vokselijuttu lisätty

src/voxel.h

@@ -0,0 +1,224 @@
+#ifndef VOXEL_HEADER
+#define VOXEL_HEADER
+
+#include "common_irrlicht.h"
+#include "mapblock.h"
+#include <iostream>
+
+/*
+	TODO: A fast voxel manipulator class
+
+	Not thread-safe.
+*/
+
+/*
+	This class resembles aabbox3d<s16> a lot, but has inclusive
+	edges for saner handling of integer sizes
+*/
+class VoxelArea
+{
+public:
+	// Starts as zero sized
+	VoxelArea():
+		MinEdge(1,1,1),
+		MaxEdge(0,0,0)
+	{
+	}
+	VoxelArea(v3s16 min_edge, v3s16 max_edge):
+		MinEdge(min_edge),
+		MaxEdge(max_edge)
+	{
+	}
+	VoxelArea(v3s16 p):
+		MinEdge(p),
+		MaxEdge(p)
+	{
+	}
+	void addArea(VoxelArea &a)
+	{
+		if(a.MinEdge.X < MinEdge.X) MinEdge.X = a.MinEdge.X;
+		if(a.MinEdge.Y < MinEdge.Y) MinEdge.Y = a.MinEdge.Y;
+		if(a.MinEdge.Z < MinEdge.Z) MinEdge.Z = a.MinEdge.Z;
+		if(a.MaxEdge.X > MaxEdge.X) MaxEdge.X = a.MaxEdge.X;
+		if(a.MaxEdge.Y > MaxEdge.Y) MaxEdge.Y = a.MaxEdge.Y;
+		if(a.MaxEdge.Z > MaxEdge.Z) MaxEdge.Z = a.MaxEdge.Z;
+	}
+	void addPoint(v3s16 p)
+	{
+		if(p.X < MinEdge.X) MinEdge.X = p.X;
+		if(p.Y < MinEdge.Y) MinEdge.Y = p.Y;
+		if(p.Z < MinEdge.Z) MinEdge.Z = p.Z;
+		if(p.X > MaxEdge.X) MaxEdge.X = p.X;
+		if(p.Y > MaxEdge.Y) MaxEdge.Y = p.Y;
+		if(p.Z > MaxEdge.Z) MaxEdge.Z = p.Z;
+	}
+	v3s16 getExtent()
+	{
+		return MaxEdge - MinEdge + v3s16(1,1,1);
+	}
+	s32 getVolume()
+	{
+		v3s16 e = getExtent();
+		return (s32)e.X * (s32)e.Y * (s32)e.Z;
+	}
+	bool isInside(v3s16 p)
+	{
+		return(
+			p.X >= MinEdge.X && p.X <= MaxEdge.X &&
+			p.Y >= MinEdge.Y && p.Y <= MaxEdge.Y &&
+			p.Z >= MinEdge.Z && p.Z <= MaxEdge.Z
+		);
+	}
+	bool operator==(const VoxelArea &other)
+	{
+		return (MinEdge == other.MinEdge
+				&& MaxEdge == other.MaxEdge);
+	}
+	
+	/*
+		Translates position from virtual coordinates to array index
+	*/
+	s32 index(s16 x, s16 y, s16 z)
+	{
+		v3s16 em = getExtent();
+		v3s16 off = MinEdge;
+		s32 i = (s32)(z-off.Z)*em.Y*em.X + (y-off.Y)*em.X + (x-off.X);
+		//dstream<<" i("<<x<<","<<y<<","<<z<<")="<<i<<" ";
+		return i;
+	}
+	s32 index(v3s16 p)
+	{
+		return index(p.X, p.Y, p.Z);
+	}
+
+	void print(std::ostream &o)
+	{
+		o<<"("<<MinEdge.X
+		 <<","<<MinEdge.Y
+		 <<","<<MinEdge.Z
+		 <<")("<<MaxEdge.X
+		 <<","<<MaxEdge.Y
+		 <<","<<MaxEdge.Z
+		 <<")";
+	}
+
+	// Edges are inclusive
+	v3s16 MinEdge;
+	v3s16 MaxEdge;
+};
+
+class VoxelManipulator : public NodeContainer
+{
+public:
+	VoxelManipulator();
+	~VoxelManipulator();
+	
+	/*
+		Virtuals from NodeContainer
+	*/
+	virtual u16 nodeContainerId() const
+	{
+		return NODECONTAINER_ID_VOXELMANIPULATOR;
+	}
+	bool isValidPosition(v3s16 p)
+	{
+		return m_area.isInside(p);
+	}
+	// These are a bit slow and shouldn't be used internally
+	MapNode getNode(v3s16 p)
+	{
+		if(isValidPosition(p) == false)
+			emerge(VoxelArea(p));
+
+		MapNode &n = m_data[m_area.index(p)];
+
+		//TODO: Is this the right behaviour?
+		if(n.d == MATERIAL_IGNORE)
+			throw InvalidPositionException
+			("Not returning MATERIAL_IGNORE in VoxelManipulator");
+
+		return n;
+	}
+	void setNode(v3s16 p, MapNode & n)
+	{
+		if(isValidPosition(p) == false)
+			emerge(VoxelArea(p));
+		m_data[m_area.index(p)] = n;
+	}
+	
+	MapNode & operator[](v3s16 p)
+	{
+		//dstream<<"operator[] p=("<<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;
+		if(isValidPosition(p) == false)
+			emerge(VoxelArea(p));
+		return m_data[m_area.index(p)];
+	}
+
+	/*
+		Manipulation of bigger chunks
+	*/
+	
+	void print(std::ostream &o);
+	
+	void addArea(VoxelArea area);
+
+	void interpolate(VoxelArea area);
+
+	/*void blitFromNodeContainer
+			(v3s16 p_from, v3s16 p_to, v3s16 size, NodeContainer *c);
+	
+	void blitToNodeContainer
+			(v3s16 p_from, v3s16 p_to, v3s16 size, NodeContainer *c);*/
+
+	/*
+		Virtual functions
+	*/
+	
+	/*
+		Get the contents of the requested area from somewhere.
+
+		If not found from source, add as MATERIAL_IGNORE.
+	*/
+	virtual void emerge(VoxelArea a)
+	{
+		//dstream<<"emerge p=("<<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;
+		addArea(a);
+	}
+
+	/*
+		Member variables
+	*/
+
+	/*
+		The area that is stored in m_data.
+		addInternalBox should not be used if getExtent() == v3s16(0,0,0)
+		MaxEdge is 1 higher than maximum allowed position
+	*/
+	VoxelArea m_area;
+	/*
+		NULL if data size is 0
+		Data is stored as [z*h*w + y*h + x]
+		Special data values:
+			MATERIAL_IGNORE: Unspecified node
+	*/
+	MapNode *m_data;
+private:
+};
+
+class Map;
+
+class MapVoxelManipulator : public VoxelManipulator
+{
+public:
+	MapVoxelManipulator(Map *map);
+
+	virtual void emerge(VoxelArea a);
+
+	void blitBack(core::map<v3s16, MapBlock*> & modified_blocks);
+
+private:
+	Map *m_map;
+};
+
+#endif
+