/// <summary>
/// apply filter to given heightmap
/// </summary>
public void FilterMapInRegion(GlobalCoordinates map, Area region, float epsilon)
{
int x_min = region.botLeft.x;
int z_min = region.botLeft.z;
int x_max = region.topRight.x;
int z_max = region.topRight.z;
int area = 1;
GlobalCoordinates mapTmp = new GlobalCoordinates(100);
for (int x = x_min; x < x_max; x++)
{
for (int z = z_min; z < z_max; z++)
{
if (map.IsDefined(x, z))
{
float average = 0;
int neighboursCount = 0;
for (int _x = x - area; _x <= x + area; _x++)
{
for (int _z = z - area; _z <= z + area; _z++)
{
if (map.IsDefined(_x, _z))
{
average += map.GetValue(_x, _z, 0);
neighboursCount++;
}
}
}
if (neighboursCount != 0)
average /= neighboursCount;
else
average = 666;
if (average != 666)
{
float height = map.GetValue(x, z);
if (height < average - epsilon)
fg.SetGlobalValue(x, z, (average + epsilon), true, mapTmp);
else if (height > average + epsilon)
fg.SetGlobalValue(x, z, (average - epsilon), true, mapTmp);
}
}
}
}
for (int x = x_min; x < x_max; x++)
{
for (int z = z_min; z < z_max; z++)
{
if(mapTmp.IsDefined(x, z))
map.SetValue(x, z, mapTmp.GetValue(x, z));
}
}
}
/// <summary>
/// returns filter value on given global coordiantes (0 if not defined)
/// gc = global filter space
/// </summary>
public float GetGlobalValue(int x, int z, GlobalCoordinates gc)
{
float value = gc.GetValue(x, z);
if (value != 666)
return value;
else
return 0;
}
/// <summary>
/// maps given local coordinates to global
/// returns value on given coordinates
/// 666 if not defined
/// </summary>
public float GetLocalValue(int x, int z, GlobalCoordinates gc)
{
//Debug.Log("getting " + x + "," + z);
//Debug.Log("= " + (x + (int)center.x - terrainWidth) + "," + (z + (int)center.z - terrainHeight / 2));
return gc.GetValue(x + (int)center.x - terrainWidth / 2, z + (int)center.z - terrainHeight / 2);
}