/* 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);
}
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);
}
}
}
public void Draw(double x, double y, Couleur couleur)
{
int x_sceem = (int)((x / (20.0 * this.ration)) * this.resolution_X + this.resolution_X / 2);
int y_screem = (int)((y / 20.0) * this.resolution_Y + this.resolution_Y / 2);
//Console.WriteLine("x:"+x_sceem+" y:"+y_screem);
BitmapEcran.DrawPixel(x_sceem, y_screem, couleur);
}
//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);
}
}
}
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]);
}
}
}