public static BasicMap Rotate(this BasicMap m, Coord origin, int radius, int degrees)
{
BasicMap rotated = new BasicMap(m.Width, m.Height, 1, Distance.EUCLIDEAN);
//only rotating the bottom right corner, and not even rotating it correctly
if (degrees % 90 == 0)
{
//this rotates more than just the circle - bug, deal with it later
rotated.Add(m.RotateDiscreet(degrees));
}
else
{
BasicMap map = m.RotateDiscreet(360);
while (degrees > 45)
{
degrees -= 90;
//rotates more than just this circle - bug - deal with it later
map = m.RotateDiscreet(90);
}
while (degrees <= -45)
{
degrees += 90;
//rotates more than just the circle - bug, fix later
map = m.RotateDiscreet(270);
}
double radians = Calculate.DegreesToRadians(degrees);
for (int x = -radius; x < radius; x++)
{
for (int y = -radius; y < radius; y++)
{
if (radius > Math.Sqrt(x * x + y * y))
{
int xPrime = (int)(x * Math.Cos(radians) - y * Math.Sin(radians));
int yPrime = (int)(x * Math.Sin(radians) + y * Math.Cos(radians));
Coord source = new Coord(x, y) + origin;
Coord target = new Coord(xPrime, yPrime) + origin;
BasicTerrain terrain = map.GetTerrain <BasicTerrain>(source);
if (terrain != null && rotated.Contains(target))
{
rotated.SetTerrain(_factory.Copy(terrain, target));
}
}
}
}
}
return(rotated);
}
public void RotateDiscreetTest()
{
BasicMap rotated = _map.RotateDiscreet(90);
//Top left corner becomes top right corner
Coord a = new Coord(0, 0);
Coord b = new Coord(_map.Width - 1, 0);
BasicTerrain t1 = rotated.GetTerrain <BasicTerrain>(a);
BasicTerrain t2 = _map.GetTerrain <BasicTerrain>(b);
Assert.AreEqual(t1.Glyph, t2.Glyph, "Top left corner wasn't moved to the top right corner.");
//top right corner becomes bottom right corner
a = b;
b = new Coord(_map.Width - 1, _map.Height - 1);
t1 = rotated.GetTerrain <BasicTerrain>(a);
t2 = _map.GetTerrain <BasicTerrain>(b);
Assert.AreEqual(t1.Glyph, t2.Glyph, "Top right quadrant didn't move to the bottom right quadrant.");
//bottom right corner become bottom left corner
a = b;
b = new Coord(0, _map.Height - 1);
t1 = rotated.GetTerrain <BasicTerrain>(a);
t2 = _map.GetTerrain <BasicTerrain>(b);
Assert.AreEqual(t1.Glyph, t2.Glyph, "Bottom right Quadrant didn't move to the bottom left.");
//bottom left corner becomes top left corner
a = b;
b = new Coord(0, 0);
t1 = rotated.GetTerrain <BasicTerrain>(a);
t2 = _map.GetTerrain <BasicTerrain>(b);
Assert.AreEqual(t1.Glyph, t2.Glyph, "Bottom left quadrant didn't move to the top left.");
}