public static void Go()
{
int screen_w = BitmapEcran.GetWidth(), screen_h = BitmapEcran.GetHeight();
V3 camera_position = new V3(screen_w / 2, -400, screen_h / 2);
/* Lights */
// Light sources
V3 key_light_dir = new V3(-1, 1, -1);
Couleur key_light_color = new Couleur(0.8f, 0.8f, 0.8f);
//Lights.add_light(key_light_dir, key_light_color);
V3 fill_light_dir = new V3(1, 1, -1);
Couleur fill_light_color = new Couleur(0.5f, 0.5f, 0.5f);
//Lights.add_light(fill_light_dir, fill_light_color);
V3 point_light_position = new V3(screen_w * 0.5f, Scene.max_y_position / 2, screen_h - 43);
Couleur point_light_color = new Couleur(1f, 1f, 1f);
Lights.add_light(point_light_position, point_light_color, true);
/* Objects */
// list of all objects appearing on screen
List <Object> objects_on_screen = new List <Object>();
Scene.Room(ref objects_on_screen);
Scene.Boxes(ref objects_on_screen);
Scene.Mirror(ref objects_on_screen);
Scene.Bed(ref objects_on_screen);
Scene.Ball(ref objects_on_screen);
Scene.Shelf(ref objects_on_screen);
// Creates and initialize Z_buffer/ray casting activate + determines the camera position
Elements.inicialize_Elements(camera_position, true, objects_on_screen);
// Plot all objects on the screen with the ray casting method
/*for (int i = 0; i < screen_w; i++)
* {
* for(int j = 0; j < screen_h; j++)
* {
* Elements.RayCasting(new V3(i, 0, j), objects_on_screen);
* }
* }*/
V3 ray_direction;
Couleur c;
for (int i = 0; i < screen_w; i++)
{
for (int j = 0; j < screen_h; j++)
{
ray_direction = new V3(i, 0, j) - Elements.camera_position;
ray_direction.Normalize();
c = Elements.RayTracer(Elements.camera_position, ray_direction, 0);
BitmapEcran.DrawPixel(i, j, c);
}
}
}
/* Prints the pixel of point P on the screen:
*
* receives the color of the pixel without the lights
* and the normal vector.
*
* if P is set outside of the screen bounds, doesn't print anything
*
* compare its position on the Z_Buffer
*
* draws the pixel with its final color (adding the lights effects)
*/
public int printPixel(V3 P, Couleur color)
{
int x, y, z;
x = (int)P.x;
y = (int)P.y;
z = (int)P.z;
if (x < 0 || x >= BitmapEcran.GetWidth() || z < 0 || z >= BitmapEcran.GetHeight())
{
return(-1);
}
if (Elements.raycasting) // using ray casting
{
BitmapEcran.DrawPixel(x, z, color);
}
else
{ //using Z-Buffer
if (y < Elements.Z_Buffer[x, z])
{
Elements.Z_Buffer[x, z] = y;
BitmapEcran.DrawPixel(x, z, color);
}
}
return(0);
}
//dessine tous les objets de la scène
public void DrawScene()
{
for (int x_ecran = 0; x_ecran <= BitmapEcran.GetWidth(); x_ecran++)
{
for (int y_ecran = 0; y_ecran <= BitmapEcran.GetHeight(); y_ecran++)
{
V3 PosPixScene = new V3(x_ecran, 0, y_ecran);
V3 DirRayon = PosPixScene - PosCamera;
DirRayon.Normalize();
Couleur C = RayCast(PosCamera, DirRayon, Objets);
BitmapEcran.DrawPixel(x_ecran, y_ecran, C);
}
}
}
static public void inicialize_Elements(V3 camera_position, bool raycasting, List <Object> objects_on_screen)
{
Elements.raycasting = raycasting;
Elements.camera_position = camera_position;
Elements.objects_on_screen = objects_on_screen;
if (!raycasting)
{
int x_ecran = BitmapEcran.GetWidth();
int z_ecran = BitmapEcran.GetHeight();
Z_Buffer = new float[x_ecran, z_ecran];
//Initializer le Z_Buffer
for (int i = 0; i < x_ecran; i++)
{
for (int j = 0; j < z_ecran; j++)
{
Z_Buffer[i, j] = int.MaxValue;
}
}
}
}
public void DessineRaycast()
{
V3 camera = new V3((float)BitmapEcran.GetWidth() / 2, (float)BitmapEcran.GetWidth() * -1.5f, (float)BitmapEcran.GetHeight() / 2);
int xmax = BitmapEcran.GetWidth();
int ymax = BitmapEcran.GetHeight();
Couleur[,] colorbuffer = new Couleur[xmax, ymax];
for (int x_ecran = 0; x_ecran < BitmapEcran.GetWidth(); x_ecran++)
{
for (int y_ecran = 0; y_ecran < BitmapEcran.GetHeight(); y_ecran++)
{
V3 pixel = new V3((float)x_ecran, 0, (float)y_ecran);
V3 rayon = pixel - camera;
rayon.Normalize();
colorbuffer[x_ecran, y_ecran] = Raycast(camera, rayon);
BitmapEcran.DrawPixel(x_ecran, y_ecran, colorbuffer[x_ecran, y_ecran]);
}
}
}
public static void Start()
{
//création de la scène qui va contenir les objets
Scene mainScene = new Scene();
//couleurs
Couleur blanc = new Couleur(1, 1, 1);
Couleur rouge = new Couleur(0.9f, 0, 0);
Couleur jaune = new Couleur(1, 1, 0);
Couleur vert = new Couleur(0, 1, 0);
Couleur cyan = new Couleur(0, 1, 1);
Couleur bleu = new Couleur(0, 0, 1);
Couleur violet = new Couleur(1, 0, 1);
Couleur gris = new Couleur(0.5f, 0.5f, 0.5f);
Couleur noir = new Couleur(0, 0, 0);
//========== Lumières ==========
//lumière ambiante
//lumières directionnelles
V3 directionLumièreDirectionnelle;
V3 positionLumièrePoint;
LumiereDirectionnelle lumiereDirerectionnelle;
LumierePoint lumierePoint;
LumiereAmbiante LumAmb = new LumiereAmbiante(new Couleur(0.3f, 0.3f, 0.3f));
mainScene.SetLumAmb(LumAmb);
directionLumièreDirectionnelle = new V3(0, -1, 0);
lumiereDirerectionnelle = new LumiereDirectionnelle(new Couleur(0.5f, 0.5f, 0.5f), directionLumièreDirectionnelle);
//mainScene.AddLumDir(lumiereDirerectionnelle);
positionLumièrePoint = new V3(400, 1, 400);
lumierePoint = new LumierePoint(new Couleur(0.5f, 0.5f, 0.5f), positionLumièrePoint);
mainScene.AddLum(lumierePoint);
positionLumièrePoint = new V3(BitmapEcran.GetWidth() / 2, 0, BitmapEcran.GetHeight() / 2);
lumierePoint = new LumierePoint(new Couleur(0.5f, 0.5f, 0.5f), positionLumièrePoint);
mainScene.AddLum(lumierePoint);
//directionLumièreDirectionnelle = new V3(-1, -1, -1);
//lumiereDirerectionnelle = new LumiereDirectionnelle(new Couleur(0,0, 0.7f), directionLumièreDirectionnelle);
//mainScene.AddLumDir(lumiereDirerectionnelle);
//========== Matériaux ==========
Materiel Blanc = new Materiel(blanc / 1.2f, new Texture("bump38.jpg"), 50, 1);
Materiel test = new Materiel(new Texture("test.jpg"), new Texture("test.jpg"), 200, 3);
Materiel or = new Materiel(new Texture("gold.jpg"), new Texture("gold_Bump.jpg"), 200, 0.7f);
Materiel plomb = new Materiel(new Texture("lead.jpg"), new Texture("lead_bump.jpg"), 50, 1);
Materiel brique = new Materiel(new Texture("brickwork-texture.jpg"), new Texture("brickwork-bump-map.jpg"), 500, 1);
Materiel rock = new Materiel(new Texture("rock.jpg"), new Texture("rock.jpg"), 500, 1);
Materiel stone = new Materiel(new Texture("rock.jpg"), new Texture("rock.jpg"), 500, 1);
Materiel fibre = new Materiel(new Texture("rock.jpg"), new Texture("rock.jpg"), 500, 1);
Materiel Blob = new Materiel(blanc / 1.2f, new Texture("bump.jpg"), 50, 1);
//========== Objets ==========
V3 center;
Sphere s;
Rectangle r;
//Boule Or
center = new V3(600, 300f, 200);
s = new Sphere(center, 50, or);
mainScene.AddObjet3D(s);
//Boule Or
center = new V3(200, 200, 100);
s = new Sphere(center, 150, Blob);
mainScene.AddObjet3D(s);
//Boule Plomb
center = new V3(800, 1000, 400);
s = new Sphere(center, 100, plomb);
mainScene.AddObjet3D(s);
//Boule Brique
center = new V3(300, 1000, 400);
s = new Sphere(center, 150, Blanc);
mainScene.AddObjet3D(s);
//Rectangle brique Gauche
V3 A = new V3(0, 0, 0);
V3 B = new V3(0, 2000, 0);
V3 C = new V3(0, 0, 800);
r = new Rectangle(A, B, C, brique);
mainScene.AddObjet3D(r);
//Rectangle brique Droit
A = new V3(1000, 2000, 0);
B = new V3(1000, 0, 0);
C = new V3(1000, 2000, 800);
r = new Rectangle(A, B, C, brique);
mainScene.AddObjet3D(r);
//Rectangle brique Fond
A = new V3(0, 2000, 0);
B = new V3(1000, 2000, 0);
C = new V3(0, 2000, 800);
r = new Rectangle(A, B, C, brique);
mainScene.AddObjet3D(r);
//Rectangle brique Bas
A = new V3(0, 0, 0);
B = new V3(1000, 0, 0);
C = new V3(0, 2000, 0);
r = new Rectangle(A, B, C, brique);
mainScene.AddObjet3D(r);
A = new V3(400, 0, 0);
B = new V3(190, -50, 0);
C = new V3(0, 0, 190);
r = new Rectangle(A, B, C, brique);
//mainScene.AddObjet3D(r);
//Affichage de la scène
mainScene.DrawScene();
}
//récupère la couleur du pixel en prenant compte des lumières de la scène
public Couleur CouleurEclairee(V3 position, V3 normal, Couleur couleurDeBase, Materiel mat, Objet3D ObjetToDraw)
{
//initialisation de la couleur
Couleur couleurFinale = new Couleur(0, 0, 0);
//---------------------------Lumiere AMBIANTE----------------------------------//
if (LumAmb != null)
{
couleurFinale += new Couleur(couleurDeBase * LumAmb.Couleur);
}
if (Lumieres.Count > 0)
{
foreach (Lumiere l in Lumieres)
{
V3 DirectionLumiere = l.getDirection(position);
DirectionLumiere.Normalize();
if (!CheckIfObjectBetweenLightSource(DirectionLumiere, position, ObjetToDraw))
{
//Console.WriteLine("Je dessine la lumière");
//-------------------------------Lumiere DIFFUSE------------------------------------//
float diff = Math.Max((DirectionLumiere * normal), 0);
couleurFinale += new Couleur((couleurDeBase * l.getCouleur()) * diff);
//--------------------------------Reflet SPECULAIRE--------------------------------//
float forceSeculaire = mat.GetForceSpeculaire();
V3 positionOeil = new V3(BitmapEcran.GetHeight() / 2, -3000, BitmapEcran.GetWidth() / 2);
V3 directionDuRayonReflechis = new V3(2 * normal - DirectionLumiere);
directionDuRayonReflechis.Normalize();
V3 directionObservateur = new V3(positionOeil - position);
directionObservateur.Normalize();
couleurFinale += new Couleur(l.getCouleur() * (float)Math.Pow((directionDuRayonReflechis * directionObservateur), forceSeculaire));
}
}
}
return(couleurFinale);
}