public void Grid(float tileSize, byte maxValue, GridObject<byte> paint, GridObject<byte> canvas)
{
if (paint == null || canvas == null)
return;
float dx = Math.Abs(normal.X);
float dy = Math.Abs(normal.Y);
int x = (int)(point.X / tileSize);
int y = (int)(point.Y / tileSize);
float error = dx - dy;
int x_inc = (normal.X > 0) ? 1 : -1;
int y_inc = (normal.Y > 0) ? 1 : -1;
dx *= 2;
dy *= 2;
float distance = 0;
byte value = 0;
while(true)
{
value = Math.Max(value, paint.Get(x, y, maxValue));
canvas.Set(x, y, value);
if (value >= maxValue)
{
return;
}
if (error > 0)
{
x += x_inc;
error -= dy;
distance += dy * tileSize;
}
else
{
y += y_inc;
error += dx;
distance += dx * tileSize;
}
}
}
public byte[,] CanSee(int x, int y, byte height)
{
if (_sightMap == null || _width != _sightMap.GetLength(0) || _height != _sightMap.GetLength(1))
_sightMap = new byte[_width, _height][][,];
Vector2 v = new Vector2(x + 0.5f, y + 0.5f);
if (_sightMap[x, y] == null)
{
_sightMap[x, y] = new byte[MAX_HEIGHT + 1][,];
}
if (_sightMap[x, y][height] == null)
{
var tmpSight = new GridObject<byte>(_width, _height, height);
for (int i = 0; i < _width; i++)
{
for (int j = 0; j < _height; j++)
{
var tmp = Math.Min(Math.Min(
Raytrace(1, v, new Vector2(i + 0.3f, j + 0.3f)),
Raytrace(1, v, new Vector2(i + 0.7f, j + 0.3f))),
Math.Min(
Raytrace(1, v, new Vector2(i + 0.3f, j + 0.7f)),
Raytrace(1, v, new Vector2(i + 0.7f, j + 0.7f))));
tmpSight.Set(i, j, tmp);
}
}
_sightMap[x, y][height] = tmpSight.GetGrid();
}
return _sightMap[x, y][height];
}