private void CastLight(LightSource light, int x, int y, int radius, int row, float startSlope, float endSlope, int xx, int xy, int yx, int yy)
{
if (startSlope < endSlope)
return;
float nextStartSlope = startSlope;
for (int i = row; i < radius; ++i)
{
bool blocked = false;
for (int dx = -i, dy = -i; dx <= 0; ++dx)
{
float lSlope = (dx - 0.5f) / (dy + 0.5f);
float rSlope = (dx + 0.5f) / (dy - 0.5f);
if (startSlope < rSlope)
continue;
else if (endSlope > lSlope)
break;
int sax = dx * xx + dy * xy;
int say = dx * yx + dy * yy;
if ((sax < 0 && Math.Abs(sax) > x) || (say < 0 && Math.Abs(say) > y))
continue;
int ax = x + sax;
int ay = y + say;
if(ax >= Width || ay >= Height)
continue;
int rad2 = radius * radius;
//we lit the cell
if ((dx * dx + dy * dy) < rad2 && (Math.Abs(ax-x) + Math.Abs(ay-y) <= radius/1.1))
{
int squaredDist = (x - ax) * (x - ax) + (y - ay) * (y - ay);
double intensityCoef1 = 1.0 / (1.0 + squaredDist/LightingMap.LightScaleDropoff);
double intensityCoef2 = intensityCoef1 - 1.0 / (1.0 + radius * radius);
double intensityCoef3 = intensityCoef2 / (1.0 - 1.0 / (1.0 + radius * radius));
LightCell(ax, ay, (byte)Math.Max((intensityCoef3 * light.Intensity/LightingMap.IntensityScaleFactor), GetLightLevel(ax, ay)));
}
if (blocked)
{
if (cells[ax, ay].IsObscuring)
{
nextStartSlope = rSlope;
continue;
}
else
{
blocked = false;
startSlope = nextStartSlope;
}
}
else if (cells[ax, ay].IsObscuring)
{
blocked = true;
nextStartSlope = rSlope;
CastLight(light, x, y, radius, i + 1, startSlope, lSlope, xx, xy, yx, yy);
}
}
if (blocked)
break;
}
}
public void AddLightSource(LightSource l)
{
l.Intensity = 80;
lightSources.Add(l);
}
public void AddLightSource(LightSource Lantern)
{
lightingMap.AddLightSource(Lantern);
}
