// ForEachChunkProvider.h

// Declares the cForEachChunkProvider class which acts as an interface for classes that provide a ForEachChunkInRect()
// function Primarily serves as a decoupling between cBlockArea and cWorld





#pragma once




// fwd:
class cChunkDataCallback;
class cBlockArea;





class cForEachChunkProvider
{
  public:
	virtual ~cForEachChunkProvider() {}

	/** Calls the callback for each chunk in the specified range. */
	virtual bool ForEachChunkInRect(
		int a_MinChunkX,
		int a_MaxChunkX,
		int a_MinChunkZ,
		int a_MaxChunkZ,
		cChunkDataCallback & a_Callback
	) = 0;

	/** Writes the block area into the specified coords.
	Returns true if all chunks have been processed.
	a_DataTypes is a bitmask of cBlockArea::baXXX constants ORed together.
	*/
	virtual bool WriteBlockArea(
		cBlockArea & a_Area,
		int a_MinBlockX,
		int a_MinBlockY,
		int a_MinBlockZ,
		int a_DataTypes
	) = 0;
};