/**
* @brief Test if point is "visible" from team.
* @param[in] team A team to test.
* @param[in] point A point to check.
* @return true if point is "visible"
*/
static bool G_TeamPointVis (int team, const vec3_t point)
{
Edict *from = nullptr;
vec3_t eye;
/* test if point is visible from team */
while ((from = G_EdictsGetNextLivingActorOfTeam(from, team))) {
if (G_FrustumVis(from, point)) {
/* get viewers eye height */
G_ActorGetEyeVector(from, eye);
/* line of sight */
if (!G_TestLine(eye, point)) {
const float distance = VectorDist(from->origin, point);
bool blocked = false;
/* check visibility in the smoke */
if (distance >= UNIT_SIZE) {
Edict *e = nullptr;
while ((e = G_EdictsGetNextInUse(e))) {
if (G_IsSmoke(e) && RayIntersectAABB(eye, point, e->absmin, e->absmax)) {
blocked = true;
break;
}
}
}
if (!blocked)
return true;
}
}
}
/* not visible */
return false;
}
/**
* @brief test if check is visible by from
* @param[in] team Living team members are always visible. If this is a negative
* number we inverse the team rules (see comments included). In combination with VT_NOFRUSTUM
* we can check whether there is any edict (that is no in our team) that can see @c check
* @param[in] from is from team @c team and must be a living actor
* @param[in] check The edict we want to get the visibility for
* @param[in] flags @c VT_NOFRUSTUM, ...
*/
bool G_Vis (const int team, const Edict* from, const Edict* check, const vischeckflags_t flags)
{
vec3_t eye;
/* if any of them isn't in use, then they're not visible */
if (!from->inuse || !check->inuse)
return false;
/* only actors and 2x2 units can see anything */
if (!G_IsLivingActor(from) && !G_IsActiveCamera(from))
return false;
/* living team members are always visible */
if (team >= 0 && check->getTeam() == team && !G_IsDead(check))
return true;
/* standard team rules */
if (team >= 0 && from->getTeam() != team)
return false;
/* inverse team rules */
if (team < 0 && check->getTeam() == -team)
return false;
/* check for same pos */
if (VectorCompare(from->pos, check->pos))
return true;
if (!G_IsVisibleOnBattlefield(check))
return false;
/* view distance check */
const int spotDist = G_VisCheckDist(from);
if (VectorDistSqr(from->origin, check->origin) > spotDist * spotDist)
return false;
/* view frustum check */
if (!(flags & VT_NOFRUSTUM) && !G_FrustumVis(from, check->origin))
return false;
/* get viewers eye height */
G_ActorGetEyeVector(from, eye);
/* line trace check */
switch (check->type) {
case ET_ACTOR:
case ET_ACTOR2x2:
return G_ActorVis(eye, from, check, false) > ACTOR_VIS_0;
case ET_ITEM:
case ET_CAMERA:
case ET_PARTICLE:
return !G_LineVis(eye, check->origin);
default:
return false;
}
}
/**
* @brief calculate how much check is "visible" from @c from
* @param[in] from The world coordinate to check from
* @param[in] ent The source edict of the check
* @param[in] check The edict to check how good (or if at all) it is visible
* @param[in] full Perform a full check in different directions. If this is
* @c false the actor is fully visible if one vis check returned @c true. With
* @c true this function can also return a value != 0.0 and != 1.0. Try to only
* use @c true if you really need the full check. Full checks are of course
* more expensive.
* @return a value between 0.0 and 1.0 which reflects the visibility from 0
* to 100 percent
* @note This call isn't cheap - try to do this only if you really need the
* visibility check or the statement whether one particular actor see another
* particular actor.
* @sa CL_ActorVis
*/
float G_ActorVis (const vec3_t from, const edict_t *ent, const edict_t *check, bool full)
{
vec3_t test, dir;
float delta;
int i, n;
const float distance = VectorDist(check->origin, ent->origin);
/* units that are very close are visible in the smoke */
if (distance > UNIT_SIZE * 1.5f) {
vec3_t eyeEnt;
edict_t *e = NULL;
G_ActorGetEyeVector(ent, eyeEnt);
while ((e = G_EdictsGetNext(e))) {
if (G_IsSmoke(e)) {
if (RayIntersectAABB(eyeEnt, check->absmin, e->absmin, e->absmax)
|| RayIntersectAABB(eyeEnt, check->absmax, e->absmin, e->absmax)) {
return ACTOR_VIS_0;
}
}
}
}
/* start on eye height */
VectorCopy(check->origin, test);
if (G_IsDead(check)) {
test[2] += PLAYER_DEAD;
delta = 0;
} else if (G_IsCrouched(check)) {
test[2] += PLAYER_CROUCH - 2;
delta = (PLAYER_CROUCH - PLAYER_MIN) / 2 - 2;
} else {
test[2] += PLAYER_STAND;
delta = (PLAYER_STAND - PLAYER_MIN) / 2 - 2;
}
/* side shifting -> better checks */
dir[0] = from[1] - check->origin[1];
dir[1] = check->origin[0] - from[0];
dir[2] = 0;
VectorNormalizeFast(dir);
VectorMA(test, -7, dir, test);
/* do 3 tests */
n = 0;
for (i = 0; i < 3; i++) {
if (!G_LineVis(from, test)) {
if (full)
n++;
else
return ACTOR_VIS_100;
}
/* look further down or stop */
if (!delta) {
if (n > 0)
return ACTOR_VIS_100;
else
return ACTOR_VIS_0;
}
VectorMA(test, 7, dir, test);
test[2] -= delta;
}
/* return factor */
switch (n) {
case 0:
return ACTOR_VIS_0;
case 1:
return ACTOR_VIS_10;
case 2:
return ACTOR_VIS_50;
default:
return ACTOR_VIS_100;
}
}
/**
* @brief Deals splash damage to a target and its surroundings.
* @param[in] ent The shooting actor
* @param[in] fd The fire definition that defines what type of damage is dealt and how big the splash radius is.
* @param[in] impact The impact vector where the grenade is exploding
* @param[in,out] mock pseudo shooting - only for calculating mock values - nullptr for real shots
* @param[in] tr The trace where the grenade hits something (or not)
*/
static void G_SplashDamage (Actor* ent, const fireDef_t* fd, vec3_t impact, shot_mock_t* mock, const trace_t* tr)
{
assert(fd->splrad > 0.0f);
const bool shock = (fd->obj->dmgtype == gi.csi->damShock);
Edict* check = nullptr;
while ((check = G_EdictsGetNextInUse(check))) {
/* If we use a blinding weapon we skip the target if it's looking
* away from the impact location. */
if (shock && !G_FrustumVis(check, impact))
continue;
const bool isActor = G_IsLivingActor(check);
vec3_t center;
if (G_IsBrushModel(check) && G_IsBreakable(check))
check->absBox.getCenter(center);
else if (isActor || G_IsBreakable(check))
VectorCopy(check->origin, center);
else
continue;
/* check for distance */
float dist = VectorDist(impact, center);
dist = dist > UNIT_SIZE / 2 ? dist - UNIT_SIZE / 2 : 0.0f;
if (dist > fd->splrad)
continue;
if (fd->irgoggles) {
if (isActor) {
/* check whether this actor (check) is in the field of view of the 'shooter' (ent) */
if (G_FrustumVis(ent, check->origin)) {
if (!mock) {
vec3_t eyeEnt;
G_ActorGetEyeVector(ent, eyeEnt);
if (!G_SmokeVis(eyeEnt, check)) {
const unsigned int playerMask = G_TeamToPM(ent->getTeam()) ^ G_VisToPM(check->visflags);
G_AppearPerishEvent(playerMask, true, *check, ent);
G_VisFlagsAdd(*check, G_PMToVis(playerMask));
}
}
}
}
continue;
}
/* check for walls */
if (isActor && G_TestLine(impact, check->origin))
continue;
/* do damage */
const int damage = shock ? 0 : fd->spldmg[0] * (1.0f - dist / fd->splrad);
if (mock)
mock->allow_self = true;
/* Send hurt sounds for actors, but only if they'll recieve damage from this attack */
if (G_Damage(check, fd, damage, ent, mock, nullptr) && isActor
&& (G_ApplyProtection(check, fd->dmgweight, damage) > 0) && !shock) {
const teamDef_t* teamDef = check->chr.teamDef;
const int gender = check->chr.gender;
const char* sound = teamDef->getActorSound(gender, SND_HURT);
G_EventSpawnSound(G_VisToPM(check->visflags), *check, nullptr, sound);
}
if (mock)
mock->allow_self = false;
}
/** @todo splash might also hit other surfaces and the trace doesn't handle that */
if (tr && G_FireAffectedSurface(tr->surface, fd)) {
/* move a little away from the impact vector */
VectorMA(impact, 1, tr->plane.normal, impact);
G_SpawnParticle(impact, tr->contentFlags >> 8, "burning");
}
/**
* @brief calculate how much check is "visible" by @c ent
* @param[in] ent The source edict of the check
* @param[in] check The edict to check how good (or if at all) it is visible
* @param[in] full Perform a full check in different directions. If this is
* @c false the actor is fully visible if one vis check returned @c true. With
* @c true this function can also return a value != 0.0 and != 1.0. Try to only
* use @c true if you really need the full check. Full checks are of course
* more expensive.
* @return a value between 0.0 and 1.0 (one of the ACTOR_VIS_* constants) which
* reflects the visibility from 0 to 100 percent
* @note This call isn't cheap - try to do this only if you really need the
* visibility check or the statement whether one particular actor see another
* particular actor.
* @sa CL_ActorVis
*/
float G_ActorVis (const Edict* ent, const Edict* check, bool full)
{
vec3_t eyeEnt;
G_ActorGetEyeVector(ent, eyeEnt);
if (G_SmokeVis(eyeEnt, check))
return ACTOR_VIS_0;
vec3_t test, dir;
float delta;
/* start on eye height */
VectorCopy(check->origin, test);
if (G_IsDead(check)) {
test[2] += PLAYER_DEAD;
delta = 0;
} else if (G_IsCrouched(check)) {
test[2] += PLAYER_CROUCH - 2;
delta = (PLAYER_CROUCH - PLAYER_MIN) / 2 - 2;
} else {
test[2] += PLAYER_STAND;
delta = (PLAYER_STAND - PLAYER_MIN) / 2 - 2;
}
/* side shifting -> better checks */
dir[0] = eyeEnt[1] - check->origin[1];
dir[1] = check->origin[0] - eyeEnt[0];
dir[2] = 0;
VectorNormalizeFast(dir);
VectorMA(test, -7, dir, test);
/* do 3 tests */
int n = 0;
for (int i = 0; i < 3; i++) {
if (!G_LineVis(eyeEnt, test)) {
if (full)
n++;
else
return ACTOR_VIS_100;
}
/* look further down or stop */
if (!delta) {
if (n > 0)
return ACTOR_VIS_100;
else
return ACTOR_VIS_0;
}
VectorMA(test, 7, dir, test);
test[2] -= delta;
}
/* return factor */
switch (n) {
case 0:
return ACTOR_VIS_0;
case 1:
return ACTOR_VIS_10;
case 2:
return ACTOR_VIS_50;
default:
return ACTOR_VIS_100;
}
}
