/// <summary>
/// Adds or removes terrain at its surface.
/// </summary>
public void ModifyTerrain(Vector3 point, bool add)
{
for (float x = -TerrainRadius; x <= TerrainRadius; x = x + WorldGridInfo.kVoxelSize)
{
for (float z = -TerrainRadius; z <= TerrainRadius; z = z + WorldGridInfo.kVoxelSize)
{
// start at the bottom of world if adding terrain or at the top otherwise
Vector3 worldPosition = new Vector3(point.x + x, add ? WorldGridInfo.kVoxelSize : _worldApi.GetHeight() - WorldGridInfo.kVoxelSize, point.z + z);
// traverse the column at XZ position up or down
while (worldPosition.y > 0 && worldPosition.y < _worldApi.GetHeight())
{
Voxel voxelCopy = _worldApi.TryGetVoxel(in worldPosition, out VectorI3 indices);
if (!voxelCopy.Valid)
{
break;
}
// if adding and found a not full voxel yet
// if removing and found a not empty voxel yet
if ((add && voxelCopy.Solid < Voxel.kMaxVolume) || (!add && voxelCopy.Solid > 0))
{
ModifyVoxel(ref voxelCopy, in indices, add, false);
break;
}
worldPosition.y += add ? WorldGridInfo.kVoxelSize : -WorldGridInfo.kVoxelSize;
}
}
}
}
public void Initialize(WorldApi worldApi)
{
// orbit around the center of generated world
Vector3 center = new Vector3(worldApi.GetWidth() * 0.5f, worldApi.GetHeight() * 0.5f, worldApi.GetDepth() * 0.5f);
transform.parent.Translate(center);
// zoom out from the world
_distance += worldApi.GetDepth() * 0.5f;
}