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Spawn shards on UFO Catcher glass damage

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Involves some code adapted from monitor.c ... I couldn't just expose it via k_object.h because the clean entrypoint was JUST too specific to Monitors
This commit is contained in:
toaster 2023-04-07 22:36:32 +01:00
parent 03049db837
commit 6108aa3dd6
1 changed files with 93 additions and 3 deletions
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96
src/objects/ufo.c
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@ -517,6 +517,90 @@ void Obj_SpecialUFOThinker(mobj_t *ufo)
}
}
// The following is adapted from monitor.c for UFO Catcher damage
// I couldn't just exose the relevant things via k_object.h
// because they're *just* too specific to Monitors... ~toast 070423
#define shard_can_roll(o) ((o)->extravalue1)
static inline boolean
can_shard_state_roll (statenum_t state)
{
switch (state)
{
case S_MONITOR_BIG_SHARD:
case S_MONITOR_SMALL_SHARD:
return true;
default:
return false;
}
}
static void
spawn_shard
( mobj_t * part,
statenum_t state)
{
mobj_t *ufo = ufo_piece_owner(part);
// These divisions and multiplications are done on the
// offsets to give bigger increments of randomness.
const fixed_t h = FixedDiv(
ufo->height, ufo->scale);
const UINT16 rad = (ufo->radius / ufo->scale) / 4;
const UINT16 tall = (h / FRACUNIT);
mobj_t *p = P_SpawnMobjFromMobj(ufo,
P_RandomRange(PR_ITEM_DEBRIS, -(rad), rad) * 8 * FRACUNIT,
P_RandomRange(PR_ITEM_DEBRIS, -(rad), rad) * 8 * FRACUNIT,
P_RandomKey(PR_ITEM_DEBRIS, tall + 1) * 4 * FRACUNIT,
MT_MONITOR_SHARD);
P_SetScale(p, (p->destscale = p->destscale * 3));
angle_t th = R_PointToAngle2(ufo->x, ufo->y, p->x, p->y);
th -= P_RandomKey(PR_ITEM_DEBRIS, ANGLE_45) - ANGLE_22h;
p->hitlag = 0;
P_Thrust(p, th, 6 * p->scale);
p->momz = P_RandomRange(PR_ITEM_DEBRIS, 3, 10) * p->scale;
P_SetMobjState(p, state);
shard_can_roll(p) = can_shard_state_roll(state);
if (shard_can_roll(p))
{
p->rollangle = P_Random(PR_ITEM_DEBRIS);
}
if (P_RandomChance(PR_ITEM_DEBRIS, FRACUNIT/2))
{
p->renderflags |= RF_DONTDRAW;
}
}
static void
spawn_debris (mobj_t *part)
{
mobj_t *ufo = ufo_piece_owner(part);
INT32 i;
for (i = ufo->health;
i <= mobjinfo[ufo->type].spawnhealth; i += 5)
{
spawn_shard(part, S_MONITOR_BIG_SHARD);
spawn_shard(part, S_MONITOR_SMALL_SHARD);
spawn_shard(part, S_MONITOR_TWINKLE);
}
}
static void UFOCopyHitlagToPieces(mobj_t *ufo)
{
mobj_t *piece = NULL;
@ -526,6 +610,12 @@ static void UFOCopyHitlagToPieces(mobj_t *ufo)
{
piece->hitlag = ufo->hitlag;
piece->eflags = (piece->eflags & ~MFE_DAMAGEHITLAG) | (ufo->eflags & MFE_DAMAGEHITLAG);
if (ufo_piece_type(piece) == UFO_PIECE_TYPE_GLASS)
{
spawn_debris (piece);
}
piece = ufo_piece_next(piece);
}
}
@ -691,15 +781,16 @@ boolean Obj_SpecialUFODamage(mobj_t *ufo, mobj_t *inflictor, mobj_t *source, UIN
// Speed up on damage!
ufo_speed(ufo) += addSpeed;
ufo->health = max(1, ufo->health - damage);
K_SetHitLagForObjects(ufo, inflictor, (damage / 3) + 2, true);
UFOCopyHitlagToPieces(ufo);
if (damage >= ufo->health - 1)
if (ufo->health == 1)
{
// Destroy the UFO parts, and make the emerald collectible!
UFOKillPieces(ufo);
ufo->health = 1;
ufo->flags = (ufo->flags & ~MF_SHOOTABLE) | (MF_SPECIAL|MF_PICKUPFROMBELOW);
ufo->shadowscale = FRACUNIT/3;
@ -716,7 +807,6 @@ boolean Obj_SpecialUFODamage(mobj_t *ufo, mobj_t *inflictor, mobj_t *source, UIN
S_StartSound(ufo, sfx_clawht);
S_StopSoundByID(ufo, sfx_clawzm);
P_StartQuake(64<<FRACBITS, 10);
ufo->health -= damage;
return true;
}