CoreAPI initialization hooked up to WrenState

Foreign method binding system setup

docs/tasks/editor.todo

@@ -1,5 +1,8 @@
 
 Editor:  
+    ☐ Generate boiler-plate code when a new script is created
+        ☐ Include setting the entity ID
+        
     ☐ Add pure virtual ShowProperties method to EditorAsset
     ✔ Script Editor Asset @done(22-11-14 18:19)
     ✔ Editor Assets need to switch to using UUIDs @critical @done(22-11-02 18:51)

scripts/build.bat

@@ -36,7 +36,7 @@ IF NOT "!BUILD_ERRORLEVEL!"=="0" (
 
 
 xcopy /y test_data\engine_state.json build\Release\
-xcopy /y test_data\world_interface.wren build\Release\
+xcopy /y src\scripting\internal_scripts\*.wren build\Release\
 xcopy /y src\renderer\shaders\* build\Release\*
 
 
@@ -51,7 +51,7 @@ IF NOT "!BUILD_ERRORLEVEL!"=="0" (
 
 
 xcopy /y test_data\engine_state.json build\RelWithDebInfo\
-xcopy /y test_data\world_interface.wren build\RelWithDebInfo\
+xcopy /y src\scripting\internal_scripts\*.wren build\RelWithDebInfo\
 xcopy /y src\renderer\shaders\* build\RelWithDebInfo\*
 
 ) ELSE (
@@ -65,7 +65,7 @@ IF NOT "!BUILD_ERRORLEVEL!"=="0" (
 
 
 xcopy /y test_data\engine_state.json build\Debug\
-xcopy /y test_data\world_interface.wren build\Debug\
+xcopy /y src\scripting\internal_scripts\*.wren build\Debug\
 xcopy /y src\renderer\shaders\* build\Debug\*
 
 )

src/platform/key_codes.h

@@ -12,6 +12,7 @@
 
 #include "window.h"
 #include <vector>
+#include <map>
 
 namespace lunarium
 {
@@ -221,6 +222,95 @@ namespace lunarium
 		KeyCode::MOUSE_X1_BUTTON,
 		KeyCode::MOUSE_X2_BUTTON
 	};
+
+	static std::map<std::string, KeyCode> KeyCodeMap = 
+	{
+		std::pair<std::string, KeyCode> {"A", KeyCode::A},
+		std::pair<std::string, KeyCode> {"B", KeyCode::B},
+		std::pair<std::string, KeyCode> {"C", KeyCode::C},
+		std::pair<std::string, KeyCode> {"D", KeyCode::D},
+		std::pair<std::string, KeyCode> {"E", KeyCode::E},
+		std::pair<std::string, KeyCode> {"F", KeyCode::F},
+		std::pair<std::string, KeyCode> {"G", KeyCode::G},
+		std::pair<std::string, KeyCode> {"H", KeyCode::H},
+		std::pair<std::string, KeyCode> {"I", KeyCode::I},
+		std::pair<std::string, KeyCode> {"J", KeyCode::J},
+		std::pair<std::string, KeyCode> {"K", KeyCode::K},
+		std::pair<std::string, KeyCode> {"L", KeyCode::L},
+		std::pair<std::string, KeyCode> {"M", KeyCode::M},
+		std::pair<std::string, KeyCode> {"N", KeyCode::N},
+		std::pair<std::string, KeyCode> {"O", KeyCode::O},
+		std::pair<std::string, KeyCode> {"P", KeyCode::P},
+		std::pair<std::string, KeyCode> {"Q", KeyCode::Q},
+		std::pair<std::string, KeyCode> {"R", KeyCode::R},
+		std::pair<std::string, KeyCode> {"S", KeyCode::S},
+		std::pair<std::string, KeyCode> {"T", KeyCode::T},
+		std::pair<std::string, KeyCode> {"U", KeyCode::U},
+		std::pair<std::string, KeyCode> {"V", KeyCode::V},
+		std::pair<std::string, KeyCode> {"W", KeyCode::W},
+		std::pair<std::string, KeyCode> {"X", KeyCode::X},
+		std::pair<std::string, KeyCode> {"Y", KeyCode::Y},
+		std::pair<std::string, KeyCode> {"Z", KeyCode::Z},
+		
+		std::pair<std::string, KeyCode> {"NUM_0", KeyCode::NUM_0},
+		std::pair<std::string, KeyCode> {"NUM_1", KeyCode::NUM_1},
+		std::pair<std::string, KeyCode> {"NUM_2", KeyCode::NUM_2},
+		std::pair<std::string, KeyCode> {"NUM_3", KeyCode::NUM_3},
+		std::pair<std::string, KeyCode> {"NUM_4", KeyCode::NUM_4},
+		std::pair<std::string, KeyCode> {"NUM_5", KeyCode::NUM_5},
+		std::pair<std::string, KeyCode> {"NUM_6", KeyCode::NUM_6},
+		std::pair<std::string, KeyCode> {"NUM_7", KeyCode::NUM_7},
+		std::pair<std::string, KeyCode> {"NUM_8", KeyCode::NUM_8},
+		std::pair<std::string, KeyCode> {"NUM_9", KeyCode::NUM_9},
+		
+		std::pair<std::string, KeyCode> {"F1", KeyCode::F1},
+		std::pair<std::string, KeyCode> {"F2", KeyCode::F2},
+		std::pair<std::string, KeyCode> {"F3", KeyCode::F3},
+		std::pair<std::string, KeyCode> {"F4", KeyCode::F4},
+		std::pair<std::string, KeyCode> {"F5", KeyCode::F5},
+		std::pair<std::string, KeyCode> {"F6", KeyCode::F6},
+		std::pair<std::string, KeyCode> {"F7", KeyCode::F7},
+		std::pair<std::string, KeyCode> {"F8", KeyCode::F8},
+		std::pair<std::string, KeyCode> {"F9", KeyCode::F9},
+		std::pair<std::string, KeyCode> {"F10", KeyCode::F10},
+		std::pair<std::string, KeyCode> {"F11", KeyCode::F11},
+		std::pair<std::string, KeyCode> {"F12", KeyCode::F12},
+		
+		std::pair<std::string, KeyCode> {"LSHIFT", KeyCode::LSHIFT},
+		std::pair<std::string, KeyCode> {"RSHIFT", KeyCode::RSHIFT},
+		std::pair<std::string, KeyCode> {"LCONTROL", KeyCode::LCONTROL},
+		std::pair<std::string, KeyCode> {"RCONTROL", KeyCode::RCONTROL},
+		std::pair<std::string, KeyCode> {"LALT", KeyCode::LALT},
+		std::pair<std::string, KeyCode> {"RALT", KeyCode::RALT},
+		std::pair<std::string, KeyCode> {"SPACE", KeyCode::SPACE},
+		std::pair<std::string, KeyCode> {"LEFT", KeyCode::LEFT},
+		std::pair<std::string, KeyCode> {"UP", KeyCode::UP},
+		std::pair<std::string, KeyCode> {"RIGHT", KeyCode::RIGHT},
+		std::pair<std::string, KeyCode> {"DOWN", KeyCode::DOWN},
+		std::pair<std::string, KeyCode> {"DEL", KeyCode::DEL},
+		std::pair<std::string, KeyCode> {"RETURN", KeyCode::RETURN},
+		std::pair<std::string, KeyCode> {"BACKSPACE", KeyCode::BACKSPACE},
+		std::pair<std::string, KeyCode> {"TAB", KeyCode::TAB},
+		std::pair<std::string, KeyCode> {"ESCAPE", KeyCode::ESCAPE},
+		std::pair<std::string, KeyCode> {"PAGE_UP", KeyCode::PAGE_UP},
+		std::pair<std::string, KeyCode> {"PAGE_DOWN", KeyCode::PAGE_DOWN},
+		std::pair<std::string, KeyCode> {"SEMICOLON", KeyCode::SEMICOLON},		
+		std::pair<std::string, KeyCode> {"EQUALS", KeyCode::EQUALS},			
+		std::pair<std::string, KeyCode> {"COMMA", KeyCode::COMMA},					
+		std::pair<std::string, KeyCode> {"DASH", KeyCode::DASH},					
+		std::pair<std::string, KeyCode> {"DOT", KeyCode::DOT},					
+		std::pair<std::string, KeyCode> {"FORWARD_SLASH", KeyCode::FORWARD_SLASH},   		
+		std::pair<std::string, KeyCode> {"TILDE", KeyCode::TILDE},			
+		std::pair<std::string, KeyCode> {"OPEN_BRACKET", KeyCode::OPEN_BRACKET},	
+		std::pair<std::string, KeyCode> {"BACKSLASH", KeyCode::BACKSLASH},			
+		std::pair<std::string, KeyCode> {"CLOSE_BRACKET", KeyCode::CLOSE_BRACKET},	
+		std::pair<std::string, KeyCode> {"QUOTE", KeyCode::QUOTE},			
+		std::pair<std::string, KeyCode> {"MOUSE_LEFT_BUTTON", KeyCode::MOUSE_LEFT_BUTTON},
+		std::pair<std::string, KeyCode> {"MOUSE_RIGHT_BUTTON", KeyCode::MOUSE_RIGHT_BUTTON},
+		std::pair<std::string, KeyCode> {"MOUSE_MIDDLE_BUTTON", KeyCode::MOUSE_MIDDLE_BUTTON},
+		std::pair<std::string, KeyCode> {"MOUSE_X1_BUTTON", KeyCode::MOUSE_X1_BUTTON},
+		std::pair<std::string, KeyCode> {"MOUSE_X2_BUTTON", KeyCode::MOUSE_X2_BUTTON}
+	};
 }
 
 

src/scripting/coreAPI.cpp

@@ -11,12 +11,15 @@
 #include "coreAPI.h"
 #include "wren_state.h"
 #include <core/core.h>
+#include <platform/key_codes.h>
 #include <utils/logger.h>
+#include <utils/helpers.h>
 
 namespace lunarium
 {
-    
     CoreAPI* CoreAPI::mpInstance = nullptr;
+    WrenScript CoreAPI::mScript;
+    std::vector<CoreAPI::ForeignMethodID> CoreAPI::mForeignMethods;
     CoreAPI& CoreAPI::GetInstance()
     {
         if (mpInstance == nullptr)
@@ -37,14 +40,62 @@ namespace lunarium
     {
         mCat = sman.GetLogCat();
 
+        // Register callbacks
+        sman.RegisterForeignMethodBinder((FMBinder*)&CoreAPI::ForeignMethodBinder);
+
+        // Generate Code
+        std::string keys_script = GenerateWrenKeyCodes();
+        sman.RunSnippet("KeyCodes", keys_script);
+
+            // DEBUG - SAVE GENERATED SCRIPT TO FILE FOR REVIEW
+            File::WriteTextFile("key_codes.wren", keys_script);
+
+
+        // Load Main Script
+        mScript.SetModuleName("CoreAPI");
+        std::string code = File::ReadTextFile("core_api.wren");  // This will eventually move to internal data
+        mScript.SetScriptCode(code);
+
         // Register methods
-        // sman.mState["SetWindowSize"] = &CoreAPI::SetWindowSize;
-        // sman.mState["Log"] = &CoreAPI::Log;
 
        // return OpRes::Fail("CoreAPI::Initialize not implemented yet!");
        return OpRes::OK();
     }
 
+    WrenForeignMethodFn CoreAPI::ForeignMethodBinder(WrenVM* vm, const char* module, const char* class_name, bool isStatic, const char* signature)
+    {
+        ForeignMethodID FMID = { module, class_name, isStatic, signature };
+
+        for (auto iter = mForeignMethods.begin(); iter != mForeignMethods.end(); iter++)
+        {
+            if (FMID == (*iter))
+            {
+                iter->FM;
+            }
+        }
+
+        return nullptr;
+    }
+
+    
+    std::string CoreAPI::GenerateWrenKeyCodes()
+    {
+        std::string key_codes = "class KeyCodes {\n";
+
+        for (auto iter = KeyCodeMap.begin(); iter != KeyCodeMap.end(); iter++)
+        {
+            key_codes += "\tstatic ";
+            key_codes += iter->first;
+            key_codes += "() { ";
+            key_codes += std::to_string((u32)iter->second);
+            key_codes += " }\n";
+        }
+
+        key_codes += "}";
+
+        return key_codes;
+    }
+
     ////////////////////////////////////////////////////////////
     //				API
     ////////////////////////////////////////////////////////////
@@ -66,4 +117,9 @@ namespace lunarium
             default:                    { Logger::Trace(mpInstance->mCat, msg); break; }
         }
     }
+    
+    bool CoreAPI::IsKeyDown(WrenVM* vm)
+    {
+        return false;
+    }
 }

src/scripting/coreAPI.h

@@ -12,8 +12,12 @@
 #define CORE_API_H_
 
 #include <core/common_defs.h>
+#include "wren_script.h"
 #include <utils/op_res.h>
+#include <input/input_manager.h>
+#include <map>
 
+struct WrenVM;
 
 namespace lunarium
 {
@@ -27,15 +31,42 @@ namespace lunarium
 
         OpRes Initialize(WrenState& state);
 
+
     private:
         static CoreAPI* mpInstance;
+        static WrenScript mScript;
         u32 mCat;
 
+        typedef void (*ForeignMethod)(WrenVM*);
+        struct ForeignMethodID
+        {
+            std::string Module;
+            std::string Class;
+            bool IsStatic;
+            std::string Signature;
+            ForeignMethod FM;
+
+            bool operator==(const ForeignMethodID& rhs)
+            {
+                return (Module == rhs.Module && Class == rhs.Class && IsStatic == rhs.IsStatic && Signature == rhs.Signature);
+            }
+        };
+
+        static std::vector<ForeignMethodID> mForeignMethods;
+
+    private: // Helper methods
+        std::string GenerateWrenKeyCodes();
+
+    private: // Callbacks
+        static ForeignMethod ForeignMethodBinder(WrenVM* vm, const char* module, const char* className, bool isStatic, const char* signature);
+
     public: // API
 
         static void SetWindowSize(int w, int h);
         static void Log(int level, const char* msg);
 
+        static bool IsKeyDown(WrenVM* vm);
+
     };
 }
 

src/scripting/internal_scripts/components.wren

@@ -0,0 +1,27 @@
+/******************************************************************************
+*	File		-	components.wren
+*	Author		-	Joey Pollack
+*	Date		-	2022/11/17 (y/m/d)
+*	Mod Date	-	2022/11/17 (y/m/d)
+*	Description	-	The foreign classes for components
+******************************************************************************/
+
+class Component {
+    EntityID { _EntityID }
+    EntityID=(value) { 
+        _EntityID = value 
+    }
+}
+
+foreign class VelocityComponent is Component {
+
+    // The parameter will be used on the C++ side to set the correct C++ component
+    construct new(entity_id) {
+        super.EntityID = entity_id
+    }
+
+    // maybe wrap these in non-foreign methods 
+    // to abstract pulling data out of slots?
+    foreign GetVelocity() 
+    foreign SetVelocity(x, y)
+}

src/scripting/internal_scripts/core_api.wren

@@ -0,0 +1,11 @@
+/******************************************************************************
+*	File		-	core_api.wren
+*	Author		-	Joey Pollack
+*	Date		-	2022/11/21 (y/m/d)
+*	Mod Date	-	2022/11/21 (y/m/d)
+*	Description	-	The Core API exposes core Lunarium features to scripts
+******************************************************************************/
+
+class Core {
+    //foreign static IsKeyDown(key)
+}

src/scripting/internal_scripts/world_interface.wren

@@ -6,6 +6,15 @@
 *	Description	-	The main interface for scripts to interact with the game world
 ******************************************************************************/
 
+class Component {
+    Tag { 1 }
+    Transform { 2 }
+    Velocity { 3 }
+    Camera { 4 }
+    BlockOut { 5 }
+    Script { 6 }
+}
+
 // Manages all of the EntityBehaviors
 class WorldInterface {
 
@@ -14,6 +23,10 @@ class WorldInterface {
         System.print("WorldInterface initialized")
     }
 
+    /////////////////////////////////////////////////////////////////////
+    //				EVENTS
+    /////////////////////////////////////////////////////////////////////
+
     static RegisterBehavior(behavior) {
         __Behaviors.add(behavior)
         // behavior.OnLoad()
@@ -37,11 +50,25 @@ class WorldInterface {
             behavior.Update(dt)
         }
     }
+
+    /////////////////////////////////////////////////////////////////////
+    //				API
+    /////////////////////////////////////////////////////////////////////
+
+    static GetComponent(entity_id, component_id) {
+
+    }
 }
 
 
 
 class EntityBehavior {
+
+    EntityID { _EntityID }
+    EntityID=(value) {
+        _EntityID = value
+    }
+
     OnLoad() {
 
     }

src/scripting/wren_state.cpp

@@ -9,11 +9,13 @@
 
 #include "wren_state.h"
 #include "wren_script.h"
+#include "coreAPI.h"
 #include <utils/logger.h>
 #include <utils/helpers.h>
 
 namespace lunarium
 {
+    std::vector<FMBinder*> WrenState::mFMBinders;
     
     WrenState::~WrenState()
     {
@@ -36,6 +38,8 @@ namespace lunarium
 
 	    mpVM = wrenNewVM(&config);
 
+        CoreAPI::GetInstance().Initialize(*this);
+
         return OpRes::OK();
     }
 
@@ -44,6 +48,15 @@ namespace lunarium
         return mLogCat;
     }
 
+    void WrenState::RegisterForeignMethodBinder(FMBinder* binder_method)
+    {
+        mFMBinders.push_back(binder_method);
+    }
+
+    /////////////////////////////////////////////////////////////////////
+    //				HANDLES
+    /////////////////////////////////////////////////////////////////////
+
     WrenHandle* WrenState::GetWrenClassHandle(std::string from_module, std::string class_name)
     {
         // Load the class into slot 0.
@@ -90,6 +103,9 @@ namespace lunarium
         wrenReleaseHandle(mpVM, handle);
     }
 
+    /////////////////////////////////////////////////////////////////////
+    //				CODE PROCESSING
+    /////////////////////////////////////////////////////////////////////
     
     void WrenState::RunScript(WrenScript* script)
     {
@@ -127,6 +143,9 @@ namespace lunarium
         }
     }
 
+    /////////////////////////////////////////////////////////////////////
+    //				VM CALLBACK METHODS
+    /////////////////////////////////////////////////////////////////////
     
     void WrenState::WriteFN(WrenVM* vm, const char* text)
     {
@@ -155,4 +174,23 @@ namespace lunarium
             break;
         }
     }
+
+    
+    WrenForeignMethodFn WrenState::BindForeignMethodFN(WrenVM* vm, const char* module, const char* className, bool isStatic, const char* signature)
+    {
+        // Bind methods
+
+        // If method not recognized, call any registered FMBinder methods
+        for (auto iter = mFMBinders.begin(); iter != mFMBinders.end(); iter++)
+        {
+            auto FN = ((FMBinder)(*iter))(vm, module, className, isStatic, signature);
+            if (FN)
+            {
+                return FN;
+            }
+        }
+
+        Logger::Error(mLogCat, "Failed to bind foreign method: %s::%s", className, signature);
+        return nullptr;
+    }
 }

src/scripting/wren_state.h

@@ -42,6 +42,8 @@ namespace lunarium
 
     class WrenScript;
 
+    typedef WrenForeignMethodFn (*FMBinder) (WrenVM*, const char*, const char*, bool, const char*);
+
     class WrenState
     {
     public:
@@ -50,6 +52,8 @@ namespace lunarium
         void Shutdown();
         u32 GetLogCat() const;
 
+        void RegisterForeignMethodBinder(FMBinder* binder_method);
+
         void RunScript(WrenScript* script);
         void RunSnippet(std::string name, std::string code);
 
@@ -61,12 +65,14 @@ namespace lunarium
     // CALL BACKS
     static void WriteFN(WrenVM* vm, const char* text);
     static void ErrorFN(WrenVM* vm, WrenErrorType type, const char* module, int line, const char* message);
+    static WrenForeignMethodFn BindForeignMethodFN(WrenVM* vm, const char* module, const char* className, bool isStatic, const char* signature);
 
 
 
     private:
         static u32 mLogCat;
         WrenVM* mpVM;
+        static std::vector<FMBinder*> mFMBinders;
 
     };
 }

src/utils/helpers.cpp

@@ -338,26 +338,22 @@ namespace lunarium
 	}
 
 	
-	std::string File::ReadScriptFile(std::string filename)
+	void File::WriteTextFile(std::string filename, std::string text, bool truncate)
 	{
-		std::ifstream ifs(filename);
-		if (!ifs.is_open())
-		{
-			Logger::Error(LogCategory::UTILITIES, "Could not open file: %s", filename.c_str());
-			return "";
-		}
+		std::ofstream ofs;
+		if (truncate)
+			ofs.open(filename, std::ios_base::trunc);
+		else
+			ofs.open(filename, std::ios_base::app);
 
-		std::string contents;
-		while (ifs)
+		if (!ofs.is_open())
 		{
-			contents += ifs.get();
+			Logger::Error(LogCategory::UTILITIES, "Could not open file: %s", filename.c_str());
 		}
 
-		contents.erase(contents.end() - 1);
+		ofs.write(text.c_str(), text.size());
 
-		ifs.close();
-		ifs.clear();
-
-		return contents;
+		ofs.close();
+		ofs.clear();
 	}
 }

src/utils/helpers.h

@@ -96,7 +96,7 @@ namespace lunarium
     {
     public:
         static std::string ReadTextFile(std::string filename);
-        static std::string ReadScriptFile(std::string filename);
+        static void WriteTextFile(std::string filename, std::string text, bool truncate = true);
     };
 }
 

src/world/world.cpp

@@ -77,22 +77,18 @@ namespace lunarium
 #if !BUILD_NO_EDITOR
 
             editor::Script* pScript = (editor::Script*) editor::ContentManager::GetInstance().GetAsset(script_comp.ScriptID);
-
             WrenScript script(pScript->GetScriptFile().filename().string().c_str(), pScript->GetScript());
-
             mScriptState.RunScript(&script);
 #endif
         }
 
         // Call OnLoad for each registered EntityBehavior class object
-        //mScriptState.RunSnippet("WorldInterface", "WorldInterface.DoOnLoad()");
         mScriptState.CallWrenMethod(mWIDoOnLoadMethod, mWIHandle, {}, "WorldInterface.DoOnLoad()");
     }
     
     void World::OnUnload()
     {
         // TODO: Call OnUnLoad for each registered EntityBehavior class object
-        //mScriptState.RunSnippet("WorldInterface", "WorldInterface.DoOnUnload()");
         mScriptState.CallWrenMethod(mWIDoOnUnloadMethod, mWIHandle, {}, "WorldInterface.DoOnUnload()");
         mScriptState.Shutdown();
     }
@@ -110,13 +106,8 @@ namespace lunarium
     void World::Update(float dt)
     {
         // Update all scripts
-        // Call OnUpdate for each registered EntityBehavior class object
-        // std::string code = "WorldInterface.Update(";
-        // code.append(std::to_string(dt));
-        // code.append(")");
-        // mScriptState.RunSnippet("WorldInterface", code);
+        // Call Update for each registered EntityBehavior class object
         mScriptState.CallWrenMethod(mWIUpdateMethod, mWIHandle, { {WrenParamType::WPT_DOUBLE, (double)dt} }, "WorldInterface.Update(dt)");
-       
 
 
         // Update Transforms for any enity with a velocity