/* material.c */

/*
     Purpose: demonstrate lighting
*/


#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif

#include <stdlib.h>

#define KEY_ESC 27      /* glut doesn't define this one  */



/* Module level variables */
GLfloat mAngle = 0;

/* Module level constants */

/*
	The following are material definitions for the body.
	Ambiance, Diffuse, Specular, Shininess
*/
static float mMaterials[] = { /* Totally weird material */
    1.0, 	0.0, 	0.0,	1.000000,
    0.0,	1.0,	0.0,	1.000000,
    0.0,	0.0,	1.0,	1.000000,
    10.00000,	0.0,	0.0,	0.0,
    /* Brass */
    0.329412, 0.223529, 0.027451, 1.000000,
    0.780392, 0.568627, 0.113725, 1.000000,
    0.992157, 0.941176, 0.807843, 1.000000,
    27.897400, 0.0	, 0.0	, 0.0,
    /* Bronze */
    0.212500, 0.127500, 0.054000, 1.000000,
    0.714000, 0.428400, 0.181440, 1.000000,
    0.393548, 0.271906, 0.166721, 1.000000,
    25.600000, 0.0	, 0.0	, 0.0,
    /* Polished_Bronze */
    0.250000, 0.148000, 0.064750, 1.000000,
    0.400000, 0.236800, 0.103600, 1.000000,
    0.774597, 0.458561, 0.200621, 1.000000,
    76.800003, 0.0	, 0.0	, 0.0,
    /* Chrome */
    0.250000, 0.250000, 0.250000, 1.000000,
    0.400000, 0.400000, 0.400000, 1.000000,
    0.774597, 0.774597, 0.774597, 1.000000,
    76.800003, 0.0	, 0.0	, 0.0,
    /* Copper */
    0.191250, 0.073500, 0.022500, 1.000000,
    0.703800, 0.270480, 0.082800, 1.000000,
    0.256777, 0.137622, 0.086014, 1.000000,
    12.800000, 0.0	, 0.0	, 0.0,
    /* Polished_Copper */
    0.229500, 0.088250, 0.027500, 1.000000,
    0.550800, 0.211800, 0.066000, 1.000000,
    0.580594, 0.223257, 0.069570, 1.000000,
    51.200001, 0.0	, 0.0	, 0.0,
    /* Gold */
    0.247250, 0.199500, 0.074500, 1.000000,
    0.751640, 0.606480, 0.226480, 1.000000,
    0.628281, 0.555802, 0.366065, 1.000000,
    51.200001, 0.0	, 0.0	, 0.0,
    /* Polished_Gold */
    0.247250, 0.224500, 0.064500, 1.000000,
    0.346150, 0.314300, 0.090300, 1.000000,
    0.797357, 0.723991, 0.208006, 1.000000,
    83.199997, 0.0	, 0.0	, 0.0,
    /* Pewter */
    0.105882, 0.058824, 0.113725, 1.000000,
    0.427451, 0.470588, 0.541176, 1.000000,
    0.333333, 0.333333, 0.521569, 1.000000,
    9.846150, 0.0	, 0.0	, 0.0,
    /* Silver */
    0.192250, 0.192250, 0.192250, 1.000000,
    0.507540, 0.507540, 0.507540, 1.000000,
    0.508273, 0.508273, 0.508273, 1.000000,
    51.200001, 0.0	, 0.0	, 0.0,
    /* Polished_Silver */
    0.231250, 0.231250, 0.231250, 1.000000,
    0.277500, 0.277500, 0.277500, 1.000000,
    0.773911, 0.773911, 0.773911, 1.000000,
    89.599998, 0.0	, 0.0	, 0.0,
    /* Emerald */
    0.021500, 0.174500, 0.021500, 0.550000,
    0.075680, 0.614240, 0.075680, 0.550000,
    0.633000, 0.727811, 0.633000, 0.550000,
    76.800003, 0.0	, 0.0	, 0.0,
    /* Jade */
    0.135000, 0.222500, 0.157500, 0.950000,
    0.540000, 0.890000, 0.630000, 0.950000,
    0.316228, 0.316228, 0.316228, 0.950000,
    12.800000, 0.0	, 0.0	, 0.0,
    /* Obsidian */
    0.053750, 0.050000, 0.066250, 0.820000,
    0.182750, 0.170000, 0.225250, 0.820000,
    0.332741, 0.328634, 0.346435, 0.820000,
    38.400002, 0.0	, 0.0	, 0.0,
    /* Pearl */
    0.250000, 0.207250, 0.207250, 0.922000,
    1.000000, 0.829000, 0.829000, 0.922000,
    0.296648, 0.296648, 0.296648, 0.922000,
    11.264000, 0.0	, 0.0	, 0.0,
    /* Ruby */
    0.174500, 0.011750, 0.011750, 0.550000,
    0.614240, 0.041360, 0.041360, 0.550000,
    0.727811, 0.626959, 0.626959, 0.550000,
    76.800003, 0.0	, 0.0	, 0.0,
    /* Turquoise */
    0.100000, 0.187250, 0.174500, 0.800000,
    0.396000, 0.741510, 0.691020, 0.800000,
    0.297254, 0.308290, 0.306678, 0.800000,
    12.800000, 0.0	, 0.0	, 0.0,
    /* Black_Plastic */
    0.000000, 0.000000, 0.000000, 1.000000,
    0.010000, 0.010000, 0.010000, 1.000000,
    0.500000, 0.500000, 0.500000, 1.000000,
    32.000000, 0.0	, 0.0	, 0.0,
    /* Black_Rubber */
    0.020000, 0.020000, 0.020000, 1.000000,
    0.010000, 0.010000, 0.010000, 1.000000,
    0.400000, 0.400000, 0.400000, 1.000000,
    10.000000, 0.0	, 0.0	, 0.0
};


GLvoid display( GLvoid )
{
	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
	glLoadIdentity();

	glRotatef( mAngle, 1, 1, 0 );

	/* Note that glut defines the normals for its 3D objects */
	glutSolidTorus( 0.3, 0.6, 200, 200 );

	glutSwapBuffers();
}


GLvoid keyboard( GLubyte key, GLint x, GLint y)
{
	static GLuint    currentMatIndex = 0;

	switch (key)
	{
	case KEY_ESC:   /* exit when escape key is pressed */
    	exit(0);
   	break;

	case 'l':
	case 'L':
	{
		static GLboolean lightOn = GL_FALSE;
		lightOn = !lightOn;
		/* Turn on/off the OpenGL lighting calculations */
		lightOn ? glEnable( GL_LIGHTING ) : glDisable( GL_LIGHTING );
	}
	break;

	case ' ':
	    /* Set up a material for our torus */
	    currentMatIndex += 16;
	    glMaterialfv( GL_FRONT, GL_AMBIENT,   &(mMaterials[0 + currentMatIndex]) );
        glMaterialfv( GL_FRONT, GL_DIFFUSE,   &(mMaterials[4 + currentMatIndex]) );
        glMaterialfv( GL_FRONT, GL_SPECULAR,  &(mMaterials[8 + currentMatIndex]) );
        glMaterialf(  GL_FRONT, GL_SHININESS, mMaterials[12 + currentMatIndex]   );

	    /* and set a colur for the non lit mode */
	    glColor4fv( &(mMaterials[4 + currentMatIndex]) );
	break;

	}
	glutPostRedisplay();
}

GLvoid specialkeys( GLint key, GLint x, GLint y)
{
	switch( key )
	{
	case GLUT_KEY_RIGHT:
		mAngle += 2.0;
	break;
	case GLUT_KEY_LEFT:
		mAngle -= 2.0;
	break;
	}
	glutPostRedisplay();
}

void init( void )
{
	
	/* What colour is the ambient light */
	GLfloat pAmbientLightModel[] = { 0.2, 0.2, 0.2, 1.0 };
	/*GLfloat pAmbientLightModel[] = { 0.0, 0.0, 0.0, 1.0 };*/

	/* Get some ambient light */
	glLightModelfv(	GL_LIGHT_MODEL_AMBIENT, pAmbientLightModel );

	/* Get an infinite, but directional light (like a sun) */
	glEnable( GL_LIGHT0 );
	glLightfv( GL_LIGHT0, GL_AMBIENT, pAmbientLightModel );

	/* Set up a material for our torus */
	glMaterialfv( GL_FRONT, GL_AMBIENT,   &(mMaterials[0]) );
  	glMaterialfv( GL_FRONT, GL_DIFFUSE,   &(mMaterials[4]) );
  	glMaterialfv( GL_FRONT, GL_SPECULAR,  &(mMaterials[8]) );
  	glMaterialf(  GL_FRONT, GL_SHININESS, mMaterials[12] );

	/* and set a colour for the non lit mode */
 	glColor4fv( &( mMaterials[4] ) );

	/*glEnable( GL_CULL_FACE );*/
	/*glLightModeli( GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE );*/

	glEnable( GL_DEPTH_TEST );

}



void reshape(GLint width, GLint height)
{
     /* We still want the output to cover the whole window */
        glViewport(0, 0, width, height);

        glMatrixMode( GL_PROJECTION );
        glLoadIdentity();
	    glOrtho(-1, 1, -1, 1, -1, 1);
        glMatrixMode( GL_MODELVIEW );
}



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

	glutInit( &argc, argv );
	glutInitDisplayMode( GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA );
	glutCreateWindow( argv[0] );

	glutDisplayFunc( display );
	glutKeyboardFunc( keyboard );
	glutSpecialFunc( specialkeys );
	glutReshapeFunc( reshape );
	init();

	glutMainLoop();

	return 0;
}