major refactoring in game, server and client package

1 files changed, 551 insertions, 554 deletions

diff --git a/src/jake2/qcommon/MSG.java b/src/jake2/qcommon/MSG.java
index 4396ac3..ee2a089 100644
--- a/src/jake2/qcommon/MSG.java
+++ b/src/jake2/qcommon/MSG.java
@@ -1,562 +1,559 @@
 /*
-Copyright (C) 1997-2001 Id Software, Inc.
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-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 General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-
-*/
+ * Copyright (C) 1997-2001 Id Software, Inc.
+ * 
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307, USA.
+ *  
+ */
 
 // Created on 29.11.2003 by RST.
-// $Id: MSG.java,v 1.4 2004-07-28 11:58:10 hzi Exp $
-
+// $Id: MSG.java,v 1.5 2004-09-22 19:22:09 salomo Exp $
 package jake2.qcommon;
 
+import jake2.Globals;
 import jake2.game.*;
 import jake2.util.*;
 
-public class MSG extends GameBase {
-
-	//
-	// writing functions
-	//
-
-	//ok.
-	public static void WriteChar(sizebuf_t sb, int c) {
-		sb.data[SZ.GetSpace(sb, 1)] = (byte) (c & 0xFF);
-	}
-	
-	//ok.
-	public static void WriteChar(sizebuf_t sb, float c) {
-
-		WriteChar(sb, (int) c);
-	}
-	
-	//ok.
-	public static void WriteByte(sizebuf_t sb, int c) {
-		sb.data[SZ.GetSpace(sb, 1)] = (byte) (c & 0xFF);
-	}
-
-	//ok.
-	public static void WriteByte(sizebuf_t sb, float c) {
-		WriteByte(sb, (int) c);
-	}
-
-
-	public static void WriteShort(sizebuf_t sb, int c) {
-		int i = SZ.GetSpace(sb, 2);
-		sb.data[i++] = (byte) (c & 0xff);
-		sb.data[i] = (byte) ((c >>> 8) & 0xFF);
-	}
-
-	//ok.
-	public static void WriteInt(sizebuf_t sb, int c) {
-		int i = SZ.GetSpace(sb, 4);
-		sb.data[i++] = (byte) ((c & 0xff));
-		sb.data[i++] = (byte) ((c >>> 8) & 0xff);
-		sb.data[i++] = (byte) ((c >>> 16) & 0xff);
-		sb.data[i++] = (byte) ((c >>> 24) & 0xff);
-	}
-
-	//ok.
-	public static void WriteLong(sizebuf_t sb, int c) {
-		WriteInt(sb, c);
-	}
-
-	//ok.
-	public static void WriteFloat(sizebuf_t sb, float f) {
-		WriteInt(sb, Float.floatToIntBits(f));
-	}
-
-	// had a bug, now its ok.
-	public static void WriteString(sizebuf_t sb, String s) {
-		String x = s;
-
-		if (s == null)
-			x = "";
-
-		SZ.Write(sb, x.getBytes());
-		WriteByte(sb, 0);
-	}
-
-	//ok.
-	public static void WriteString(sizebuf_t sb, byte s[]) {
-		WriteString(sb, new String(s).trim());
-	}
-
-	public static void WriteCoord(sizebuf_t sb, float f) {
-		WriteShort(sb, (int) (f * 8));
-	}
-
-	public static void WritePos(sizebuf_t sb, float[] pos) {
-		assert(pos.length == 3) : "vec3_t bug";
-		WriteShort(sb, (int) (pos[0] * 8));
-		WriteShort(sb, (int) (pos[1] * 8));
-		WriteShort(sb, (int) (pos[2] * 8));
-	}
-
-	public static void WriteAngle(sizebuf_t sb, float f) {
-		WriteByte(sb, (int) (f * 256 / 360) & 255);
-	}
-
-	public static void WriteAngle16(sizebuf_t sb, float f) {
-		WriteShort(sb, Math3D.ANGLE2SHORT(f));
-	}
-
-	public static void WriteDeltaUsercmd(sizebuf_t buf, usercmd_t from, usercmd_t cmd) {
-		int bits;
-
-		//
-		// send the movement message
-		//
-		bits = 0;
-		if (cmd.angles[0] != from.angles[0])
-			bits |= CM_ANGLE1;
-		if (cmd.angles[1] != from.angles[1])
-			bits |= CM_ANGLE2;
-		if (cmd.angles[2] != from.angles[2])
-			bits |= CM_ANGLE3;
-		if (cmd.forwardmove != from.forwardmove)
-			bits |= CM_FORWARD;
-		if (cmd.sidemove != from.sidemove)
-			bits |= CM_SIDE;
-		if (cmd.upmove != from.upmove)
-			bits |= CM_UP;
-		if (cmd.buttons != from.buttons)
-			bits |= CM_BUTTONS;
-		if (cmd.impulse != from.impulse)
-			bits |= CM_IMPULSE;
-
-		WriteByte(buf, bits);
-
-		if ((bits & CM_ANGLE1) != 0)
-			WriteShort(buf, cmd.angles[0]);
-		if ((bits & CM_ANGLE2) != 0)
-			WriteShort(buf, cmd.angles[1]);
-		if ((bits & CM_ANGLE3) != 0)
-			WriteShort(buf, cmd.angles[2]);
-
-		if ((bits & CM_FORWARD) != 0)
-			WriteShort(buf, cmd.forwardmove);
-		if ((bits & CM_SIDE) != 0)
-			WriteShort(buf, cmd.sidemove);
-		if ((bits & CM_UP) != 0)
-			WriteShort(buf, cmd.upmove);
-
-		if ((bits & CM_BUTTONS) != 0)
-			WriteByte(buf, cmd.buttons);
-		if ((bits & CM_IMPULSE) != 0)
-			WriteByte(buf, cmd.impulse);
-
-		WriteByte(buf, cmd.msec);
-		WriteByte(buf, cmd.lightlevel);
-	}
-
-	//should be ok.
-	public static void WriteDir(sizebuf_t sb, float[] dir) {
-		int i, best;
-		float d, bestd;
-
-		if (dir == null) {
-			WriteByte(sb, 0);
-			return;
-		}
-
-		bestd = 0;
-		best = 0;
-		for (i = 0; i < NUMVERTEXNORMALS; i++) {
-			d = Math3D.DotProduct(dir, bytedirs[i]);
-			if (d > bestd) {
-				bestd = d;
-				best = i;
-			}
-		}
-		WriteByte(sb, best);
-	}
-	
-	//should be ok.
-	public static void ReadDir(sizebuf_t sb, float[] dir) {
-		int b;
-
-		b = ReadByte(sb);
-		if (b >= NUMVERTEXNORMALS)
-			Com.Error(ERR_DROP, "MSF_ReadDir: out of range");
-		Math3D.VectorCopy(bytedirs[b], dir);
-	}
-
-	/*
-	==================
-	WriteDeltaEntity
-	
-	Writes part of a packetentities message.
-	Can delta from either a baseline or a previous packet_entity
-	==================
-	*/
-	public static void WriteDeltaEntity(entity_state_t from, entity_state_t to, sizebuf_t msg, boolean force, boolean newentity) {
-		int bits;
-
-		if (0 == to.number)
-			Com.Error(ERR_FATAL, "Unset entity number");
-		if (to.number >= MAX_EDICTS)
-			Com.Error(ERR_FATAL, "Entity number >= MAX_EDICTS");
-
-		// send an update
-		bits = 0;
-
-		if (to.number >= 256)
-			bits |= U_NUMBER16; // number8 is implicit otherwise
-
-		if (to.origin[0] != from.origin[0])
-			bits |= U_ORIGIN1;
-		if (to.origin[1] != from.origin[1])
-			bits |= U_ORIGIN2;
-		if (to.origin[2] != from.origin[2])
-			bits |= U_ORIGIN3;
-
-		if (to.angles[0] != from.angles[0])
-			bits |= U_ANGLE1;
-		if (to.angles[1] != from.angles[1])
-			bits |= U_ANGLE2;
-		if (to.angles[2] != from.angles[2])
-			bits |= U_ANGLE3;
-
-		if (to.skinnum != from.skinnum) {
-			if (to.skinnum < 256)
-				bits |= U_SKIN8;
-			else if (to.skinnum < 0x10000)
-				bits |= U_SKIN16;
-			else
-				bits |= (U_SKIN8 | U_SKIN16);
-		}
-
-		if (to.frame != from.frame) {
-			if (to.frame < 256)
-				bits |= U_FRAME8;
-			else
-				bits |= U_FRAME16;
-		}
-
-		if (to.effects != from.effects) {
-			if (to.effects < 256)
-				bits |= U_EFFECTS8;
-			else if (to.effects < 0x8000)
-				bits |= U_EFFECTS16;
-			else
-				bits |= U_EFFECTS8 | U_EFFECTS16;
-		}
-
-		if (to.renderfx != from.renderfx) {
-			if (to.renderfx < 256)
-				bits |= U_RENDERFX8;
-			else if (to.renderfx < 0x8000)
-				bits |= U_RENDERFX16;
-			else
-				bits |= U_RENDERFX8 | U_RENDERFX16;
-		}
-
-		if (to.solid != from.solid)
-			bits |= U_SOLID;
-
-		// event is not delta compressed, just 0 compressed
-		if (to.event != 0)
-			bits |= U_EVENT;
-
-		if (to.modelindex != from.modelindex)
-			bits |= U_MODEL;
-		if (to.modelindex2 != from.modelindex2)
-			bits |= U_MODEL2;
-		if (to.modelindex3 != from.modelindex3)
-			bits |= U_MODEL3;
-		if (to.modelindex4 != from.modelindex4)
-			bits |= U_MODEL4;
-
-		if (to.sound != from.sound)
-			bits |= U_SOUND;
-
-		if (newentity || (to.renderfx & RF_BEAM) != 0)
-			bits |= U_OLDORIGIN;
-
-		//
-		// write the message
-		//
-		if (bits == 0 && !force)
-			return; // nothing to send!
-
-		//----------
-
-		if ((bits & 0xff000000) != 0)
-			bits |= U_MOREBITS3 | U_MOREBITS2 | U_MOREBITS1;
-		else if ((bits & 0x00ff0000) != 0)
-			bits |= U_MOREBITS2 | U_MOREBITS1;
-		else if ((bits & 0x0000ff00) != 0)
-			bits |= U_MOREBITS1;
-
-		WriteByte(msg, bits & 255);
-
-		if ((bits & 0xff000000) != 0) {
-			WriteByte(msg, (bits >>> 8) & 255);
-			WriteByte(msg, (bits >>> 16) & 255);
-			WriteByte(msg, (bits >>> 24) & 255);
-		}
-		else if ((bits & 0x00ff0000) != 0) {
-			WriteByte(msg, (bits >>> 8) & 255);
-			WriteByte(msg, (bits >>> 16) & 255);
-		}
-		else if ((bits & 0x0000ff00) != 0) {
-			WriteByte(msg, (bits >>> 8) & 255);
-		}
-
-		//----------
-
-		if ((bits & U_NUMBER16) != 0)
-			WriteShort(msg, to.number);
-		else
-			WriteByte(msg, to.number);
-
-		if ((bits & U_MODEL) != 0)
-			WriteByte(msg, to.modelindex);
-		if ((bits & U_MODEL2) != 0)
-			WriteByte(msg, to.modelindex2);
-		if ((bits & U_MODEL3) != 0)
-			WriteByte(msg, to.modelindex3);
-		if ((bits & U_MODEL4) != 0)
-			WriteByte(msg, to.modelindex4);
-
-		if ((bits & U_FRAME8) != 0)
-			WriteByte(msg, to.frame);
-		if ((bits & U_FRAME16) != 0)
-			WriteShort(msg, to.frame);
-
-		if ((bits & U_SKIN8) != 0 && (bits & U_SKIN16) != 0) //used for laser colors
-			WriteInt(msg, to.skinnum);
-		else if ((bits & U_SKIN8) != 0)
-			WriteByte(msg, to.skinnum);
-		else if ((bits & U_SKIN16) != 0)
-			WriteShort(msg, to.skinnum);
-
-		if ((bits & (U_EFFECTS8 | U_EFFECTS16)) == (U_EFFECTS8 | U_EFFECTS16))
-			WriteInt(msg, to.effects);
-		else if ((bits & U_EFFECTS8) != 0)
-			WriteByte(msg, to.effects);
-		else if ((bits & U_EFFECTS16) != 0)
-			WriteShort(msg, to.effects);
-
-		if ((bits & (U_RENDERFX8 | U_RENDERFX16)) == (U_RENDERFX8 | U_RENDERFX16))
-			WriteInt(msg, to.renderfx);
-		else if ((bits & U_RENDERFX8) != 0)
-			WriteByte(msg, to.renderfx);
-		else if ((bits & U_RENDERFX16) != 0)
-			WriteShort(msg, to.renderfx);
-
-		if ((bits & U_ORIGIN1) != 0)
-			WriteCoord(msg, to.origin[0]);
-		if ((bits & U_ORIGIN2) != 0)
-			WriteCoord(msg, to.origin[1]);
-		if ((bits & U_ORIGIN3) != 0)
-			WriteCoord(msg, to.origin[2]);
-
-		if ((bits & U_ANGLE1) != 0)
-			WriteAngle(msg, to.angles[0]);
-		if ((bits & U_ANGLE2) != 0)
-			WriteAngle(msg, to.angles[1]);
-		if ((bits & U_ANGLE3) != 0)
-			WriteAngle(msg, to.angles[2]);
-
-		if ((bits & U_OLDORIGIN) != 0) {
-			WriteCoord(msg, to.old_origin[0]);
-			WriteCoord(msg, to.old_origin[1]);
-			WriteCoord(msg, to.old_origin[2]);
-		}
-
-		if ((bits & U_SOUND) != 0)
-			WriteByte(msg, to.sound);
-		if ((bits & U_EVENT) != 0)
-			WriteByte(msg, to.event);
-		if ((bits & U_SOLID) != 0)
-			WriteShort(msg, to.solid);
-	}
-
-	//============================================================
-
-	//
-	// reading functions
-	//
-
-	public static void BeginReading(sizebuf_t msg) {
-		msg.readcount = 0;
-	}
-
-	// returns -1 if no more characters are available, but also [-128 , 127]
-	public static int ReadChar(sizebuf_t msg_read) {
-		int c;
-
-		if (msg_read.readcount + 1 > msg_read.cursize)
-			c = -1;
-		else
-			c = msg_read.data[msg_read.readcount];
-		msg_read.readcount++;
-		// kickangles bugfix (rst)
-		return c;
-	}
-
-	public static int ReadByte(sizebuf_t msg_read) {
-		int c;
-
-		if (msg_read.readcount + 1 > msg_read.cursize)
-			c = -1;
-		else
-			c = msg_read.data[msg_read.readcount] & 0xff;
-		msg_read.readcount++;
-
-		return c;
-	}
-
-	public static short ReadShort(sizebuf_t msg_read) {
-		int c;
-
-		if (msg_read.readcount + 2 > msg_read.cursize)
-			c = -1;
-		else
-			c = (short) ((msg_read.data[msg_read.readcount] & 0xff) + (msg_read.data[msg_read.readcount + 1] << 8));
-
-		msg_read.readcount += 2;
-
-		return (short) c;
-	}
-
-	public static int ReadLong(sizebuf_t msg_read) {
-		int c;
-
-		if (msg_read.readcount + 4 > msg_read.cursize)
-		{
-			Com.Printf("buffer underrun in ReadLong!");
-			c = -1;
-		}
-		
-		else
-			c =
-				(msg_read.data[msg_read.readcount] & 0xff)
-					| ((msg_read.data[msg_read.readcount + 1] & 0xff) << 8)
-					| ((msg_read.data[msg_read.readcount + 2] & 0xff) << 16)
-					| ((msg_read.data[msg_read.readcount + 3] & 0xff) << 24);
-
-		msg_read.readcount += 4;
-
-		return c;
-	}
-
-	public static float ReadFloat(sizebuf_t msg_read) {
-		int n = ReadLong(msg_read);
-		return Float.intBitsToFloat(n);
-	}
-
-	// 2k read  buffer.
-	public static byte readbuf[] = new byte[2048];
-
-	public static String ReadString(sizebuf_t msg_read) {
-
-		byte c;
-		int l = 0;
-		do {
-			c = (byte)ReadByte(msg_read);
-			if (c == -1 || c == 0)
-				break;
-
-			readbuf[l] = c;
-			l++;
-		} while (l < 2047);
-
-		return new String(readbuf, 0, l);
-	}
-
-	public static String ReadStringLine(sizebuf_t msg_read) {
-
-		int l;
-		byte c;
-
-		l = 0;
-		do {
-			c = (byte) ReadChar(msg_read);
-			if (c == -1 || c == 0 || c == 0x0a)
-				break;
-			readbuf[l] = c;
-			l++;
-		} while (l < 2047);
-
-		return new String(readbuf, 0, l).trim();
-	}
-
-	public static float ReadCoord(sizebuf_t msg_read) {
-		return ReadShort(msg_read) * (1.0f / 8);
-	}
-
-	public static void ReadPos(sizebuf_t msg_read, float pos[]) {
-		assert(pos.length == 3) : "vec3_t bug";
-		pos[0] = ReadShort(msg_read) * (1.0f / 8);
-		pos[1] = ReadShort(msg_read) * (1.0f / 8);
-		pos[2] = ReadShort(msg_read) * (1.0f / 8);
-	}
-
-	public static float ReadAngle(sizebuf_t msg_read) {
-		return ReadChar(msg_read) * (360.0f / 256);
-	}
-
-	public static float ReadAngle16(sizebuf_t msg_read) {
-		return Math3D.SHORT2ANGLE(ReadShort(msg_read));
-	}
-
-	public static void ReadDeltaUsercmd(sizebuf_t msg_read, usercmd_t from, usercmd_t move) {
-		int bits;
-
-		//memcpy(move, from, sizeof(* move));
-		// IMPORTANT!! copy without new
-		move.set(from);
-		bits = ReadByte(msg_read);
-
-		// read current angles
-		if ((bits & CM_ANGLE1) != 0)
-			move.angles[0] = ReadShort(msg_read);
-		if ((bits & CM_ANGLE2) != 0)
-			move.angles[1] = ReadShort(msg_read);
-		if ((bits & CM_ANGLE3) != 0)
-			move.angles[2] = ReadShort(msg_read);
-
-		// read movement
-		if ((bits & CM_FORWARD) != 0)
-			move.forwardmove = ReadShort(msg_read);
-		if ((bits & CM_SIDE) != 0)
-			move.sidemove = ReadShort(msg_read);
-		if ((bits & CM_UP) != 0)
-			move.upmove = ReadShort(msg_read);
-
-		// read buttons
-		if ((bits & CM_BUTTONS) != 0)
-			move.buttons = (byte) ReadByte(msg_read);
-
-		if ((bits & CM_IMPULSE) != 0)
-			move.impulse = (byte) ReadByte(msg_read);
-
-		// read time to run command
-		move.msec = (byte) ReadByte(msg_read);
-
-		// read the light level
-		move.lightlevel = (byte) ReadByte(msg_read);
-	
-	}
-
-	public static void ReadData(sizebuf_t msg_read, byte data[], int len) {
-		for (int i = 0; i < len; i++)
-			data[i] = (byte) ReadByte(msg_read);
-	}
-}
+public class MSG extends Globals {
+
+    //
+    // writing functions
+    //
+
+    //ok.
+    public static void WriteChar(sizebuf_t sb, int c) {
+        sb.data[SZ.GetSpace(sb, 1)] = (byte) (c & 0xFF);
+    }
+
+    //ok.
+    public static void WriteChar(sizebuf_t sb, float c) {
+
+        WriteChar(sb, (int) c);
+    }
+
+    //ok.
+    public static void WriteByte(sizebuf_t sb, int c) {
+        sb.data[SZ.GetSpace(sb, 1)] = (byte) (c & 0xFF);
+    }
+
+    //ok.
+    public static void WriteByte(sizebuf_t sb, float c) {
+        WriteByte(sb, (int) c);
+    }
+
+    public static void WriteShort(sizebuf_t sb, int c) {
+        int i = SZ.GetSpace(sb, 2);
+        sb.data[i++] = (byte) (c & 0xff);
+        sb.data[i] = (byte) ((c >>> 8) & 0xFF);
+    }
+
+    //ok.
+    public static void WriteInt(sizebuf_t sb, int c) {
+        int i = SZ.GetSpace(sb, 4);
+        sb.data[i++] = (byte) ((c & 0xff));
+        sb.data[i++] = (byte) ((c >>> 8) & 0xff);
+        sb.data[i++] = (byte) ((c >>> 16) & 0xff);
+        sb.data[i++] = (byte) ((c >>> 24) & 0xff);
+    }
+
+    //ok.
+    public static void WriteLong(sizebuf_t sb, int c) {
+        WriteInt(sb, c);
+    }
+
+    //ok.
+    public static void WriteFloat(sizebuf_t sb, float f) {
+        WriteInt(sb, Float.floatToIntBits(f));
+    }
+
+    // had a bug, now its ok.
+    public static void WriteString(sizebuf_t sb, String s) {
+        String x = s;
+
+        if (s == null)
+            x = "";
+
+        SZ.Write(sb, x.getBytes());
+        WriteByte(sb, 0);
+    }
+
+    //ok.
+    public static void WriteString(sizebuf_t sb, byte s[]) {
+        WriteString(sb, new String(s).trim());
+    }
+
+    public static void WriteCoord(sizebuf_t sb, float f) {
+        WriteShort(sb, (int) (f * 8));
+    }
+
+    public static void WritePos(sizebuf_t sb, float[] pos) {
+        assert (pos.length == 3) : "vec3_t bug";
+        WriteShort(sb, (int) (pos[0] * 8));
+        WriteShort(sb, (int) (pos[1] * 8));
+        WriteShort(sb, (int) (pos[2] * 8));
+    }
+
+    public static void WriteAngle(sizebuf_t sb, float f) {
+        WriteByte(sb, (int) (f * 256 / 360) & 255);
+    }
+
+    public static void WriteAngle16(sizebuf_t sb, float f) {
+        WriteShort(sb, Math3D.ANGLE2SHORT(f));
+    }
+
+    public static void WriteDeltaUsercmd(sizebuf_t buf, usercmd_t from,
+            usercmd_t cmd) {
+        int bits;
+
+        //
+        // send the movement message
+        //
+        bits = 0;
+        if (cmd.angles[0] != from.angles[0])
+            bits |= CM_ANGLE1;
+        if (cmd.angles[1] != from.angles[1])
+            bits |= CM_ANGLE2;
+        if (cmd.angles[2] != from.angles[2])
+            bits |= CM_ANGLE3;
+        if (cmd.forwardmove != from.forwardmove)
+            bits |= CM_FORWARD;
+        if (cmd.sidemove != from.sidemove)
+            bits |= CM_SIDE;
+        if (cmd.upmove != from.upmove)
+            bits |= CM_UP;
+        if (cmd.buttons != from.buttons)
+            bits |= CM_BUTTONS;
+        if (cmd.impulse != from.impulse)
+            bits |= CM_IMPULSE;
+
+        WriteByte(buf, bits);
+
+        if ((bits & CM_ANGLE1) != 0)
+            WriteShort(buf, cmd.angles[0]);
+        if ((bits & CM_ANGLE2) != 0)
+            WriteShort(buf, cmd.angles[1]);
+        if ((bits & CM_ANGLE3) != 0)
+            WriteShort(buf, cmd.angles[2]);
+
+        if ((bits & CM_FORWARD) != 0)
+            WriteShort(buf, cmd.forwardmove);
+        if ((bits & CM_SIDE) != 0)
+            WriteShort(buf, cmd.sidemove);
+        if ((bits & CM_UP) != 0)
+            WriteShort(buf, cmd.upmove);
+
+        if ((bits & CM_BUTTONS) != 0)
+            WriteByte(buf, cmd.buttons);
+        if ((bits & CM_IMPULSE) != 0)
+            WriteByte(buf, cmd.impulse);
+
+        WriteByte(buf, cmd.msec);
+        WriteByte(buf, cmd.lightlevel);
+    }
+
+    //should be ok.
+    public static void WriteDir(sizebuf_t sb, float[] dir) {
+        int i, best;
+        float d, bestd;
+
+        if (dir == null) {
+            WriteByte(sb, 0);
+            return;
+        }
+
+        bestd = 0;
+        best = 0;
+        for (i = 0; i < NUMVERTEXNORMALS; i++) {
+            d = Math3D.DotProduct(dir, bytedirs[i]);
+            if (d > bestd) {
+                bestd = d;
+                best = i;
+            }
+        }
+        WriteByte(sb, best);
+    }
+
+    //should be ok.
+    public static void ReadDir(sizebuf_t sb, float[] dir) {
+        int b;
+
+        b = ReadByte(sb);
+        if (b >= NUMVERTEXNORMALS)
+            Com.Error(ERR_DROP, "MSF_ReadDir: out of range");
+        Math3D.VectorCopy(bytedirs[b], dir);
+    }
+
+    /*
+     * ================== WriteDeltaEntity
+     * 
+     * Writes part of a packetentities message. Can delta from either a baseline
+     * or a previous packet_entity ==================
+     */
+    public static void WriteDeltaEntity(entity_state_t from, entity_state_t to,
+            sizebuf_t msg, boolean force, boolean newentity) {
+        int bits;
+
+        if (0 == to.number)
+            Com.Error(ERR_FATAL, "Unset entity number");
+        if (to.number >= MAX_EDICTS)
+            Com.Error(ERR_FATAL, "Entity number >= MAX_EDICTS");
+
+        // send an update
+        bits = 0;
+
+        if (to.number >= 256)
+            bits |= U_NUMBER16; // number8 is implicit otherwise
+
+        if (to.origin[0] != from.origin[0])
+            bits |= U_ORIGIN1;
+        if (to.origin[1] != from.origin[1])
+            bits |= U_ORIGIN2;
+        if (to.origin[2] != from.origin[2])
+            bits |= U_ORIGIN3;
+
+        if (to.angles[0] != from.angles[0])
+            bits |= U_ANGLE1;
+        if (to.angles[1] != from.angles[1])
+            bits |= U_ANGLE2;
+        if (to.angles[2] != from.angles[2])
+            bits |= U_ANGLE3;
+
+        if (to.skinnum != from.skinnum) {
+            if (to.skinnum < 256)
+                bits |= U_SKIN8;
+            else if (to.skinnum < 0x10000)
+                bits |= U_SKIN16;
+            else
+                bits |= (U_SKIN8 | U_SKIN16);
+        }
+
+        if (to.frame != from.frame) {
+            if (to.frame < 256)
+                bits |= U_FRAME8;
+            else
+                bits |= U_FRAME16;
+        }
+
+        if (to.effects != from.effects) {
+            if (to.effects < 256)
+                bits |= U_EFFECTS8;
+            else if (to.effects < 0x8000)
+                bits |= U_EFFECTS16;
+            else
+                bits |= U_EFFECTS8 | U_EFFECTS16;
+        }
+
+        if (to.renderfx != from.renderfx) {
+            if (to.renderfx < 256)
+                bits |= U_RENDERFX8;
+            else if (to.renderfx < 0x8000)
+                bits |= U_RENDERFX16;
+            else
+                bits |= U_RENDERFX8 | U_RENDERFX16;
+        }
+
+        if (to.solid != from.solid)
+            bits |= U_SOLID;
+
+        // event is not delta compressed, just 0 compressed
+        if (to.event != 0)
+            bits |= U_EVENT;
+
+        if (to.modelindex != from.modelindex)
+            bits |= U_MODEL;
+        if (to.modelindex2 != from.modelindex2)
+            bits |= U_MODEL2;
+        if (to.modelindex3 != from.modelindex3)
+            bits |= U_MODEL3;
+        if (to.modelindex4 != from.modelindex4)
+            bits |= U_MODEL4;
+
+        if (to.sound != from.sound)
+            bits |= U_SOUND;
+
+        if (newentity || (to.renderfx & RF_BEAM) != 0)
+            bits |= U_OLDORIGIN;
+
+        //
+        // write the message
+        //
+        if (bits == 0 && !force)
+            return; // nothing to send!
+
+        //----------
+
+        if ((bits & 0xff000000) != 0)
+            bits |= U_MOREBITS3 | U_MOREBITS2 | U_MOREBITS1;
+        else if ((bits & 0x00ff0000) != 0)
+            bits |= U_MOREBITS2 | U_MOREBITS1;
+        else if ((bits & 0x0000ff00) != 0)
+            bits |= U_MOREBITS1;
+
+        WriteByte(msg, bits & 255);
+
+        if ((bits & 0xff000000) != 0) {
+            WriteByte(msg, (bits >>> 8) & 255);
+            WriteByte(msg, (bits >>> 16) & 255);
+            WriteByte(msg, (bits >>> 24) & 255);
+        } else if ((bits & 0x00ff0000) != 0) {
+            WriteByte(msg, (bits >>> 8) & 255);
+            WriteByte(msg, (bits >>> 16) & 255);
+        } else if ((bits & 0x0000ff00) != 0) {
+            WriteByte(msg, (bits >>> 8) & 255);
+        }
+
+        //----------
+
+        if ((bits & U_NUMBER16) != 0)
+            WriteShort(msg, to.number);
+        else
+            WriteByte(msg, to.number);
+
+        if ((bits & U_MODEL) != 0)
+            WriteByte(msg, to.modelindex);
+        if ((bits & U_MODEL2) != 0)
+            WriteByte(msg, to.modelindex2);
+        if ((bits & U_MODEL3) != 0)
+            WriteByte(msg, to.modelindex3);
+        if ((bits & U_MODEL4) != 0)
+            WriteByte(msg, to.modelindex4);
+
+        if ((bits & U_FRAME8) != 0)
+            WriteByte(msg, to.frame);
+        if ((bits & U_FRAME16) != 0)
+            WriteShort(msg, to.frame);
+
+        if ((bits & U_SKIN8) != 0 && (bits & U_SKIN16) != 0) //used for laser
+                                                             // colors
+            WriteInt(msg, to.skinnum);
+        else if ((bits & U_SKIN8) != 0)
+            WriteByte(msg, to.skinnum);
+        else if ((bits & U_SKIN16) != 0)
+            WriteShort(msg, to.skinnum);
+
+        if ((bits & (U_EFFECTS8 | U_EFFECTS16)) == (U_EFFECTS8 | U_EFFECTS16))
+            WriteInt(msg, to.effects);
+        else if ((bits & U_EFFECTS8) != 0)
+            WriteByte(msg, to.effects);
+        else if ((bits & U_EFFECTS16) != 0)
+            WriteShort(msg, to.effects);
+
+        if ((bits & (U_RENDERFX8 | U_RENDERFX16)) == (U_RENDERFX8 | U_RENDERFX16))
+            WriteInt(msg, to.renderfx);
+        else if ((bits & U_RENDERFX8) != 0)
+            WriteByte(msg, to.renderfx);
+        else if ((bits & U_RENDERFX16) != 0)
+            WriteShort(msg, to.renderfx);
+
+        if ((bits & U_ORIGIN1) != 0)
+            WriteCoord(msg, to.origin[0]);
+        if ((bits & U_ORIGIN2) != 0)
+            WriteCoord(msg, to.origin[1]);
+        if ((bits & U_ORIGIN3) != 0)
+            WriteCoord(msg, to.origin[2]);
+
+        if ((bits & U_ANGLE1) != 0)
+            WriteAngle(msg, to.angles[0]);
+        if ((bits & U_ANGLE2) != 0)
+            WriteAngle(msg, to.angles[1]);
+        if ((bits & U_ANGLE3) != 0)
+            WriteAngle(msg, to.angles[2]);
+
+        if ((bits & U_OLDORIGIN) != 0) {
+            WriteCoord(msg, to.old_origin[0]);
+            WriteCoord(msg, to.old_origin[1]);
+            WriteCoord(msg, to.old_origin[2]);
+        }
+
+        if ((bits & U_SOUND) != 0)
+            WriteByte(msg, to.sound);
+        if ((bits & U_EVENT) != 0)
+            WriteByte(msg, to.event);
+        if ((bits & U_SOLID) != 0)
+            WriteShort(msg, to.solid);
+    }
+
+    //============================================================
+
+    //
+    // reading functions
+    //
+
+    public static void BeginReading(sizebuf_t msg) {
+        msg.readcount = 0;
+    }
+
+    // returns -1 if no more characters are available, but also [-128 , 127]
+    public static int ReadChar(sizebuf_t msg_read) {
+        int c;
+
+        if (msg_read.readcount + 1 > msg_read.cursize)
+            c = -1;
+        else
+            c = msg_read.data[msg_read.readcount];
+        msg_read.readcount++;
+        // kickangles bugfix (rst)
+        return c;
+    }
+
+    public static int ReadByte(sizebuf_t msg_read) {
+        int c;
+
+        if (msg_read.readcount + 1 > msg_read.cursize)
+            c = -1;
+        else
+            c = msg_read.data[msg_read.readcount] & 0xff;
+        msg_read.readcount++;
+
+        return c;
+    }
+
+    public static short ReadShort(sizebuf_t msg_read) {
+        int c;
+
+        if (msg_read.readcount + 2 > msg_read.cursize)
+            c = -1;
+        else
+            c = (short) ((msg_read.data[msg_read.readcount] & 0xff) + (msg_read.data[msg_read.readcount + 1] << 8));
+
+        msg_read.readcount += 2;
+
+        return (short) c;
+    }
+
+    public static int ReadLong(sizebuf_t msg_read) {
+        int c;
+
+        if (msg_read.readcount + 4 > msg_read.cursize) {
+            Com.Printf("buffer underrun in ReadLong!");
+            c = -1;
+        }
+
+        else
+            c = (msg_read.data[msg_read.readcount] & 0xff)
+                    | ((msg_read.data[msg_read.readcount + 1] & 0xff) << 8)
+                    | ((msg_read.data[msg_read.readcount + 2] & 0xff) << 16)
+                    | ((msg_read.data[msg_read.readcount + 3] & 0xff) << 24);
+
+        msg_read.readcount += 4;
+
+        return c;
+    }
+
+    public static float ReadFloat(sizebuf_t msg_read) {
+        int n = ReadLong(msg_read);
+        return Float.intBitsToFloat(n);
+    }
+
+    // 2k read buffer.
+    public static byte readbuf[] = new byte[2048];
+
+    public static String ReadString(sizebuf_t msg_read) {
+
+        byte c;
+        int l = 0;
+        do {
+            c = (byte) ReadByte(msg_read);
+            if (c == -1 || c == 0)
+                break;
+
+            readbuf[l] = c;
+            l++;
+        } while (l < 2047);
+
+        return new String(readbuf, 0, l);
+    }
+
+    public static String ReadStringLine(sizebuf_t msg_read) {
+
+        int l;
+        byte c;
+
+        l = 0;
+        do {
+            c = (byte) ReadChar(msg_read);
+            if (c == -1 || c == 0 || c == 0x0a)
+                break;
+            readbuf[l] = c;
+            l++;
+        } while (l < 2047);
+
+        return new String(readbuf, 0, l).trim();
+    }
+
+    public static float ReadCoord(sizebuf_t msg_read) {
+        return ReadShort(msg_read) * (1.0f / 8);
+    }
+
+    public static void ReadPos(sizebuf_t msg_read, float pos[]) {
+        assert (pos.length == 3) : "vec3_t bug";
+        pos[0] = ReadShort(msg_read) * (1.0f / 8);
+        pos[1] = ReadShort(msg_read) * (1.0f / 8);
+        pos[2] = ReadShort(msg_read) * (1.0f / 8);
+    }
+
+    public static float ReadAngle(sizebuf_t msg_read) {
+        return ReadChar(msg_read) * (360.0f / 256);
+    }
+
+    public static float ReadAngle16(sizebuf_t msg_read) {
+        return Math3D.SHORT2ANGLE(ReadShort(msg_read));
+    }
+
+    public static void ReadDeltaUsercmd(sizebuf_t msg_read, usercmd_t from,
+            usercmd_t move) {
+        int bits;
+
+        //memcpy(move, from, sizeof(* move));
+        // IMPORTANT!! copy without new
+        move.set(from);
+        bits = ReadByte(msg_read);
+
+        // read current angles
+        if ((bits & CM_ANGLE1) != 0)
+            move.angles[0] = ReadShort(msg_read);
+        if ((bits & CM_ANGLE2) != 0)
+            move.angles[1] = ReadShort(msg_read);
+        if ((bits & CM_ANGLE3) != 0)
+            move.angles[2] = ReadShort(msg_read);
+
+        // read movement
+        if ((bits & CM_FORWARD) != 0)
+            move.forwardmove = ReadShort(msg_read);
+        if ((bits & CM_SIDE) != 0)
+            move.sidemove = ReadShort(msg_read);
+        if ((bits & CM_UP) != 0)
+            move.upmove = ReadShort(msg_read);
+
+        // read buttons
+        if ((bits & CM_BUTTONS) != 0)
+            move.buttons = (byte) ReadByte(msg_read);
+
+        if ((bits & CM_IMPULSE) != 0)
+            move.impulse = (byte) ReadByte(msg_read);
+
+        // read time to run command
+        move.msec = (byte) ReadByte(msg_read);
+
+        // read the light level
+        move.lightlevel = (byte) ReadByte(msg_read);
+
+    }
+
+    public static void ReadData(sizebuf_t msg_read, byte data[], int len) {
+        for (int i = 0; i < len; i++)
+            data[i] = (byte) ReadByte(msg_read);
+    }
+}
\ No newline at end of file