/* Mala Sarkar
   CS307 Fall 2005
   Demo of Hanging Ceiling Light
*/

#include <stdio.h>
#include <math.h>
#include <tw.h> 
//#include "msarkar.cc"
#include <f05/objects.h>

//default light height
const int lightHeight = 30;
//default color of the light structure
twTriple mediumGray = {0.5,0.5,0.5};
//default color of the bulb
twTriple yellow = {1,1,0};

void setLight () {
  glEnable(GL_LIGHTING);
  //directional light
  GLfloat light0[4]={1,2,1,0}; 	 
  twGrayLight(GL_LIGHT0,light0,0.3,0.1,0.2);
}

void display(void) {
  twDisplayInit(); 
  twCamera(); //set up camera based on bounding box coordinates
  setLight(); 
  
  glShadeModel(GL_SMOOTH); 
  //draw ceiling light
  msarkarCeilingLight(lightHeight,mediumGray,yellow); 

  glFlush();
  glutSwapBuffers(); // necessary for animation  
}

int main(int argc, char** argv) {  
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
  twInitWindowSize(650,650);
  glutCreateWindow(argv[0]);
  glutDisplayFunc(display);
  //create a bounding box tailored to fit the hanging light and light shade
  twBoundingBox(-7,7,-lightHeight-lightHeight*0.1,0,-7.5,7.5);
  twMainInit(); 
  glutMainLoop();
  return 0;
}