/***********************
* Johnny Jetpack
* by Paul Adam and Jamie Bradley
* 
* misc.c
*
* this file contains miscilaneous, global lighting and material functions
*************************/


#include <glut.h>
#include <GL/gl.h>
#include <GL/glu.h>



/*****************************************************
This function simply disables lighting
*****************************************************/
void disable(void)
{
  glDisable(GL_LIGHTING);
  glDisable(GL_NORMALIZE);
  return;
}


/*****************************************************
This function simply turns on lighting
*****************************************************/
void lighting(void)
{
  GLfloat position[] = {25, 25, 0, 1};
  GLfloat position1[] = {-25, 25, 0, 1.0}; 
  GLfloat amb[] = {1.0, 0.0, 0.0, 1.0}; 
  GLfloat diff[] = {1.0, 0.0, 0.0, 1.0}; 
  GLfloat spec[] = {1.0, 1.0, 1.0, 1.0};

  glEnable(GL_LIGHTING); 
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHT1); 
  glEnable(GL_NORMALIZE); 
  glDepthFunc(GL_LESS); 

  glLightf(GL_LIGHT0, GL_SPOT_CUTOFF, 150.0);  
  glLightfv(GL_LIGHT0, GL_POSITION, position);  

  glLightfv(GL_LIGHT1, GL_AMBIENT, amb); 
  glLightfv(GL_LIGHT1, GL_DIFFUSE, diff);
  glLightfv(GL_LIGHT1, GL_SPECULAR, spec); 
  glLightfv(GL_LIGHT1, GL_POSITION, position1); 
  glLightf(GL_LIGHT1, GL_SPOT_CUTOFF, 120.0);

  glEnable(GL_LIGHTING);
  return;
}



/*******************************************************
This function simply sets the material parameters for a
filled polygon.  The array is either red, green or gray,
which are given above.  To add a color, simply specify
a new color (as a 4D array -> (red, green, blue, 1) where
red, green and blue range from 0->1), and call this function
before you draw the object.
*********************************************************/
void Set_Mat (float col[])  
{
  GLfloat mat_shininess = 128.0 * 0.4; 

  glMaterialfv(GL_FRONT, GL_SPECULAR, col); 
  glMaterialfv(GL_FRONT, GL_AMBIENT, col); 
  glMaterialfv(GL_FRONT, GL_DIFFUSE, col); 
  glMaterialfv(GL_FRONT, GL_SHININESS, &mat_shininess);  
  return;
}