X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Futility.cpp;h=7c87b9ae4f06e326279c20ac0d31a030964ba724;hb=c8997e48c070b8fcc460f01ba90896ad3afbf8b5;hp=0721100cb98e845871e033aaf5920fcb9a624a14;hpb=1c90f9fc2eba43be71f9d49dad75c5d0514d4e50;p=oweals%2Fminetest.git

diff --git a/src/utility.cpp b/src/utility.cpp
index 0721100cb..7c87b9ae4 100644
--- a/src/utility.cpp
+++ b/src/utility.cpp
@@ -25,6 +25,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "gettime.h"
 #include "sha1.h"
 #include "base64.h"
+#include "log.h"
+#include <iomanip>
 
 TimeTaker::TimeTaker(const char *name, u32 *result)
 {
@@ -47,7 +49,7 @@ u32 TimeTaker::stop(bool quiet)
 		else
 		{
 			if(quiet == false)
-				std::cout<<m_name<<" took "<<dtime<<"ms"<<std::endl;
+				infostream<<m_name<<" took "<<dtime<<"ms"<<std::endl;
 		}
 		m_running = false;
 		return dtime;
@@ -156,14 +158,29 @@ void mysrand(unsigned seed)
    next = seed;
 }
 
+int myrand_range(int min, int max)
+{
+	if(max-min > MYRAND_MAX)
+	{
+		errorstream<<"WARNING: myrand_range: max-min > MYRAND_MAX"<<std::endl;
+		assert(0);
+	}
+	if(min > max)
+	{
+		assert(0);
+		return max;
+	}
+	return (myrand()%(max-min+1))+min;
+}
+
 /*
 	blockpos: position of block in block coordinates
 	camera_pos: position of camera in nodes
 	camera_dir: an unit vector pointing to camera direction
 	range: viewing range
 */
-bool isBlockInSight(v3s16 blockpos_b, v3f camera_pos, v3f camera_dir, f32 range,
-		f32 *distance_ptr)
+bool isBlockInSight(v3s16 blockpos_b, v3f camera_pos, v3f camera_dir,
+		f32 camera_fov, f32 range, f32 *distance_ptr)
 {
 	v3s16 blockpos_nodes = blockpos_b * MAP_BLOCKSIZE;
 	
@@ -191,7 +208,7 @@ bool isBlockInSight(v3s16 blockpos_b, v3f camera_pos, v3f camera_dir, f32 range,
 		return true;
 
 	// If block is far away, it's not in sight
-	if(d > range * BS)
+	if(d > range)
 		return false;
 
 	// Maximum radius of a block
@@ -199,26 +216,119 @@ bool isBlockInSight(v3s16 blockpos_b, v3f camera_pos, v3f camera_dir, f32 range,
 	
 	// If block is (nearly) touching the camera, don't
 	// bother validating further (that is, render it anyway)
-	if(d > block_max_radius * 1.5)
-	{
-		// Cosine of the angle between the camera direction
-		// and the block direction (camera_dir is an unit vector)
-		f32 cosangle = dforward / d;
-		
-		// Compensate for the size of the block
-		// (as the block has to be shown even if it's a bit off FOV)
-		// This is an estimate.
-		cosangle += block_max_radius / dforward;
-
-		// If block is not in the field of view, skip it
-		//if(cosangle < cos(FOV_ANGLE/2))
-		if(cosangle < cos(FOV_ANGLE/2. * 4./3.))
-			return false;
-	}
+	if(d < block_max_radius)
+		return true;
+	
+	// Cosine of the angle between the camera direction
+	// and the block direction (camera_dir is an unit vector)
+	f32 cosangle = dforward / d;
+	
+	// Compensate for the size of the block
+	// (as the block has to be shown even if it's a bit off FOV)
+	// This is an estimate, plus an arbitary factor
+	cosangle += block_max_radius / d * 0.5;
+
+	// If block is not in the field of view, skip it
+	if(cosangle < cos(camera_fov / 2))
+		return false;
 
 	return true;
 }
 
+// Creates a string encoded in JSON format (almost equivalent to a C string literal)
+std::string serializeJsonString(const std::string &plain)
+{
+	std::ostringstream os(std::ios::binary);
+	os<<"\"";
+	for(size_t i = 0; i < plain.size(); i++)
+	{
+		char c = plain[i];
+		switch(c)
+		{
+			case '"': os<<"\\\""; break;
+			case '\\': os<<"\\\\"; break;
+			case '/': os<<"\\/"; break;
+			case '\b': os<<"\\b"; break;
+			case '\f': os<<"\\f"; break;
+			case '\n': os<<"\\n"; break;
+			case '\r': os<<"\\r"; break;
+			case '\t': os<<"\\t"; break;
+			default:
+			{
+				if(c >= 32 && c <= 126)
+				{
+					os<<c;
+				}
+				else
+				{
+					u32 cnum = (u32) (u8) c;
+					os<<"\\u"<<std::hex<<std::setw(4)<<std::setfill('0')<<cnum;
+				}
+				break;
+			}
+		}
+	}
+	os<<"\"";
+	return os.str();
+}
+
+// Reads a string encoded in JSON format
+std::string deSerializeJsonString(std::istream &is)
+{
+	std::ostringstream os(std::ios::binary);
+	char c, c2;
+
+	// Parse initial doublequote
+	is >> c;
+	if(c != '"')
+		throw SerializationError("JSON string must start with doublequote");
+
+	// Parse characters
+	for(;;)
+	{
+		c = is.get();
+		if(is.eof())
+			throw SerializationError("JSON string ended prematurely");
+		if(c == '"')
+		{
+			return os.str();
+		}
+		else if(c == '\\')
+		{
+			c2 = is.get();
+			if(is.eof())
+				throw SerializationError("JSON string ended prematurely");
+			switch(c2)
+			{
+				default:  os<<c2; break;
+				case 'b': os<<'\b'; break;
+				case 'f': os<<'\f'; break;
+				case 'n': os<<'\n'; break;
+				case 'r': os<<'\r'; break;
+				case 't': os<<'\t'; break;
+				case 'u':
+				{
+					char hexdigits[4+1];
+					is.read(hexdigits, 4);
+					if(is.eof())
+						throw SerializationError("JSON string ended prematurely");
+					hexdigits[4] = 0;
+					std::istringstream tmp_is(hexdigits, std::ios::binary);
+					int hexnumber;
+					tmp_is >> std::hex >> hexnumber;
+					os<<((char)hexnumber);
+					break;
+				}
+			}
+		}
+		else
+		{
+			os<<c;
+		}
+	}
+	return os.str();
+}
+
 // Get an sha-1 hash of the player's name combined with
 // the password entered. That's what the server uses as
 // their password. (Exception : if the password field is
@@ -240,3 +350,103 @@ std::string translatePassword(std::string playername, std::wstring password)
 
 
 
+PointedThing::PointedThing():
+	type(POINTEDTHING_NOTHING),
+	node_undersurface(0,0,0),
+	node_abovesurface(0,0,0),
+	object_id(-1)
+{}
+
+std::string PointedThing::dump() const
+{
+	std::ostringstream os(std::ios::binary);
+	if(type == POINTEDTHING_NOTHING)
+	{
+		os<<"[nothing]";
+	}
+	else if(type == POINTEDTHING_NODE)
+	{
+		const v3s16 &u = node_undersurface;
+		const v3s16 &a = node_abovesurface;
+		os<<"[node under="<<u.X<<","<<u.Y<<","<<u.Z
+			<< " above="<<a.X<<","<<a.Y<<","<<a.Z<<"]";
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		os<<"[object "<<object_id<<"]";
+	}
+	else
+	{
+		os<<"[unknown PointedThing]";
+	}
+	return os.str();
+}
+
+void PointedThing::serialize(std::ostream &os) const
+{
+	writeU8(os, 0); // version
+	writeU8(os, (u8)type);
+	if(type == POINTEDTHING_NOTHING)
+	{
+		// nothing
+	}
+	else if(type == POINTEDTHING_NODE)
+	{
+		writeV3S16(os, node_undersurface);
+		writeV3S16(os, node_abovesurface);
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		writeS16(os, object_id);
+	}
+}
+
+void PointedThing::deSerialize(std::istream &is)
+{
+	int version = readU8(is);
+	if(version != 0) throw SerializationError(
+			"unsupported PointedThing version");
+	type = (PointedThingType) readU8(is);
+	if(type == POINTEDTHING_NOTHING)
+	{
+		// nothing
+	}
+	else if(type == POINTEDTHING_NODE)
+	{
+		node_undersurface = readV3S16(is);
+		node_abovesurface = readV3S16(is);
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		object_id = readS16(is);
+	}
+	else
+	{
+		throw SerializationError(
+			"unsupported PointedThingType");
+	}
+}
+
+bool PointedThing::operator==(const PointedThing &pt2) const
+{
+	if(type != pt2.type)
+		return false;
+	if(type == POINTEDTHING_NODE)
+	{
+		if(node_undersurface != pt2.node_undersurface)
+			return false;
+		if(node_abovesurface != pt2.node_abovesurface)
+			return false;
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		if(object_id != pt2.object_id)
+			return false;
+	}
+	return true;
+}
+
+bool PointedThing::operator!=(const PointedThing &pt2) const
+{
+	return !(*this == pt2);
+}