void
CheckForCollisions(void)
{
//bounce off walls
if (roundf(g_pongBall.x) > DISPLAY_WIDTH - 1)
{
g_pongBall.x = DISPLAY_WIDTH - 1;
g_pongBall.xSpeed = -g_pongBall.xSpeed;
}
if (roundf(g_pongBall.x) < 0)
{
g_pongBall.x = 0;
g_pongBall.xSpeed = -g_pongBall.xSpeed;
}
//bounce ball off paddles
if (g_pongBall.y > 14 && g_pongBall.y < DISPLAY_HEIGHT - 1)
{
if (g_pongBall.x >= g_player.x &&
g_pongBall.x <= g_player.x + PADDLE_WIDTH)
{
g_pongBall.ySpeed = -g_pongBall.ySpeed;
g_pongBall.y = 14;
AccelerateBall(&g_pongBall);
NudgeBall(&g_pongBall, 1);
}
}
else if (g_pongBall.y < 1 && g_pongBall.y > 0)
{
if (g_pongBall.x >= g_comp.x &&
g_pongBall.x <= g_comp.x + PADDLE_WIDTH)
{
g_pongBall.ySpeed = -g_pongBall.ySpeed;
g_pongBall.y = 1;
AccelerateBall(&g_pongBall);
NudgeBall(&g_pongBall, 0);
}
}
/* below here we're checking for goals. */
if (g_pongBall.y < 0) //score for player
{
PlayerScore(&g_player, 0);
}
else if (g_pongBall.y > DISPLAY_HEIGHT)
{
PlayerScore(&g_comp, 1);
}
}
void GameDoLogic(bool* Continue, bool* Error, Uint32 Milliseconds)
{
(void)Continue;
(void)Error;
if (Pause) return;
cpSpaceStep(space.Space, Milliseconds * 0.001);
CameraUpdate(&camera, PlayerMiddleY(), Milliseconds);
bool hasPlayers = false;
for (int i = 0; i < MAX_PLAYERS; i++)
{
Player *p = &players[i];
if (!p->Enabled) continue;
PlayerUpdate(p, Milliseconds);
// Check if the player needs to be respawned
if (p->RespawnCounter == 0 && !p->Alive && space.Gaps.size > 0)
{
SpaceRespawnPlayer(&space, p);
}
if (!p->Alive)
{
// Check if any players are past ones that await reenabling
if (p->RespawnCounter == -1 && PlayerMinY() < p->y)
{
PlayerRevive(p);
}
else
{
continue;
}
}
hasPlayers = true;
// Check player pickups
if (PickupsCollide(p->x, p->y, PLAYER_RADIUS))
{
PlayerScore(p, false);
}
// Players that hit the top of the screen die
if (cpBodyGetPosition(p->Body).y + PLAYER_RADIUS >=
camera.Y + FIELD_HEIGHT / 2)
{
PlayerKill(p);
}
}
// If no players left alive, end the game
if (!hasPlayers)
{
ToTitleScreen(false);
}
SpaceUpdate(&space, PlayerMinY(), camera.Y, PlayerMaxY(), &players[0]);
ParticlesUpdate(Milliseconds);
// Players that hit the top of the screen die
if (PlayerMaxY() + PLAYER_RADIUS >= camera.Y + FIELD_HEIGHT / 2)
{
ToTitleScreen(false);
}
}
static void HandleGameEvent(
const GameEvent e,
Camera *camera,
PowerupSpawner *healthSpawner,
CArray *ammoSpawners)
{
switch (e.Type)
{
case GAME_EVENT_PLAYER_DATA:
PlayerDataAddOrUpdate(e.u.PlayerData);
break;
case GAME_EVENT_TILE_SET:
{
Tile *t = MapGetTile(&gMap, Net2Vec2i(e.u.TileSet.Pos));
t->flags = e.u.TileSet.Flags;
t->pic = PicManagerGetNamedPic(
&gPicManager, e.u.TileSet.PicName);
t->picAlt = PicManagerGetNamedPic(
&gPicManager, e.u.TileSet.PicAltName);
}
break;
case GAME_EVENT_MAP_OBJECT_ADD:
ObjAdd(e.u.MapObjectAdd);
break;
case GAME_EVENT_MAP_OBJECT_DAMAGE:
DamageObject(e.u.MapObjectDamage);
break;
case GAME_EVENT_SCORE:
{
PlayerData *p = PlayerDataGetByUID(e.u.Score.PlayerUID);
PlayerScore(p, e.u.Score.Score);
HUDAddUpdate(
&camera->HUD,
NUMBER_UPDATE_SCORE, e.u.Score.PlayerUID, e.u.Score.Score);
}
break;
case GAME_EVENT_SOUND_AT:
if (!e.u.SoundAt.IsHit || ConfigGetBool(&gConfig, "Sound.Hits"))
{
SoundPlayAt(
&gSoundDevice,
StrSound(e.u.SoundAt.Sound), Net2Vec2i(e.u.SoundAt.Pos));
}
break;
case GAME_EVENT_SCREEN_SHAKE:
camera->shake = ScreenShakeAdd(
camera->shake, e.u.ShakeAmount,
ConfigGetInt(&gConfig, "Graphics.ShakeMultiplier"));
break;
case GAME_EVENT_SET_MESSAGE:
HUDDisplayMessage(
&camera->HUD, e.u.SetMessage.Message, e.u.SetMessage.Ticks);
break;
case GAME_EVENT_GAME_START:
gMission.HasStarted = true;
break;
case GAME_EVENT_ACTOR_ADD:
ActorAdd(e.u.ActorAdd);
break;
case GAME_EVENT_ACTOR_MOVE:
ActorMove(e.u.ActorMove);
break;
case GAME_EVENT_ACTOR_STATE:
{
TActor *a = ActorGetByUID(e.u.ActorState.UID);
if (!a->isInUse) break;
ActorSetState(a, (ActorAnimation)e.u.ActorState.State);
}
break;
case GAME_EVENT_ACTOR_DIR:
{
TActor *a = ActorGetByUID(e.u.ActorDir.UID);
if (!a->isInUse) break;
a->direction = (direction_e)e.u.ActorDir.Dir;
}
break;
case GAME_EVENT_ACTOR_SLIDE:
{
TActor *a = ActorGetByUID(e.u.ActorSlide.UID);
if (!a->isInUse) break;
a->Vel = Net2Vec2i(e.u.ActorSlide.Vel);
// Slide sound
if (ConfigGetBool(&gConfig, "Sound.Footsteps"))
{
SoundPlayAt(
&gSoundDevice,
gSoundDevice.slideSound,
Vec2iNew(a->tileItem.x, a->tileItem.y));
}
}
break;
case GAME_EVENT_ACTOR_IMPULSE:
{
TActor *a = ActorGetByUID(e.u.ActorImpulse.UID);
if (!a->isInUse) break;
a->Vel = Vec2iAdd(a->Vel, Net2Vec2i(e.u.ActorImpulse.Vel));
const Vec2i pos = Net2Vec2i(e.u.ActorImpulse.Pos);
if (!Vec2iIsZero(pos))
{
a->Pos = pos;
}
}
break;
case GAME_EVENT_ACTOR_SWITCH_GUN:
ActorSwitchGun(e.u.ActorSwitchGun);
break;
case GAME_EVENT_ACTOR_PICKUP_ALL:
{
TActor *a = ActorGetByUID(e.u.ActorPickupAll.UID);
if (!a->isInUse) break;
a->PickupAll = e.u.ActorPickupAll.PickupAll;
}
break;
case GAME_EVENT_ACTOR_REPLACE_GUN:
ActorReplaceGun(e.u.ActorReplaceGun);
break;
case GAME_EVENT_ACTOR_HEAL:
{
TActor *a = ActorGetByUID(e.u.Heal.UID);
if (!a->isInUse || a->dead) break;
ActorHeal(a, e.u.Heal.Amount);
// Sound of healing
SoundPlayAt(
&gSoundDevice,
gSoundDevice.healthSound, Vec2iFull2Real(a->Pos));
// Tell the spawner that we took a health so we can
// spawn more (but only if we're the server)
if (e.u.Heal.IsRandomSpawned && !gCampaign.IsClient)
{
PowerupSpawnerRemoveOne(healthSpawner);
}
if (e.u.Heal.PlayerUID >= 0)
{
HUDAddUpdate(
&camera->HUD, NUMBER_UPDATE_HEALTH,
e.u.Heal.PlayerUID, e.u.Heal.Amount);
}
}
break;
case GAME_EVENT_ACTOR_ADD_AMMO:
{
TActor *a = ActorGetByUID(e.u.AddAmmo.UID);
if (!a->isInUse || a->dead) break;
ActorAddAmmo(a, e.u.AddAmmo.AmmoId, e.u.AddAmmo.Amount);
// Tell the spawner that we took ammo so we can
// spawn more (but only if we're the server)
if (e.u.AddAmmo.IsRandomSpawned && !gCampaign.IsClient)
{
PowerupSpawnerRemoveOne(
CArrayGet(ammoSpawners, e.u.AddAmmo.AmmoId));
}
if (e.u.AddAmmo.PlayerUID >= 0)
{
HUDAddUpdate(
&camera->HUD, NUMBER_UPDATE_AMMO,
e.u.AddAmmo.PlayerUID, e.u.AddAmmo.Amount);
}
}
break;
case GAME_EVENT_ACTOR_USE_AMMO:
{
TActor *a = ActorGetByUID(e.u.UseAmmo.UID);
if (!a->isInUse || a->dead) break;
ActorAddAmmo(a, e.u.UseAmmo.AmmoId, -(int)e.u.UseAmmo.Amount);
if (e.u.UseAmmo.PlayerUID >= 0)
{
HUDAddUpdate(
&camera->HUD, NUMBER_UPDATE_AMMO,
e.u.UseAmmo.PlayerUID, -(int)e.u.UseAmmo.Amount);
}
}
break;
case GAME_EVENT_ACTOR_DIE:
{
TActor *a = ActorGetByUID(e.u.ActorDie.UID);
// Check if the player has lives to revive
PlayerData *p = PlayerDataGetByUID(a->PlayerUID);
if (p != NULL)
{
p->Lives--;
CASSERT(p->Lives >= 0, "Player has died too many times");
if (p->Lives > 0 && !gCampaign.IsClient)
{
// Find the closest player alive; try to spawn next to that position
// if no other suitable position exists
Vec2i defaultSpawnPosition = Vec2iZero();
const TActor *closestActor = AIGetClosestPlayer(a->Pos);
if (closestActor != NULL) defaultSpawnPosition = closestActor->Pos;
PlacePlayer(&gMap, p, defaultSpawnPosition, false);
}
}
ActorDestroy(a);
}
break;
case GAME_EVENT_ACTOR_MELEE:
{
const TActor *a = ActorGetByUID(e.u.Melee.UID);
if (!a->isInUse) break;
const BulletClass *b = StrBulletClass(e.u.Melee.BulletClass);
if ((HitType)e.u.Melee.HitType != HIT_NONE &&
HasHitSound(b->Power, a->flags, a->PlayerUID,
(TileItemKind)e.u.Melee.TargetKind, e.u.Melee.TargetUID,
SPECIAL_NONE, false))
{
PlayHitSound(
&b->HitSound, (HitType)e.u.Melee.HitType,
Vec2iFull2Real(a->Pos));
}
if (!gCampaign.IsClient)
{
Damage(
Vec2iZero(),
b->Power,
a->flags, a->PlayerUID, a->uid,
(TileItemKind)e.u.Melee.TargetKind, e.u.Melee.TargetUID,
SPECIAL_NONE);
}
}
break;
case GAME_EVENT_ADD_PICKUP:
PickupAdd(e.u.AddPickup);
// Play a spawn sound
SoundPlayAt(
&gSoundDevice,
StrSound("spawn_item"), Net2Vec2i(e.u.AddPickup.Pos));
break;
case GAME_EVENT_REMOVE_PICKUP:
PickupDestroy(e.u.RemovePickup.UID);
if (e.u.RemovePickup.SpawnerUID >= 0)
{
TObject *o = ObjGetByUID(e.u.RemovePickup.SpawnerUID);
o->counter = AMMO_SPAWNER_RESPAWN_TICKS;
}
break;
case GAME_EVENT_BULLET_BOUNCE:
{
TMobileObject *o = MobObjGetByUID(e.u.BulletBounce.UID);
if (o == NULL || !o->isInUse) break;
const Vec2i pos = Net2Vec2i(e.u.BulletBounce.BouncePos);
PlayHitSound(
&o->bulletClass->HitSound, (HitType)e.u.BulletBounce.HitType,
Vec2iFull2Real(pos));
if (e.u.BulletBounce.Spark && o->bulletClass->Spark != NULL)
{
GameEvent s = GameEventNew(GAME_EVENT_ADD_PARTICLE);
s.u.AddParticle.Class = o->bulletClass->Spark;
s.u.AddParticle.FullPos = pos;
s.u.AddParticle.Z = o->z;
GameEventsEnqueue(&gGameEvents, s);
}
o->x = pos.x;
o->y = pos.y;
o->vel = Net2Vec2i(e.u.BulletBounce.BounceVel);
}
break;
case GAME_EVENT_REMOVE_BULLET:
{
TMobileObject *o = MobObjGetByUID(e.u.RemoveBullet.UID);
if (o == NULL || !o->isInUse) break;
MobObjDestroy(o);
}
break;
case GAME_EVENT_PARTICLE_REMOVE:
ParticleDestroy(&gParticles, e.u.ParticleRemoveId);
break;
case GAME_EVENT_GUN_FIRE:
{
const GunDescription *g = StrGunDescription(e.u.GunFire.Gun);
const Vec2i fullPos = Net2Vec2i(e.u.GunFire.MuzzleFullPos);
// Add bullets
if (g->Bullet && !gCampaign.IsClient)
{
// Find the starting angle of the spread (clockwise)
// Keep in mind the fencepost problem, i.e. spread of 3 means a
// total spread angle of 2x width
const double spreadStartAngle =
g->AngleOffset -
(g->Spread.Count - 1) * g->Spread.Width / 2;
for (int i = 0; i < g->Spread.Count; i++)
{
const double recoil =
((double)rand() / RAND_MAX * g->Recoil) -
g->Recoil / 2;
const double finalAngle =
e.u.GunFire.Angle + spreadStartAngle +
i * g->Spread.Width + recoil;
GameEvent ab = GameEventNew(GAME_EVENT_ADD_BULLET);
ab.u.AddBullet.UID = MobObjsObjsGetNextUID();
strcpy(ab.u.AddBullet.BulletClass, g->Bullet->Name);
ab.u.AddBullet.MuzzlePos = Vec2i2Net(fullPos);
ab.u.AddBullet.MuzzleHeight = e.u.GunFire.Z;
ab.u.AddBullet.Angle = (float)finalAngle;
ab.u.AddBullet.Elevation =
RAND_INT(g->ElevationLow, g->ElevationHigh);
ab.u.AddBullet.Flags = e.u.GunFire.Flags;
ab.u.AddBullet.PlayerUID = e.u.GunFire.PlayerUID;
ab.u.AddBullet.ActorUID = e.u.GunFire.UID;
GameEventsEnqueue(&gGameEvents, ab);
}
}
// Add muzzle flash
if (GunHasMuzzle(g))
{
GameEvent ap = GameEventNew(GAME_EVENT_ADD_PARTICLE);
ap.u.AddParticle.Class = g->MuzzleFlash;
ap.u.AddParticle.FullPos = fullPos;
ap.u.AddParticle.Z = e.u.GunFire.Z;
ap.u.AddParticle.Angle = e.u.GunFire.Angle;
GameEventsEnqueue(&gGameEvents, ap);
}
// Sound
if (e.u.GunFire.Sound && g->Sound)
{
SoundPlayAt(&gSoundDevice, g->Sound, Vec2iFull2Real(fullPos));
}
// Screen shake
if (g->ShakeAmount > 0)
{
GameEvent s = GameEventNew(GAME_EVENT_SCREEN_SHAKE);
s.u.ShakeAmount = g->ShakeAmount;
GameEventsEnqueue(&gGameEvents, s);
}
// Brass shells
// If we have a reload lead, defer the creation of shells until then
if (g->Brass && g->ReloadLead == 0)
{
const direction_e d = RadiansToDirection(e.u.GunFire.Angle);
const Vec2i muzzleOffset = GunGetMuzzleOffset(g, d);
GunAddBrass(g, d, Vec2iMinus(fullPos, muzzleOffset));
}
}
break;
case GAME_EVENT_GUN_RELOAD:
{
const GunDescription *g = StrGunDescription(e.u.GunReload.Gun);
const Vec2i fullPos = Net2Vec2i(e.u.GunReload.FullPos);
SoundPlayAtPlusDistance(
&gSoundDevice,
g->ReloadSound,
Vec2iFull2Real(fullPos),
RELOAD_DISTANCE_PLUS);
// Brass shells
if (g->Brass)
{
GunAddBrass(g, (direction_e)e.u.GunReload.Direction, fullPos);
}
}
break;
case GAME_EVENT_GUN_STATE:
{
const TActor *a = ActorGetByUID(e.u.GunState.ActorUID);
if (!a->isInUse) break;
WeaponSetState(ActorGetGun(a), (gunstate_e)e.u.GunState.State);
}
break;
case GAME_EVENT_ADD_BULLET:
BulletAdd(e.u.AddBullet);
break;
case GAME_EVENT_ADD_PARTICLE:
ParticleAdd(&gParticles, e.u.AddParticle);
break;
case GAME_EVENT_ACTOR_HIT:
{
TActor *a = ActorGetByUID(e.u.ActorHit.UID);
if (!a->isInUse) break;
ActorTakeHit(a, e.u.ActorHit.Special);
if (e.u.ActorHit.Power > 0)
{
DamageActor(
a, e.u.ActorHit.Power, e.u.ActorHit.HitterPlayerUID);
if (e.u.ActorHit.PlayerUID >= 0)
{
HUDAddUpdate(
&camera->HUD, NUMBER_UPDATE_HEALTH,
e.u.ActorHit.PlayerUID, -e.u.ActorHit.Power);
}
AddBloodSplatter(
a->Pos, e.u.ActorHit.Power,
Net2Vec2i(e.u.ActorHit.Vel));
}
}
break;
case GAME_EVENT_TRIGGER:
{
const Tile *t =
MapGetTile(&gMap, Net2Vec2i(e.u.TriggerEvent.Tile));
CA_FOREACH(Trigger *, tp, t->triggers)
if ((*tp)->id == (int)e.u.TriggerEvent.ID)
{
TriggerActivate(*tp, &gMap.triggers);
break;
}
CA_FOREACH_END()
}
break;
case GAME_EVENT_EXPLORE_TILES:
// Process runs of explored tiles
for (int i = 0; i < (int)e.u.ExploreTiles.Runs_count; i++)
{
Vec2i tile = Net2Vec2i(e.u.ExploreTiles.Runs[i].Tile);
for (int j = 0; j < e.u.ExploreTiles.Runs[i].Run; j++)
{
MapMarkAsVisited(&gMap, tile);
tile.x++;
if (tile.x == gMap.Size.x)
{
tile.x = 0;
tile.y++;
}
}
}
break;
case GAME_EVENT_RESCUE_CHARACTER:
{
TActor *a = ActorGetByUID(e.u.Rescue.UID);
if (!a->isInUse) break;
a->flags &= ~FLAGS_PRISONER;
SoundPlayAt(
&gSoundDevice, StrSound("rescue"), Vec2iFull2Real(a->Pos));
}
break;
case GAME_EVENT_OBJECTIVE_UPDATE:
{
ObjectiveDef *o = CArrayGet(
&gMission.Objectives, e.u.ObjectiveUpdate.ObjectiveId);
o->done += e.u.ObjectiveUpdate.Count;
// Display a text update effect for the objective
HUDAddUpdate(
&camera->HUD, NUMBER_UPDATE_OBJECTIVE,
e.u.ObjectiveUpdate.ObjectiveId, e.u.ObjectiveUpdate.Count);
MissionSetMessageIfComplete(&gMission);
}
break;
case GAME_EVENT_ADD_KEYS:
gMission.KeyFlags |= e.u.AddKeys.KeyFlags;
SoundPlayAt(
&gSoundDevice, gSoundDevice.keySound, Net2Vec2i(e.u.AddKeys.Pos));
// Clear cache since we may now have new paths
PathCacheClear(&gPathCache);
break;
case GAME_EVENT_MISSION_COMPLETE:
if (e.u.MissionComplete.ShowMsg)
{
HUDDisplayMessage(&camera->HUD, "Mission complete", -1);
}
camera->HUD.showExit = true;
MapShowExitArea(&gMap);
break;
case GAME_EVENT_MISSION_INCOMPLETE:
gMission.state = MISSION_STATE_PLAY;
break;
case GAME_EVENT_MISSION_PICKUP:
gMission.state = MISSION_STATE_PICKUP;
gMission.pickupTime = gMission.time;
SoundPlay(&gSoundDevice, StrSound("whistle"));
break;
case GAME_EVENT_MISSION_END:
gMission.isDone = true;
break;
default:
assert(0 && "unknown game event");
break;
}
}