1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
* PARSEC -
*
* $Author: uberlinuxguy $ - $Date: 2004/09/15 12:25:30 $
*
* Orginally written by:
* Copyright (c) Clemens Beer <cbx@parsec.org> 2002-2003
*
* 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
*/
// C library
#include <stdio.h>
#include <string.h>
// compilation flags/debug support
#include "config.h"
#include "debug.h"
// general definitions
#include "general.h"
#include "objstruc.h"
// global externals
#include "globals.h"
// subsystem headers
#include "net_defs.h"
// utility modules
#include "utl_list.h"
// local module header
#include "net_prediction.h"
// proprietary module headers
#include "con_aux.h"
#include "e_record.h"
#include "g_extra.h"
#include "h_supp.h"
#include "net_game.h"
#include "net_stream.h"
#include "g_sfx.h"
// special implementation for a extra collect prediction event ----------------
//
G_PredEventExtraCollect::G_PredEventExtraCollect( ExtraObject* pExtra ) :
m_pExtra( pExtra )
{
ASSERT( pExtra != NULL );
}
// do the extra collection ----------------------------------------------------
//
void G_PredEventExtraCollect::Do()
{
char* pszMessage = TheGameExtraManager->CollectExtra( MyShip, m_pExtra );
// show message saying what type of extra has been collected
if ( m_nDoCount == 0 ) {
if ( pszMessage != NULL ) {
//#ifdef PARSEC_DEBUG
// WriteExtraCollectMessage( "G_PredEventExtraCollect::Do()" );
//#else // !PARSEC_DEBUG
WriteExtraCollectMessage( pszMessage );
//#endif // !PARSEC_DEBUG
} else {
MSGOUT( "CheckShipExtraCollision(): invalid extra type: %0x.", m_pExtra->ObjectType );
}
}
#ifdef PARSEC_DEBUG
MSGOUT( "G_PredEventExtraCollect::Do()" );
#endif // PARSEC_DEBUG
NET_PredEvent::Do();
}
//NOTE: stores information about events that were predicted in the game-engine
// whenever the game-engine modifies the local world, we save a prediction
// that includes a checkpoint ( = next outgoing message id )
// whenever we receive a packet, we clear all predictions inserted before
// the ACK checkpoint and we re-apply all pending predictions not yet
// ACK ( checkpoint # is synonym for message id )
// standard ctor --------------------------------------------------------------
//
NET_PredictionManager::NET_PredictionManager( NET_Stream* pStream )
{
ASSERT( pStream != NULL );
m_predictions = new UTL_List<NET_PredEvent*>;
m_pStream = pStream;
}
// standard dtor --------------------------------------------------------------
//
NET_PredictionManager::~NET_PredictionManager()
{
Reset();
delete m_predictions;
}
// reset ----------------------------------------------------------------------
//
void NET_PredictionManager::Reset()
{
// remove all predictions
for( LE_PredEvt* entry = m_predictions->GetHead(); entry != NULL; entry = entry->m_pNext ) {
delete entry->m_data;
}
m_predictions->Clear();
}
// clear all predictions up to the message# and reapply all predictions after the message#
//
void NET_PredictionManager::DoCheckpoint( dword MessageId )
{
for( LE_PredEvt* pEntry = m_predictions->GetHead(); pEntry != NULL; ) {
LE_PredEvt* pNext = pEntry->m_pNext;
NET_PredEvent* pPred = pEntry->m_data;
if ( pPred->GetMessageId() <= MessageId ) {
#ifdef PARSEC_DEBUG
MSGOUT( "NET_PredictionManager::DoCheckpoint(): removing ACK prediction ( pred-msgid %d <= msgid %d)", pPred->GetMessageId(), MessageId );
#endif // PARSEC_DEBUG
delete m_predictions->RemoveEntry( pEntry );
} else {
#ifdef PARSEC_DEBUG
int nDoCountBefore = pPred->GetDoCount();
MSGOUT( "NET_PredictionManager::DoCheckpoint(): reapplying prediction ( pred-msgid %d > msgid %d)", pPred->GetMessageId(), MessageId );
#endif // PARSEC_DEBUG
pPred->Do();
#ifdef PARSEC_DEBUG
ASSERT( pPred->GetDoCount() == ( nDoCountBefore + 1 ) );
#endif // PARSEC_DEBUG
}
pEntry = pNext;
}
}
// add a predictionevent ------------------------------------------------------
// ensures that MAX_NUM_PREDICTIONS is not exceeded
void NET_PredictionManager::_AddPrediction( NET_PredEvent* pEvent )
{
// check for prediction choke ( server does not send ACKs for checkpoints fast enough )
if ( m_predictions->GetNumEntries() >= MAX_NUM_PREDICTIONS ) {
MSGOUT( "NET_PredictionManager::_AddPrediction(): prediction list overflow" );
return;
} else {
m_predictions->AppendTail( pEvent );
pEvent->SetMessageId( m_pStream->GetNextOutMessageId() );
#ifdef PARSEC_DEBUG
int nDoCountBefore = pEvent->GetDoCount();
MSGOUT( "NET_PredictionManager::_AddPrediction() at msgid: %d", m_pStream->GetNextOutMessageId() );
#endif // PARSEC_DEBUG
pEvent->Do();
#ifdef PARSEC_DEBUG
ASSERT( pEvent->GetDoCount() == ( nDoCountBefore + 1 ) );
#endif // PARSEC_DEBUG
}
}
// add a prediction event for collecting an extra -----------------------------
//
void NET_PredictionManager::PredictExtraCollect( ExtraObject* pExtra )
{
ASSERT( pExtra != NULL );
_AddPrediction( new G_PredEventExtraCollect( pExtra ) );
}
|
