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q_msg.c
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q_msg.c
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/*
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.
*/
#include "common.h"
#include "protocol.h"
#include "q_msg.h"
sizebuf_t msg_write;
byte msg_write_buffer[MAX_MSGLEN];
sizebuf_t msg_read;
byte msg_read_buffer[MAX_MSGLEN];
/*
==============================================================================
MESSAGE IO FUNCTIONS
Handles byte ordering and avoids alignment errors
==============================================================================
*/
const entity_state_t nullEntityState;
const player_state_t nullPlayerState;
const usercmd_t nullUserCmd;
/*
=============
MSG_Init
=============
*/
void MSG_Init(void)
{
// initialize default buffers
// don't allow them to overflow
SZ_TagInit(&msg_read, msg_read_buffer, MAX_MSGLEN, SZ_MSG_READ);
SZ_TagInit(&msg_write, msg_write_buffer, MAX_MSGLEN, SZ_MSG_WRITE);
}
//
// writing functions
//
/*
=============
MSG_BeginWriting
=============
*/
void MSG_BeginWriting(void)
{
msg_write.cursize = 0;
msg_write.bitpos = 0;
msg_write.overflowed = qfalse;
}
/*
=============
MSG_WriteChar
=============
*/
void MSG_WriteChar(int c)
{
byte *buf;
#ifdef PARANOID
if (c < -128 || c > 127)
Com_Error(ERR_FATAL, "MSG_WriteChar: range error");
#endif
buf = SZ_GetSpace(&msg_write, 1);
buf[0] = c;
}
/*
=============
MSG_WriteByte
=============
*/
void MSG_WriteByte(int c)
{
byte *buf;
#ifdef PARANOID
if (c < 0 || c > 255)
Com_Error(ERR_FATAL, "MSG_WriteByte: range error");
#endif
buf = SZ_GetSpace(&msg_write, 1);
buf[0] = c;
}
/*
=============
MSG_WriteShort
=============
*/
void MSG_WriteShort(int c)
{
byte *buf;
#ifdef PARANOID
if (c < ((short)0x8000) || c > (short)0x7fff)
Com_Error(ERR_FATAL, "MSG_WriteShort: range error");
#endif
buf = SZ_GetSpace(&msg_write, 2);
buf[0] = c & 0xff;
buf[1] = c >> 8;
}
/*
=============
MSG_WriteLong
=============
*/
void MSG_WriteLong(int c)
{
byte *buf;
buf = SZ_GetSpace(&msg_write, 4);
buf[0] = c & 0xff;
buf[1] = (c >> 8) & 0xff;
buf[2] = (c >> 16) & 0xff;
buf[3] = c >> 24;
}
/*
=============
MSG_WriteString
=============
*/
void MSG_WriteString(const char *string)
{
size_t length;
if (!string) {
MSG_WriteByte(0);
return;
}
length = strlen(string);
if (length >= MAX_NET_STRING) {
Com_WPrintf("%s: overflow: %"PRIz" chars", __func__, length);
MSG_WriteByte(0);
return;
}
MSG_WriteData(string, length + 1);
}
/*
=============
MSG_WriteCoord
=============
*/
#define COORD2SHORT(x) ((int)((x)*8.0f))
#define SHORT2COORD(x) ((x)*(1.0f/8))
static inline void MSG_WriteCoord(float f)
{
MSG_WriteShort(COORD2SHORT(f));
}
/*
=============
MSG_WritePos
=============
*/
void MSG_WritePos(const vec3_t pos)
{
MSG_WriteCoord(pos[0]);
MSG_WriteCoord(pos[1]);
MSG_WriteCoord(pos[2]);
}
/*
=============
MSG_WriteAngle
=============
*/
#define ANGLE2BYTE(x) ((int)((x)*256.0f/360)&255)
#define BYTE2ANGLE(x) ((x)*(360.0f/256))
void MSG_WriteAngle(float f)
{
MSG_WriteByte(ANGLE2BYTE(f));
}
/*
=============
MSG_WriteAngle16
=============
*/
static inline void MSG_WriteAngle16(float f)
{
MSG_WriteShort(ANGLE2SHORT(f));
}
#if USE_CLIENT
/*
=============
MSG_WriteDeltaUsercmd
=============
*/
int MSG_WriteDeltaUsercmd(const usercmd_t *from, const usercmd_t *cmd, int version)
{
int bits, buttons = cmd->buttons & BUTTON_MASK;
if (!from) {
from = &nullUserCmd;
}
//
// 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;
MSG_WriteByte(bits);
if (version >= PROTOCOL_VERSION_R1Q2_UCMD) {
if (bits & CM_BUTTONS) {
if ((bits & CM_FORWARD) && !(cmd->forwardmove % 5)) {
buttons |= BUTTON_FORWARD;
}
if ((bits & CM_SIDE) && !(cmd->sidemove % 5)) {
buttons |= BUTTON_SIDE;
}
if ((bits & CM_UP) && !(cmd->upmove % 5)) {
buttons |= BUTTON_UP;
}
MSG_WriteByte(buttons);
}
}
if (bits & CM_ANGLE1)
MSG_WriteShort(cmd->angles[0]);
if (bits & CM_ANGLE2)
MSG_WriteShort(cmd->angles[1]);
if (bits & CM_ANGLE3)
MSG_WriteShort(cmd->angles[2]);
if (bits & CM_FORWARD) {
if (buttons & BUTTON_FORWARD) {
MSG_WriteChar(cmd->forwardmove / 5);
} else {
MSG_WriteShort(cmd->forwardmove);
}
}
if (bits & CM_SIDE) {
if (buttons & BUTTON_SIDE) {
MSG_WriteChar(cmd->sidemove / 5);
} else {
MSG_WriteShort(cmd->sidemove);
}
}
if (bits & CM_UP) {
if (buttons & BUTTON_UP) {
MSG_WriteChar(cmd->upmove / 5);
} else {
MSG_WriteShort(cmd->upmove);
}
}
if (version < PROTOCOL_VERSION_R1Q2_UCMD) {
if (bits & CM_BUTTONS)
MSG_WriteByte(cmd->buttons);
}
if (bits & CM_IMPULSE)
MSG_WriteByte(cmd->impulse);
MSG_WriteByte(cmd->msec);
return bits;
}
/*
=============
MSG_WriteBits
=============
*/
void MSG_WriteBits(int value, int bits)
{
int i;
size_t bitpos;
if (bits == 0 || bits < -31 || bits > 32) {
Com_Error(ERR_FATAL, "MSG_WriteBits: bad bits: %d", bits);
}
if (msg_write.maxsize - msg_write.cursize < 4) {
Com_Error(ERR_FATAL, "MSG_WriteBits: overflow");
}
if (bits < 0) {
bits = -bits;
}
bitpos = msg_write.bitpos;
if ((bitpos & 7) == 0) {
// optimized case
switch (bits) {
case 8:
MSG_WriteByte(value);
return;
case 16:
MSG_WriteShort(value);
return;
case 32:
MSG_WriteLong(value);
return;
default:
break;
}
}
for (i = 0; i < bits; i++, bitpos++) {
if ((bitpos & 7) == 0) {
msg_write.data[bitpos >> 3] = 0;
}
msg_write.data[bitpos >> 3] |= (value & 1) << (bitpos & 7);
value >>= 1;
}
msg_write.bitpos = bitpos;
msg_write.cursize = (bitpos + 7) >> 3;
}
/*
=============
MSG_WriteDeltaUsercmd_Enhanced
=============
*/
int MSG_WriteDeltaUsercmd_Enhanced(const usercmd_t *from,
const usercmd_t *cmd,
int version)
{
int bits, delta, count;
if (!from) {
from = &nullUserCmd;
}
//
// 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->msec != from->msec)
bits |= CM_IMPULSE;
if (!bits) {
MSG_WriteBits(0, 1);
return 0;
}
MSG_WriteBits(1, 1);
MSG_WriteBits(bits, 8);
if (bits & CM_ANGLE1) {
delta = cmd->angles[0] - from->angles[0];
if (delta >= -128 && delta <= 127) {
MSG_WriteBits(1, 1);
MSG_WriteBits(delta, -8);
} else {
MSG_WriteBits(0, 1);
MSG_WriteBits(cmd->angles[0], -16);
}
}
if (bits & CM_ANGLE2) {
delta = cmd->angles[1] - from->angles[1];
if (delta >= -128 && delta <= 127) {
MSG_WriteBits(1, 1);
MSG_WriteBits(delta, -8);
} else {
MSG_WriteBits(0, 1);
MSG_WriteBits(cmd->angles[1], -16);
}
}
if (bits & CM_ANGLE3) {
MSG_WriteBits(cmd->angles[2], -16);
}
if (version >= PROTOCOL_VERSION_Q2PRO_UCMD) {
count = -10;
} else {
count = -16;
}
if (bits & CM_FORWARD) {
MSG_WriteBits(cmd->forwardmove, count);
}
if (bits & CM_SIDE) {
MSG_WriteBits(cmd->sidemove, count);
}
if (bits & CM_UP) {
MSG_WriteBits(cmd->upmove, count);
}
if (bits & CM_BUTTONS) {
int buttons = (cmd->buttons & 3) | (cmd->buttons >> 5);
MSG_WriteBits(buttons, 3);
}
if (bits & CM_IMPULSE) {
MSG_WriteBits(cmd->msec, 8);
}
return bits;
}
#endif // USE_CLIENT
void MSG_WriteDir(const vec3_t dir)
{
int best;
best = DirToByte(dir);
MSG_WriteByte(best);
}
// values transmitted over network are discrete, so
// we use special macros to check for delta conditions
#define delta_angle(a,b) (ANGLE2BYTE(b)!=ANGLE2BYTE(a))
#define delta_angle16(a,b) (ANGLE2SHORT(b)!=ANGLE2SHORT(a))
#define delta_angle16_v(a,b) \
(delta_angle16(a[0],b[0])|| \
delta_angle16(a[1],b[1])|| \
delta_angle16(a[2],b[2]))
#define delta_coord(a,b) (COORD2SHORT(b)!=COORD2SHORT(a))
#define delta_pos_v(a,b) \
(delta_coord(a[0],b[0])|| \
delta_coord(a[1],b[1])|| \
delta_coord(a[2],b[2]))
#define delta_ofs(a,b) ((int)((b)*4)!=(int)((a)*4))
#define delta_ofs_v(a,b) \
(delta_ofs(a[0],b[0])|| \
delta_ofs(a[1],b[1])|| \
delta_ofs(a[2],b[2]))
#define delta_blend(a,b) ((int)((b)*255)!=(int)((a)*255))
#define delta_blend_v(a,b) \
(delta_blend(a[0],b[0])|| \
delta_blend(a[1],b[1])|| \
delta_blend(a[2],b[2])|| \
delta_blend(a[3],b[3]))
#define delta_fov(a,b) ((int)(b)!=(int)(a))
/*
==================
MSG_WriteDeltaEntity
Writes part of a packetentities message.
Can delta from either a baseline or a previous packet_entity
==================
*/
void MSG_WriteDeltaEntity(const entity_state_t *from,
const entity_state_t *to,
msgEsFlags_t flags)
{
unsigned bits, mask;
if (!to) {
if (!from) {
Com_Error(ERR_DROP, "%s: NULL", __func__);
}
if (from->number < 1 || from->number >= MAX_EDICTS) {
Com_Error(ERR_DROP, "%s: bad number: %d", __func__, from->number);
}
bits = U_REMOVE;
if (from->number >= 256) {
bits |= U_NUMBER16 | U_MOREBITS1;
}
MSG_WriteByte(bits & 255);
if (bits & 0x0000ff00)
MSG_WriteByte((bits >> 8) & 255);
if (bits & U_NUMBER16)
MSG_WriteShort(from->number);
else
MSG_WriteByte(from->number);
return; // remove entity
}
if (to->number < 1 || to->number >= MAX_EDICTS) {
Com_Error(ERR_DROP, "%s: bad number: %d", __func__, to->number);
}
if (!from) {
from = &nullEntityState;
}
// send an update
bits = 0;
if (!(flags & MSG_ES_FIRSTPERSON)) {
if (delta_coord(to->origin[0], from->origin[0]))
bits |= U_ORIGIN1;
if (delta_coord(to->origin[1], from->origin[1]))
bits |= U_ORIGIN2;
if (delta_coord(to->origin[2], from->origin[2]))
bits |= U_ORIGIN3;
if (flags & MSG_ES_SHORTANGLES) {
if (delta_angle16(to->angles[0], from->angles[0]))
bits |= U_ANGLE1 | U_ANGLE16;
if (delta_angle16(to->angles[1], from->angles[1]))
bits |= U_ANGLE2 | U_ANGLE16;
if (delta_angle16(to->angles[2], from->angles[2]))
bits |= U_ANGLE3 | U_ANGLE16;
} else {
if (delta_angle(to->angles[0], from->angles[0]))
bits |= U_ANGLE1;
if (delta_angle(to->angles[1], from->angles[1]))
bits |= U_ANGLE2;
if (delta_angle(to->angles[2], from->angles[2]))
bits |= U_ANGLE3;
}
if (flags & MSG_ES_NEWENTITY) {
if (delta_pos_v(to->old_origin, from->origin)) {
bits |= U_OLDORIGIN;
}
}
}
if (flags & MSG_ES_UMASK) {
mask = 0xffff0000;
} else {
mask = 0xffff8000; // don't confuse old clients
}
if (to->skinnum != from->skinnum) {
if (to->skinnum & mask) {
bits |= U_SKIN8 | U_SKIN16;
} else if (to->skinnum & 0x0000ff00) {
bits |= U_SKIN16;
} else {
bits |= U_SKIN8;
}
}
if (to->frame != from->frame) {
if (to->frame < 256)
bits |= U_FRAME8;
else
bits |= U_FRAME16;
}
if (to->effects != from->effects) {
if (to->effects & mask) {
bits |= U_EFFECTS8 | U_EFFECTS16;
} else if (to->effects & 0x0000ff00) {
bits |= U_EFFECTS16;
} else {
bits |= U_EFFECTS8;
}
}
if (to->renderfx != from->renderfx) {
if (to->renderfx & mask) {
bits |= U_RENDERFX8 | U_RENDERFX16;
} else if (to->renderfx & 0x0000ff00) {
bits |= U_RENDERFX16;
} else {
bits |= U_RENDERFX8;
}
}
if (to->solid != from->solid)
bits |= U_SOLID;
// event is not delta compressed, just 0 compressed
if (to->event)
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 (to->renderfx & RF_FRAMELERP) {
bits |= U_OLDORIGIN;
} else if (to->renderfx & RF_BEAM) {
if (flags & MSG_ES_BEAMORIGIN) {
if (delta_pos_v(to->old_origin, from->old_origin))
bits |= U_OLDORIGIN;
} else {
bits |= U_OLDORIGIN;
}
}
//
// write the message
//
if (!bits && !(flags & MSG_ES_FORCE))
return; // nothing to send!
if (flags & MSG_ES_REMOVE) {
bits |= U_REMOVE; // used for MVD stream only
}
//----------
if (to->number >= 256)
bits |= U_NUMBER16; // number8 is implicit otherwise
if (bits & 0xff000000)
bits |= U_MOREBITS3 | U_MOREBITS2 | U_MOREBITS1;
else if (bits & 0x00ff0000)
bits |= U_MOREBITS2 | U_MOREBITS1;
else if (bits & 0x0000ff00)
bits |= U_MOREBITS1;
MSG_WriteByte(bits & 255);
if (bits & 0xff000000) {
MSG_WriteByte((bits >> 8) & 255);
MSG_WriteByte((bits >> 16) & 255);
MSG_WriteByte((bits >> 24) & 255);
} else if (bits & 0x00ff0000) {
MSG_WriteByte((bits >> 8) & 255);
MSG_WriteByte((bits >> 16) & 255);
} else if (bits & 0x0000ff00) {
MSG_WriteByte((bits >> 8) & 255);
}
//----------
if (bits & U_NUMBER16)
MSG_WriteShort(to->number);
else
MSG_WriteByte(to->number);
if (bits & U_MODEL)
MSG_WriteByte(to->modelindex);
if (bits & U_MODEL2)
MSG_WriteByte(to->modelindex2);
if (bits & U_MODEL3)
MSG_WriteByte(to->modelindex3);
if (bits & U_MODEL4)
MSG_WriteByte(to->modelindex4);
if (bits & U_FRAME8)
MSG_WriteByte(to->frame);
else if (bits & U_FRAME16)
MSG_WriteShort(to->frame);
if ((bits & (U_SKIN8 | U_SKIN16)) == (U_SKIN8 | U_SKIN16)) //used for laser colors
MSG_WriteLong(to->skinnum);
else if (bits & U_SKIN8)
MSG_WriteByte(to->skinnum);
else if (bits & U_SKIN16)
MSG_WriteShort(to->skinnum);
if ((bits & (U_EFFECTS8 | U_EFFECTS16)) == (U_EFFECTS8 | U_EFFECTS16))
MSG_WriteLong(to->effects);
else if (bits & U_EFFECTS8)
MSG_WriteByte(to->effects);
else if (bits & U_EFFECTS16)
MSG_WriteShort(to->effects);
if ((bits & (U_RENDERFX8 | U_RENDERFX16)) == (U_RENDERFX8 | U_RENDERFX16))
MSG_WriteLong(to->renderfx);
else if (bits & U_RENDERFX8)
MSG_WriteByte(to->renderfx);
else if (bits & U_RENDERFX16)
MSG_WriteShort(to->renderfx);
if (bits & U_ORIGIN1)
MSG_WriteCoord(to->origin[0]);
if (bits & U_ORIGIN2)
MSG_WriteCoord(to->origin[1]);
if (bits & U_ORIGIN3)
MSG_WriteCoord(to->origin[2]);
if ((flags & MSG_ES_SHORTANGLES) && (bits & U_ANGLE16)) {
if (bits & U_ANGLE1)
MSG_WriteAngle16(to->angles[0]);
if (bits & U_ANGLE2)
MSG_WriteAngle16(to->angles[1]);
if (bits & U_ANGLE3)
MSG_WriteAngle16(to->angles[2]);
} else {
if (bits & U_ANGLE1)
MSG_WriteAngle(to->angles[0]);
if (bits & U_ANGLE2)
MSG_WriteAngle(to->angles[1]);
if (bits & U_ANGLE3)
MSG_WriteAngle(to->angles[2]);
}
if (bits & U_OLDORIGIN)
MSG_WritePos(to->old_origin);
if (bits & U_SOUND)
MSG_WriteByte(to->sound);
if (bits & U_EVENT)
MSG_WriteByte(to->event);
if (bits & U_SOLID) {
if (flags & MSG_ES_LONGSOLID) {
MSG_WriteLong(to->solid);
} else {
MSG_WriteShort(to->solid);
}
}
}
/*
==================
MSG_WriteDeltaPlayerstate_Default
==================
*/
void MSG_WriteDeltaPlayerstate_Default(const player_state_t *from, const player_state_t *to)
{
int i;
int pflags;
int statbits;
if (!to) {
Com_Error(ERR_DROP, "%s: NULL", __func__);
}
if (!from) {
from = &nullPlayerState;
}
//
// determine what needs to be sent
//
pflags = 0;
if (to->pmove.pm_type != from->pmove.pm_type)
pflags |= PS_M_TYPE;
if (to->pmove.origin[0] != from->pmove.origin[0] ||
to->pmove.origin[1] != from->pmove.origin[1] ||
to->pmove.origin[2] != from->pmove.origin[2]) {
pflags |= PS_M_ORIGIN;
}
if (to->pmove.velocity[0] != from->pmove.velocity[0] ||
to->pmove.velocity[1] != from->pmove.velocity[1] ||
to->pmove.velocity[2] != from->pmove.velocity[2]) {
pflags |= PS_M_VELOCITY;
}
if (to->pmove.pm_time != from->pmove.pm_time)
pflags |= PS_M_TIME;
if (to->pmove.pm_flags != from->pmove.pm_flags)
pflags |= PS_M_FLAGS;
if (to->pmove.gravity != from->pmove.gravity)
pflags |= PS_M_GRAVITY;
if (to->pmove.delta_angles[0] != from->pmove.delta_angles[0] ||
to->pmove.delta_angles[1] != from->pmove.delta_angles[1] ||
to->pmove.delta_angles[2] != from->pmove.delta_angles[2]) {
pflags |= PS_M_DELTA_ANGLES;
}
if (delta_ofs_v(to->viewoffset, from->viewoffset)) {
pflags |= PS_VIEWOFFSET;
}
if (delta_angle16_v(to->viewangles, from->viewangles)) {
pflags |= PS_VIEWANGLES;
}
if (delta_ofs_v(to->kick_angles, from->kick_angles)) {
pflags |= PS_KICKANGLES;
}
if (delta_blend_v(to->blend, from->blend)) {
pflags |= PS_BLEND;
}
if (delta_fov(to->fov, from->fov))
pflags |= PS_FOV;
if (to->rdflags != from->rdflags)
pflags |= PS_RDFLAGS;
if (to->gunframe != from->gunframe ||
delta_ofs_v(to->gunoffset, from->gunoffset) ||
delta_ofs_v(to->gunangles, from->gunangles)) {
pflags |= PS_WEAPONFRAME;
}
if (to->gunindex != from->gunindex)
pflags |= PS_WEAPONINDEX;
//
// write it
//
MSG_WriteShort(pflags);
//
// write the pmove_state_t
//
if (pflags & PS_M_TYPE)
MSG_WriteByte(to->pmove.pm_type);
if (pflags & PS_M_ORIGIN) {
MSG_WriteShort(to->pmove.origin[0]);
MSG_WriteShort(to->pmove.origin[1]);
MSG_WriteShort(to->pmove.origin[2]);
}
if (pflags & PS_M_VELOCITY) {
MSG_WriteShort(to->pmove.velocity[0]);
MSG_WriteShort(to->pmove.velocity[1]);
MSG_WriteShort(to->pmove.velocity[2]);
}
if (pflags & PS_M_TIME)
MSG_WriteByte(to->pmove.pm_time);
if (pflags & PS_M_FLAGS)
MSG_WriteByte(to->pmove.pm_flags);
if (pflags & PS_M_GRAVITY)
MSG_WriteShort(to->pmove.gravity);
if (pflags & PS_M_DELTA_ANGLES) {
MSG_WriteShort(to->pmove.delta_angles[0]);
MSG_WriteShort(to->pmove.delta_angles[1]);
MSG_WriteShort(to->pmove.delta_angles[2]);
}
//
// write the rest of the player_state_t
//
if (pflags & PS_VIEWOFFSET) {
MSG_WriteChar(to->viewoffset[0] * 4);
MSG_WriteChar(to->viewoffset[1] * 4);
MSG_WriteChar(to->viewoffset[2] * 4);
}
if (pflags & PS_VIEWANGLES) {
MSG_WriteAngle16(to->viewangles[0]);
MSG_WriteAngle16(to->viewangles[1]);
MSG_WriteAngle16(to->viewangles[2]);
}
if (pflags & PS_KICKANGLES) {
MSG_WriteChar(to->kick_angles[0] * 4);
MSG_WriteChar(to->kick_angles[1] * 4);
MSG_WriteChar(to->kick_angles[2] * 4);
}
if (pflags & PS_WEAPONINDEX) {
MSG_WriteByte(to->gunindex);
}
if (pflags & PS_WEAPONFRAME) {
MSG_WriteByte(to->gunframe);
MSG_WriteChar(to->gunoffset[0] * 4);
MSG_WriteChar(to->gunoffset[1] * 4);
MSG_WriteChar(to->gunoffset[2] * 4);
MSG_WriteChar(to->gunangles[0] * 4);
MSG_WriteChar(to->gunangles[1] * 4);
MSG_WriteChar(to->gunangles[2] * 4);
}
if (pflags & PS_BLEND) {
MSG_WriteByte(to->blend[0] * 255);
MSG_WriteByte(to->blend[1] * 255);
MSG_WriteByte(to->blend[2] * 255);
MSG_WriteByte(to->blend[3] * 255);
}
if (pflags & PS_FOV)
MSG_WriteByte(to->fov);
if (pflags & PS_RDFLAGS)
MSG_WriteByte(to->rdflags);
// send stats
statbits = 0;
for (i = 0; i < MAX_STATS; i++)
if (to->stats[i] != from->stats[i])
statbits |= 1 << i;
MSG_WriteLong(statbits);
for (i = 0; i < MAX_STATS; i++)
if (statbits & (1 << i))
MSG_WriteShort(to->stats[i]);
}
/*
==================
MSG_WriteDeltaPlayerstate_Enhanced
==================
*/
int MSG_WriteDeltaPlayerstate_Enhanced(const player_state_t *from,
player_state_t *to,
msgPsFlags_t flags)
{
int i;
int pflags, extraflags;
int statbits;
if (!to) {
Com_Error(ERR_DROP, "%s: NULL", __func__);
}
if (!from) {
from = &nullPlayerState;
}
//
// determine what needs to be sent
//
pflags = 0;
extraflags = 0;
if (to->pmove.pm_type != from->pmove.pm_type)
pflags |= PS_M_TYPE;
if (to->pmove.origin[0] != from->pmove.origin[0] ||
to->pmove.origin[1] != from->pmove.origin[1]) {
pflags |= PS_M_ORIGIN;
}
if (to->pmove.origin[2] != from->pmove.origin[2]) {
extraflags |= EPS_M_ORIGIN2;
}
if (!(flags & MSG_PS_IGNORE_PREDICTION)) {
if (to->pmove.velocity[0] != from->pmove.velocity[0] ||
to->pmove.velocity[1] != from->pmove.velocity[1]) {
pflags |= PS_M_VELOCITY;
}
if (to->pmove.velocity[2] != from->pmove.velocity[2]) {
extraflags |= EPS_M_VELOCITY2;
}
if (to->pmove.pm_time != from->pmove.pm_time)
pflags |= PS_M_TIME;
if (to->pmove.pm_flags != from->pmove.pm_flags)