X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fvoxel.cpp;h=bb270f53b585cfd04375f834373cd108ecb70a5c;hb=5c248c2d7de3db54e85f7c388743a2eb8e36fee4;hp=98c9817c5c9e9954ace62c841a429ac239871157;hpb=af95cfc7a15788386d055a5b4a7377673d36b8bf;p=minetest.git

diff --git a/src/voxel.cpp b/src/voxel.cpp
index 98c9817c5..bb270f53b 100644
--- a/src/voxel.cpp
+++ b/src/voxel.cpp
@@ -1,37 +1,157 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
 #include "voxel.h"
 #include "map.h"
+#include "gettime.h"
+#include "nodedef.h"
+#include "util/directiontables.h"
+#include "util/timetaker.h"
+#include <cstring>  // memcpy, memset
+
+/*
+	Debug stuff
+*/
+u64 addarea_time = 0;
+u64 emerge_time = 0;
+u64 emerge_load_time = 0;
+u64 clearflag_time = 0;
 
-VoxelManipulator::VoxelManipulator():
-	m_data(NULL)
+VoxelManipulator::~VoxelManipulator()
 {
+	clear();
 }
 
-VoxelManipulator::~VoxelManipulator()
+void VoxelManipulator::clear()
 {
-	if(m_data)
-		delete[] m_data;
+	// Reset area to volume=0
+	m_area = VoxelArea();
+	delete[] m_data;
+	m_data = nullptr;
+	delete[] m_flags;
+	m_flags = nullptr;
+}
+
+void VoxelManipulator::print(std::ostream &o, const NodeDefManager *ndef,
+	VoxelPrintMode mode)
+{
+	const v3s16 &em = m_area.getExtent();
+	v3s16 of = m_area.MinEdge;
+	o<<"size: "<<em.X<<"x"<<em.Y<<"x"<<em.Z
+	 <<" offset: ("<<of.X<<","<<of.Y<<","<<of.Z<<")"<<std::endl;
+
+	for(s32 y=m_area.MaxEdge.Y; y>=m_area.MinEdge.Y; y--)
+	{
+		if(em.X >= 3 && em.Y >= 3)
+		{
+			if     (y==m_area.MinEdge.Y+2) o<<"^     ";
+			else if(y==m_area.MinEdge.Y+1) o<<"|     ";
+			else if(y==m_area.MinEdge.Y+0) o<<"y x-> ";
+			else                           o<<"      ";
+		}
+
+		for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
+		{
+			for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
+			{
+				u8 f = m_flags[m_area.index(x,y,z)];
+				char c;
+				if(f & VOXELFLAG_NO_DATA)
+					c = 'N';
+				else
+				{
+					c = 'X';
+					MapNode n = m_data[m_area.index(x,y,z)];
+					content_t m = n.getContent();
+					u8 pr = n.param2;
+					if(mode == VOXELPRINT_MATERIAL)
+					{
+						if(m <= 9)
+							c = m + '0';
+					}
+					else if(mode == VOXELPRINT_WATERPRESSURE)
+					{
+						if(ndef->get(m).isLiquid())
+						{
+							c = 'w';
+							if(pr <= 9)
+								c = pr + '0';
+						}
+						else if(m == CONTENT_AIR)
+						{
+							c = ' ';
+						}
+						else
+						{
+							c = '#';
+						}
+					}
+					else if(mode == VOXELPRINT_LIGHT_DAY)
+					{
+						if(ndef->get(m).light_source != 0)
+							c = 'S';
+						else if(!ndef->get(m).light_propagates)
+							c = 'X';
+						else
+						{
+							u8 light = n.getLight(LIGHTBANK_DAY, ndef->getLightingFlags(n));
+							if(light < 10)
+								c = '0' + light;
+							else
+								c = 'a' + (light-10);
+						}
+					}
+				}
+				o<<c;
+			}
+			o<<' ';
+		}
+		o<<std::endl;
+	}
 }
 
-void VoxelManipulator::addArea(VoxelArea area)
+void VoxelManipulator::addArea(const VoxelArea &area)
 {
-	if(area.getExtent() == v3s16(0,0,0))
+	// Cancel if requested area has zero volume
+	if (area.hasEmptyExtent())
+		return;
+
+	// Cancel if m_area already contains the requested area
+	if(m_area.contains(area))
 		return;
-	
+
+	TimeTaker timer("addArea", &addarea_time);
+
 	// Calculate new area
 	VoxelArea new_area;
-	if(m_area.getExtent() == v3s16(0,0,0))
+	// New area is the requested area if m_area has zero volume
+	if(m_area.hasEmptyExtent())
 	{
 		new_area = area;
 	}
+	// Else add requested area to m_area
 	else
 	{
 		new_area = m_area;
 		new_area.addArea(area);
 	}
 
-	if(new_area == m_area)
-		return;
-
 	s32 new_size = new_area.getVolume();
 
 	/*dstream<<"adding area ";
@@ -43,262 +163,158 @@ void VoxelManipulator::addArea(VoxelArea area)
 	dstream<<", new_size="<<new_size;
 	dstream<<std::endl;*/
 
-	// Allocate and clear new data
-	MapNode *new_data;
-	new_data = new MapNode[new_size];
-	for(s32 i=0; i<new_size; i++)
-	{
-		new_data[i].d = MATERIAL_IGNORE;
-	}
-	
+	// Allocate new data and clear flags
+	MapNode *new_data = new MapNode[new_size];
+	assert(new_data);
+	u8 *new_flags = new u8[new_size];
+	assert(new_flags);
+	memset(new_flags, VOXELFLAG_NO_DATA, new_size);
+
 	// Copy old data
-	
+	s32 old_x_width = m_area.MaxEdge.X - m_area.MinEdge.X + 1;
 	for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
 	for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
-	for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
 	{
-		new_data[new_area.index(z,y,x)] = m_data[m_area.index(x,y,z)];
-	}
+		unsigned int old_index = m_area.index(m_area.MinEdge.X,y,z);
+		unsigned int new_index = new_area.index(m_area.MinEdge.X,y,z);
 
-	// Replace member
-	m_area = new_area;
-	MapNode *old_data = m_data;
-	m_data = new_data;
-	delete[] old_data;
-}
-
-void VoxelManipulator::print(std::ostream &o)
-{
-	v3s16 em = m_area.getExtent();
-	v3s16 of = m_area.MinEdge;
-	o<<"size: "<<em.X<<"x"<<em.Y<<"x"<<em.Z
-	 <<" offset: ("<<of.X<<","<<of.Y<<","<<of.Z<<")"<<std::endl;
-	
-	for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
-	{
-		if(em.X >= 3 && em.Y >= 3)
-		{
-			if(y==m_area.MinEdge.Y+0) o<<"y x-> ";
-			if(y==m_area.MinEdge.Y+1) o<<"|     ";
-			if(y==m_area.MinEdge.Y+2) o<<"V     ";
-		}
-
-		for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
-		{
-			for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
-			{
-				u8 m = m_data[m_area.index(x,y,z)].d;
-				char c = 'X';
-				if(m == MATERIAL_IGNORE)
-					c = 'I';
-				else if(m <= 9)
-					c = m + '0';
-				o<<c;
-			}
-			o<<' ';
-		}
-		o<<std::endl;
+		memcpy(&new_data[new_index], &m_data[old_index],
+				old_x_width * sizeof(MapNode));
+		memcpy(&new_flags[new_index], &m_flags[old_index],
+				old_x_width * sizeof(u8));
 	}
-}
-
-void VoxelManipulator::interpolate(VoxelArea area)
-{
-	VoxelArea emerge_area = area;
-	emerge_area.MinEdge -= v3s16(1,1,1);
-	emerge_area.MaxEdge += v3s16(1,1,1);
-	emerge(emerge_area);
 
-	SharedBuffer<u8> buf(area.getVolume());
+	// Replace area, data and flags
 
-	for(s32 z=area.MinEdge.Z; z<=area.MaxEdge.Z; z++)
-	for(s32 y=area.MinEdge.Y; y<=area.MaxEdge.Y; y++)
-	for(s32 x=area.MinEdge.X; x<=area.MaxEdge.X; x++)
-	{
-		v3s16 p(x,y,z);
-
-		v3s16 dirs[] = {
-			v3s16(1,1,0),
-			v3s16(1,0,1),
-			v3s16(1,-1,0),
-			v3s16(1,0,-1),
-			v3s16(-1,1,0),
-			v3s16(-1,0,1),
-			v3s16(-1,-1,0),
-			v3s16(-1,0,-1),
-		};
-		//const v3s16 *dirs = g_26dirs;
-		
-		s16 total = 0;
-		s16 airness = 0;
-		u8 m = MATERIAL_IGNORE;
-
-		for(s16 i=0; i<8; i++)
-		//for(s16 i=0; i<26; i++)
-		{
-			v3s16 p2 = p + dirs[i];
+	m_area = new_area;
 
-			MapNode &n = m_data[m_area.index(p2)];
-			if(n.d == MATERIAL_IGNORE)
-				continue;
+	MapNode *old_data = m_data;
+	u8 *old_flags = m_flags;
 
-			airness += (n.d == MATERIAL_AIR) ? 1 : -1;
-			total++;
+	/*dstream<<"old_data="<<(int)old_data<<", new_data="<<(int)new_data
+	<<", old_flags="<<(int)m_flags<<", new_flags="<<(int)new_flags<<std::endl;*/
 
-			if(m == MATERIAL_IGNORE && n.d != MATERIAL_AIR)
-				m = n.d;
-		}
+	m_data = new_data;
+	m_flags = new_flags;
 
-		// 1 if air, 0 if not
-		buf[area.index(p)] = airness > -total/2 ? MATERIAL_AIR : m;
-		//buf[area.index(p)] = airness > -total ? MATERIAL_AIR : m;
-		//buf[area.index(p)] = airness >= -7 ? MATERIAL_AIR : m;
-	}
+	delete[] old_data;
+	delete[] old_flags;
 
-	for(s32 z=area.MinEdge.Z; z<=area.MaxEdge.Z; z++)
-	for(s32 y=area.MinEdge.Y; y<=area.MaxEdge.Y; y++)
-	for(s32 x=area.MinEdge.X; x<=area.MaxEdge.X; x++)
-	{
-		v3s16 p(x,y,z);
-		m_data[m_area.index(p)].d = buf[area.index(p)];
-	}
+	//dstream<<"addArea done"<<std::endl;
 }
 
-#if 0
-void VoxelManipulator::blitFromNodeContainer
-		(v3s16 p_from, v3s16 p_to, v3s16 size, NodeContainer *c)
+void VoxelManipulator::copyFrom(MapNode *src, const VoxelArea& src_area,
+		v3s16 from_pos, v3s16 to_pos, const v3s16 &size)
 {
-	VoxelArea a_to(p_to, p_to+size-v3s16(1,1,1));
-	addArea(a_to);
-	for(s16 z=0; z<size.Z; z++)
-	for(s16 y=0; y<size.Y; y++)
-	for(s16 x=0; x<size.X; x++)
-	{
-		v3s16 p(x,y,z);
-		try{
-			MapNode n = c->getNode(p_from + p);
-			m_data[m_area.index(p_to + p)] = n;
-		}
-		catch(InvalidPositionException &e)
-		{
-		}
-		
-		/*v3s16 p(x,y,z);
-		MapNode n(MATERIAL_IGNORE);
-		try{
-			n = c->getNode(p_from + p);
-		}
-		catch(InvalidPositionException &e)
-		{
+	/* The reason for this optimised code is that we're a member function
+	 * and the data type/layout of m_data is know to us: it's stored as
+	 * [z*h*w + y*h + x]. Therefore we can take the calls to m_area index
+	 * (which performs the preceding mapping/indexing of m_data) out of the
+	 * inner loop and calculate the next index as we're iterating to gain
+	 * performance.
+	 *
+	 * src_step and dest_step is the amount required to be added to our index
+	 * every time y increments. Because the destination area may be larger
+	 * than the source area we need one additional variable (otherwise we could
+	 * just continue adding dest_step as is done for the source data): dest_mod.
+	 * dest_mod is the difference in size between a "row" in the source data
+	 * and a "row" in the destination data (I am using the term row loosely
+	 * and for illustrative purposes). E.g.
+	 *
+	 * src       <-------------------->|'''''' dest mod ''''''''
+	 * dest      <--------------------------------------------->
+	 *
+	 * dest_mod (it's essentially a modulus) is added to the destination index
+	 * after every full iteration of the y span.
+	 *
+	 * This method falls under the category "linear array and incrementing
+	 * index".
+	 */
+
+	s32 src_step = src_area.getExtent().X;
+	s32 dest_step = m_area.getExtent().X;
+	s32 dest_mod = m_area.index(to_pos.X, to_pos.Y, to_pos.Z + 1)
+			- m_area.index(to_pos.X, to_pos.Y, to_pos.Z)
+			- dest_step * size.Y;
+
+	s32 i_src = src_area.index(from_pos.X, from_pos.Y, from_pos.Z);
+	s32 i_local = m_area.index(to_pos.X, to_pos.Y, to_pos.Z);
+
+	for (s16 z = 0; z < size.Z; z++) {
+		for (s16 y = 0; y < size.Y; y++) {
+			memcpy(&m_data[i_local], &src[i_src], size.X * sizeof(*m_data));
+			memset(&m_flags[i_local], 0, size.X);
+			i_src += src_step;
+			i_local += dest_step;
 		}
-		m_data[m_area.index(p_to + p)] = n;*/
+		i_local += dest_mod;
 	}
 }
 
-void VoxelManipulator::blitToNodeContainer
-		(v3s16 p_from, v3s16 p_to, v3s16 size, NodeContainer *c)
+void VoxelManipulator::copyTo(MapNode *dst, const VoxelArea& dst_area,
+		v3s16 dst_pos, v3s16 from_pos, const v3s16 &size)
 {
 	for(s16 z=0; z<size.Z; z++)
 	for(s16 y=0; y<size.Y; y++)
-	for(s16 x=0; x<size.X; x++)
 	{
-		v3s16 p(x,y,z);
-		try{
-			MapNode &n = m_data[m_area.index(p_from + p)];
-			if(n.d == MATERIAL_IGNORE)
-				continue;
-			c->setNode(p_to + p, n);
-		}
-		catch(InvalidPositionException &e)
-		{
+		s32 i_dst = dst_area.index(dst_pos.X, dst_pos.Y+y, dst_pos.Z+z);
+		s32 i_local = m_area.index(from_pos.X, from_pos.Y+y, from_pos.Z+z);
+		for (s16 x = 0; x < size.X; x++) {
+			if (m_data[i_local].getContent() != CONTENT_IGNORE)
+				dst[i_dst] = m_data[i_local];
+			i_dst++;
+			i_local++;
 		}
 	}
 }
-#endif
 
 /*
-	MapVoxelManipulator
+	Algorithms
+	-----------------------------------------------------
 */
 
-MapVoxelManipulator::MapVoxelManipulator(Map *map)
+void VoxelManipulator::clearFlag(u8 flags)
 {
-	m_map = map;
-}
+	// 0-1ms on moderate area
+	TimeTaker timer("clearFlag", &clearflag_time);
 
-void MapVoxelManipulator::emerge(VoxelArea a)
-{
-	v3s16 size = a.getExtent();
+	//v3s16 s = m_area.getExtent();
 
-	addArea(a);
-
-	for(s16 z=0; z<size.Z; z++)
-	for(s16 y=0; y<size.Y; y++)
-	for(s16 x=0; x<size.X; x++)
-	{
-		v3s16 p(x,y,z);
-		try{
-			MapNode n = m_map->getNode(a.MinEdge + p);
-			m_data[m_area.index(a.MinEdge + p)] = n;
-		}
-		catch(InvalidPositionException &e)
-		{
-		}
-	}
-}
+	/*dstream<<"clearFlag clearing area of size "
+			<<""<<s.X<<"x"<<s.Y<<"x"<<s.Z<<""
+			<<std::endl;*/
 
-void MapVoxelManipulator::blitBack
-		(core::map<v3s16, MapBlock*> & modified_blocks)
-{
-	/*
-		Initialize block cache
-	*/
-	v3s16 blockpos_last;
-	MapBlock *block = NULL;
-	bool block_checked_in_modified = false;
+	//s32 count = 0;
 
-	for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
+	/*for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
 	for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
 	for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
 	{
-		v3s16 p(x,y,z);
-
-		MapNode &n = m_data[m_area.index(p)];
-		if(n.d == MATERIAL_IGNORE)
-			continue;
-			
-		v3s16 blockpos = getNodeBlockPos(p);
-		
-		try
-		{
-			// Get block
-			if(block == NULL || blockpos != blockpos_last){
-				block = m_map->getBlockNoCreate(blockpos);
-				blockpos_last = blockpos;
-				block_checked_in_modified = false;
-			}
-			
-			// Calculate relative position in block
-			v3s16 relpos = p - blockpos * MAP_BLOCKSIZE;
-
-			// Don't continue if nothing has changed here
-			if(block->getNode(relpos) == n)
-				continue;
-
-			//m_map->setNode(m_area.MinEdge + p, n);
-			block->setNode(relpos, n);
-			
-			/*
-				Make sure block is in modified_blocks
-			*/
-			if(block_checked_in_modified == false)
-			{
-				modified_blocks[blockpos] = block;
-				block_checked_in_modified = true;
-			}
-		}
-		catch(InvalidPositionException &e)
-		{
-		}
+		u8 f = m_flags[m_area.index(x,y,z)];
+		m_flags[m_area.index(x,y,z)] &= ~flags;
+		if(m_flags[m_area.index(x,y,z)] != f)
+			count++;
+	}*/
+
+	s32 volume = m_area.getVolume();
+	for(s32 i=0; i<volume; i++)
+	{
+		m_flags[i] &= ~flags;
 	}
+
+	/*s32 volume = m_area.getVolume();
+	for(s32 i=0; i<volume; i++)
+	{
+		u8 f = m_flags[i];
+		m_flags[i] &= ~flags;
+		if(m_flags[i] != f)
+			count++;
+	}
+
+	dstream<<"clearFlag changed "<<count<<" flags out of "
+			<<volume<<" nodes"<<std::endl;*/
 }
 
+const MapNode VoxelManipulator::ContentIgnoreNode = MapNode(CONTENT_IGNORE);
+
 //END