summaryrefslogtreecommitdiff
path: root/plugins/siege-engine.cpp
diff options
context:
space:
mode:
authorAlexander Gavrilov2012-09-17 14:59:59 +0400
committerAlexander Gavrilov2012-09-17 14:59:59 +0400
commit82e870c8ddc9b64370c3828d1d4807306ac72887 (patch)
tree25477841b4e451aba3f2f52a4d6010befdf76b6e /plugins/siege-engine.cpp
parentf2fde21b10c087fd95948a5f40ef972ac6688718 (diff)
downloaddfhack-82e870c8ddc9b64370c3828d1d4807306ac72887.tar.gz
dfhack-82e870c8ddc9b64370c3828d1d4807306ac72887.tar.bz2
dfhack-82e870c8ddc9b64370c3828d1d4807306ac72887.tar.xz
Move siege engine out of devel.
Diffstat (limited to 'plugins/siege-engine.cpp')
-rw-r--r--plugins/siege-engine.cpp1865
1 files changed, 1865 insertions, 0 deletions
diff --git a/plugins/siege-engine.cpp b/plugins/siege-engine.cpp
new file mode 100644
index 00000000..3b95aba3
--- /dev/null
+++ b/plugins/siege-engine.cpp
@@ -0,0 +1,1865 @@
+#include "Core.h"
+#include <Console.h>
+#include <Export.h>
+#include <Error.h>
+#include <PluginManager.h>
+#include <modules/Gui.h>
+#include <modules/Screen.h>
+#include <modules/Maps.h>
+#include <modules/MapCache.h>
+#include <modules/World.h>
+#include <modules/Units.h>
+#include <modules/Job.h>
+#include <modules/Materials.h>
+#include <LuaTools.h>
+#include <TileTypes.h>
+#include <vector>
+#include <cstdio>
+#include <stack>
+#include <string>
+#include <cmath>
+#include <string.h>
+
+#include <VTableInterpose.h>
+#include "df/graphic.h"
+#include "df/building_siegeenginest.h"
+#include "df/builtin_mats.h"
+#include "df/world.h"
+#include "df/buildings_other_id.h"
+#include "df/job.h"
+#include "df/building_drawbuffer.h"
+#include "df/ui.h"
+#include "df/viewscreen_dwarfmodest.h"
+#include "df/ui_build_selector.h"
+#include "df/flow_info.h"
+#include "df/report.h"
+#include "df/proj_itemst.h"
+#include "df/unit.h"
+#include "df/unit_soul.h"
+#include "df/unit_skill.h"
+#include "df/physical_attribute_type.h"
+#include "df/creature_raw.h"
+#include "df/caste_raw.h"
+#include "df/caste_raw_flags.h"
+#include "df/assumed_identity.h"
+#include "df/game_mode.h"
+#include "df/unit_misc_trait.h"
+#include "df/job.h"
+#include "df/job_item.h"
+#include "df/item_actual.h"
+#include "df/items_other_id.h"
+#include "df/building_stockpilest.h"
+#include "df/stockpile_links.h"
+#include "df/workshop_profile.h"
+#include "df/strain_type.h"
+#include "df/material.h"
+#include "df/flow_type.h"
+
+#include "MiscUtils.h"
+
+using std::vector;
+using std::string;
+using std::stack;
+using namespace DFHack;
+using namespace df::enums;
+
+using df::global::gamemode;
+using df::global::gps;
+using df::global::world;
+using df::global::ui;
+using df::global::ui_build_selector;
+
+using Screen::Pen;
+
+DFHACK_PLUGIN("siege-engine");
+
+/*
+ * Misc. utils
+ */
+
+typedef std::pair<df::coord, df::coord> coord_range;
+
+static void set_range(coord_range *target, df::coord p1, df::coord p2)
+{
+ if (!p1.isValid() || !p2.isValid())
+ {
+ *target = coord_range();
+ }
+ else
+ {
+ target->first.x = std::min(p1.x, p2.x);
+ target->first.y = std::min(p1.y, p2.y);
+ target->first.z = std::min(p1.z, p2.z);
+ target->second.x = std::max(p1.x, p2.x);
+ target->second.y = std::max(p1.y, p2.y);
+ target->second.z = std::max(p1.z, p2.z);
+ }
+}
+
+static bool is_range_valid(const coord_range &target)
+{
+ return target.first.isValid() && target.second.isValid();
+}
+
+static bool is_in_range(const coord_range &target, df::coord pos)
+{
+ return target.first.isValid() && target.second.isValid() &&
+ target.first.x <= pos.x && pos.x <= target.second.x &&
+ target.first.y <= pos.y && pos.y <= target.second.y &&
+ target.first.z <= pos.z && pos.z <= target.second.z;
+}
+
+static std::pair<int, int> get_engine_range(df::building_siegeenginest *bld)
+{
+ if (bld->type == siegeengine_type::Ballista)
+ return std::make_pair(1, 200);
+ else
+ return std::make_pair(30, 100);
+}
+
+static void orient_engine(df::building_siegeenginest *bld, df::coord target)
+{
+ int dx = target.x - bld->centerx;
+ int dy = target.y - bld->centery;
+
+ if (abs(dx) > abs(dy))
+ bld->facing = (dx > 0) ?
+ df::building_siegeenginest::Right :
+ df::building_siegeenginest::Left;
+ else
+ bld->facing = (dy > 0) ?
+ df::building_siegeenginest::Down :
+ df::building_siegeenginest::Up;
+}
+
+static int random_int(int val)
+{
+ return int(int64_t(rand())*val/RAND_MAX);
+}
+
+static int point_distance(df::coord speed)
+{
+ return std::max(abs(speed.x), std::max(abs(speed.y), abs(speed.z)));
+}
+
+inline void normalize(float &x, float &y, float &z)
+{
+ float dist = sqrtf(x*x + y*y + z*z);
+ if (dist == 0.0f) return;
+ x /= dist; y /= dist; z /= dist;
+}
+
+static void random_direction(float &x, float &y, float &z)
+{
+ float a, b, d;
+ for (;;) {
+ a = (rand() + 0.5f)*2.0f/RAND_MAX - 1.0f;
+ b = (rand() + 0.5f)*2.0f/RAND_MAX - 1.0f;
+ d = a*a + b*b;
+ if (d < 1.0f)
+ break;
+ }
+
+ float sq = sqrtf(1-d);
+ x = 2.0f*a*sq;
+ y = 2.0f*b*sq;
+ z = 1.0f - 2.0f*d;
+}
+
+static const int WEAR_TICKS = 806400;
+
+static bool apply_impact_damage(df::item *item, int minv, int maxv)
+{
+ MaterialInfo info(item);
+ if (!info.isValid())
+ {
+ item->setWear(3);
+ return false;
+ }
+
+ auto &strength = info.material->strength;
+
+ // Use random strain type excluding COMPRESSIVE (conveniently last)
+ int type = random_int(strain_type::COMPRESSIVE);
+ int power = minv + random_int(maxv-minv+1);
+
+ // High elasticity materials just bend
+ if (strength.strain_at_yield[type] >= 5000)
+ return true;
+
+ // Instant fracture?
+ int fracture = strength.fracture[type];
+ if (fracture <= power)
+ {
+ item->setWear(3);
+ return false;
+ }
+
+ // Impact within elastic strain range?
+ int yield = strength.yield[type];
+ if (yield > power)
+ return true;
+
+ // Can wear?
+ auto actual = virtual_cast<df::item_actual>(item);
+ if (!actual)
+ return false;
+
+ // Transform plastic deformation to wear
+ int max_wear = WEAR_TICKS * 4;
+ int cur_wear = WEAR_TICKS * actual->wear + actual->wear_timer;
+ cur_wear += int64_t(power - yield)*max_wear/(fracture - yield);
+
+ if (cur_wear >= max_wear)
+ {
+ actual->wear = 3;
+ return false;
+ }
+ else
+ {
+ actual->wear = cur_wear / WEAR_TICKS;
+ actual->wear_timer = cur_wear % WEAR_TICKS;
+ return true;
+ }
+}
+
+/*
+ * Configuration object
+ */
+
+static bool enable_plugin();
+
+struct EngineInfo {
+ int id;
+ df::building_siegeenginest *bld;
+
+ df::coord center;
+ coord_range building_rect;
+
+ bool is_catapult;
+ int proj_speed, hit_delay;
+ std::pair<int, int> fire_range;
+
+ coord_range target;
+
+ df::job_item_vector_id ammo_vector_id;
+ df::item_type ammo_item_type;
+
+ int operator_id, operator_frame;
+
+ std::set<int> stockpiles;
+ df::stockpile_links links;
+ df::workshop_profile profile;
+
+ bool hasTarget() { return is_range_valid(target); }
+ bool onTarget(df::coord pos) { return is_in_range(target, pos); }
+ df::coord getTargetSize() { return target.second - target.first; }
+
+ bool isInRange(int dist) {
+ return dist >= fire_range.first && dist <= fire_range.second;
+ }
+};
+
+static std::map<df::building*, EngineInfo*> engines;
+static std::map<df::coord, df::building*> coord_engines;
+
+static EngineInfo *find_engine(df::building *bld, bool create = false)
+{
+ auto ebld = strict_virtual_cast<df::building_siegeenginest>(bld);
+ if (!ebld)
+ return NULL;
+
+ auto &obj = engines[bld];
+
+ if (obj)
+ {
+ obj->bld = ebld;
+ return obj;
+ }
+
+ if (!create)
+ return NULL;
+
+ obj = new EngineInfo();
+
+ obj->id = bld->id;
+ obj->bld = ebld;
+ obj->center = df::coord(bld->centerx, bld->centery, bld->z);
+ obj->building_rect = coord_range(
+ df::coord(bld->x1, bld->y1, bld->z),
+ df::coord(bld->x2, bld->y2, bld->z)
+ );
+ obj->is_catapult = (ebld->type == siegeengine_type::Catapult);
+ obj->proj_speed = 2;
+ obj->hit_delay = obj->is_catapult ? 2 : -1;
+ obj->fire_range = get_engine_range(ebld);
+
+ obj->ammo_vector_id = job_item_vector_id::BOULDER;
+ obj->ammo_item_type = item_type::BOULDER;
+
+ obj->operator_id = obj->operator_frame = -1;
+
+ coord_engines[obj->center] = bld;
+ return obj;
+}
+
+static EngineInfo *find_engine(lua_State *L, int idx, bool create = false, bool silent = false)
+{
+ auto bld = Lua::CheckDFObject<df::building_siegeenginest>(L, idx);
+
+ auto engine = find_engine(bld, create);
+ if (!engine && !silent)
+ luaL_error(L, "no such engine");
+
+ return engine;
+}
+
+static EngineInfo *find_engine(df::coord pos)
+{
+ auto engine = find_engine(coord_engines[pos]);
+
+ if (engine)
+ {
+ auto bld0 = df::building::find(engine->id);
+ auto bld = strict_virtual_cast<df::building_siegeenginest>(bld0);
+ if (!bld)
+ return NULL;
+
+ engine->bld = bld;
+ }
+
+ return engine;
+}
+
+/*
+ * Configuration management
+ */
+
+static void clear_engines()
+{
+ for (auto it = engines.begin(); it != engines.end(); ++it)
+ delete it->second;
+ engines.clear();
+ coord_engines.clear();
+}
+
+static void load_engines()
+{
+ clear_engines();
+
+ auto pworld = Core::getInstance().getWorld();
+ std::vector<PersistentDataItem> vec;
+
+ pworld->GetPersistentData(&vec, "siege-engine/target/", true);
+ for (auto it = vec.begin(); it != vec.end(); ++it)
+ {
+ auto engine = find_engine(df::building::find(it->ival(0)), true);
+ if (!engine) continue;
+ engine->target.first = df::coord(it->ival(1), it->ival(2), it->ival(3));
+ engine->target.second = df::coord(it->ival(4), it->ival(5), it->ival(6));
+ }
+
+ pworld->GetPersistentData(&vec, "siege-engine/ammo/", true);
+ for (auto it = vec.begin(); it != vec.end(); ++it)
+ {
+ auto engine = find_engine(df::building::find(it->ival(0)), true);
+ if (!engine) continue;
+ engine->ammo_vector_id = (df::job_item_vector_id)it->ival(1);
+ engine->ammo_item_type = (df::item_type)it->ival(2);
+ }
+
+ pworld->GetPersistentData(&vec, "siege-engine/stockpiles/", true);
+ for (auto it = vec.begin(); it != vec.end(); ++it)
+ {
+ auto engine = find_engine(df::building::find(it->ival(0)), true);
+ if (!engine)
+ continue;
+ auto pile = df::building::find(it->ival(1));
+ if (!pile || pile->getType() != building_type::Stockpile)
+ {
+ pworld->DeletePersistentData(*it);
+ continue;;
+ }
+
+ engine->stockpiles.insert(it->ival(1));
+ }
+
+ pworld->GetPersistentData(&vec, "siege-engine/profiles/", true);
+ for (auto it = vec.begin(); it != vec.end(); ++it)
+ {
+ auto engine = find_engine(df::building::find(it->ival(0)), true);
+ if (!engine) continue;
+ engine->profile.min_level = it->ival(1);
+ engine->profile.max_level = it->ival(2);
+ }
+
+ pworld->GetPersistentData(&vec, "siege-engine/profile-workers/", true);
+ for (auto it = vec.begin(); it != vec.end(); ++it)
+ {
+ auto engine = find_engine(df::building::find(it->ival(0)), true);
+ if (!engine)
+ continue;
+ auto unit = df::unit::find(it->ival(1));
+ if (!unit || !Units::isCitizen(unit))
+ {
+ pworld->DeletePersistentData(*it);
+ continue;
+ }
+ engine->profile.permitted_workers.push_back(it->ival(1));
+ }
+}
+
+static int getTargetArea(lua_State *L)
+{
+ auto engine = find_engine(L, 1, false, true);
+
+ if (engine && engine->hasTarget())
+ {
+ Lua::Push(L, engine->target.first);
+ Lua::Push(L, engine->target.second);
+ }
+ else
+ {
+ lua_pushnil(L);
+ lua_pushnil(L);
+ }
+
+ return 2;
+}
+
+static void clearTargetArea(df::building_siegeenginest *bld)
+{
+ CHECK_NULL_POINTER(bld);
+
+ if (auto engine = find_engine(bld))
+ engine->target = coord_range();
+
+ auto pworld = Core::getInstance().getWorld();
+ auto key = stl_sprintf("siege-engine/target/%d", bld->id);
+ pworld->DeletePersistentData(pworld->GetPersistentData(key));
+}
+
+static bool setTargetArea(df::building_siegeenginest *bld, df::coord target_min, df::coord target_max)
+{
+ CHECK_NULL_POINTER(bld);
+ CHECK_INVALID_ARGUMENT(target_min.isValid() && target_max.isValid());
+
+ if (!enable_plugin())
+ return false;
+
+ auto pworld = Core::getInstance().getWorld();
+ auto key = stl_sprintf("siege-engine/target/%d", bld->id);
+ auto entry = pworld->GetPersistentData(key, NULL);
+ if (!entry.isValid())
+ return false;
+
+ auto engine = find_engine(bld, true);
+
+ set_range(&engine->target, target_min, target_max);
+
+ entry.ival(0) = bld->id;
+ entry.ival(1) = engine->target.first.x;
+ entry.ival(2) = engine->target.first.y;
+ entry.ival(3) = engine->target.first.z;
+ entry.ival(4) = engine->target.second.x;
+ entry.ival(5) = engine->target.second.y;
+ entry.ival(6) = engine->target.second.z;
+
+ df::coord sum = target_min + target_max;
+ orient_engine(bld, df::coord(sum.x/2, sum.y/2, sum.z/2));
+
+ return true;
+}
+
+static int getAmmoItem(lua_State *L)
+{
+ auto engine = find_engine(L, 1, false, true);
+ if (!engine)
+ Lua::Push(L, item_type::BOULDER);
+ else
+ Lua::Push(L, engine->ammo_item_type);
+ return 1;
+}
+
+static int setAmmoItem(lua_State *L)
+{
+ if (!enable_plugin())
+ return 0;
+
+ auto engine = find_engine(L, 1, true);
+ auto item_type = (df::item_type)luaL_optint(L, 2, item_type::BOULDER);
+ if (!is_valid_enum_item(item_type))
+ luaL_argerror(L, 2, "invalid item type");
+
+ auto pworld = Core::getInstance().getWorld();
+ auto key = stl_sprintf("siege-engine/ammo/%d", engine->id);
+ auto entry = pworld->GetPersistentData(key, NULL);
+ if (!entry.isValid())
+ return 0;
+
+ engine->ammo_vector_id = job_item_vector_id::ANY_FREE;
+ engine->ammo_item_type = item_type;
+
+ FOR_ENUM_ITEMS(job_item_vector_id, id)
+ {
+ auto other = ENUM_ATTR(job_item_vector_id, other, id);
+ auto type = ENUM_ATTR(items_other_id, item, other);
+ if (type == item_type)
+ {
+ engine->ammo_vector_id = id;
+ break;
+ }
+ }
+
+ entry.ival(0) = engine->id;
+ entry.ival(1) = engine->ammo_vector_id;
+ entry.ival(2) = engine->ammo_item_type;
+
+ lua_pushboolean(L, true);
+ return 1;
+}
+
+static void forgetStockpileLink(EngineInfo *engine, int pile_id)
+{
+ engine->stockpiles.erase(pile_id);
+
+ auto pworld = Core::getInstance().getWorld();
+ auto key = stl_sprintf("siege-engine/stockpiles/%d/%d", engine->id, pile_id);
+ pworld->DeletePersistentData(pworld->GetPersistentData(key));
+}
+
+static void update_stockpile_links(EngineInfo *engine)
+{
+ engine->links.take_from_pile.clear();
+
+ for (auto it = engine->stockpiles.begin(); it != engine->stockpiles.end(); )
+ {
+ int id = *it; ++it;
+ auto pile = df::building::find(id);
+
+ if (!pile || pile->getType() != building_type::Stockpile)
+ forgetStockpileLink(engine, id);
+ else
+ // The vector is sorted, but we are iterating through a sorted set
+ engine->links.take_from_pile.push_back(pile);
+ }
+}
+
+static int getStockpileLinks(lua_State *L)
+{
+ auto engine = find_engine(L, 1, false, true);
+ if (!engine || engine->stockpiles.empty())
+ return 0;
+
+ update_stockpile_links(engine);
+
+ auto &links = engine->links.take_from_pile;
+ lua_createtable(L, links.size(), 0);
+
+ for (size_t i = 0; i < links.size(); i++)
+ {
+ Lua::Push(L, links[i]);
+ lua_rawseti(L, -2, i+1);
+ }
+
+ return 1;
+}
+
+static bool isLinkedToPile(df::building_siegeenginest *bld, df::building_stockpilest *pile)
+{
+ CHECK_NULL_POINTER(bld);
+ CHECK_NULL_POINTER(pile);
+
+ auto engine = find_engine(bld);
+
+ return engine && engine->stockpiles.count(pile->id);
+}
+
+static bool addStockpileLink(df::building_siegeenginest *bld, df::building_stockpilest *pile)
+{
+ CHECK_NULL_POINTER(bld);
+ CHECK_NULL_POINTER(pile);
+
+ if (!enable_plugin())
+ return false;
+
+ auto pworld = Core::getInstance().getWorld();
+ auto key = stl_sprintf("siege-engine/stockpiles/%d/%d", bld->id, pile->id);
+ auto entry = pworld->GetPersistentData(key, NULL);
+ if (!entry.isValid())
+ return false;
+
+ auto engine = find_engine(bld, true);
+
+ entry.ival(0) = bld->id;
+ entry.ival(1) = pile->id;
+
+ engine->stockpiles.insert(pile->id);
+ return true;
+}
+
+static bool removeStockpileLink(df::building_siegeenginest *bld, df::building_stockpilest *pile)
+{
+ CHECK_NULL_POINTER(bld);
+ CHECK_NULL_POINTER(pile);
+
+ if (auto engine = find_engine(bld))
+ {
+ forgetStockpileLink(engine, pile->id);
+ return true;
+ }
+
+ return false;
+}
+
+static df::workshop_profile *saveWorkshopProfile(df::building_siegeenginest *bld)
+{
+ CHECK_NULL_POINTER(bld);
+
+ if (!enable_plugin())
+ return NULL;
+
+ // Save skill limits
+ auto pworld = Core::getInstance().getWorld();
+ auto key = stl_sprintf("siege-engine/profiles/%d", bld->id);
+ auto entry = pworld->GetPersistentData(key, NULL);
+ if (!entry.isValid())
+ return NULL;
+
+ auto engine = find_engine(bld, true);
+
+ entry.ival(0) = engine->id;
+ entry.ival(1) = engine->profile.min_level;
+ entry.ival(2) = engine->profile.max_level;
+
+ // Save worker list
+ std::vector<PersistentDataItem> vec;
+ auto &workers = engine->profile.permitted_workers;
+
+ key = stl_sprintf("siege-engine/profile-workers/%d", bld->id);
+ pworld->GetPersistentData(&vec, key, true);
+
+ for (auto it = vec.begin(); it != vec.end(); ++it)
+ {
+ if (linear_index(workers, it->ival(1)) < 0)
+ pworld->DeletePersistentData(*it);
+ }
+
+ for (size_t i = 0; i < workers.size(); i++)
+ {
+ key = stl_sprintf("siege-engine/profile-workers/%d/%d", bld->id, workers[i]);
+ entry = pworld->GetPersistentData(key, NULL);
+ if (!entry.isValid())
+ continue;
+ entry.ival(0) = engine->id;
+ entry.ival(1) = workers[i];
+ }
+
+ return &engine->profile;
+}
+
+static int getOperatorSkill(df::building_siegeenginest *bld, bool force = false)
+{
+ CHECK_NULL_POINTER(bld);
+
+ auto engine = find_engine(bld);
+ if (!engine)
+ return 0;
+
+ if (engine->operator_id != -1 &&
+ (world->frame_counter - engine->operator_frame) <= 5)
+ {
+ auto op_unit = df::unit::find(engine->operator_id);
+ if (op_unit)
+ return Units::getEffectiveSkill(op_unit, job_skill::SIEGEOPERATE);
+ }
+
+ if (force)
+ {
+ color_ostream_proxy out(Core::getInstance().getConsole());
+ out.print("Forced siege operator search\n");
+
+ auto &active = world->units.active;
+ for (size_t i = 0; i < active.size(); i++)
+ if (active[i]->pos == engine->center && Units::isCitizen(active[i]))
+ return Units::getEffectiveSkill(active[i], job_skill::SIEGEOPERATE);
+ }
+
+ return 0;
+}
+
+/*
+ * Trajectory raytracing
+ */
+
+struct ProjectilePath {
+ static const int DEFAULT_FUDGE = 31;
+
+ df::coord origin, goal, target, fudge_delta;
+ int divisor, fudge_factor;
+ df::coord speed, direction;
+
+ ProjectilePath(df::coord origin, df::coord goal) :
+ origin(origin), goal(goal), fudge_factor(1)
+ {
+ fudge_delta = df::coord(0,0,0);
+ calc_line();
+ }
+
+ ProjectilePath(df::coord origin, df::coord goal, df::coord delta, int factor) :
+ origin(origin), goal(goal), fudge_delta(delta), fudge_factor(factor)
+ {
+ calc_line();
+ }
+
+ ProjectilePath(df::coord origin, df::coord goal, float zdelta, int factor = DEFAULT_FUDGE) :
+ origin(origin), goal(goal), fudge_factor(factor)
+ {
+ fudge_delta = df::coord(0,0,int(factor * zdelta));
+ calc_line();
+ }
+
+ void calc_line()
+ {
+ speed = goal - origin;
+ speed.x *= fudge_factor;
+ speed.y *= fudge_factor;
+ speed.z *= fudge_factor;
+ speed = speed + fudge_delta;
+ target = origin + speed;
+ divisor = point_distance(speed);
+ if (divisor <= 0) divisor = 1;
+ direction = df::coord(speed.x>=0?1:-1,speed.y>=0?1:-1,speed.z>=0?1:-1);
+ }
+
+ df::coord operator[] (int i) const
+ {
+ int div2 = divisor * 2;
+ int bias = divisor-1;
+ return origin + df::coord(
+ (2*speed.x*i + direction.x*bias)/div2,
+ (2*speed.y*i + direction.y*bias)/div2,
+ (2*speed.z*i + direction.z*bias)/div2
+ );
+ }
+};
+
+static ProjectilePath decode_path(lua_State *L, int idx, df::coord origin)
+{
+ idx = lua_absindex(L, idx);
+
+ Lua::StackUnwinder frame(L);
+ df::coord goal;
+
+ lua_getfield(L, idx, "target");
+ Lua::CheckDFAssign(L, &goal, frame[1]);
+
+ lua_getfield(L, idx, "delta");
+
+ if (!lua_isnil(L, frame[2]))
+ {
+ lua_getfield(L, idx, "factor");
+ int factor = luaL_optnumber(L, frame[3], ProjectilePath::DEFAULT_FUDGE);
+
+ if (lua_isnumber(L, frame[2]))
+ return ProjectilePath(origin, goal, lua_tonumber(L, frame[2]), factor);
+
+ df::coord delta;
+ Lua::CheckDFAssign(L, &delta, frame[2]);
+
+ return ProjectilePath(origin, goal, delta, factor);
+ }
+
+ return ProjectilePath(origin, goal);
+}
+
+static int projPosAtStep(lua_State *L)
+{
+ auto engine = find_engine(L, 1);
+ auto path = decode_path(L, 2, engine->center);
+ int step = luaL_checkint(L, 3);
+ Lua::Push(L, path[step]);
+ return 1;
+}
+
+static bool isPassableTile(df::coord pos)
+{
+ auto ptile = Maps::getTileType(pos);
+
+ return !ptile || FlowPassable(*ptile);
+}
+
+static bool isTargetableTile(df::coord pos)
+{
+ auto ptile = Maps::getTileType(pos);
+
+ return ptile && FlowPassable(*ptile) && !isOpenTerrain(*ptile);
+}
+
+static bool isTreeTile(df::coord pos)
+{
+ auto ptile = Maps::getTileType(pos);
+
+ return ptile && tileShape(*ptile) == tiletype_shape::TREE;
+}
+
+static bool adjustToTarget(EngineInfo *engine, df::coord *pos)
+{
+ if (isTargetableTile(*pos))
+ return true;
+
+ for (df::coord fudge = *pos;
+ fudge.z <= engine->target.second.z; fudge.z++)
+ {
+ if (!isTargetableTile(fudge))
+ continue;
+ *pos = fudge;
+ return true;
+ }
+
+ for (df::coord fudge = *pos;
+ fudge.z >= engine->target.first.z; fudge.z--)
+ {
+ if (!isTargetableTile(fudge))
+ continue;
+ *pos = fudge;
+ return true;
+ }
+
+ return false;
+}
+
+static int adjustToTarget(lua_State *L)
+{
+ auto engine = find_engine(L, 1, true);
+ df::coord pos;
+ Lua::CheckDFAssign(L, &pos, 2);
+ bool ok = adjustToTarget(engine, &pos);
+ Lua::Push(L, pos);
+ Lua::Push(L, ok);
+ return 2;
+}
+
+static const char* const hit_type_names[] = {
+ "wall", "floor", "ceiling", "map_edge", "tree"
+};
+
+struct PathMetrics {
+ enum CollisionType {
+ Impassable,
+ Floor,
+ Ceiling,
+ MapEdge,
+ Tree
+ } hit_type;
+
+ int collision_step, collision_z_step;
+ int goal_step, goal_z_step, goal_distance;
+
+ bool hits() const { return collision_step > goal_step; }
+
+ PathMetrics(const ProjectilePath &path)
+ {
+ compute(path);
+ }
+
+ void compute(const ProjectilePath &path)
+ {
+ collision_step = goal_step = goal_z_step = 1000000;
+ collision_z_step = 0;
+
+ goal_distance = point_distance(path.origin - path.goal);
+
+ int step = 0;
+ df::coord prev_pos = path.origin;
+
+ for (;;) {
+ df::coord cur_pos = path[++step];
+ if (cur_pos == prev_pos)
+ break;
+
+ if (cur_pos.z == path.goal.z)
+ {
+ goal_z_step = std::min(step, goal_z_step);
+ if (cur_pos == path.goal)
+ goal_step = step;
+ }
+
+ if (!Maps::isValidTilePos(cur_pos))
+ {
+ hit_type = PathMetrics::MapEdge;
+ break;
+ }
+
+ if (!isPassableTile(cur_pos))
+ {
+ if (isTreeTile(cur_pos))
+ {
+ // The projectile code has a bug where it will
+ // hit a tree on the same tick as a Z level change.
+ if (cur_pos.z != prev_pos.z)
+ {
+ hit_type = Tree;
+ break;
+ }
+ }
+ else
+ {
+ hit_type = Impassable;
+ break;
+ }
+ }
+
+ if (cur_pos.z != prev_pos.z)
+ {
+ int top_z = std::max(prev_pos.z, cur_pos.z);
+ auto ptile = Maps::getTileType(cur_pos.x, cur_pos.y, top_z);
+
+ if (ptile && !LowPassable(*ptile))
+ {
+ hit_type = (cur_pos.z > prev_pos.z ? Ceiling : Floor);
+ break;
+ }
+
+ collision_z_step = step;
+ }
+
+ prev_pos = cur_pos;
+ }
+
+ collision_step = step;
+ }
+};
+
+enum TargetTileStatus {
+ TARGET_OK, TARGET_RANGE, TARGET_BLOCKED, TARGET_SEMIBLOCKED
+};
+static const char* const target_tile_type_names[] = {
+ "ok", "out_of_range", "blocked", "semi_blocked"
+};
+
+static TargetTileStatus calcTileStatus(EngineInfo *engine, const PathMetrics &raytrace)
+{
+ if (raytrace.hits())
+ {
+ if (engine->isInRange(raytrace.goal_step))
+ return TARGET_OK;
+ else
+ return TARGET_RANGE;
+ }
+ else
+ return TARGET_BLOCKED;
+}
+
+static int projPathMetrics(lua_State *L)
+{
+ auto engine = find_engine(L, 1);
+ auto path = decode_path(L, 2, engine->center);
+
+ PathMetrics info(path);
+
+ lua_createtable(L, 0, 7);
+ Lua::SetField(L, hit_type_names[info.hit_type], -1, "hit_type");
+ Lua::SetField(L, info.collision_step, -1, "collision_step");
+ Lua::SetField(L, info.collision_z_step, -1, "collision_z_step");
+ Lua::SetField(L, info.goal_distance, -1, "goal_distance");
+ if (info.goal_step < info.collision_step)
+ Lua::SetField(L, info.goal_step, -1, "goal_step");
+ if (info.goal_z_step < info.collision_step)
+ Lua::SetField(L, info.goal_z_step, -1, "goal_z_step");
+ Lua::SetField(L, target_tile_type_names[calcTileStatus(engine, info)], -1, "status");
+ return 1;
+}
+
+static TargetTileStatus calcTileStatus(EngineInfo *engine, df::coord target, float zdelta)
+{
+ ProjectilePath path(engine->center, target, zdelta);
+ PathMetrics raytrace(path);
+ return calcTileStatus(engine, raytrace);
+}
+
+static TargetTileStatus calcTileStatus(EngineInfo *engine, df::coord target)
+{
+ auto status = calcTileStatus(engine, target, 0.0f);
+
+ if (status == TARGET_BLOCKED)
+ {
+ if (calcTileStatus(engine, target, 0.5f) < TARGET_BLOCKED)
+ return TARGET_SEMIBLOCKED;
+
+ if (calcTileStatus(engine, target, -0.5f) < TARGET_BLOCKED)
+ return TARGET_SEMIBLOCKED;
+ }
+
+ return status;
+}
+
+static std::string getTileStatus(df::building_siegeenginest *bld, df::coord tile_pos)
+{
+ auto engine = find_engine(bld, true);
+ if (!engine)
+ return "invalid";
+
+ return target_tile_type_names[calcTileStatus(engine, tile_pos)];
+}
+
+static void paintAimScreen(df::building_siegeenginest *bld, df::coord view, df::coord2d ltop, df::coord2d size)
+{
+ auto engine = find_engine(bld, true);
+ CHECK_NULL_POINTER(engine);
+
+ for (int x = 0; x < size.x; x++)
+ {
+ for (int y = 0; y < size.y; y++)
+ {
+ df::coord tile_pos = view + df::coord(x,y,0);
+ if (is_in_range(engine->building_rect, tile_pos))
+ continue;
+
+ Pen cur_tile = Screen::readTile(ltop.x+x, ltop.y+y);
+ if (!cur_tile.valid())
+ continue;
+
+ int color;
+
+ switch (calcTileStatus(engine, tile_pos))
+ {
+ case TARGET_OK:
+ color = COLOR_GREEN;
+ break;
+ case TARGET_RANGE:
+ color = COLOR_CYAN;
+ break;
+ case TARGET_BLOCKED:
+ color = COLOR_RED;
+ break;
+ case TARGET_SEMIBLOCKED:
+ color = COLOR_BROWN;
+ break;
+ }
+
+ if (cur_tile.fg && cur_tile.ch != ' ')
+ {
+ cur_tile.fg = color;
+ cur_tile.bg = 0;
+ }
+ else
+ {
+ cur_tile.fg = 0;
+ cur_tile.bg = color;
+ }
+
+ cur_tile.bold = engine->onTarget(tile_pos);
+
+ if (cur_tile.tile)
+ cur_tile.tile_mode = Pen::CharColor;
+
+ Screen::paintTile(cur_tile, ltop.x+x, ltop.y+y);
+ }
+ }
+}
+
+/*
+ * Unit tracking
+ */
+
+static const float MAX_TIME = 1000000.0f;
+
+struct UnitPath {
+ df::unit *unit;
+ std::map<float, df::coord> path;
+
+ struct Hit {
+ UnitPath *path;
+ df::coord pos;
+ int dist;
+ float time, lmargin, rmargin;
+ };
+
+ static std::map<df::unit*, UnitPath*> cache;
+
+ static UnitPath *get(df::unit *unit)
+ {
+ auto &cv = cache[unit];
+ if (!cv) cv = new UnitPath(unit);
+ return cv;
+ };
+
+ UnitPath(df::unit *unit) : unit(unit)
+ {
+ if (unit->flags1.bits.rider)
+ {
+ auto mount = df::unit::find(unit->relations.rider_mount_id);
+
+ if (mount)
+ {
+ path = get(mount)->path;
+ return;
+ }
+ }
+
+ df::coord pos = unit->pos;
+ df::coord dest = unit->path.dest;
+ auto &upath = unit->path.path;
+
+ if (dest.isValid() && !upath.x.empty())
+ {
+ float time = unit->counters.job_counter+0.5f;
+ float speed = Units::computeMovementSpeed(unit)/100.0f;
+
+ if (unit->counters.unconscious > 0)
+ time += unit->counters.unconscious;
+
+ for (size_t i = 0; i < upath.size(); i++)
+ {
+ df::coord new_pos = upath[i];
+ if (new_pos == pos)
+ continue;
+
+ float delay = speed;
+ if (new_pos.x != pos.x && new_pos.y != pos.y)
+ delay *= 362.0/256.0;
+
+ path[time] = pos;
+ pos = new_pos;
+ time += delay + 1;
+ }
+ }
+
+ path[MAX_TIME] = pos;
+ }
+
+ void get_margin(std::map<float,df::coord>::iterator &it, float time, float *lmargin, float *rmargin)
+ {
+ auto it2 = it;
+ *lmargin = (it == path.begin()) ? MAX_TIME : time - (--it2)->first;
+ *rmargin = (it->first == MAX_TIME) ? MAX_TIME : it->first - time;
+ }
+
+ df::coord posAtTime(float time, float *lmargin = NULL, float *rmargin = NULL)
+ {
+ CHECK_INVALID_ARGUMENT(time < MAX_TIME);
+
+ auto it = path.upper_bound(time);
+ if (lmargin)
+ get_margin(it, time, lmargin, rmargin);
+ return it->second;
+ }
+
+ bool findHits(EngineInfo *engine, std::vector<Hit> *hit_points, float bias)
+ {
+ df::coord origin = engine->center;
+
+ Hit info;
+ info.path = this;
+
+ for (auto it = path.begin(); it != path.end(); ++it)
+ {
+ info.pos = it->second;
+ info.dist = point_distance(origin - info.pos);
+ info.time = float(info.dist)*(engine->proj_speed+1) + engine->hit_delay + bias;
+ get_margin(it, info.time, &info.lmargin, &info.rmargin);
+
+ if (info.lmargin > 0 && info.rmargin > 0)
+ {
+ if (engine->onTarget(info.pos) && engine->isInRange(info.dist))
+ hit_points->push_back(info);
+ }
+ }
+
+ return !hit_points->empty();
+ }
+};
+
+std::map<df::unit*, UnitPath*> UnitPath::cache;
+
+static void push_margin(lua_State *L, float margin)
+{
+ if (margin == MAX_TIME)
+ lua_pushnil(L);
+ else
+ lua_pushnumber(L, margin);
+}
+
+static int traceUnitPath(lua_State *L)
+{
+ auto unit = Lua::CheckDFObject<df::unit>(L, 1);
+
+ CHECK_NULL_POINTER(unit);
+
+ size_t idx = 1;
+ auto info = UnitPath::get(unit);
+ lua_createtable(L, info->path.size(), 0);
+
+ float last_time = 0.0f;
+ for (auto it = info->path.begin(); it != info->path.end(); ++it)
+ {
+ Lua::Push(L, it->second);
+ if (idx > 1)
+ {
+ lua_pushnumber(L, last_time);
+ lua_setfield(L, -2, "from");
+ }
+ if (idx < info->path.size())
+ {
+ lua_pushnumber(L, it->first);
+ lua_setfield(L, -2, "to");
+ }
+ lua_rawseti(L, -2, idx++);
+ last_time = it->first;
+ }
+
+ return 1;
+}
+
+static int unitPosAtTime(lua_State *L)
+{
+ auto unit = Lua::CheckDFObject<df::unit>(L, 1);
+ float time = luaL_checknumber(L, 2);
+
+ CHECK_NULL_POINTER(unit);
+
+ float lmargin, rmargin;
+ auto info = UnitPath::get(unit);
+
+ Lua::Push(L, info->posAtTime(time, &lmargin, &rmargin));
+ push_margin(L, lmargin);
+ push_margin(L, rmargin);
+ return 3;
+}
+
+static bool canTargetUnit(df::unit *unit)
+{
+ CHECK_NULL_POINTER(unit);
+
+ if (unit->flags1.bits.dead ||
+ unit->flags3.bits.ghostly ||
+ unit->flags1.bits.caged ||
+ unit->flags1.bits.hidden_in_ambush)
+ return false;
+
+ return true;
+}
+
+static void proposeUnitHits(EngineInfo *engine, std::vector<UnitPath::Hit> *hits, float bias)
+{
+ auto &active = world->units.active;
+
+ for (size_t i = 0; i < active.size(); i++)
+ {
+ auto unit = active[i];
+
+ if (!canTargetUnit(unit))
+ continue;
+
+ UnitPath::get(unit)->findHits(engine, hits, bias);
+ }
+}
+
+static int proposeUnitHits(lua_State *L)
+{
+ auto engine = find_engine(L, 1);
+ float bias = luaL_optnumber(L, 2, 0);
+
+ if (!engine->hasTarget())
+ luaL_error(L, "target not set");
+
+ std::vector<UnitPath::Hit> hits;
+ proposeUnitHits(engine, &hits, bias);
+
+ lua_createtable(L, hits.size(), 0);
+
+ for (size_t i = 0; i < hits.size(); i++)
+ {
+ auto &hit = hits[i];
+ lua_createtable(L, 0, 6);
+ Lua::SetField(L, hit.path->unit, -1, "unit");
+ Lua::SetField(L, hit.pos, -1, "pos");
+ Lua::SetField(L, hit.dist, -1, "dist");
+ Lua::SetField(L, hit.time, -1, "time");
+ push_margin(L, hit.lmargin); lua_setfield(L, -2, "lmargin");
+ push_margin(L, hit.rmargin); lua_setfield(L, -2, "rmargin");
+ lua_rawseti(L, -2, i+1);
+ }
+
+ return 1;
+}
+
+static int computeNearbyWeight(lua_State *L)
+{
+ auto engine = find_engine(L, 1);
+ luaL_checktype(L, 2, LUA_TTABLE);
+ luaL_checktype(L, 3, LUA_TTABLE);
+ const char *fname = luaL_optstring(L, 4, "nearby_weight");
+
+ std::vector<UnitPath*> units;
+ std::vector<float> weights;
+
+ lua_pushnil(L);
+
+ while (lua_next(L, 3))
+ {
+ df::unit *unit;
+ if (lua_isnumber(L, -2))
+ unit = df::unit::find(lua_tointeger(L, -2));
+ else
+ unit = Lua::CheckDFObject<df::unit>(L, -2);
+ if (!unit)
+ continue;
+ units.push_back(UnitPath::get(unit));
+ weights.push_back(lua_tonumber(L, -1));
+ lua_pop(L, 1);
+ }
+
+ lua_pushnil(L);
+
+ while (lua_next(L, 2))
+ {
+ Lua::StackUnwinder frame(L, 1);
+
+ lua_getfield(L, frame[1], "unit");
+ df::unit *unit = Lua::CheckDFObject<df::unit>(L, -1);
+
+ lua_getfield(L, frame[1], "time");
+ float time = luaL_checknumber(L, lua_gettop(L));
+
+ df::coord pos;
+
+ lua_getfield(L, frame[1], "pos");
+ if (lua_isnil(L, -1))
+ {
+ if (!unit) luaL_error(L, "either unit or pos is required");
+ pos = UnitPath::get(unit)->posAtTime(time);
+ }
+ else
+ Lua::CheckDFAssign(L, &pos, -1);
+
+ float sum = 0.0f;
+
+ for (size_t i = 0; i < units.size(); i++)
+ {
+ if (units[i]->unit == unit)
+ continue;
+
+ auto diff = units[i]->posAtTime(time) - pos;
+ float dist = 1 + sqrtf(diff.x*diff.x + diff.y*diff.y + diff.z*diff.z);
+ sum += weights[i]/(dist*dist);
+ }
+
+ lua_pushnumber(L, sum);
+ lua_setfield(L, frame[1], fname);
+ }
+
+ return 0;
+}
+
+/*
+ * Projectile hook
+ */
+
+static const int offsets[8][2] = {
+ { -1, -1 }, { 0, -1 }, { 1, -1 },
+ { -1, 0 }, { 1, 0 },
+ { -1, 1 }, { 0, 1 }, { 1, 1 }
+};
+
+struct projectile_hook : df::proj_itemst {
+ typedef df::proj_itemst interpose_base;
+
+ void aimAtPoint(EngineInfo *engine, const ProjectilePath &path)
+ {
+ target_pos = path.target;
+
+ // Debug
+ Maps::getTileOccupancy(path.goal)->bits.arrow_color = COLOR_LIGHTMAGENTA;
+
+ PathMetrics raytrace(path);
+
+ // Materialize map blocks, or the projectile will crash into them
+ for (int i = 0; i < raytrace.collision_step; i++)
+ Maps::ensureTileBlock(path[i]);
+
+ // Find valid hit point for catapult stones
+ if (flags.bits.high_flying)
+ {
+ if (raytrace.hits())
+ fall_threshold = raytrace.goal_step;
+ else
+ fall_threshold = (raytrace.collision_z_step+raytrace.collision_step-1)/2;
+
+ while (fall_threshold < raytrace.collision_step-1)
+ {
+ if (isTargetableTile(path[fall_threshold]))
+ break;
+
+ fall_threshold++;
+ }
+ }
+
+ fall_threshold = std::max(fall_threshold, engine->fire_range.first);
+ fall_threshold = std::min(fall_threshold, engine->fire_range.second);
+ }
+
+ void aimAtPoint(EngineInfo *engine, int skill, const ProjectilePath &path)
+ {
+ df::coord fail_target = path.goal;
+
+ orient_engine(engine->bld, path.goal);
+
+ // Debug
+ Maps::getTileOccupancy(path.goal)->bits.arrow_color = COLOR_LIGHTRED;
+
+ // Dabbling always hit in 7x7 area
+ if (skill < skill_rating::Novice)
+ {
+ fail_target.x += random_int(7)-3;
+ fail_target.y += random_int(7)-3;
+ aimAtPoint(engine, ProjectilePath(path.origin, fail_target));
+ return;
+ }
+
+ // Exact hit chance
+ float hit_chance = 1.04f - powf(0.8f, skill);
+
+ if (float(rand())/RAND_MAX < hit_chance)
+ {
+ aimAtPoint(engine, path);
+ return;
+ }
+
+ // Otherwise perturb
+ if (skill <= skill_rating::Proficient)
+ {
+ // 5x5
+ fail_target.x += random_int(5)-2;
+ fail_target.y += random_int(5)-2;
+ }
+ else
+ {
+ // 3x3
+ int idx = random_int(8);
+ fail_target.x += offsets[idx][0];
+ fail_target.y += offsets[idx][1];
+ }
+
+ ProjectilePath fail(path.origin, fail_target, path.fudge_delta, path.fudge_factor);
+ aimAtPoint(engine, fail);
+ }
+
+ void aimAtArea(EngineInfo *engine, int skill)
+ {
+ df::coord target, last_passable;
+ df::coord tbase = engine->target.first;
+ df::coord tsize = engine->getTargetSize();
+ bool success = false;
+
+ for (int i = 0; i < 50; i++)
+ {
+ target = tbase + df::coord(
+ random_int(tsize.x), random_int(tsize.y), random_int(tsize.z)
+ );
+
+ if (adjustToTarget(engine, &target))
+ last_passable = target;
+ else
+ continue;
+
+ ProjectilePath path(engine->center, target, engine->is_catapult ? 0.5f : 0.0f);
+ PathMetrics raytrace(path);
+
+ if (raytrace.hits() && engine->isInRange(raytrace.goal_step))
+ {
+ aimAtPoint(engine, skill, path);
+ return;
+ }
+ }
+
+ if (!last_passable.isValid())
+ last_passable = target;
+
+ aimAtPoint(engine, skill, ProjectilePath(engine->center, last_passable));
+ }
+
+ static int safeAimProjectile(lua_State *L)
+ {
+ color_ostream &out = *Lua::GetOutput(L);
+ auto proj = (projectile_hook*)lua_touserdata(L, 1);
+ auto engine = (EngineInfo*)lua_touserdata(L, 2);
+ int skill = lua_tointeger(L, 3);
+
+ if (!Lua::PushModulePublic(out, L, "plugins.siege-engine", "doAimProjectile"))
+ luaL_error(L, "Projectile aiming AI not available");
+
+ Lua::PushDFObject(L, engine->bld);
+ Lua::Push(L, proj->item);
+ Lua::Push(L, engine->target.first);
+ Lua::Push(L, engine->target.second);
+ Lua::Push(L, skill);
+
+ lua_call(L, 5, 1);
+
+ if (lua_isnil(L, -1))
+ proj->aimAtArea(engine, skill);
+ else
+ proj->aimAtPoint(engine, skill, decode_path(L, -1, engine->center));
+
+ return 0;
+ }
+
+ void doCheckMovement()
+ {
+ if (flags.bits.parabolic || distance_flown != 0 ||
+ fall_counter != fall_delay || item == NULL)
+ return;
+
+ auto engine = find_engine(origin_pos);
+ if (!engine || !engine->hasTarget())
+ return;
+
+ auto L = Lua::Core::State;
+ CoreSuspendClaimer suspend;
+ color_ostream_proxy out(Core::getInstance().getConsole());
+
+ int skill = getOperatorSkill(engine->bld, true);
+
+ // Dabbling can't aim
+ if (skill < skill_rating::Novice)
+ aimAtArea(engine, skill);
+ else
+ {
+ lua_pushcfunction(L, safeAimProjectile);
+ lua_pushlightuserdata(L, this);
+ lua_pushlightuserdata(L, engine);
+ lua_pushinteger(L, skill);
+
+ if (!Lua::Core::SafeCall(out, 3, 0))
+ aimAtArea(engine, skill);
+ }
+
+ switch (item->getType())
+ {
+ case item_type::CAGE:
+ flags.bits.bouncing = false;
+ break;
+ case item_type::BIN:
+ case item_type::BARREL:
+ flags.bits.bouncing = false;
+ break;
+ default:
+ break;
+ }
+ }
+
+ void doLaunchContents()
+ {
+ // Translate cartoon flight speed to parabolic
+ float speed = 100000.0f / (fall_delay + 1);
+ int min_zspeed = (fall_delay+1)*4900;
+
+ float bonus = 1.0f + 0.1f*(origin_pos.z -cur_pos.z);
+ bonus *= 1.0f + (distance_flown - 60) / 200.0f;
+ speed *= bonus;
+
+ // Flight direction vector
+ df::coord dist = target_pos - origin_pos;
+ float vx = dist.x, vy = dist.y, vz = fabs((float)dist.z);
+ normalize(vx, vy, vz);
+
+ int start_z = 0;
+
+ // Start at tile top, if hit a wall
+ ProjectilePath path(origin_pos, target_pos);
+ auto next_pos = path[distance_flown+1];
+ if (next_pos.z == cur_pos.z && !isPassableTile(next_pos))
+ start_z = 49000;
+
+ MapExtras::MapCache mc;
+ std::vector<df::item*> contents;
+ Items::getContainedItems(item, &contents);
+
+ for (size_t i = 0; i < contents.size(); i++)
+ {
+ auto child = contents[i];
+
+ // Liquids are vaporized so that they cover nearby units
+ if (child->isLiquid())
+ {
+ auto flow = Maps::spawnFlow(
+ cur_pos,
+ flow_type::MaterialVapor,
+ child->getMaterial(), child->getMaterialIndex(),
+ 100
+ );
+
+ // should it leave a puddle too?..
+ if (flow && Items::remove(mc, child))
+ continue;
+ }
+
+ auto proj = Items::makeProjectile(mc, child);
+ if (!proj) continue;
+
+ bool keep = apply_impact_damage(child, 50000, int(250000*bonus));
+
+ proj->flags.bits.no_impact_destroy = keep;
+ //proj->flags.bits.bouncing = true;
+ proj->flags.bits.piercing = true;
+ proj->flags.bits.parabolic = true;
+ proj->flags.bits.unk9 = true;
+ proj->flags.bits.no_collide = true;
+
+ proj->pos_z = start_z;
+
+ float sx, sy, sz;
+ random_direction(sx, sy, sz);
+ sx += vx*0.7; sy += vy*0.7; sz += vz*0.7;
+ if (sz < 0) sz = -sz;
+ normalize(sx, sy, sz);
+
+ proj->speed_x = int(speed * sx);
+ proj->speed_y = int(speed * sy);
+ proj->speed_z = std::max(min_zspeed, int(speed * sz));
+ }
+ }
+
+ DEFINE_VMETHOD_INTERPOSE(bool, checkMovement, ())
+ {
+ if (flags.bits.high_flying || flags.bits.piercing)
+ doCheckMovement();
+
+ return INTERPOSE_NEXT(checkMovement)();
+ }
+
+ DEFINE_VMETHOD_INTERPOSE(bool, checkImpact, (bool no_damage_floor))
+ {
+ if (!flags.bits.has_hit_ground && !flags.bits.parabolic &&
+ flags.bits.high_flying && !flags.bits.bouncing &&
+ !flags.bits.no_impact_destroy && target_pos != origin_pos &&
+ item && item->flags.bits.container)
+ {
+ doLaunchContents();
+ }
+
+ return INTERPOSE_NEXT(checkImpact)(no_damage_floor);
+ }
+};
+
+IMPLEMENT_VMETHOD_INTERPOSE(projectile_hook, checkMovement);
+IMPLEMENT_VMETHOD_INTERPOSE(projectile_hook, checkImpact);
+
+/*
+ * Building hook
+ */
+
+struct building_hook : df::building_siegeenginest {
+ typedef df::building_siegeenginest interpose_base;
+
+ DEFINE_VMETHOD_INTERPOSE(df::workshop_profile*, getWorkshopProfile, ())
+ {
+ if (auto engine = find_engine(this))
+ return &engine->profile;
+
+ return INTERPOSE_NEXT(getWorkshopProfile)();
+ }
+
+ DEFINE_VMETHOD_INTERPOSE(df::stockpile_links*, getStockpileLinks, ())
+ {
+ if (auto engine = find_engine(this))
+ {
+ update_stockpile_links(engine);
+ return &engine->links;
+ }
+
+ return INTERPOSE_NEXT(getStockpileLinks)();
+ }
+
+ DEFINE_VMETHOD_INTERPOSE(void, updateAction, ())
+ {
+ INTERPOSE_NEXT(updateAction)();
+
+ if (jobs.empty())
+ return;
+
+ if (auto engine = find_engine(this))
+ {
+ auto job = jobs[0];
+ bool save_op = false;
+
+ switch (job->job_type)
+ {
+ case job_type::LoadCatapult:
+ if (!job->job_items.empty())
+ {
+ auto item = job->job_items[0];
+ item->item_type = engine->ammo_item_type;
+ item->vector_id = engine->ammo_vector_id;
+
+ switch (item->item_type)
+ {
+ case item_type::NONE:
+ case item_type::BOULDER:
+ case item_type::BLOCKS:
+ item->mat_type = 0;
+ break;
+
+ case item_type::BIN:
+ case item_type::BARREL:
+ item->mat_type = -1;
+ // A hack to make it take objects assigned to stockpiles.
+ // Since reaction_id is not set, the actual value is not used.
+ item->contains.resize(1);
+ break;
+
+ default:
+ item->mat_type = -1;
+ break;
+ }
+ }
+ // fallthrough
+
+ case job_type::LoadBallista:
+ case job_type::FireCatapult:
+ case job_type::FireBallista:
+ if (auto worker = Job::getWorker(job))
+ {
+ engine->operator_id = worker->id;
+ engine->operator_frame = world->frame_counter;
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+};
+
+IMPLEMENT_VMETHOD_INTERPOSE(building_hook, getWorkshopProfile);
+IMPLEMENT_VMETHOD_INTERPOSE(building_hook, getStockpileLinks);
+IMPLEMENT_VMETHOD_INTERPOSE(building_hook, updateAction);
+
+/*
+ * Initialization
+ */
+
+DFHACK_PLUGIN_LUA_FUNCTIONS {
+ DFHACK_LUA_FUNCTION(clearTargetArea),
+ DFHACK_LUA_FUNCTION(setTargetArea),
+ DFHACK_LUA_FUNCTION(isLinkedToPile),
+ DFHACK_LUA_FUNCTION(addStockpileLink),
+ DFHACK_LUA_FUNCTION(removeStockpileLink),
+ DFHACK_LUA_FUNCTION(saveWorkshopProfile),
+ DFHACK_LUA_FUNCTION(getTileStatus),
+ DFHACK_LUA_FUNCTION(paintAimScreen),
+ DFHACK_LUA_FUNCTION(canTargetUnit),
+ DFHACK_LUA_FUNCTION(isPassableTile),
+ DFHACK_LUA_FUNCTION(isTreeTile),
+ DFHACK_LUA_FUNCTION(isTargetableTile),
+ DFHACK_LUA_END
+};
+
+DFHACK_PLUGIN_LUA_COMMANDS {
+ DFHACK_LUA_COMMAND(getTargetArea),
+ DFHACK_LUA_COMMAND(getAmmoItem),
+ DFHACK_LUA_COMMAND(setAmmoItem),
+ DFHACK_LUA_COMMAND(getStockpileLinks),
+ DFHACK_LUA_COMMAND(projPosAtStep),
+ DFHACK_LUA_COMMAND(projPathMetrics),
+ DFHACK_LUA_COMMAND(adjustToTarget),
+ DFHACK_LUA_COMMAND(traceUnitPath),
+ DFHACK_LUA_COMMAND(unitPosAtTime),
+ DFHACK_LUA_COMMAND(proposeUnitHits),
+ DFHACK_LUA_COMMAND(computeNearbyWeight),
+ DFHACK_LUA_END
+};
+
+static bool is_enabled = false;
+
+static void enable_hooks(bool enable)
+{
+ is_enabled = enable;
+
+ INTERPOSE_HOOK(projectile_hook, checkMovement).apply(enable);
+ INTERPOSE_HOOK(projectile_hook, checkImpact).apply(enable);
+
+ INTERPOSE_HOOK(building_hook, getWorkshopProfile).apply(enable);
+ INTERPOSE_HOOK(building_hook, getStockpileLinks).apply(enable);
+ INTERPOSE_HOOK(building_hook, updateAction).apply(enable);
+
+ if (enable)
+ load_engines();
+ else
+ clear_engines();
+}
+
+static bool enable_plugin()
+{
+ if (is_enabled)
+ return true;
+
+ auto pworld = Core::getInstance().getWorld();
+ auto entry = pworld->GetPersistentData("siege-engine/enabled", NULL);
+ if (!entry.isValid())
+ return false;
+
+ enable_hooks(true);
+ return true;
+}
+
+static void clear_caches(color_ostream &out)
+{
+ if (!UnitPath::cache.empty())
+ {
+ for (auto it = UnitPath::cache.begin(); it != UnitPath::cache.end(); ++it)
+ delete it->second;
+
+ UnitPath::cache.clear();
+ }
+}
+
+DFhackCExport command_result plugin_onstatechange(color_ostream &out, state_change_event event)
+{
+ switch (event) {
+ case SC_MAP_LOADED:
+ {
+ auto pworld = Core::getInstance().getWorld();
+ bool enable = pworld->GetPersistentData("siege-engine/enabled").isValid();
+
+ if (enable)
+ {
+ out.print("Enabling the siege engine plugin.\n");
+ enable_hooks(true);
+ }
+ else
+ enable_hooks(false);
+ }
+ break;
+ case SC_MAP_UNLOADED:
+ enable_hooks(false);
+ break;
+ default:
+ break;
+ }
+
+ return CR_OK;
+}
+
+DFhackCExport command_result plugin_init ( color_ostream &out, std::vector <PluginCommand> &commands)
+{
+ if (Core::getInstance().isMapLoaded())
+ plugin_onstatechange(out, SC_MAP_LOADED);
+
+ return CR_OK;
+}
+
+DFhackCExport command_result plugin_shutdown ( color_ostream &out )
+{
+ enable_hooks(false);
+ return CR_OK;
+}
+
+DFhackCExport command_result plugin_onupdate ( color_ostream &out )
+{
+ clear_caches(out);
+ return CR_OK;
+}