/// <summary>
/// Raises the north-eastern corner of the specified voxel
/// </summary>
/// <returns>false if the operation was unsuccessful.</returns>
private bool raise(Location loc)
{
WorldDefinition w = WorldDefinition.World;
// make sure that four surrounding voxels can be raised,
// and the ground levels of them are the same
if (!canBeRaised(loc))
{
return(false);
}
// then actually change the terrain
for (int x = 0; x <= 1; x++)
{
for (int y = -1; y <= 0; y++)
{
Location l = new Location(loc.x + x, loc.y + y, loc.z);
Voxel vx = w[l];
if (vx is WorldDefinition.OutOfWorldVoxel)
{
continue; // this is beyond the border
}
MountainVoxel v = vx as MountainVoxel;
Direction d = Direction.get(1 - x * 2, -y * 2 - 1); // corner to modify
if (v == null)
{
v = new MountainVoxel(l, 0, 0, 0, 0);
}
// raise the corner
v.setHeight(d, v.getHeight(d) + 1);
if (v.isSaturated)
{
// if the voxel is saturated, raise the ground level
w.raiseGround(l);
w.remove(l); // remove this voxel
}
}
}
return(true);
}