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feat: add CheckInteractDistance for proximity-based addon checks

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Returns true if the player is within interaction distance of a unit:
- Index 1: Inspect range (28 yards)
- Index 2: Trade range (11 yards)
- Index 3: Duel range (10 yards)
- Index 4: Follow range (28 yards)

Used by trade addons, inspect addons, and proximity detection addons.
This commit is contained in:
Kelsi 2026-03-21 12:33:39 -07:00
parent 42b776dbf8
commit c836b421fc
1 changed files with 30 additions and 0 deletions
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30
src/addons/lua_engine.cpp
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@ -540,6 +540,35 @@ static int lua_UnitDetailedThreatSituation(lua_State* L) {
return 5;
}
// CheckInteractDistance(unit, distIndex) → boolean
// distIndex: 1=inspect(28yd), 2=trade(11yd), 3=duel(10yd), 4=follow(28yd)
static int lua_CheckInteractDistance(lua_State* L) {
auto* gh = getGameHandler(L);
if (!gh) { lua_pushboolean(L, 0); return 1; }
const char* uid = luaL_checkstring(L, 1);
int distIdx = static_cast<int>(luaL_optnumber(L, 2, 4));
std::string uidStr(uid);
for (char& c : uidStr) c = static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
uint64_t guid = resolveUnitGuid(gh, uidStr);
if (guid == 0) { lua_pushboolean(L, 0); return 1; }
auto targetEnt = gh->getEntityManager().getEntity(guid);
auto playerEnt = gh->getEntityManager().getEntity(gh->getPlayerGuid());
if (!targetEnt || !playerEnt) { lua_pushboolean(L, 0); return 1; }
float dx = playerEnt->getX() - targetEnt->getX();
float dy = playerEnt->getY() - targetEnt->getY();
float dz = playerEnt->getZ() - targetEnt->getZ();
float dist = std::sqrt(dx*dx + dy*dy + dz*dz);
float maxDist = 28.0f; // default: follow/inspect range
switch (distIdx) {
case 1: maxDist = 28.0f; break; // inspect
case 2: maxDist = 11.11f; break; // trade
case 3: maxDist = 9.9f; break; // duel
case 4: maxDist = 28.0f; break; // follow
}
lua_pushboolean(L, dist <= maxDist);
return 1;
}
// IsSpellInRange(spellName, unit) → 0 or 1 (nil if can't determine)
static int lua_IsSpellInRange(lua_State* L) {
auto* gh = getGameHandler(L);
@ -3415,6 +3444,7 @@ void LuaEngine::registerCoreAPI() {
{"GetSpellCooldown", lua_GetSpellCooldown},
{"GetSpellPowerCost", lua_GetSpellPowerCost},
{"IsSpellInRange", lua_IsSpellInRange},
{"CheckInteractDistance", lua_CheckInteractDistance},
{"HasTarget", lua_HasTarget},
{"TargetUnit", lua_TargetUnit},
{"ClearTarget", lua_ClearTarget},