZ;
	
		glutPostRedisplay();

}


int main(int argc, char* argv[])
{
  // >> Inicializalas

 

  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
  glutInitWindowSize(300, 300);
  glutCreateWindow("GLUT Alap");



  // << Inicializalas

  // >> Callback fuggvenyek

  glutReshapeFunc(ChangeSizeOrtho); // Parhuzamos vetites
  //glutReshapeFunc(ChangeSizePerspective); // Perspektiv vetites

  glutSpecialFunc(SpecialKeys);
  //glutKeyboardFunc(Keyboard);
  //glutKeyboardFunc(Keyboard);
  glutDisplayFunc(RenderScene);
  //glutTimerFunc(1000, Timer, 1); // 1 mp mulva meghivodik a Timer() fuggveny
  //glutIdleFunc(Idle); // Idle(), ha nem tortenik semmi
  
  // << Callback fuggvenyek

  SetupRC();
  glutMainLoop();
  
  return 0;
}