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Trivial siege engine aiming at units, with logic in lua.

develop
Alexander Gavrilov 2012-09-11 19:17:24 +04:00
parent 8ab615f6d0
commit 3a075f4bc7
4 changed files with 419 additions and 219 deletions
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5
library/include/LuaTools.h
Unescape Escape View File

@ -287,6 +287,11 @@ namespace DFHack {namespace Lua {
PushDFObject(state, ptr);
}
template<class T> inline void SetField(lua_State *L, T val, int idx, const char *name) {
if (idx < 0) idx = lua_absindex(L, idx);
Push(L, val); lua_setfield(L, idx, name);
}
template<class T>
void PushVector(lua_State *state, const T &pvec, bool addn = false)
{

583
plugins/devel/siege-engine.cpp
Unescape Escape View File

@ -137,13 +137,24 @@ static bool enable_plugin();
struct EngineInfo {
int id;
coord_range target;
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;
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;
@ -151,29 +162,64 @@ static std::map<df::coord, df::building*> coord_engines;
static EngineInfo *find_engine(df::building *bld, bool create = false)
{
if (!bld)
auto ebld = strict_virtual_cast<df::building_siegeenginest>(bld);
if (!ebld)
return NULL;
auto it = engines.find(bld);
if (it != engines.end())
{
it->second.bld = ebld;
return &it->second;
}
if (!create)
return NULL;
auto *obj = &engines[bld];
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 = 3;
obj->fire_range = get_engine_range(ebld);
coord_engines[obj->center] = bld;
return obj;
}
static EngineInfo *find_engine(lua_State *L, int idx, bool create = false)
{
auto bld = Lua::CheckDFObject<df::building_siegeenginest>(L, idx);
auto engine = find_engine(bld);
if (!engine)
luaL_error(L, "no such engine");
return engine;
}
static EngineInfo *find_engine(df::coord pos)
{
return find_engine(coord_engines[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;
}
static void clear_engines()
@ -263,37 +309,61 @@ static bool setTargetArea(df::building_siegeenginest *bld, df::coord target_min,
return true;
}
static int getShotSkill(df::building_siegeenginest *bld)
{
CHECK_NULL_POINTER(bld);
auto engine = find_engine(bld);
if (!engine)
return 0;
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
*/
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), target(goal), fudge_factor(1)
origin(origin), goal(goal), fudge_factor(1)
{
fudge_delta = df::coord(0,0,0);
calc_line();
}
void fudge(int factor, df::coord delta)
ProjectilePath(df::coord origin, df::coord goal, df::coord delta, int factor) :
origin(origin), goal(goal), fudge_delta(delta), fudge_factor(factor)
{
fudge_factor = factor;
fudge_delta = delta;
auto diff = goal - origin;
diff.x *= fudge_factor;
diff.y *= fudge_factor;
diff.z *= fudge_factor;
target = origin + diff + fudge_delta;
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 = target - origin;
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);
@ -311,42 +381,139 @@ struct ProjectilePath {
}
};
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
MapEdge,
Tree
} hit_type;
int collision_step;
int goal_step, goal_z_step;
std::vector<df::coord> coords;
int collision_step, collision_z_step;
int goal_step, goal_z_step, goal_distance;
bool hits() const { return collision_step > goal_step; }
bool hits() { return collision_step > goal_step; }
PathMetrics(const ProjectilePath &path)
{
compute(path);
}
PathMetrics(const ProjectilePath &path, bool list_coords = false)
void compute(const ProjectilePath &path)
{
coords.clear();
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;
if (list_coords)
coords.push_back(prev_pos);
for (;;) {
df::coord cur_pos = path[++step];
if (cur_pos == prev_pos)
break;
if (list_coords)
coords.push_back(cur_pos);
if (cur_pos.z == path.goal.z)
{
@ -362,10 +529,23 @@ struct PathMetrics {
}
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)
{
@ -377,6 +557,8 @@ struct PathMetrics {
hit_type = (cur_pos.z > prev_pos.z ? Ceiling : Floor);
break;
}
collision_z_step = step;
}
prev_pos = cur_pos;
@ -386,107 +568,112 @@ struct PathMetrics {
}
};
struct AimContext {
df::building_siegeenginest *bld;
df::coord origin;
coord_range building_rect;
EngineInfo *engine;
std::pair<int, int> fire_range;
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"
};
AimContext(df::building_siegeenginest *bld, EngineInfo *engine)
: bld(bld), engine(engine)
static TargetTileStatus calcTileStatus(EngineInfo *engine, const PathMetrics &raytrace)
{
if (raytrace.hits())
{
origin = df::coord(bld->centerx, bld->centery, bld->z);
building_rect = coord_range(
df::coord(bld->x1, bld->y1, bld->z),
df::coord(bld->x2, bld->y2, bld->z)
);
fire_range = get_engine_range(bld);
if (engine->isInRange(raytrace.goal_step))
return TARGET_OK;
else
return TARGET_RANGE;
}
else
return TARGET_BLOCKED;
}
bool isInRange(const PathMetrics &raytrace)
{
return raytrace.goal_step >= fire_range.first &&
raytrace.goal_step <= fire_range.second;
}
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;
}
bool adjustToPassable(df::coord *pos)
{
if (isPassableTile(*pos))
return true;
static TargetTileStatus calcTileStatus(EngineInfo *engine, df::coord target, float zdelta)
{
ProjectilePath path(engine->center, target, zdelta);
PathMetrics raytrace(path);
return calcTileStatus(engine, raytrace);
}
for (df::coord fudge = *pos;
fudge.z < engine->target.second.z; fudge.z++)
{
if (!isPassableTile(fudge))
continue;
*pos = fudge;
return true;
}
static TargetTileStatus calcTileStatus(EngineInfo *engine, df::coord target)
{
auto status = calcTileStatus(engine, target, 0.0f);
for (df::coord fudge = *pos;
fudge.z > engine->target.first.z; fudge.z--)
if (status == TARGET_BLOCKED)
{
if (!isPassableTile(fudge))
continue;
*pos = fudge;
return true;
}
if (calcTileStatus(engine, target, 0.5f) < TARGET_BLOCKED)
return TARGET_SEMIBLOCKED;
return false;
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)
{
AimContext context(bld, NULL);
ProjectilePath path(context.origin, tile_pos);
PathMetrics raytrace(path);
auto engine = find_engine(bld, true);
if (!engine)
return "invalid";
if (raytrace.hits())
{
if (context.isInRange(raytrace))
return "ok";
else
return "out_of_range";
}
else
return "blocked";
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)
{
CHECK_NULL_POINTER(bld);
AimContext context(bld, find_engine(bld));
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(context.building_rect, tile_pos))
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;
ProjectilePath path(context.origin, tile_pos);
PathMetrics raytrace(path);
int color;
if (raytrace.hits())
switch (calcTileStatus(engine, tile_pos))
{
if (context.isInRange(raytrace))
case TARGET_OK:
color = COLOR_GREEN;
else
break;
case TARGET_RANGE:
color = COLOR_CYAN;
}
else
break;
case TARGET_BLOCKED:
color = COLOR_RED;
break;
case TARGET_SEMIBLOCKED:
color = COLOR_BROWN;
break;
}
if (cur_tile.fg && cur_tile.ch != ' ')
{
@ -499,7 +686,7 @@ static void paintAimScreen(df::building_siegeenginest *bld, df::coord view, df::
cur_tile.bg = color;
}
cur_tile.bold = (context.engine && context.engine->onTarget(tile_pos));
cur_tile.bold = engine->onTarget(tile_pos);
if (cur_tile.tile)
cur_tile.tile_mode = Pen::CharColor;
@ -537,6 +724,17 @@ struct UnitPath {
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;
@ -598,7 +796,7 @@ struct UnitPath {
if (info.lmargin > 0 && info.rmargin > 0)
{
if (engine->onTarget(info.pos))
if (engine->onTarget(info.pos) && engine->isInRange(info.dist))
hit_points->push_back(info);
}
}
@ -664,6 +862,19 @@ static int unitPosAtTime(lua_State *L)
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;
@ -672,12 +883,7 @@ static void proposeUnitHits(EngineInfo *engine, std::vector<UnitPath::Hit> *hits
{
auto unit = active[i];
if (unit->flags1.bits.dead ||
unit->flags3.bits.ghostly ||
unit->flags1.bits.caged ||
unit->flags1.bits.chained ||
unit->flags1.bits.rider ||
unit->flags1.bits.hidden_in_ambush)
if (!canTargetUnit(unit))
continue;
UnitPath::get(unit)->findHits(engine, hits, bias);
@ -686,12 +892,9 @@ static void proposeUnitHits(EngineInfo *engine, std::vector<UnitPath::Hit> *hits
static int proposeUnitHits(lua_State *L)
{
auto bld = Lua::CheckDFObject<df::building_siegeenginest>(L, 1);
auto engine = find_engine(L, 1);
float bias = luaL_optnumber(L, 2, 0);
auto engine = find_engine(bld);
if (!engine)
luaL_error(L, "no such engine");
if (!engine->hasTarget())
luaL_error(L, "target not set");
@ -704,10 +907,10 @@ static int proposeUnitHits(lua_State *L)
{
auto &hit = hits[i];
lua_createtable(L, 0, 6);
Lua::PushDFObject(L, hit.path->unit); lua_setfield(L, -2, "unit");
Lua::Push(L, hit.pos); lua_setfield(L, -2, "pos");
lua_pushnumber(L, hit.dist); lua_setfield(L, -2, "dist");
lua_pushnumber(L, hit.time); lua_setfield(L, -2, "time");
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);
@ -716,89 +919,6 @@ static int proposeUnitHits(lua_State *L)
return 1;
}
#if 0
struct UnitContext {
AimContext &ctx;
struct UnitInfo {
df::unit *unit;
UnitPath path;
float score;
UnitInfo(df::unit *unit) : unit(unit), path(unit) {}
};
std::map<df::unit*, UnitInfo*> units;
UnitContext(AimContext &ctx) : ctx(ctx) {}
~UnitContext()
{
for (auto it = units.begin(); it != units.end(); ++it)
delete it->second;
}
float unit_score(df::unit *unit)
{
float score = 1.0f;
if (unit->flags1.bits.tame && unit->civ_id == ui->civ_id)
score = -1.0f;
if (unit->flags1.bits.diplomat || unit->flags1.bits.merchant)
score = -2.0f;
else if (Units::isCitizen(unit))
score = -10.0f;
else
{
if (unit->flags1.bits.marauder)
score += 0.5f;
if (unit->flags1.bits.active_invader)
score += 1.0f;
if (unit->flags1.bits.invader_origin)
score += 1.0f;
if (unit->flags1.bits.invades)
score += 1.0f;
if (unit->flags1.bits.hidden_ambusher)
score += 1.0f;
}
if (unit->flags1.bits.ridden)
{
for (size_t i = 0; i < unit->refs.size(); i++)
{
if (!unit->refs[i]->getType() == general_ref_type::UNIT_RIDER)
continue;
if (auto rider = unit->refs[i]->getUnit())
score += unit_score(rider);
}
}
}
void select_units()
{
auto &active = world->units.active;
for (size_t i = 0; i < active.size(); i++)
{
auto unit = active[i];
if (unit->flags1.bits.dead ||
unit->flags3.bits.ghostly ||
unit->flags1.bits.caged ||
unit->flags1.bits.chained ||
unit->flags1.bits.rider ||
unit->flags1.bits.hidden_in_ambush)
continue;
auto info = units[unit] = new UnitInfo(unit);
info->findHits(ctx, ctx.proj_hit_delay);
info->score = unit_score(unit);
}
}
};
#endif
/*
* Projectile hook
*/
@ -806,7 +926,7 @@ struct UnitContext {
struct projectile_hook : df::proj_itemst {
typedef df::proj_itemst interpose_base;
void aimAtPoint(AimContext &context, ProjectilePath &path, bool bad_shot = false)
void aimAtPoint(EngineInfo *engine, const ProjectilePath &path)
{
target_pos = path.target;
@ -816,28 +936,32 @@ struct projectile_hook : df::proj_itemst {
for (int i = 0; i < raytrace.collision_step; i++)
Maps::ensureTileBlock(path[i]);
if (flags.bits.piercing)
// Find valid hit point for catapult stones
if (flags.bits.high_flying)
{
if (bad_shot)
fall_threshold = std::min(raytrace.goal_z_step, raytrace.collision_step);
}
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 (bad_shot)
fall_threshold = context.fire_range.second;
else
fall_threshold = raytrace.goal_step;
if (isTargetableTile(path[fall_threshold]))
break;
fall_threshold++;
}
}
fall_threshold = std::max(fall_threshold, context.fire_range.first);
fall_threshold = std::min(fall_threshold, context.fire_range.second);
fall_threshold = std::max(fall_threshold, engine->fire_range.first);
fall_threshold = std::min(fall_threshold, engine->fire_range.second);
}
void aimAtArea(AimContext &context)
void aimAtArea(EngineInfo *engine)
{
df::coord target, last_passable;
df::coord tbase = context.engine->target.first;
df::coord tsize = context.engine->getTargetSize();
df::coord tbase = engine->target.first;
df::coord tsize = engine->getTargetSize();
bool success = false;
for (int i = 0; i < 50; i++)
@ -846,17 +970,17 @@ struct projectile_hook : df::proj_itemst {
random_int(tsize.x), random_int(tsize.y), random_int(tsize.z)
);
if (context.adjustToPassable(&target))
if (adjustToTarget(engine, &target))
last_passable = target;
else
continue;
ProjectilePath path(context.origin, target);
ProjectilePath path(engine->center, target, engine->is_catapult ? 0.5f : 0.0f);
PathMetrics raytrace(path);
if (raytrace.hits() && context.isInRange(raytrace))
if (raytrace.hits() && engine->isInRange(raytrace.goal_step))
{
aimAtPoint(context, path);
aimAtPoint(engine, path);
return;
}
}
@ -864,8 +988,30 @@ struct projectile_hook : df::proj_itemst {
if (!last_passable.isValid())
last_passable = target;
ProjectilePath path(context.origin, last_passable);
aimAtPoint(context, path, true);
aimAtPoint(engine, 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);
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, engine->target.first);
Lua::Push(L, engine->target.second);
lua_call(L, 3, 1);
if (lua_isnil(L, -1))
proj->aimAtArea(engine);
else
proj->aimAtPoint(engine, decode_path(L, -1, engine->center));
return 0;
}
void doCheckMovement()
@ -877,14 +1023,16 @@ struct projectile_hook : df::proj_itemst {
if (!engine || !engine->hasTarget())
return;
auto bld0 = df::building::find(engine->id);
auto bld = strict_virtual_cast<df::building_siegeenginest>(bld0);
if (!bld)
return;
auto L = Lua::Core::State;
CoreSuspendClaimer suspend;
color_ostream_proxy out(Core::getInstance().getConsole());
AimContext context(bld, engine);
lua_pushcfunction(L, safeAimProjectile);
lua_pushlightuserdata(L, this);
lua_pushlightuserdata(L, engine);
aimAtArea(context);
if (!Lua::Core::SafeCall(out, 2, 0))
aimAtArea(engine);
}
DEFINE_VMETHOD_INTERPOSE(bool, checkMovement, ())
@ -907,11 +1055,18 @@ DFHACK_PLUGIN_LUA_FUNCTIONS {
DFHACK_LUA_FUNCTION(setTargetArea),
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(projPosAtStep),
DFHACK_LUA_COMMAND(projPathMetrics),
DFHACK_LUA_COMMAND(adjustToTarget),
DFHACK_LUA_COMMAND(traceUnitPath),
DFHACK_LUA_COMMAND(unitPosAtTime),
DFHACK_LUA_COMMAND(proposeUnitHits),

31
plugins/lua/siege-engine.lua
Unescape Escape View File

@ -10,4 +10,35 @@ local _ENV = mkmodule('plugins.siege-engine')
--]]
Z_STEP_COUNT = 15
Z_STEP = 1/31
function findShotHeight(engine, target)
local path = { target = target, delta = 0.0 }
if projPathMetrics(engine, path).goal_step then
return path
end
for i = 1,Z_STEP_COUNT do
path.delta = i*Z_STEP
if projPathMetrics(engine, path).goal_step then
return path
end
path.delta = -i*Z_STEP
if projPathMetrics(engine, path).goal_step then
return path
end
end
end
function doAimProjectile(engine, target_min, target_max)
local targets = proposeUnitHits(engine)
if #targets > 0 then
local rnd = math.random(#targets)
return findShotHeight(engine, targets[rnd].pos)
end
end
return _ENV

9
scripts/gui/siege-engine.lua
Unescape Escape View File

@ -45,7 +45,9 @@ function SiegeEngine:onShow()
end
function SiegeEngine:onDestroy()
if self.building then
self:selectBuilding(self.building, self.old_cursor, self.old_viewport, 10)
end
end
function SiegeEngine:showCursor(enable)
@ -213,6 +215,7 @@ local status_table = {
ok = { pen = COLOR_GREEN, msg = "Target accessible" },
out_of_range = { pen = COLOR_CYAN, msg = "Target out of range" },
blocked = { pen = COLOR_RED, msg = "Target obstructed" },
semi_blocked = { pen = COLOR_BROWN, msg = "Partially obstructed" },
}
function SiegeEngine:onRenderBody_aim(dc)
@ -291,6 +294,12 @@ function SiegeEngine:onInput(keys)
self:centerViewOn(self.center)
elseif keys.LEAVESCREEN then
self:dismiss()
elseif keys.LEAVESCREEN_ALL then
self:dismiss()
self.building = nil
guidm.clearCursorPos()
df.global.ui.main.mode = df.ui_sidebar_mode.Default
df.global.world.selected_building = nil
end
end