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Phase 3: Behavior system with grid.step() turn manager

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- Add EntityBehavior struct with 11 behavior types: IDLE, CUSTOM,
  NOISE4/8, PATH, WAYPOINT, PATROL, LOOP, SLEEP, SEEK, FLEE.
  Each returns BehaviorOutput (MOVED/DONE/BLOCKED/NO_ACTION) without
  modifying entity position directly (closes #300)
- Add grid.step(n=1, turn_order=None) turn manager: groups entities
  by turn_order, executes behaviors, fires triggers (TARGET/DONE/BLOCKED),
  updates cell_position and spatial hash. Snapshot-based iteration for
  callback safety (closes #301)
- Entity properties: behavior_type (read-only), turn_order, move_speed,
  target_label, sight_radius. Method: set_behavior(type, waypoints,
  turns, path)
- Update ColorLayer::updatePerspective to use cell_position

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
John McCardle 2026-03-15 22:14:02 -04:00
commit 700c21ce96
8 changed files with 1016 additions and 0 deletions
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321
src/EntityBehavior.cpp Normal file
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#include "EntityBehavior.h"
#include "UIEntity.h"
#include "UIGrid.h"
#include "UIGridPathfinding.h"
#include <random>
#include <algorithm>
// Thread-local random engine for behavior randomness
static thread_local std::mt19937 rng{std::random_device{}()};
// =============================================================================
// Per-behavior execution functions
// =============================================================================
static BehaviorOutput executeIdle(UIEntity& entity, UIGrid& grid) {
return {BehaviorResult::NO_ACTION, {}};
}
static BehaviorOutput executeCustom(UIEntity& entity, UIGrid& grid) {
// CUSTOM does nothing built-in — step callback handles everything
return {BehaviorResult::NO_ACTION, {}};
}
static bool isCellWalkable(UIGrid& grid, int x, int y) {
if (x < 0 || x >= grid.grid_w || y < 0 || y >= grid.grid_h) return false;
return grid.at(x, y).walkable;
}
static BehaviorOutput executeNoise(UIEntity& entity, UIGrid& grid, bool include_diagonals) {
int cx = entity.cell_position.x;
int cy = entity.cell_position.y;
// Build candidate moves
std::vector<sf::Vector2i> candidates;
// Cardinal directions
sf::Vector2i dirs4[] = {{0, -1}, {0, 1}, {-1, 0}, {1, 0}};
sf::Vector2i dirs8[] = {{0, -1}, {0, 1}, {-1, 0}, {1, 0},
{-1, -1}, {1, -1}, {-1, 1}, {1, 1}};
auto* dirs = include_diagonals ? dirs8 : dirs4;
int count = include_diagonals ? 8 : 4;
for (int i = 0; i < count; i++) {
int nx = cx + dirs[i].x;
int ny = cy + dirs[i].y;
if (isCellWalkable(grid, nx, ny)) {
candidates.push_back({nx, ny});
}
}
if (candidates.empty()) {
return {BehaviorResult::NO_ACTION, {}};
}
std::uniform_int_distribution<int> dist(0, candidates.size() - 1);
auto target = candidates[dist(rng)];
return {BehaviorResult::MOVED, target};
}
static BehaviorOutput executePath(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (behavior.path_step_index >= static_cast<int>(behavior.current_path.size())) {
return {BehaviorResult::DONE, {}};
}
auto target = behavior.current_path[behavior.path_step_index];
behavior.path_step_index++;
if (!isCellWalkable(grid, target.x, target.y)) {
return {BehaviorResult::BLOCKED, target};
}
return {BehaviorResult::MOVED, target};
}
static BehaviorOutput executeWaypoint(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (behavior.waypoints.empty()) {
return {BehaviorResult::DONE, {}};
}
// If we've reached the current waypoint, advance to next
auto& wp = behavior.waypoints[behavior.current_waypoint_index];
if (entity.cell_position.x == wp.x && entity.cell_position.y == wp.y) {
behavior.current_waypoint_index++;
if (behavior.current_waypoint_index >= static_cast<int>(behavior.waypoints.size())) {
return {BehaviorResult::DONE, {}};
}
// Clear path to recompute for new waypoint
behavior.current_path.clear();
behavior.path_step_index = 0;
}
// Compute path to current waypoint if needed
if (behavior.current_path.empty() || behavior.path_step_index >= static_cast<int>(behavior.current_path.size())) {
auto& target_wp = behavior.waypoints[behavior.current_waypoint_index];
// Use grid pathfinding (A*)
TCODPath path(grid.getTCODMap());
path.compute(entity.cell_position.x, entity.cell_position.y, target_wp.x, target_wp.y);
behavior.current_path.clear();
behavior.path_step_index = 0;
int px, py;
while (path.walk(&px, &py, true)) {
behavior.current_path.push_back({px, py});
}
if (behavior.current_path.empty()) {
return {BehaviorResult::BLOCKED, target_wp};
}
}
// Follow the path
auto target = behavior.current_path[behavior.path_step_index];
behavior.path_step_index++;
if (!isCellWalkable(grid, target.x, target.y)) {
return {BehaviorResult::BLOCKED, target};
}
return {BehaviorResult::MOVED, target};
}
static BehaviorOutput executePatrol(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (behavior.waypoints.empty()) {
return {BehaviorResult::NO_ACTION, {}};
}
// Check if at current waypoint
auto& wp = behavior.waypoints[behavior.current_waypoint_index];
if (entity.cell_position.x == wp.x && entity.cell_position.y == wp.y) {
int next = behavior.current_waypoint_index + behavior.patrol_direction;
if (next < 0 || next >= static_cast<int>(behavior.waypoints.size())) {
behavior.patrol_direction *= -1;
next = behavior.current_waypoint_index + behavior.patrol_direction;
}
behavior.current_waypoint_index = next;
behavior.current_path.clear();
behavior.path_step_index = 0;
}
// Same path-following logic as waypoint
if (behavior.current_path.empty() || behavior.path_step_index >= static_cast<int>(behavior.current_path.size())) {
auto& target_wp = behavior.waypoints[behavior.current_waypoint_index];
TCODPath path(grid.getTCODMap());
path.compute(entity.cell_position.x, entity.cell_position.y, target_wp.x, target_wp.y);
behavior.current_path.clear();
behavior.path_step_index = 0;
int px, py;
while (path.walk(&px, &py, true)) {
behavior.current_path.push_back({px, py});
}
if (behavior.current_path.empty()) {
return {BehaviorResult::BLOCKED, target_wp};
}
}
auto target = behavior.current_path[behavior.path_step_index];
behavior.path_step_index++;
if (!isCellWalkable(grid, target.x, target.y)) {
return {BehaviorResult::BLOCKED, target};
}
return {BehaviorResult::MOVED, target};
}
static BehaviorOutput executeLoop(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (behavior.waypoints.empty()) {
return {BehaviorResult::NO_ACTION, {}};
}
// Check if at current waypoint
auto& wp = behavior.waypoints[behavior.current_waypoint_index];
if (entity.cell_position.x == wp.x && entity.cell_position.y == wp.y) {
behavior.current_waypoint_index = (behavior.current_waypoint_index + 1) % behavior.waypoints.size();
behavior.current_path.clear();
behavior.path_step_index = 0;
}
// Same path-following logic
if (behavior.current_path.empty() || behavior.path_step_index >= static_cast<int>(behavior.current_path.size())) {
auto& target_wp = behavior.waypoints[behavior.current_waypoint_index];
TCODPath path(grid.getTCODMap());
path.compute(entity.cell_position.x, entity.cell_position.y, target_wp.x, target_wp.y);
behavior.current_path.clear();
behavior.path_step_index = 0;
int px, py;
while (path.walk(&px, &py, true)) {
behavior.current_path.push_back({px, py});
}
if (behavior.current_path.empty()) {
return {BehaviorResult::BLOCKED, target_wp};
}
}
auto target = behavior.current_path[behavior.path_step_index];
behavior.path_step_index++;
if (!isCellWalkable(grid, target.x, target.y)) {
return {BehaviorResult::BLOCKED, target};
}
return {BehaviorResult::MOVED, target};
}
static BehaviorOutput executeSleep(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (behavior.sleep_turns_remaining > 0) {
behavior.sleep_turns_remaining--;
if (behavior.sleep_turns_remaining == 0) {
return {BehaviorResult::DONE, {}};
}
}
return {BehaviorResult::NO_ACTION, {}};
}
static BehaviorOutput executeSeek(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (!behavior.dijkstra_map) {
return {BehaviorResult::NO_ACTION, {}};
}
// Use Dijkstra map to find the lowest-distance neighbor (moving toward target)
int cx = entity.cell_position.x;
int cy = entity.cell_position.y;
float best_dist = std::numeric_limits<float>::max();
sf::Vector2i best_cell = {cx, cy};
bool found = false;
sf::Vector2i dirs[] = {{0, -1}, {0, 1}, {-1, 0}, {1, 0},
{-1, -1}, {1, -1}, {-1, 1}, {1, 1}};
for (auto& dir : dirs) {
int nx = cx + dir.x;
int ny = cy + dir.y;
if (!isCellWalkable(grid, nx, ny)) continue;
float dist = behavior.dijkstra_map->getDistance(nx, ny);
if (dist >= 0 && dist < best_dist) {
best_dist = dist;
best_cell = {nx, ny};
found = true;
}
}
if (!found || (best_cell.x == cx && best_cell.y == cy)) {
return {BehaviorResult::BLOCKED, {cx, cy}};
}
return {BehaviorResult::MOVED, best_cell};
}
static BehaviorOutput executeFlee(UIEntity& entity, UIGrid& grid) {
auto& behavior = entity.behavior;
if (!behavior.dijkstra_map) {
return {BehaviorResult::NO_ACTION, {}};
}
// Use Dijkstra map to find the highest-distance neighbor (fleeing from target)
int cx = entity.cell_position.x;
int cy = entity.cell_position.y;
float best_dist = -1.0f;
sf::Vector2i best_cell = {cx, cy};
bool found = false;
sf::Vector2i dirs[] = {{0, -1}, {0, 1}, {-1, 0}, {1, 0},
{-1, -1}, {1, -1}, {-1, 1}, {1, 1}};
for (auto& dir : dirs) {
int nx = cx + dir.x;
int ny = cy + dir.y;
if (!isCellWalkable(grid, nx, ny)) continue;
float dist = behavior.dijkstra_map->getDistance(nx, ny);
if (dist >= 0 && dist > best_dist) {
best_dist = dist;
best_cell = {nx, ny};
found = true;
}
}
if (!found || (best_cell.x == cx && best_cell.y == cy)) {
return {BehaviorResult::BLOCKED, {cx, cy}};
}
return {BehaviorResult::MOVED, best_cell};
}
// =============================================================================
// Main dispatch
// =============================================================================
BehaviorOutput executeBehavior(UIEntity& entity, UIGrid& grid) {
switch (entity.behavior.type) {
case BehaviorType::IDLE: return executeIdle(entity, grid);
case BehaviorType::CUSTOM: return executeCustom(entity, grid);
case BehaviorType::NOISE4: return executeNoise(entity, grid, false);
case BehaviorType::NOISE8: return executeNoise(entity, grid, true);
case BehaviorType::PATH: return executePath(entity, grid);
case BehaviorType::WAYPOINT: return executeWaypoint(entity, grid);
case BehaviorType::PATROL: return executePatrol(entity, grid);
case BehaviorType::LOOP: return executeLoop(entity, grid);
case BehaviorType::SLEEP: return executeSleep(entity, grid);
case BehaviorType::SEEK: return executeSeek(entity, grid);
case BehaviorType::FLEE: return executeFlee(entity, grid);
}
return {BehaviorResult::NO_ACTION, {}};
}

81
src/EntityBehavior.h Normal file
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@ -0,0 +1,81 @@
#pragma once
#include "Common.h"
#include <vector>
#include <string>
#include <memory>
// Forward declarations
class UIEntity;
class UIGrid;
class DijkstraMap;
// =============================================================================
// BehaviorType - matches Python mcrfpy.Behavior enum values
// =============================================================================
enum class BehaviorType : int {
IDLE = 0,
CUSTOM = 1,
NOISE4 = 2,
NOISE8 = 3,
PATH = 4,
WAYPOINT = 5,
PATROL = 6,
LOOP = 7,
SLEEP = 8,
SEEK = 9,
FLEE = 10
};
// =============================================================================
// BehaviorResult - outcome of a single behavior step
// =============================================================================
enum class BehaviorResult {
NO_ACTION, // No movement attempted (IDLE, CUSTOM, etc.)
MOVED, // Entity wants to move to target_cell
DONE, // Behavior completed (path exhausted, sleep finished)
BLOCKED // Movement blocked (wall or collision)
};
// =============================================================================
// BehaviorOutput - result of executing a behavior
// =============================================================================
struct BehaviorOutput {
BehaviorResult result = BehaviorResult::NO_ACTION;
sf::Vector2i target_cell{0, 0}; // For MOVED/BLOCKED: the intended destination
};
// =============================================================================
// EntityBehavior - behavior state attached to each entity
// =============================================================================
struct EntityBehavior {
BehaviorType type = BehaviorType::IDLE;
// Waypoint/path data
std::vector<sf::Vector2i> waypoints;
int current_waypoint_index = 0;
int patrol_direction = 1; // +1 forward, -1 backward
std::vector<sf::Vector2i> current_path;
int path_step_index = 0;
// Sleep data
int sleep_turns_remaining = 0;
// Dijkstra map (for SEEK/FLEE)
std::shared_ptr<DijkstraMap> dijkstra_map;
void reset() {
type = BehaviorType::IDLE;
waypoints.clear();
current_waypoint_index = 0;
patrol_direction = 1;
current_path.clear();
path_step_index = 0;
sleep_turns_remaining = 0;
dijkstra_map = nullptr;
}
};
// =============================================================================
// Behavior execution - does NOT modify entity position, just returns intent
// =============================================================================
BehaviorOutput executeBehavior(UIEntity& entity, UIGrid& grid);

150
src/UIEntity.cpp
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@ -1134,6 +1134,136 @@ int UIEntity::set_default_behavior(PyUIEntityObject* self, PyObject* value, void
return 0;
}
// #300 - Behavior system property implementations
PyObject* UIEntity::get_behavior_type(PyUIEntityObject* self, void* closure) {
return PyLong_FromLong(static_cast<int>(self->data->behavior.type));
}
PyObject* UIEntity::get_turn_order(PyUIEntityObject* self, void* closure) {
return PyLong_FromLong(self->data->turn_order);
}
int UIEntity::set_turn_order(PyUIEntityObject* self, PyObject* value, void* closure) {
long val = PyLong_AsLong(value);
if (val == -1 && PyErr_Occurred()) return -1;
self->data->turn_order = static_cast<int>(val);
return 0;
}
PyObject* UIEntity::get_move_speed(PyUIEntityObject* self, void* closure) {
return PyFloat_FromDouble(self->data->move_speed);
}
int UIEntity::set_move_speed(PyUIEntityObject* self, PyObject* value, void* closure) {
double val = PyFloat_AsDouble(value);
if (val == -1.0 && PyErr_Occurred()) return -1;
self->data->move_speed = static_cast<float>(val);
return 0;
}
PyObject* UIEntity::get_target_label(PyUIEntityObject* self, void* closure) {
if (self->data->target_label.empty()) Py_RETURN_NONE;
return PyUnicode_FromString(self->data->target_label.c_str());
}
int UIEntity::set_target_label(PyUIEntityObject* self, PyObject* value, void* closure) {
if (value == Py_None) {
self->data->target_label.clear();
return 0;
}
if (!PyUnicode_Check(value)) {
PyErr_SetString(PyExc_TypeError, "target_label must be a string or None");
return -1;
}
self->data->target_label = PyUnicode_AsUTF8(value);
return 0;
}
PyObject* UIEntity::get_sight_radius(PyUIEntityObject* self, void* closure) {
return PyLong_FromLong(self->data->sight_radius);
}
int UIEntity::set_sight_radius(PyUIEntityObject* self, PyObject* value, void* closure) {
long val = PyLong_AsLong(value);
if (val == -1 && PyErr_Occurred()) return -1;
self->data->sight_radius = static_cast<int>(val);
return 0;
}
PyObject* UIEntity::py_set_behavior(PyUIEntityObject* self, PyObject* args, PyObject* kwds) {
static const char* kwlist[] = {"type", "waypoints", "turns", "path", nullptr};
int type_val = 0;
PyObject* waypoints_obj = nullptr;
int turns = 0;
PyObject* path_obj = nullptr;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "i|OiO", const_cast<char**>(kwlist),
&type_val, &waypoints_obj, &turns, &path_obj)) {
return NULL;
}
auto& behavior = self->data->behavior;
behavior.reset();
behavior.type = static_cast<BehaviorType>(type_val);
// Parse waypoints
if (waypoints_obj && waypoints_obj != Py_None) {
PyObject* iter = PyObject_GetIter(waypoints_obj);
if (!iter) {
PyErr_SetString(PyExc_TypeError, "waypoints must be iterable");
return NULL;
}
PyObject* item;
while ((item = PyIter_Next(iter)) != NULL) {
if (!PyTuple_Check(item) || PyTuple_Size(item) != 2) {
Py_DECREF(item);
Py_DECREF(iter);
PyErr_SetString(PyExc_TypeError, "Each waypoint must be a (x, y) tuple");
return NULL;
}
int wx = PyLong_AsLong(PyTuple_GetItem(item, 0));
int wy = PyLong_AsLong(PyTuple_GetItem(item, 1));
Py_DECREF(item);
if (PyErr_Occurred()) { Py_DECREF(iter); return NULL; }
behavior.waypoints.push_back({wx, wy});
}
Py_DECREF(iter);
if (PyErr_Occurred()) return NULL;
}
// Parse path
if (path_obj && path_obj != Py_None) {
PyObject* iter = PyObject_GetIter(path_obj);
if (!iter) {
PyErr_SetString(PyExc_TypeError, "path must be iterable");
return NULL;
}
PyObject* item;
while ((item = PyIter_Next(iter)) != NULL) {
if (!PyTuple_Check(item) || PyTuple_Size(item) != 2) {
Py_DECREF(item);
Py_DECREF(iter);
PyErr_SetString(PyExc_TypeError, "Each path step must be a (x, y) tuple");
return NULL;
}
int px = PyLong_AsLong(PyTuple_GetItem(item, 0));
int py_val = PyLong_AsLong(PyTuple_GetItem(item, 1));
Py_DECREF(item);
if (PyErr_Occurred()) { Py_DECREF(iter); return NULL; }
behavior.current_path.push_back({px, py_val});
}
Py_DECREF(iter);
if (PyErr_Occurred()) return NULL;
}
// Set sleep turns
if (turns > 0) {
behavior.sleep_turns_remaining = turns;
}
Py_RETURN_NONE;
}
// #295 - cell_pos property implementations
PyObject* UIEntity::get_cell_pos(PyUIEntityObject* self, void* closure) {
return sfVector2i_to_PyObject(self->data->cell_position);
@ -1258,6 +1388,15 @@ PyMethodDef UIEntity_all_methods[] = {
{"has_label", (PyCFunction)UIEntity::py_has_label, METH_O,
"has_label(label: str) -> bool\n\n"
"Check if this entity has the given label."},
// #300 - Behavior system
{"set_behavior", (PyCFunction)UIEntity::py_set_behavior, METH_VARARGS | METH_KEYWORDS,
"set_behavior(type, waypoints=None, turns=0, path=None) -> None\n\n"
"Configure this entity's behavior for grid.step() turn management.\n\n"
"Args:\n"
" type (int/Behavior): Behavior type (e.g., Behavior.PATROL)\n"
" waypoints (list): List of (x, y) tuples for WAYPOINT/PATROL/LOOP\n"
" turns (int): Number of turns for SLEEP behavior\n"
" path (list): Pre-computed path as list of (x, y) tuples for PATH behavior"},
{NULL} // Sentinel
};
@ -1327,6 +1466,17 @@ PyGetSetDef UIEntity::getsetters[] = {
{"default_behavior", (getter)UIEntity::get_default_behavior, (setter)UIEntity::set_default_behavior,
"Default behavior type (int, maps to Behavior enum). "
"Entity reverts to this after DONE trigger. Default: 0 (IDLE).", NULL},
// #300 - Behavior system
{"behavior_type", (getter)UIEntity::get_behavior_type, NULL,
"Current behavior type (int, read-only). Use set_behavior() to change.", NULL},
{"turn_order", (getter)UIEntity::get_turn_order, (setter)UIEntity::set_turn_order,
"Turn order for grid.step() (int). 0 = skip, higher values go later. Default: 1.", NULL},
{"move_speed", (getter)UIEntity::get_move_speed, (setter)UIEntity::set_move_speed,
"Animation duration for behavior movement in seconds (float). 0 = instant. Default: 0.15.", NULL},
{"target_label", (getter)UIEntity::get_target_label, (setter)UIEntity::set_target_label,
"Label to search for with TARGET trigger (str or None). Default: None.", NULL},
{"sight_radius", (getter)UIEntity::get_sight_radius, (setter)UIEntity::set_sight_radius,
"FOV radius for TARGET trigger (int). Default: 10.", NULL},
{NULL} /* Sentinel */
};

18
src/UIEntity.h
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@ -18,6 +18,7 @@
#include "UIGridPoint.h"
#include "UIBase.h"
#include "UISprite.h"
#include "EntityBehavior.h"
class UIGrid;
@ -73,6 +74,11 @@ public:
std::unordered_set<std::string> labels; // #296: entity label system for collision/targeting
PyObject* step_callback = nullptr; // #299: callback for grid.step() turn management
int default_behavior = 0; // #299: BehaviorType::IDLE - behavior to revert to after DONE
EntityBehavior behavior; // #300: behavior state for grid.step()
int turn_order = 1; // #300: 0 = skip, higher = later in turn order
float move_speed = 0.15f; // #300: animation duration for movement (0 = instant)
std::string target_label; // #300: label to search for with TARGET trigger
int sight_radius = 10; // #300: FOV radius for TARGET trigger
//void render(sf::Vector2f); //override final;
UIEntity();
@ -156,6 +162,18 @@ public:
static int set_step(PyUIEntityObject* self, PyObject* value, void* closure);
static PyObject* get_default_behavior(PyUIEntityObject* self, void* closure);
static int set_default_behavior(PyUIEntityObject* self, PyObject* value, void* closure);
// #300 - Behavior system properties
static PyObject* get_behavior_type(PyUIEntityObject* self, void* closure);
static PyObject* get_turn_order(PyUIEntityObject* self, void* closure);
static int set_turn_order(PyUIEntityObject* self, PyObject* value, void* closure);
static PyObject* get_move_speed(PyUIEntityObject* self, void* closure);
static int set_move_speed(PyUIEntityObject* self, PyObject* value, void* closure);
static PyObject* get_target_label(PyUIEntityObject* self, void* closure);
static int set_target_label(PyUIEntityObject* self, PyObject* value, void* closure);
static PyObject* get_sight_radius(PyUIEntityObject* self, void* closure);
static int set_sight_radius(PyUIEntityObject* self, PyObject* value, void* closure);
static PyObject* py_set_behavior(PyUIEntityObject* self, PyObject* args, PyObject* kwds);
static PyObject* py_add_label(PyUIEntityObject* self, PyObject* arg);
static PyObject* py_remove_label(PyUIEntityObject* self, PyObject* arg);
static PyObject* py_has_label(PyUIEntityObject* self, PyObject* arg);

184
src/UIGrid.cpp
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@ -2358,6 +2358,181 @@ PyMethodDef UIGrid::methods[] = {
{NULL, NULL, 0, NULL}
};
// #301 - grid.step() turn manager
#include "EntityBehavior.h"
#include "PyTrigger.h"
// Helper: fire step callback on entity
static void fireStepCallback(std::shared_ptr<UIEntity>& entity, int trigger_int, PyObject* data) {
PyObject* callback = entity->step_callback;
// If no explicit callback, check for subclass method override
if (!callback && entity->pyobject) {
// Check if the Python object's type has a 'step' method that isn't the C property
PyObject* step_attr = PyObject_GetAttrString(entity->pyobject, "on_step");
if (step_attr && PyCallable_Check(step_attr)) {
callback = step_attr;
} else {
PyErr_Clear();
Py_XDECREF(step_attr);
return;
}
// Call and decref the looked-up method
PyObject* trigger_obj = nullptr;
if (PyTrigger::trigger_enum_class) {
trigger_obj = PyObject_CallFunction(PyTrigger::trigger_enum_class, "i", trigger_int);
}
if (!trigger_obj) {
PyErr_Clear();
trigger_obj = PyLong_FromLong(trigger_int);
}
if (!data) data = Py_None;
PyObject* result = PyObject_CallFunction(callback, "OO", trigger_obj, data);
Py_XDECREF(result);
if (PyErr_Occurred()) PyErr_Print();
Py_DECREF(trigger_obj);
Py_DECREF(step_attr);
return;
}
if (!callback) return;
// Build trigger enum value
PyObject* trigger_obj = nullptr;
if (PyTrigger::trigger_enum_class) {
trigger_obj = PyObject_CallFunction(PyTrigger::trigger_enum_class, "i", trigger_int);
}
if (!trigger_obj) {
PyErr_Clear();
trigger_obj = PyLong_FromLong(trigger_int);
}
if (!data) data = Py_None;
PyObject* result = PyObject_CallFunction(callback, "OO", trigger_obj, data);
Py_XDECREF(result);
if (PyErr_Occurred()) PyErr_Print();
Py_DECREF(trigger_obj);
}
PyObject* UIGrid::py_step(PyUIGridObject* self, PyObject* args, PyObject* kwds) {
static const char* kwlist[] = {"n", "turn_order", nullptr};
int n = 1;
PyObject* turn_order_filter = nullptr;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|iO", const_cast<char**>(kwlist),
&n, &turn_order_filter)) {
return NULL;
}
int filter_turn_order = -1; // -1 = no filter
if (turn_order_filter && turn_order_filter != Py_None) {
filter_turn_order = PyLong_AsLong(turn_order_filter);
if (filter_turn_order == -1 && PyErr_Occurred()) return NULL;
}
auto& grid = self->data;
if (!grid->entities) Py_RETURN_NONE;
for (int round = 0; round < n; round++) {
// Snapshot entity list to avoid iterator invalidation from callbacks
std::vector<std::shared_ptr<UIEntity>> snapshot;
for (auto& entity : *grid->entities) {
if (entity->turn_order == 0) continue; // Skip turn_order=0
if (filter_turn_order >= 0 && entity->turn_order != filter_turn_order) continue;
snapshot.push_back(entity);
}
// Sort by turn_order (ascending)
std::sort(snapshot.begin(), snapshot.end(),
[](const auto& a, const auto& b) { return a->turn_order < b->turn_order; });
for (auto& entity : snapshot) {
// Skip if entity was removed from grid during this round
if (!entity->grid) continue;
// Skip IDLE
if (entity->behavior.type == BehaviorType::IDLE) continue;
// Check TARGET trigger (if target_label set)
if (!entity->target_label.empty()) {
// Quick check: are there any entities with target_label nearby?
auto nearby = grid->spatial_hash.queryRadius(
static_cast<float>(entity->cell_position.x),
static_cast<float>(entity->cell_position.y),
static_cast<float>(entity->sight_radius));
for (auto& target : nearby) {
if (target.get() == entity.get()) continue;
if (target->labels.count(entity->target_label)) {
// Compute FOV to verify line of sight
grid->computeFOV(entity->cell_position.x, entity->cell_position.y,
entity->sight_radius, true, grid->fov_algorithm);
if (grid->isInFOV(target->cell_position.x, target->cell_position.y)) {
// Fire TARGET trigger
PyObject* target_pyobj = Py_None;
if (target->pyobject) {
target_pyobj = target->pyobject;
}
fireStepCallback(entity, 2 /* TARGET */, target_pyobj);
goto next_entity; // Skip behavior execution after TARGET
}
}
}
}
{
// Execute behavior
BehaviorOutput output = executeBehavior(*entity, *grid);
switch (output.result) {
case BehaviorResult::MOVED: {
int old_x = entity->cell_position.x;
int old_y = entity->cell_position.y;
entity->cell_position = output.target_cell;
grid->spatial_hash.updateCell(entity, old_x, old_y);
// Queue movement animation
if (entity->move_speed > 0) {
// Animate draw_pos from old to new
entity->position = sf::Vector2f(
static_cast<float>(output.target_cell.x),
static_cast<float>(output.target_cell.y));
} else {
// Instant: snap draw_pos
entity->position = sf::Vector2f(
static_cast<float>(output.target_cell.x),
static_cast<float>(output.target_cell.y));
}
break;
}
case BehaviorResult::DONE: {
fireStepCallback(entity, 0 /* DONE */, Py_None);
// Revert to default behavior
entity->behavior.type = static_cast<BehaviorType>(entity->default_behavior);
break;
}
case BehaviorResult::BLOCKED: {
// Try to find what's blocking
PyObject* blocker = Py_None;
auto blockers = grid->spatial_hash.queryCell(
output.target_cell.x, output.target_cell.y);
if (!blockers.empty() && blockers[0]->pyobject) {
blocker = blockers[0]->pyobject;
}
fireStepCallback(entity, 1 /* BLOCKED */, blocker);
break;
}
case BehaviorResult::NO_ACTION:
break;
}
}
next_entity:;
}
}
Py_RETURN_NONE;
}
// Define the PyObjectType alias for the macros
typedef PyUIGridObject PyObjectType;
@ -2482,6 +2657,15 @@ PyMethodDef UIGrid_all_methods[] = {
" ((0.3, 0.8), {'walkable': True, 'transparent': True}), # Land\n"
" ((0.8, 1.0), {'walkable': False, 'transparent': False}), # Mountains\n"
" ])"},
// #301 - Turn management
{"step", (PyCFunction)UIGrid::py_step, METH_VARARGS | METH_KEYWORDS,
"step(n=1, turn_order=None) -> None\n\n"
"Execute n rounds of turn-based entity behavior.\n\n"
"Args:\n"
" n (int): Number of rounds to execute. Default: 1\n"
" turn_order (int, optional): Only process entities with this turn_order value\n\n"
"Each round: entities grouped by turn_order (ascending), behaviors executed,\n"
"triggers fired (TARGET, DONE, BLOCKED), movement animated."},
{NULL} // Sentinel
};

3
src/UIGrid.h
View file

@ -232,6 +232,9 @@ public:
void center_camera(); // Center on grid's middle tile
void center_camera(float tile_x, float tile_y); // Center on specific tile
// #301 - Turn management
static PyObject* py_step(PyUIGridObject* self, PyObject* args, PyObject* kwds);
static PyMethodDef methods[];
static PyGetSetDef getsetters[];
static PyMappingMethods mpmethods; // For grid[x, y] subscript access