Adding scripts

src/Game.cpp

@@ -178,17 +178,24 @@ namespace ZL
 
 		auto defaultTexture = std::make_shared<Texture>(CreateTextureDataFromPng("resources/w/default_skin001.png", CONST_ZIP_FILE));
 
-		auto zombie = std::make_unique<Character>();
-		zombie->loadAnimation(AnimationState::IDLE, "resources/w/default_idle002.txt", CONST_ZIP_FILE);
-		zombie->setTexture(defaultTexture);
-		zombie->walkSpeed = 1.5f;
-		zombie->rotationSpeed = 2.0f;
-		zombie->modelScale = 0.01f;
-		zombie->position = Eigen::Vector3f(0.f, 0.f, -15.f);
-		zombie->setTarget(zombie->position);
-		npcs.push_back(std::move(zombie));
+		auto npc01 = std::make_unique<Character>();
+		npc01->loadAnimation(AnimationState::IDLE, "resources/w/default_idle002.txt", CONST_ZIP_FILE);
+		npc01->loadAnimation(AnimationState::WALK, "resources/w/default_walk001.txt", CONST_ZIP_FILE);
+		npc01->setTexture(defaultTexture);
+		npc01->walkSpeed = 1.5f;
+		npc01->rotationSpeed = 2.0f;
+		npc01->modelScale = 0.01f;
+		npc01->modelCorrectionRotation = Eigen::Quaternionf(Eigen::AngleAxisf(M_PI, Eigen::Vector3f::UnitY()));
+			/*
+			Eigen::Quaternionf(Eigen::AngleAxisf(-M_PI * 0.5f, Eigen::Vector3f::UnitX())) *
+			Eigen::Quaternionf(Eigen::AngleAxisf(M_PI, Eigen::Vector3f::UnitZ()));*/
+		npc01->position = Eigen::Vector3f(0.f, 0.f, -45.f);
+		npc01->setTarget(npc01->position);
+		npcs.push_back(std::move(npc01));
 
 		loadingCompleted = true;
+
+		scriptEngine.init(this);
 	}
 
 	

src/Game.h

@@ -16,6 +16,7 @@
 #include <cstdint>
 #include <render/TextRenderer.h>
 #include "MenuManager.h"
+#include "ScriptEngine.h"
 
 #include <unordered_set>
 
@@ -93,6 +94,7 @@ namespace ZL {
 		static const size_t CONST_MAX_TIME_INTERVAL = 1000;
 
 		MenuManager menuManager;
+		ScriptEngine scriptEngine;
 	};
 
 

src/ScriptEngine.cpp

@@ -0,0 +1,62 @@
+#include "ScriptEngine.h"
+#include "Game.h"
+#include <pybind11/embed.h>
+#include <iostream>
+#include <fstream>
+
+namespace py = pybind11;
+
+// Static pointer used by the embedded module (set before interpreter starts).
+static ZL::Game* s_game = nullptr;
+
+// The embedded module must be defined at file scope before the interpreter
+// is started.  It exposes a minimal surface: one function per scripting command.
+PYBIND11_EMBEDDED_MODULE(game_api, m) {
+    m.doc() = "Game scripting API";
+
+    // npc_walk_to(index, x, y, z)
+    // Tells the NPC at `index` in Game::npcs to walk to world position (x,y,z).
+    m.def("npc_walk_to", [](int index, float x, float y, float z) {
+        if (!s_game) {
+            std::cerr << "[script] game_api.npc_walk_to: engine not ready\n";
+            return;
+        }
+        auto& npcs = s_game->npcs;
+        if (index < 0 || index >= static_cast<int>(npcs.size())) {
+            std::cerr << "[script] game_api.npc_walk_to: index " << index
+                      << " out of range (0.." << npcs.size() - 1 << ")\n";
+            return;
+        }
+        npcs[index]->setTarget(Eigen::Vector3f(x, y, z));
+    },
+    py::arg("index"), py::arg("x"), py::arg("y"), py::arg("z"),
+    "Command NPC[index] to walk to world position (x, y, z).");
+}
+
+namespace ZL {
+
+ScriptEngine::ScriptEngine() = default;
+ScriptEngine::~ScriptEngine() = default;
+
+void ScriptEngine::init(Game* game) {
+    s_game = game;
+    interpreter = std::make_unique<py::scoped_interpreter>();
+    runScript("resources/start.py");
+}
+
+void ScriptEngine::runScript(const std::string& path) {
+    std::ifstream file(path);
+    if (!file.is_open()) {
+        std::cerr << "[script] Could not open script: " << path << "\n";
+        return;
+    }
+    std::string source((std::istreambuf_iterator<char>(file)),
+                        std::istreambuf_iterator<char>());
+    try {
+        py::exec(source);
+    } catch (const py::error_already_set& e) {
+        std::cerr << "[script] Error in " << path << ":\n" << e.what() << "\n";
+    }
+}
+
+} // namespace ZL

src/ScriptEngine.h

@@ -0,0 +1,27 @@
+#pragma once
+#include <string>
+#include <memory>
+
+// Forward-declare the heavy pybind11 type so including this header stays cheap.
+namespace pybind11 { class scoped_interpreter; }
+
+namespace ZL {
+
+class Game;
+
+class ScriptEngine {
+public:
+    ScriptEngine();
+    ~ScriptEngine();
+
+    // Must be called once, after the Game's NPCs are ready.
+    void init(Game* game);
+
+    // Execute a Python script file. Logs errors to stderr.
+    void runScript(const std::string& path);
+
+private:
+    std::unique_ptr<pybind11::scoped_interpreter> interpreter;
+};
+
+} // namespace ZL