Bitmap create_map(Bitmap map, int z = 600)
{
for (int i = 0; i < map.Width; i++)
{
for (int j = 0; j < map.Height; j++)
{
ray r = new ray(Scene.camera, new Vector(i, j, z));
r.init_color(3000);
map.SetPixel(i, j, r.get_col());
}
}
return(map);
}
public void init_color(double max_dist)
{
double min_dist = max_dist;
obj o = null;
intersection? intersec = null;
int x;
if (dir.X == 250 && dir.Y == 250)
x = 1;
foreach (obj figure in Scene.list_obj)
{
intersection? intersec0 = figure.is_cross(this);
if (intersec0 != null && intersec0.Value.dist < min_dist)
{
min_dist = intersec0.Value.dist;
intersec = intersec0;
//this_col = figure.color_obj;
o = figure;
}
}
if (min_dist < max_dist)
{
ray second_ray = new ray(intersec.Value.point, Scene.light);
//MessageBox.Show(intersec.Value.point.Z + "");
bool is_light = true;
intersec = new intersection();
foreach (obj figure in Scene.list_obj)
{
if (!(figure is wall))
{
intersec = figure.is_cross(second_ray);
if (intersec != null)
{
is_light = false;
break;
}
}
}
if (is_light) this_col = o.color_obj;
}
}
public override intersection?is_cross(ray r)
{
var v1 = point - r.begin;
var v2 = (r.dir - r.begin).Normalized();
var temp = v2 * norm;
if (temp >= 0)
{
return(null);
}
var t = (point - r.begin) * norm / temp;
return(new intersection(r.begin + (v2.Normalized() * t), t));
/*if (v2 * norm - Epsilon >= 0)
* return null;
*
* var angle = Vector.AngleBet(v1, v2);
* var angle2 = Vector.AngleBet(v2, norm);
*
* float dist1 = (float)Vector.Dist(r.begin, point);
* float dist2 = (float)Math.Sin(angle) * dist1;
*
* float dist3 = (float)(dist2 / (Math.Sin(angle2)));
*
* float dist4 = (float)(dist3 * (Math.Tan(angle2)));
*
* float dist5 = (float)Math.Sqrt(dist4 * dist4 - dist2 * dist2);
*
* float dist01 = (float)(dist1 * dist1);
* float dist02 = (float)(dist2 * dist2);
* float dist03 = (float)(dist01 - dist02);
*
* float dist6 = (float)Math.Sqrt(dist1 * dist1 - dist2 * dist2);
*
* float dist = dist5 + dist6;
* if (dist < 1) return null;
* return new intersection(r.begin + (v2.Normalized() * dist), dist);*/
}
public override intersection?is_cross(ray r)
{
var v1 = r.begin - center;
var v2 = r.begin - r.dir;
var angle = Vector.AngleBet(v1, v2);
var dist2 = Vector.Dist(r.begin, center);
var dist1 = Math.Abs(Math.Sin(angle) * dist2);
bool b = angle > Math.PI / 2;
if (angle > Math.PI / 2 || dist1 > radius)
{
return(null);
}
var dist3 = Math.Abs(Math.Cos(angle) * dist2);
var dist4 = dist3 - Math.Sqrt(radius * radius - dist1 * dist1);
var v_cross = r.begin - v2.Normalized() * dist4;
return(new intersection(v_cross, dist4));
}
abstract public intersection?is_cross(ray r);