From 99778e9b85bd4a16a9055587a273446068577100 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 2 May 2006 19:12:46 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in r2,
 which included commits to RCS files with non-trunk default branches.

---
 glgrav.cpp | 955 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 955 insertions(+)
 create mode 100644 glgrav.cpp

(limited to 'glgrav.cpp')

diff --git a/glgrav.cpp b/glgrav.cpp
new file mode 100644
index 0000000..3586e7d
--- /dev/null
+++ b/glgrav.cpp
@@ -0,0 +1,955 @@
+//
+//  glgrav - OpenGL N-Body gravity simulator
+//
+//  Copyright (C) 2003  Ian Cowburn (ianc@noddybox.demon.co.uk)
+//
+//  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
+//
+//  -------------------------------------------------------------------------
+//
+//  Main
+//
+static const char id[]="$Id$";
+
+#include "global.h"
+#include "config.h"
+#include "mass.h"
+#include "particles.h"
+#include "sparks.h"
+
+#include <cstdarg>
+#include <ctime>
+
+static Config		config;
+static vector<Mass>	mass;
+static Particles	*particles=0;
+static Sparks		*sparks=0;
+
+static int	win;
+static int	width=100;
+static int	height=100;
+static GLfloat	particleSize=1.0f;
+
+#define MENU_SOLID	1
+#define MENU_LIGHTING	2
+#define MENU_TEXTURE	3
+#define MENU_PARTICLES	4
+#define MENU_SPARKS	5
+#define MENU_FOG	6
+#define	MENU_RESETPOS	7
+#define MENU_QUIT	8
+#define LOOK_NONE	-1
+
+#define MENU_TRAVEL	1000
+#define MENU_LOOK	2000
+#define MENU_FRAME_SKIP	3000
+
+static int	menu;
+static int	travel_menu;
+static int	look_menu;
+static int	frame_skip_menu;
+
+#ifdef DEBUG
+
+#define DBG_DUMPOBJ	1
+static int	debug_menu;
+static void	DebugMenu(int item);
+#endif
+
+static bool		solid;
+static bool		light;
+static bool		texture;
+static bool		render_particles;
+static bool		render_sparks;
+static vector<string>	look;
+static int		travel_as=LOOK_NONE;
+static int		look_at=LOOK_NONE;
+static int		frame_skip=0;
+static int		frame=0;
+static bool		fog=false;
+static bool		fog_light=false;
+static GLfloat		fog_col[4]={0.0f,0.0f,0.0f,1.0f};
+
+static struct
+	{
+	GLfloat	x,y,z;
+	GLfloat	ang;
+	GLfloat	speed;
+	} camera={0.0f,0.0f,0.0f,0.0f,0.0f};
+
+static struct
+	{
+	int	mx,my;
+	bool	lmb;
+	bool	shift;
+	bool	ctrl;
+	bool	pgup;
+	bool	pgdn;
+	} control;
+
+static void	Reshape(int w,int h);
+static void	Mouse(int b,int s, int x, int y);
+static void	Move(int x, int y);
+static void	Display(void);
+static void	Update(void);
+static void	Menu(int item);
+static void	TravelMenu(int item);
+static void	LookMenu(int item);
+static void	FrameSkipMenu(int item);
+static void	Key(int key, int mx, int my);
+
+static void	HandleCollision(Config::Collide collide,
+				vector<bool>& del,vector<Mass>& mv,
+				Mass& m1, Mass& m2, int idx1, int idx2);
+static void	SetOption(int opt, string text, bool flag);
+static void	GLPrint(char *fmt,...);
+
+
+int main(int argc, char *argv[])
+{
+    int f;
+
+    srand(time(0));
+
+    // Init GLUT display.  Note window is created here to be reshaped later
+    // as it appears necessary for textures to work!
+    //
+    glutInit(&argc,argv);
+    glutInitWindowSize(width,height);
+    glutInitDisplayMode(GLUT_RGBA|GLUT_DOUBLE|GLUT_DEPTH);
+
+    win=glutCreateWindow(argv[0]);
+
+
+    // Program initialisation
+    //
+    mass.clear();
+
+    if (!config.read(argc == 2 ? argv[1] : "dat",mass))
+    	{
+	cerr << "Config file reading failed : \n" << config.error() << endl;
+	exit(1);
+	}
+
+    config.getCamera(camera.x,camera.y,camera.z,camera.ang);
+
+    solid=config.enabled(Config::solid);
+    light=config.enabled(Config::lighting);
+    texture=config.enabled(Config::texture);
+    config.look(look);
+    config.getLookAndTravel(look_at,travel_as);
+    fog=config.enabled(Config::fog);
+
+    if (config.particlesDefined())
+    	{
+	GLfloat adec,amin;
+
+	config.getParticles(adec,amin,particleSize);
+	particles=new Particles(adec,amin);
+	render_particles=true;
+	}
+    else
+	render_particles=false;
+
+    if (config.sparksDefined())
+    	{
+	int num,len;
+	GLfloat adec,amin,delta;
+
+	config.getSparks(num,adec,amin,len,delta);
+    	sparks=new Sparks(num,adec,amin,len,delta);
+	render_sparks=true;
+	}
+    else
+	render_sparks=false;
+
+    config.windowSize(width,height);
+
+    width=max(width,100);
+    height=max(height,100);
+
+#   ifdef DEBUG
+	{
+	vector<Mass>::size_type f;
+
+	for(f=0;f<mass.size();f++)
+	    cout << "Initial : " << mass[f] << endl;
+	}
+#   endif
+
+    glutDisplayFunc(Display);
+    glutMouseFunc(Mouse);
+    glutMotionFunc(Move);
+    glutPassiveMotionFunc(Move);
+    glutReshapeFunc(Reshape);
+    glutSpecialFunc(Key);
+    glutIdleFunc(Update);
+
+    // Menu initialisation
+    //
+    menu=glutCreateMenu(Menu);
+    glutAddMenuEntry("X",MENU_SOLID);
+    glutAddMenuEntry("X",MENU_LIGHTING);
+    glutAddMenuEntry("X",MENU_TEXTURE);
+    glutAddMenuEntry("X",MENU_PARTICLES);
+    glutAddMenuEntry("X",MENU_SPARKS);
+    glutAddMenuEntry("X",MENU_FOG);
+    glutAddMenuEntry("Reset Position",MENU_RESETPOS);
+
+    SetOption(MENU_SOLID,"Solid",solid);
+    SetOption(MENU_LIGHTING,"Lighting",light);
+    SetOption(MENU_TEXTURE,"Textures",texture);
+    SetOption(MENU_PARTICLES,"Particles",render_particles);
+    SetOption(MENU_SPARKS,"Sparks",render_sparks);
+    SetOption(MENU_FOG,"Fog",fog);
+
+    // Create look and travel menus
+    //
+    vector<string>::size_type li;
+
+    travel_menu=glutCreateMenu(TravelMenu);
+    glutAddMenuEntry("None",MENU_TRAVEL+LOOK_NONE);
+
+    look_menu=glutCreateMenu(LookMenu);
+    glutAddMenuEntry("None",MENU_LOOK+LOOK_NONE);
+
+    for(li=0;li<look.size();li++)
+    	{
+	glutSetMenu(travel_menu);
+	glutAddMenuEntry(look[li].c_str(),MENU_TRAVEL+li);
+	glutSetMenu(look_menu);
+	glutAddMenuEntry(look[li].c_str(),MENU_LOOK+li);
+	}
+
+    // Create frame skip menu
+    //
+    frame_skip_menu=glutCreateMenu(FrameSkipMenu);
+
+    for(f=0;f<20;f++)
+    	{
+	char s[64];
+	int skip;
+
+	if (f)
+	    {
+	    skip=f+1;
+	    sprintf(s,"Draw every %d frames",skip);
+	    }
+	else
+	    {
+	    skip=f;
+	    strcpy(s,"No frame skip");
+	    }
+
+	glutAddMenuEntry(s,MENU_FRAME_SKIP+skip);
+	}
+
+    glutSetMenu(menu);
+    glutAddSubMenu("Travel as",travel_menu);
+    glutAddSubMenu("Look at",look_menu);
+    glutAddSubMenu("Frame skip",frame_skip_menu);
+    glutAddMenuEntry("Quit",MENU_QUIT);
+    glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+    // Create optional debug menu
+    //
+#   ifdef DEBUG
+	{
+	debug_menu=glutCreateMenu(DebugMenu);
+	glutAddMenuEntry("Dump Objects",DBG_DUMPOBJ);
+	glutSetMenu(menu);
+	glutAddSubMenu("DEBUG",debug_menu);
+	}
+#   endif
+
+    // Open GL initialisation
+    //
+    glShadeModel(GL_SMOOTH);
+
+    if (!light)
+    	glDisable(GL_LIGHTING);
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_COLOR_MATERIAL);
+    glEnable(GL_CULL_FACE);
+    glEnable(GL_POINT_SMOOTH);
+
+    glClearColor(0.0f,0.0f,0.0f,1.0);
+
+    glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+
+    if (fog)
+    	{
+	GLfloat dist;
+
+	config.getFog(dist,fog_col[0],fog_col[1],fog_col[2],fog_light);
+
+	glFogfv(GL_FOG_COLOR,fog_col);
+	glFogf(GL_FOG_START,0.0f);
+	glFogf(GL_FOG_END,dist);
+	glFogi(GL_FOG_MODE,GL_LINEAR);
+
+	glClearColor(fog_col[0],fog_col[1],fog_col[2],1.0);
+	}
+
+    // Enter the main loop
+    //
+    glutReshapeWindow(width,height);
+    glutMainLoop();
+
+    return EXIT_SUCCESS;
+}
+
+
+static void Reshape(int w,int h)
+{
+    width=w;
+    height=h;
+
+    glViewport(0,0,w,h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,1.0f,100000.0f);
+    glMatrixMode(GL_MODELVIEW);
+}
+
+
+static void Mouse(int b,int s, int x, int y)
+{
+    int mod=glutGetModifiers();
+
+    if (b==GLUT_LEFT_BUTTON)
+    	{
+	control.lmb=(s==GLUT_DOWN);
+
+	control.shift=mod&GLUT_ACTIVE_SHIFT;
+	control.ctrl=mod&GLUT_ACTIVE_CTRL;
+	}
+}
+
+
+static void Move(int x,int y)
+{
+    control.mx=x;
+    control.my=y;
+}
+
+
+static void Menu(int item)
+{
+#ifdef DEBUG
+    cout << "Menu(" << item << ")\n";
+#endif
+
+    switch (item)
+    	{
+	case MENU_SOLID:
+	    solid=!solid;
+	    SetOption(MENU_SOLID,"Solid",solid);
+	    break;
+
+	case MENU_LIGHTING:
+	    light=!light;
+	    SetOption(MENU_LIGHTING,"Lighting",light);
+
+	    if (!light)
+		glDisable(GL_LIGHTING);
+	    break;
+
+	case MENU_TEXTURE:
+	    texture=!texture;
+	    SetOption(MENU_TEXTURE,"Texture",texture);
+	    break;
+
+	case MENU_RESETPOS:
+	    config.getCamera(camera.x,camera.y,camera.z,camera.ang);
+	    break;
+
+	case MENU_PARTICLES:
+	    render_particles=!render_particles;
+	    SetOption(MENU_PARTICLES,"Particles",render_particles);
+	    break;
+
+	case MENU_SPARKS:
+	    render_sparks=!render_sparks;
+	    SetOption(MENU_SPARKS,"Sparks",render_sparks);
+	    break;
+
+	case MENU_FOG:
+	    if (config.enabled(Config::fog))
+	    	{
+		fog=!fog;
+		SetOption(MENU_FOG,"Fog",fog);
+
+		if (fog)
+		    glClearColor(fog_col[0],fog_col[1],fog_col[2],1.0);
+		else
+		    glClearColor(0.0f,0.0f,0.0f,1.0);
+		}
+	    break;
+
+	case MENU_QUIT:
+	    exit(EXIT_SUCCESS);
+	    break;
+	}
+}
+
+
+static void TravelMenu(int item)
+{
+#ifdef DEBUG
+    cout << "TravelMenu(" << item << ")\n";
+#endif
+
+    int old=travel_as;
+
+    travel_as=item-MENU_TRAVEL;
+
+    if (travel_as!=LOOK_NONE and look_at==travel_as)
+    	travel_as=old;
+}
+
+
+static void LookMenu(int item)
+{
+#ifdef DEBUG
+    cout << "LookMenu(" << item << ")\n";
+#endif
+
+    int old=look_at;
+
+    look_at=item-MENU_LOOK;
+
+    if (look_at!=LOOK_NONE and look_at==travel_as)
+    	look_at=old;
+}
+
+
+static void FrameSkipMenu(int item)
+{
+#ifdef DEBUG
+    cout << "FrameSkipMenu(" << item << ")\n";
+#endif
+
+    frame_skip=item-MENU_FRAME_SKIP;
+}
+
+
+#ifdef DEBUG
+static void DebugMenu(int item)
+{
+    vector<Mass>::size_type f;
+
+    switch (item)
+    	{
+	case DBG_DUMPOBJ:
+	    for(f=0;f<mass.size();f++)
+	    	cout << mass[f] << endl;
+	    break;
+	}
+}
+#endif
+
+
+static void SetOption(int opt, string text, bool flag)
+{
+    if (flag)
+    	text+=" Off";
+    else
+    	text+=" On";
+
+    glutChangeToMenuEntry(opt,text.c_str(),opt);
+}
+
+
+static void Key(int key, int mx, int my)
+{
+    switch(key)
+    	{
+	case GLUT_KEY_PAGE_DOWN:
+	    control.pgdn=true;
+	    break;
+
+	case GLUT_KEY_PAGE_UP:
+	    control.pgup=true;
+	    break;
+
+	default:
+	    break;
+	}
+}
+
+
+static void SetView()
+{
+    Mass lm;
+
+    glLoadIdentity();
+
+    if ((look_at!=LOOK_NONE)&&(findMass(mass,look[look_at],lm)))
+	{
+	double x,y,z;
+
+	lm.getPosition(x,y,z);
+
+	// TODO: The last parameters (0,1,0) are the UP vector, and need
+	//       some calculating to prevent awkward looking 'flips'
+	//
+	gluLookAt(static_cast<GLdouble>(camera.x),
+		  static_cast<GLdouble>(camera.y),
+		  static_cast<GLdouble>(camera.z),
+		  x,y,z,
+		  0.0,1.0,0.0);
+	}
+    else
+	{
+	glRotatef(360.0-camera.ang,0.0f,1.0f,0.0f);
+	glTranslatef(-camera.x,-camera.y,-camera.z);
+	}
+}
+
+
+static void DrawMasses(Mass::DrawItem item)
+{
+    vector<Mass>::const_iterator i;
+    Mass lm;
+
+    for(i=mass.begin();i!=mass.end();i++)
+	{
+	SetView();
+
+	if (light)
+	    {
+	    GLfloat light[4];
+	    GLfloat pos[4];
+	    string name;
+
+	    name=config.light(light);
+
+	    if (name!=i->getName() && findMass(mass,name,lm))
+	    	{
+		double x,y,z;
+
+		lm.getPosition(x,y,z);
+
+		pos[0]=static_cast<GLfloat>(x);
+		pos[1]=static_cast<GLfloat>(y);
+		pos[2]=static_cast<GLfloat>(z);
+		pos[3]=1.0f;
+
+		glLightfv(GL_LIGHT1,GL_DIFFUSE,light);
+		glLightfv(GL_LIGHT1,GL_POSITION,pos);
+		glEnable(GL_LIGHTING);
+		glEnable(GL_LIGHT1);
+
+		if (fog)
+		    glEnable(GL_FOG);
+		}
+	    else
+		{
+		if (!fog_light)
+		    glDisable(GL_FOG);
+		glDisable(GL_LIGHTING);
+		}
+	    }
+
+	i->draw(solid,texture,item);
+	}
+}
+
+
+static void Display(void)
+{
+    Mass lm;
+
+    /* Looking up/down doesn't work yet...
+    */
+    if ((travel_as!=LOOK_NONE)&&(findMass(mass,look[travel_as],lm)))
+	{
+	double x,y,z;
+
+	lm.getPosition(x,y,z);
+
+	camera.x=static_cast<GLfloat>(x);
+	camera.y=static_cast<GLfloat>(y);
+	camera.z=static_cast<GLfloat>(z);
+	}
+    else
+    	{
+	GLPrint("Pos: %d,%d,%d",(int)camera.x,(int)camera.y,(int)camera.z);
+	GLPrint("Angle: %d",(int)camera.ang);
+	}
+
+    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+
+    if (fog)
+	glEnable(GL_FOG);
+    else
+	glDisable(GL_FOG);
+
+    DrawMasses(Mass::eMass);
+
+    glEnable(GL_BLEND);
+
+    DrawMasses(Mass::eRing);
+
+    glDisable(GL_LIGHT1);
+    glDisable(GL_LIGHTING);
+    glDisable(GL_TEXTURE_2D);
+
+    if (fog)
+	glEnable(GL_FOG);
+
+    if (particles && render_particles)
+    	{
+	glPointSize(particleSize);
+	particles->draw();
+	}
+
+    if (sparks && render_sparks)
+	{
+	glPointSize(1);
+    	sparks->draw();
+	}
+
+    glDisable(GL_BLEND);
+
+    glFlush();
+    glutSwapBuffers();
+}
+
+
+static void Shatter(vector<Mass>& mv, Mass& m,int no,double delta,int shield)
+{
+    double px,py,pz;
+    double npx,npy,npz;
+    double dx,dy,dz;
+    double ndx,ndy,ndz;
+    GLfloat r,g,b;
+    int f;
+    string name;
+    bool texture;
+    GLuint id;
+    double nm;
+    int size;
+
+    nm=m.getMass()/no;
+    m.getDelta(dx,dy,dz);
+    m.getPosition(px,py,pz);
+    size=static_cast<int>(m.getSize());
+    m.getColour(r,g,b);
+    name=m.getName();
+    texture=m.getTexture(id);
+
+    for(f=0;f<no;f++)
+	if (mv.size()<config.maxMass())
+	    {
+	    npx=px+RND(size*2)-size;
+	    npy=py+RND(size*2)-size;
+	    npz=pz+RND(size*2)-size;
+
+	    if (npx<px)
+		ndx=dx-DRand()*delta;
+	    else
+		ndx=dx+DRand()*delta;
+
+	    if (npy<py)
+		ndy=dy-DRand()*delta;
+	    else
+		ndy=dy+DRand()*delta;
+
+	    if (npz<pz)
+		ndz=dz-DRand()*delta;
+	    else
+		ndz=dz+DRand()*delta;
+
+	    Mass m(name,nm,config.scale(),
+		   npx,npy,npz,ndx,ndy,ndz,r,g,b,0.5,shield);
+
+	    if (texture)
+		m.setTexture(id);
+
+	    mv.push_back(m);
+	    }
+
+}
+
+
+static void HandleCollision(Config::Collide collide,
+			    vector<bool>& del,vector<Mass>& mv,
+			    Mass& m1, Mass& m2, int idx1, int idx2)
+{
+    Mass *win;
+    Mass *lose;
+    double merge_mass;
+    double dx,dy,dz;
+    double odx,ody,odz;
+    int no;
+    double delta,min,max;
+    int shield;
+
+    switch(collide)
+    	{
+	case Config::merge:
+	    if (m1.getMass()>=m2.getMass())
+	    	{
+		win=&m1;
+		lose=&m2;
+		del[idx2]=true;
+		}
+	    else
+	    	{
+		win=&m2;
+		lose=&m1;
+		del[idx1]=true;
+		}
+
+	    merge_mass=win->getMass()+lose->getMass();
+
+	    win->reset(merge_mass);
+
+	    if (sparks)
+	    	{
+		double x1,y1,z1;
+		double x2,y2,z2;
+
+		m1.getPosition(x1,y1,z1);
+		m2.getPosition(x2,y2,z2);
+
+		sparks->add(x1+(x2-x1)/2,
+			    y1+(y2-y1)/2,
+			    z1+(z2-z1)/2);
+		}
+
+	    break;
+
+	case Config::delta_merge:
+	    if (m1.getMass()>=m2.getMass())
+	    	{
+		win=&m1;
+		lose=&m2;
+		del[idx2]=true;
+		}
+	    else
+	    	{
+		win=&m2;
+		lose=&m1;
+		del[idx1]=true;
+		}
+
+	    win->getDelta(odx,ody,odz);
+	    lose->getDelta(dx,dy,dz);
+
+	    odx+=dx*(lose->getMass()/win->getMass());
+	    ody+=dy*(lose->getMass()/win->getMass());
+	    odz+=dz*(lose->getMass()/win->getMass());
+
+	    merge_mass=win->getMass()+lose->getMass();
+
+	    win->reset(merge_mass,odx,ody,odz);
+
+	    if (sparks)
+	    	{
+		double x1,y1,z1;
+		double x2,y2,z2;
+
+		m1.getPosition(x1,y1,z1);
+		m2.getPosition(x2,y2,z2);
+
+		sparks->add(x1+(x2-x1)/2,
+			    y1+(y2-y1)/2,
+			    z1+(z2-z1)/2);
+		}
+
+	    break;
+
+	case Config::shatter:
+	    config.getShatter(no,delta,min,max,shield);
+
+	    if (m1.getMass()<min || m2.getMass()<min)
+		{
+		HandleCollision(Config::merge,del,mv,m1,m2,idx1,idx2);
+		return;
+		}
+
+	    if ((m1.getMass()<max && m2.getMass()>=max) ||
+		    (m2.getMass()<max && m1.getMass()>=max))
+		{
+		HandleCollision(Config::merge,del,mv,m1,m2,idx1,idx2);
+		return;
+		}
+
+	    Shatter(mv,m1,no,delta,shield);
+	    Shatter(mv,m2,no,delta,shield);
+
+	    if (sparks)
+	    	{
+		double x1,y1,z1;
+		double x2,y2,z2;
+
+		m1.getPosition(x1,y1,z1);
+		m2.getPosition(x2,y2,z2);
+
+		sparks->add(x1+(x2-x1)/2,
+			    y1+(y2-y1)/2,
+			    z1+(z2-z1)/2);
+		}
+
+	    del[idx1]=true;
+	    del[idx2]=true;
+
+	    break;
+
+	case Config::none:
+	    break;
+
+	default:
+	    break;
+	}
+}
+
+
+static void Update(void)
+{
+    vector<Mass> new_mass;
+    vector<bool> del_mass;
+    vector<Mass>::size_type f,r;
+    GLfloat mva;
+
+    new_mass=mass;
+
+    for(f=0;f<mass.size();f++)
+    	del_mass.push_back(false);
+
+    for(f=0;f<mass.size();f++)
+    	for(r=0;r<mass.size();r++)
+	    if (f!=r && !del_mass[f] && !del_mass[r])
+	    	if (new_mass[f].calcAttraction(mass[r],config.gravConst()))
+		    HandleCollision
+			    (config.collide(),
+			     del_mass,new_mass,new_mass[f],mass[r],f,r);
+
+    mass.clear();
+
+    for(f=0;f<new_mass.size();f++)
+    	if (f>mass.size() || !del_mass[f])
+	    mass.push_back(new_mass[f]);
+
+    for(f=0;f<mass.size();f++)
+	{
+	GLfloat r,g,b;
+	double x,y,z;
+	double px,py,pz;
+
+    	mass[f].move();
+
+	mass[f].getColour(r,g,b);
+	mass[f].getPosition(x,y,z);
+	mass[f].getPreviousPosition(px,py,pz);
+
+	if (particles && !mass[f].isMassless())
+	    particles->add(static_cast<GLfloat>(x),
+			   static_cast<GLfloat>(y),
+			   static_cast<GLfloat>(z),
+			   static_cast<GLfloat>(px),
+			   static_cast<GLfloat>(py),
+			   static_cast<GLfloat>(pz),
+			   r,g,b);
+	}
+
+    mva=(control.mx-(width/2))/(100.0f*width/800.0);
+
+    if (mva<-0.5 || mva>0.5)
+	{
+	camera.ang-=mva;
+
+	if (camera.ang<0.0)
+	    camera.ang+=360.0;
+	else if (camera.ang>=360.0)
+	    camera.ang-=360.0;
+	}
+
+    if (control.pgup)
+    	camera.y+=10;
+
+    if (control.pgdn)
+    	camera.y-=10;
+
+    control.pgup=false;
+    control.pgdn=false;
+
+    if (control.lmb)
+    	{
+	if (camera.speed<20.0)
+	    camera.speed+=0.5;
+
+	if (control.ctrl)
+	    camera.speed*=10;
+
+	if (control.shift)
+	    {
+	    camera.x+=(GLfloat)(sin(camera.ang*M_PI/180.0)*camera.speed);
+	    camera.z+=(GLfloat)(cos(camera.ang*M_PI/180.0)*camera.speed);
+	    }
+	else
+	    {
+	    camera.x-=(GLfloat)(sin(camera.ang*M_PI/180.0)*camera.speed);
+	    camera.z-=(GLfloat)(cos(camera.ang*M_PI/180.0)*camera.speed);
+	    }
+
+	if (control.ctrl)
+	    camera.speed/=10;
+	}
+    else
+    	{
+	if (camera.speed>0.0)
+	    camera.speed-=0.5;
+
+	if (camera.speed<0.0)
+	    camera.speed+=0.5;
+	}
+
+    frame++;
+
+    if (sparks)
+	sparks->update();
+
+    if (particles)
+	particles->update();
+
+    if (!frame_skip || (frame%frame_skip)==0)
+	glutPostWindowRedisplay(win);
+}
+
+
+static void GLPrint(char *fmt,...)
+{
+    char s[256];
+    va_list va;
+    char *p;
+
+    va_start(va,fmt);
+    vsprintf(s,fmt,va);
+
+    p=s;
+
+    /*
+    while(*p)
+    	glutBitmapCharacter(GLUT_BITMAP_8_BY_13,(int)*p++);
+    */
+}
+
+
+// END OF FILE //
-- 
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