#include <GL/glut.h>
#include <iostream>
#include "Stair.h"
using namespace std;

void disp(void);
void idle(void);
void reshape(int x,int y);
void drawAxis(void);
void handleErr(void);
void keyb(unsigned char key, int x, int y);

static Stair *stair;

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

  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
  glutCreateWindow("Stair");
  glClearColor(0.0,0.0,0.0,0.0);

  stair = new Stair(0.50,0.05,0,0,0,5,20.0);
  glutDisplayFunc(disp);
  glutIdleFunc(idle);
  glutReshapeFunc(reshape);
  glutKeyboardFunc(keyb);
  glutMainLoop();
}



void disp(void){
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glColor3f(1.0,1.0,1.0);
  glPushMatrix();
  stair->draw();
  drawAxis();
  handleErr();
  glutSwapBuffers();
  glPopMatrix();
}

void drawAxis(){
  glBegin(GL_LINES);
  glColor3f(1.0,0.0,0.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.80,0.0,0.0);
  glColor3f(0.0,1.0,0.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.0,0.80,0.0);
  glColor3f(0.0,0.0,1.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.0,0.0,0.80);
  glEnd();

  glPushMatrix();
  glColor3f(1.0,0.0,0.0);
  glTranslatef(0.80,0.0,0.0);
  glRotatef(90,0.0,1.0,0.0);
  glutSolidCone(0.05,0.1,10,10);
  glPopMatrix();
  glPushMatrix();
  glColor3f(0.0,1.0,0.0);
  glTranslatef(0.0,0.80,0.0);
  glRotatef(-90,1.0,0.0,0.0);
  glutSolidCone(0.05,0.1,10,10);
  glPopMatrix();
  glPushMatrix();
  glColor3f(0.0,0.0,1.0);
  glTranslatef(0.0,0.0,0.80);
  glutSolidCone(0.05,0.1,10,10);
  glPopMatrix();

}

void idle(void){
 
  glutPostRedisplay();
}


void keyb(unsigned char key, int x, int y){
 stair->setAngle(stair->getAngle()+1.0);
}

void reshape(int x,int y){
  glViewport(0,0,x,y);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(50,(x*1.0)/(y*1.0),1,6);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  gluLookAt(2.0,0,0,0,0,0,0,1,0);
}

void handleErr(void){
  static GLenum errCode;
  errCode = glGetError();
  if(errCode != GL_NO_ERROR){
    cout << gluErrorString(errCode) << endl;;
  }
}