/*
 *  Ray++ - Object-oriented ray tracing library
 *  Copyright (C) 1998-2001 Martin Reinecke and others.
 *  See the AUTHORS file for more information.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  See the README file for more information.
 */

/*
               Ray++ demo program
This is a simple scene containing a white sphere and coloured lightsources.
The image is written to a Targa file
*/

// first, include all the headers of the classes we need

#include "kernel/globals.h"
#include "kernel/handle.h"
#include "worlds/scene.h"
#include "renderers/raytracer.h"
#include "outputs/tga_output.h"
#include "shapes/sphere.h"
#include "surfaces/matte.h"
#include "objects/simple_object.h"
#include "lights/pointlight.h"
#include "cameras/std_camera.h"


int main ()
  {
  using namespace RAYPP;

// define an output handle
  HANDLE<OUTPUT> Output;

// create an output object. This one produces a 640x480 Targafile
// with the name "first.tga"
  Output = Cnew TGA_OUTPUT (640, 480, "first.tga");
  Output->Init();

// create a raytracer object. This is a child of the class RENDERER
  RAYTRACER *Raytracer = Cnew RAYTRACER;

// create a scene object. This is a child of the class WORLD
  SCENE *Scn = Cnew SCENE;

// create a camera, which sits at <0,0.75,-3.75> and looks at <0,0,0>.
// By default, the sky vector is <0,1,0> and the field of view is
// 45x34 degrees.
// When created, add the camera to the scene.
  Raytracer->Add (Cnew STD_CAMERA (VECTOR (0,0.75,-3.75), VECTOR (0,0,0)));

  SIMPLE_OBJECT *obj;
  uint4 Priority = 1;

// create an object to put into the scene
  obj = Cnew SIMPLE_OBJECT;
// tell the object that its shape is a sphere (center at <0,0,0>, radius is 1)
  obj->Set_Shape (Cnew SPHERE);
// tell the object that its surface is a matte surface with Ka=0.2, Kd=1.0
// and a colour of <1,1,1> (white)
  obj->Set_Surface (Cnew MATTE (0.2, 1.0, COLOUR(1,1,1)));
// set the object's priority. You don't need to worry about that now.
  obj->Set_Priority (Priority);
// Add the object to the scene
  Scn->Add (obj);

// add some lightsources to the scene
// the first lightsource sits at <10,30,-20> and has a colour of <800,0,0>.
// the large values for the colour are needed because the light intensity
// drops with the square of the distance.
  Scn->Add (Cnew POINTLIGHT (VECTOR (10,30,-20), COLOUR (800,0,0)));
  Scn->Add (Cnew POINTLIGHT (VECTOR (0,30,0), COLOUR (0,800,0)));
  Scn->Add (Cnew POINTLIGHT (VECTOR (-10,-20,-40), COLOUR (0,0,800)));

// initialize the world handle with our new scene
  World = Scn;
// initialize the world; this also initializes all subobjects
// (that means everything we added to the scene)
  World->Init();

  Renderer = Raytracer;
  Renderer->Init();

// tell the output to make an image
  Output->Render();

// no need to deallocate anything, the destructors take care of all
// dynamically allocated memory.
  }