/***************************************************************************
    gmf_visuals.cpp	- methods for visualization of simulation
                             -------------------
    begin                : Fri May 26th 2004
    copyright            : (C) 2004 by Andrew O'Neill,HiRes Grad Student
    email                : oneill@phys.columbia.edu
 ***************************************************************************/
 /* This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */


#include "gmf_visuals.h"

using namespace std;

void InitVisuals(int argc, char** argv)
{
#ifdef VISUALS
	if(!Config.Visuals)
	{
		dout(INFO) << "Not using Visuals" << endl;
		return;
	}
	VisualsInitialized = true;
	dout(INFO) << "Initializing Visuals" << endl;
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA);
	glutInitWindowSize(800,600);
	glutInitWindowPosition(100,100);
	glutCreateWindow("GMF Simulation");
//	glutFullScreen();
   glClearColor (0.0, 0.0, 0.0, 0.0);

	glutDisplayFunc(DrawDetector);
	glutReshapeFunc(Reshape);
	glutKeyboardFunc(Keyboard);
//	glutIdleFunc(DrawDetector);

//	glDepthFunc(GL_LESS);
//	glEnable(GL_DEPTH_TEST);

	glShadeModel(GL_SMOOTH);
	glEnable(GL_CULL_FACE);
	
	GLfloat ambient[] = {0.4, 0.4, 0.4, 1.0 };
	GLfloat position[] = {5.0, 5.0, 5.0, 1.0 };
	GLfloat diffuse[] = {0.5, 0.5, 0.5, 1.0};
	glEnable(GL_LIGHT0);
	glEnable(GL_LIGHTING);
	glLightfv(GL_LIGHT0, GL_POSITION, position);
	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
	glutMainLoop();
#endif
}

void DrawDetector()
{
#ifdef VISUALS
	glClear(GL_COLOR_BUFFER_BIT);
	glLoadIdentity();
	// gluLookAt (Camera_Pos, Looking_At, Up-Axis)
	gluLookAt(-2.0, 1.5, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0);
	glScalef(1, 1, 1);
	glRotatef(0.2, 0.0, 0.0, 1.0);
	glPushMatrix();
		glRotatef(0.2, 0.0, 0.0, 1.0);
		glColor4f(0.0,0.0,1.0, 0.5);

		// make a sphere to rep. the earth
		Vector3D Origin(0.0, 0.0, 0.0);	
		glTranslatef( Origin.East(Config.Detector)*ZoomFactor, 
		              Origin.North(Config.Detector)*ZoomFactor,  
		              Origin.Up(Config.Detector)*ZoomFactor  );
		glutSolidSphere(EarthRadius*ZoomFactor, 36, 18);
	
		// make a cube to show detector position	
		//glTranslatef (0.0, 0.0, 0.0);
		glTranslatef( -Origin.East(Config.Detector)*ZoomFactor, 
		              -Origin.North(Config.Detector)*ZoomFactor,  
		              -Origin.Up(Config.Detector)*ZoomFactor  );
	//	glutSetColor(0, 0.5, 0.8, 0.3, 0.7);
		glColor4f(1.0, 0.0, 0.0, 1.0);
		glutWireCube(0.05);
		glColor4f(0.0, 1.0, 0.0, 1.0);
	glPopMatrix();
	glutSwapBuffers();
//	DrawStack();
#endif
}

void Reshape(int w, int h)
{
#ifdef VISUALS
	glViewport(0, 0, (GLsizei) w, (GLsizei) h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glFrustum(-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
	glMatrixMode (GL_MODELVIEW);
#endif
}

void Keyboard (unsigned char key, int x, int y)
{
	switch (key)
	{
		case 27:
			exit(0);
			break;
		case 'm':
			MainSimLoop();
			break;
		default: 
			break;
	}
	
}

void Idle()
{
}