// attempt to punch through firewall by firing off UDP packets at the opponent
// exchange game information
int network_connect( void )
{
#ifdef __BLACKBERRY__
#else
SDLNet_ResolveHost(&ip, network_opponent_host, network_opponent_port);
SDLNet_UDP_Bind(socket, 0, &ip);
Uint16 episodes = 0, episodes_local = 0;
assert(EPISODE_MAX <= 16);
for (int i = EPISODE_MAX - 1; i >= 0; i--)
{
episodes <<= 1;
episodes |= (episodeAvail[i] != 0);
}
episodes_local = episodes;
assert(NET_PACKET_SIZE - 12 >= 20 + 1);
if (strlen(network_player_name) > 20)
network_player_name[20] = '\0';
connect_reset:
network_prepare(PACKET_CONNECT);
SDLNet_Write16(NET_VERSION, &packet_out_temp->data[4]);
SDLNet_Write16(network_delay, &packet_out_temp->data[6]);
SDLNet_Write16(episodes_local, &packet_out_temp->data[8]);
SDLNet_Write16(thisPlayerNum, &packet_out_temp->data[10]);
strcpy((char *)&packet_out_temp->data[12], network_player_name);
network_send(12 + strlen(network_player_name) + 1); // PACKET_CONNECT
// until opponent sends connect packet
while (true)
{
push_joysticks_as_keyboard();
service_SDL_events(false);
if (newkey && lastkey_sym == SDLK_ESCAPE)
network_tyrian_halt(0, false);
// never timeout
last_in_tick = SDL_GetTicks();
if (packet_in[0] && SDLNet_Read16(&packet_in[0]->data[0]) == PACKET_CONNECT)
break;
network_update();
network_check();
SDL_Delay(16);
}
connect_again:
if (SDLNet_Read16(&packet_in[0]->data[4]) != NET_VERSION)
{
fprintf(stderr, "error: network version did not match opponent's\n");
network_tyrian_halt(4, true);
}
if (SDLNet_Read16(&packet_in[0]->data[6]) != network_delay)
{
fprintf(stderr, "error: network delay did not match opponent's\n");
network_tyrian_halt(5, true);
}
if (SDLNet_Read16(&packet_in[0]->data[10]) == thisPlayerNum)
{
fprintf(stderr, "error: player number conflicts with opponent's\n");
network_tyrian_halt(6, true);
}
episodes = SDLNet_Read16(&packet_in[0]->data[8]);
for (int i = 0; i < EPISODE_MAX; i++) {
episodeAvail[i] &= (episodes & 1);
episodes >>= 1;
}
network_opponent_name = malloc(packet_in[0]->len - 12 + 1);
strcpy(network_opponent_name, (char *)&packet_in[0]->data[12]);
network_update();
// until opponent has acknowledged
while (!network_is_sync())
{
service_SDL_events(false);
// got a duplicate packet; process it again (but why?)
if (packet_in[0] && SDLNet_Read16(&packet_in[0]->data[0]) == PACKET_CONNECT)
goto connect_again;
network_check();
// maybe opponent didn't get our packet
if (SDL_GetTicks() - last_out_tick > NET_RETRY)
goto connect_reset;
SDL_Delay(16);
}
// send another packet since sometimes the network syncs without both connect packets exchanged
// there should be a better way to handle this
network_prepare(PACKET_CONNECT);
SDLNet_Write16(NET_VERSION, &packet_out_temp->data[4]);
SDLNet_Write16(network_delay, &packet_out_temp->data[6]);
SDLNet_Write16(episodes_local, &packet_out_temp->data[8]);
SDLNet_Write16(thisPlayerNum, &packet_out_temp->data[10]);
strcpy((char *)&packet_out_temp->data[12], network_player_name);
network_send(12 + strlen(network_player_name) + 1); // PACKET_CONNECT
connected = true;
#endif
return 0;
}
/**
* Run the main game loop until the finished flag is set at 40fps (25ms interval).
*/
static void openrct2_loop()
{
uint32 currentTick, ticksElapsed, lastTick = 0;
static uint32 uncapTick = 0;
static int fps = 0;
static uint32 secondTick = 0;
log_verbose("begin openrct2 loop");
_finished = 0;
do {
if (gConfigGeneral.uncap_fps && gGameSpeed <= 4) {
currentTick = SDL_GetTicks();
if (uncapTick == 0) {
// Reset sprite locations
uncapTick = SDL_GetTicks();
openrct2_reset_object_tween_locations();
}
// Limit number of updates per loop (any long pauses or debugging can make this update for a very long time)
if (currentTick - uncapTick > 25 * 60) {
uncapTick = currentTick - 25 - 1;
}
platform_process_messages();
while (uncapTick <= currentTick && currentTick - uncapTick > 25) {
// Get the original position of each sprite
for (uint16 i = 0; i < MAX_SPRITES; i++) {
_spritelocations1[i].x = g_sprite_list[i].unknown.x;
_spritelocations1[i].y = g_sprite_list[i].unknown.y;
_spritelocations1[i].z = g_sprite_list[i].unknown.z;
}
// Update the game so the sprite positions update
rct2_update();
// Get the next position of each sprite
for (uint16 i = 0; i < MAX_SPRITES; i++) {
_spritelocations2[i].x = g_sprite_list[i].unknown.x;
_spritelocations2[i].y = g_sprite_list[i].unknown.y;
_spritelocations2[i].z = g_sprite_list[i].unknown.z;
}
uncapTick += 25;
}
// Tween the position of each sprite from the last position to the new position based on the time between the last
// tick and the next tick.
float nudge = 1 - ((float)(currentTick - uncapTick) / 25);
for (uint16 i = 0; i < MAX_SPRITES; i++) {
if (!sprite_should_tween(&g_sprite_list[i]))
continue;
sprite_move(
_spritelocations2[i].x + (sint16)((_spritelocations1[i].x - _spritelocations2[i].x) * nudge),
_spritelocations2[i].y + (sint16)((_spritelocations1[i].y - _spritelocations2[i].y) * nudge),
_spritelocations2[i].z + (sint16)((_spritelocations1[i].z - _spritelocations2[i].z) * nudge),
&g_sprite_list[i]
);
invalidate_sprite_2(&g_sprite_list[i]);
}
if ((SDL_GetWindowFlags(gWindow) & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_HIDDEN)) == 0) {
rct2_draw();
platform_draw();
}
fps++;
if (SDL_GetTicks() - secondTick >= 1000) {
fps = 0;
secondTick = SDL_GetTicks();
}
// Restore the real positions of the sprites so they aren't left at the mid-tween positions
for (uint16 i = 0; i < MAX_SPRITES; i++) {
if (!sprite_should_tween(&g_sprite_list[i]))
continue;
invalidate_sprite_2(&g_sprite_list[i]);
sprite_move(_spritelocations2[i].x, _spritelocations2[i].y, _spritelocations2[i].z, &g_sprite_list[i]);
}
network_update();
} else {
uncapTick = 0;
currentTick = SDL_GetTicks();
ticksElapsed = currentTick - lastTick;
if (ticksElapsed < 25) {
if (ticksElapsed < 15)
SDL_Delay(15 - ticksElapsed);
continue;
}
lastTick = currentTick;
platform_process_messages();
rct2_update();
if ((SDL_GetWindowFlags(gWindow) & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_HIDDEN)) == 0) {
rct2_draw();
platform_draw();
}
}
} while (!_finished);
}