auto q = center - start;
auto v = q.DotProduct(direction);
auto d = radius * radius - (q.LengthSqr() - v * v);

if (d < FLT_EPSILON) return {}; return start + direction * (v - std::sqrt(d)); }; auto delta = (maxs - mins).Normalize(); for (size_t i{}; i < std::floor(mins.Dist(maxs)); ++i) { if (auto intersection = sphereRayIntersection(mins + delta * float(i)); intersection) return intersection; } if (auto intersection = sphereRayIntersection(maxs); intersection) return intersection; return {}; } static std::optional GetTargetRecord(CEntity* entity, const Vector& start, const Vector& end)
{
auto hdr = Interfaces::ModelInfo->GetStudioModel(entity->GetModel());
if (!hdr)
return {};

auto set = hdr->GetHitboxSet(0);
if (!set)
return {};

for (auto& record : LagCompensation.GetRecordsForEntity(entity))
{
for (size_t i{}; i < set->numhitboxes; ++i)
{
auto hitbox = set->GetHitbox(i);
if (!hitbox || hitbox->radius == -1.f)
continue;

Vector mins, maxs;
VectorTransform(hitbox->bbmin, record.matrix[hitbox->bone], mins);
VectorTransform(hitbox->bbmax, record.matrix[hitbox->bone], maxs);

if (auto intersection = GetIntersectionPoint(start, end, mins, maxs, hitbox->radius); intersection)
{
Ray_t ray;
CGameTrace trace;
CTraceFilter filter;

filter.pSkip = CEntity::GetLocalPlayer();
ray.Init(start, *intersection);

Interfaces::Trace->TraceRay(ray, MASK_SHOT | CONTENTS_GRATE, &filter, &trace);
if (!trace.DidHit()) //position isn't behind wall
return record;
}
}
}

return {};
}

void BacktrackTrigger(CUserCmd* cmd)
{
auto local = CEntity::GetLocalPlayer();
auto weapon = local->GetWeapon();
auto data = weapon->GetWeaponData();

Vector viewangles;
Vector start = local->GetEyePos();
Vector end;

Interfaces::Engine->GetViewAngles(viewangles);

AngleVectors(viewangles + local->GetAimPunch(), &end);
end = start + (end * data->range);

for (size_t i{}; i <= Interfaces::GlobalVars->maxClients; ++i)
{
auto entity = Interfaces::EntityList->GetClientEntity(i);
if (!entity || !entity->IsEnemy() || !entity->GetHealth() || entity->IsDormant() || entity->IsImmune())
continue;

if (auto record = GetTargetRecord(entity, start, end); record)
{
if (!data->full_auto)
{
if (cmd->tick_count % 2) cmd->buttons |= IN_ATTACK;
else cmd->buttons &= ~IN_ATTACK;
}
else cmd->buttons |= IN_ATTACK;

//backtrack your target entity