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- /*
- Minetest
- Copyright (C) 2018 numZero, Lobachevsky Vitaly <numzer0@yandex.com>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "serveractiveobjectmap.h"
- #include <cmath>
- #include "constants.h"
- #include "log.h"
- #include "serverobject.h"
- static constexpr float granularity = 16.0 * BS;
- static v3s16 getChunkPos(const v3f &pos)
- {
- return v3s16(
- std::floor(pos.X / granularity),
- std::floor(pos.Y / granularity),
- std::floor(pos.Z / granularity));
- }
- static aabb3s16 calcBox(const aabb3f &cb)
- {
- return { getChunkPos(cb.MinEdge), getChunkPos(cb.MaxEdge) };
- }
- void ServerActiveObjectMap::addObject(ServerActiveObject *object)
- {
- aabb3f cb;
- Wrapper w;
- u16 id = object->getId();
- if (!isFreeId(id))
- throw std::logic_error("ServerActiveObjectMap::addObject: "
- "object ID in use: " + std::to_string(id));
- w.object = object;
- w.has_box = w.object->getCollisionBox(&cb);
- w.pos = getChunkPos(w.object->getBasePosition());
- if (w.has_box) {
- w.box = calcBox(cb);
- addObjectRefs(id, w.box);
- }
- addObjectRef(id, w.pos);
- objects.emplace(id, w);
- }
- ServerActiveObject *ServerActiveObjectMap::removeObject(u16 id)
- {
- auto pw = objects.find(id);
- if (pw == objects.end())
- return nullptr; // silently ignore non-existent object
- Wrapper w = pw->second;
- if (w.has_box)
- removeObjectRefs(id, w.box);
- removeObjectRef(id, w.pos);
- objects.erase(pw);
- return w.object;
- }
- void ServerActiveObjectMap::removeObject(ServerActiveObject *object)
- {
- removeObject(object->getId());
- }
- void ServerActiveObjectMap::updateObject(u16 id)
- {
- auto pw = objects.find(id);
- if (pw == objects.end()) {
- warningstream << "Trying to update non-existent object: " << id
- << std::endl;
- return;
- }
- Wrapper &w = pw->second;
- v3s16 pos = getChunkPos(w.object->getBasePosition());
- aabb3f cb;
- aabb3s16 box;
- bool has_box = w.object->getCollisionBox(&cb);
- if (has_box)
- box = calcBox(cb);
- if (w.has_box && has_box && w.box == box && pos == w.pos)
- return;
- if (w.has_box)
- removeObjectRefs(id, w.box);
- removeObjectRef(id, w.pos);
- w.box = box;
- w.has_box = has_box;
- if (w.has_box)
- addObjectRefs(id, w.box);
- addObjectRef(id, w.pos);
- }
- void ServerActiveObjectMap::updateObject(ServerActiveObject *object)
- {
- updateObject(object->getId());
- }
- ServerActiveObject *ServerActiveObjectMap::getObject(u16 id) const
- {
- auto pw = objects.find(id);
- if (pw == objects.end())
- return nullptr;
- return pw->second.object;
- }
- std::vector<u16> ServerActiveObjectMap::getObjectsInsideRadius(v3f pos, float radius)
- {
- std::vector<u16> result;
- auto nearby = getObjectsNearBox(calcBox({pos - radius, pos + radius}));
- for (auto &id : nearby) {
- ServerActiveObject *obj = getObject(id);
- v3f objectpos = obj->getBasePosition();
- if (objectpos.getDistanceFrom(pos) > radius)
- continue;
- result.push_back(id);
- }
- return result;
- }
- std::vector<u16> ServerActiveObjectMap::getObjectsTouchingBox(const aabb3f &box)
- {
- std::vector<u16> result;
- auto nearby = getObjectsNearBox(calcBox(box));
- for (auto &id : nearby) {
- ServerActiveObject *obj = getObject(id);
- aabb3f cb;
- if (!obj->getCollisionBox(&cb))
- continue;
- if (!box.intersectsWithBox(cb))
- continue;
- result.push_back(id);
- }
- return result;
- }
- std::unordered_set<u16> ServerActiveObjectMap::getObjectsNearBox(const aabb3s16 &box)
- {
- std::unordered_set<u16> result;
- v3s16 p;
- for (p.Z = box.MinEdge.Z; p.Z <= box.MaxEdge.Z; p.Z++)
- for (p.Y = box.MinEdge.Y; p.Y <= box.MaxEdge.Y; p.Y++)
- for (p.X = box.MinEdge.X; p.X <= box.MaxEdge.X; p.X++) {
- auto bounds = refmap.equal_range(p);
- for (auto iter = bounds.first; iter != bounds.second; ++iter)
- result.insert(iter->second);
- }
- return result;
- }
- void ServerActiveObjectMap::addObjectRef(u16 id, v3s16 pos)
- {
- refmap.emplace(pos, id);
- }
- void ServerActiveObjectMap::removeObjectRef(u16 id, v3s16 pos)
- {
- auto bounds = refmap.equal_range(pos);
- for (auto iter = bounds.first; iter != bounds.second;) {
- if (iter->second == id)
- iter = refmap.erase(iter);
- else
- ++iter;
- }
- }
- void ServerActiveObjectMap::addObjectRefs(u16 id, const aabb3s16 &box)
- {
- v3s16 p;
- for (p.Z = box.MinEdge.Z; p.Z <= box.MaxEdge.Z; p.Z++)
- for (p.Y = box.MinEdge.Y; p.Y <= box.MaxEdge.Y; p.Y++)
- for (p.X = box.MinEdge.X; p.X <= box.MaxEdge.X; p.X++)
- addObjectRef(id, p);
- }
- void ServerActiveObjectMap::removeObjectRefs(u16 id, const aabb3s16 &box)
- {
- v3s16 p;
- for (p.Z = box.MinEdge.Z; p.Z <= box.MaxEdge.Z; p.Z++)
- for (p.Y = box.MinEdge.Y; p.Y <= box.MaxEdge.Y; p.Y++)
- for (p.X = box.MinEdge.X; p.X <= box.MaxEdge.X; p.X++)
- removeObjectRef(id, p);
- }
- bool ServerActiveObjectMap::isFreeId(u16 id)
- {
- if (id == 0)
- return false;
- return objects.find(id) == objects.end();
- }
- u16 ServerActiveObjectMap::getFreeId()
- {
- // try to reuse id's as late as possible
- static u16 last_used_id = 0;
- u16 startid = last_used_id;
- for (;;) {
- last_used_id++;
- if (isFreeId(last_used_id))
- return last_used_id;
- if (last_used_id == startid) // wrapped around
- return 0;
- }
- }
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