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Getting started on exposing lua variables to Editor GUI

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This commit is contained in:
OusmBlueNinja 2024-12-31 12:13:36 -06:00
parent 29fecdd0eb
commit 9d653be08c
4 changed files with 245 additions and 37 deletions
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72
imgui.ini
View File

@ -93,9 +93,9 @@ DockId=0x0000001A,0
[Window][Lua Text Editor##LuaEditor] [Window][Lua Text Editor##LuaEditor]
Pos=523,793 Pos=523,793
Size=503,376 Size=1011,376
Collapsed=0 Collapsed=0
DockId=0x0000001D,0 DockId=0x00000018,0
[Window][Scene Window@SceneWindow] [Window][Scene Window@SceneWindow]
Pos=8,27 Pos=8,27
@ -116,10 +116,10 @@ Collapsed=0
DockId=0x00000011,0 DockId=0x00000011,0
[Window][Profiler] [Window][Profiler]
Pos=1028,793 Pos=523,793
Size=506,376 Size=1011,376
Collapsed=0 Collapsed=0
DockId=0x0000001E,0 DockId=0x00000018,1
[Table][0xE9E836E4,4] [Table][0xE9E836E4,4]
Column 0 Weight=1.2999 Column 0 Weight=1.2999
@ -128,36 +128,34 @@ Column 2 Weight=0.6474
Column 3 Weight=1.0088 Column 3 Weight=1.0088
[Docking][Data] [Docking][Data]
DockSpace ID=0x14621557 Window=0x3DA2F1DE Pos=8,50 Size=1904,1142 Split=X Selected=0xF7365A5A DockSpace ID=0x14621557 Window=0x3DA2F1DE Pos=8,50 Size=1904,1142 Split=X Selected=0xF7365A5A
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2
src/Componenets/ScriptComponent.cpp
View File

@ -80,6 +80,8 @@ bool ScriptComponent::Initialize()
return false; return false;
} }
m_LuaManager.PrintEngineVariables();
return true; return true;
} }

203
src/Engine/LuaAPI.cpp
View File

@ -150,6 +150,209 @@ bool LuaManager::Initialize(const std::string &scriptPath)
return true; return true;
} }
// Implementation of GetGlobalVariables
std::vector<LuaManager::LuaGlobalVariant> LuaManager::GetGlobalVariables()
{
std::vector<LuaManager::LuaGlobalVariant> globals;
if (!m_LuaState)
{
// Handle error: Lua state not initialized
if (g_LoggerWindow)
{
g_LoggerWindow->AddLog("LuaManager: Lua state is not initialized.",
std::optional<ImVec4>(ImVec4(1.0f, 0.0f, 0.0f, 1.0f)));
}
else
{
DEBUG_PRINT("LuaManager: Lua state is not initialized.");
}
return globals;
}
// Push the global table onto the stack
#if LUA_VERSION_NUM >= 502
lua_pushglobaltable(m_LuaState);
#else
lua_pushvalue(m_LuaState, LUA_GLOBALSINDEX);
#endif
// Start iterating with a nil key
lua_pushnil(m_LuaState); // First key
// Iterate over the global table
while (lua_next(m_LuaState, -2) != 0)
{
// Stack now contains key at -2 and value at -1
// Get the type of the value
int valueType = lua_type(m_LuaState, -1);
switch (valueType)
{
case LUA_TNUMBER:
#if LUA_VERSION_NUM >= 503
if (lua_isinteger(m_LuaState, -1))
{
lua_Integer intVal = lua_tointeger(m_LuaState, -1);
// Assuming you want to store as int
globals.emplace_back(static_cast<int>(intVal));
}
else
{
lua_Number numVal = lua_tonumber(m_LuaState, -1);
// Store as float (you might choose double instead)
globals.emplace_back(static_cast<float>(numVal));
}
#else
{
lua_Number numVal = lua_tonumber(m_LuaState, -1);
// Lua 5.2 and earlier use double for all numbers
// Decide how to store: here, stored as float
globals.emplace_back(static_cast<float>(numVal));
}
#endif
break;
case LUA_TSTRING:
{
size_t len = 0;
const char *str = lua_tolstring(m_LuaState, -1, &len);
if (str)
{
globals.emplace_back(std::string(str, len));
}
}
break;
// Optionally handle other types or skip them
// For example, you might skip tables, functions, booleans, etc.
default:
// Skip other types
break;
}
// Pop the value, keep the key for the next iteration
lua_pop(m_LuaState, 1);
}
// Pop the global table from the stack
lua_pop(m_LuaState, 1);
return globals;
}
// Implementation of PrintEngineVariables
void LuaManager::PrintEngineVariables() {
if (!m_LuaState) {
std::cerr << "LuaManager: Lua state is not initialized." << std::endl;
return;
}
// Push the _T_Engine_Variables table onto the stack
lua_getglobal(m_LuaState, "_T_Engine_Variables");
if (!lua_istable(m_LuaState, -1)) {
std::cerr << "LuaManager: _T_Engine_Variables is not a table or does not exist." << std::endl;
lua_pop(m_LuaState, 1); // Remove non-table value
return;
}
// Start iterating with a nil key
lua_pushnil(m_LuaState); // First key
std::cout << "Engine Variables:" << std::endl;
// Iterate over the _T_Engine_Variables table
while (lua_next(m_LuaState, -2) != 0) {
// Stack now contains key at -2 and value at -1
// Get the key
const char* key = nullptr;
if (lua_type(m_LuaState, -2) == LUA_TSTRING) {
key = lua_tostring(m_LuaState, -2);
} else {
// For non-string keys, skip
lua_pop(m_LuaState, 1); // Remove value, keep key for next iteration
continue;
}
// Get the type of the value
int valueType = lua_type(m_LuaState, -1);
// Print the key and value based on type
std::cout << key << " = ";
switch (valueType) {
case LUA_TNUMBER:
#if LUA_VERSION_NUM >= 503
if (lua_isinteger(m_LuaState, -1)) {
lua_Integer intVal = lua_tointeger(m_LuaState, -1);
std::cout << intVal;
} else
#endif
{
lua_Number numVal = lua_tonumber(m_LuaState, -1);
std::cout << numVal;
}
break;
case LUA_TSTRING:
{
const char* str = lua_tostring(m_LuaState, -1);
if (str) {
std::cout << "\"" << str << "\"";
} else {
std::cout << "nil";
}
}
break;
case LUA_TBOOLEAN:
{
int boolVal = lua_toboolean(m_LuaState, -1);
std::cout << (boolVal ? "true" : "false");
}
break;
case LUA_TTABLE:
std::cout << "table";
break;
case LUA_TFUNCTION:
std::cout << "function";
break;
case LUA_TUSERDATA:
std::cout << "userdata";
break;
case LUA_TLIGHTUSERDATA:
std::cout << "lightuserdata";
break;
case LUA_TTHREAD:
std::cout << "thread";
break;
case LUA_TNIL:
std::cout << "nil";
break;
default:
std::cout << "unknown";
break;
}
std::cout << std::endl;
// Pop the value, keep the key for the next iteration
lua_pop(m_LuaState, 1);
}
// Pop the _T_Engine_Variables table from the stack
lua_pop(m_LuaState, 1);
}
// Update function called every frame // Update function called every frame
void LuaManager::Update(float deltaTime) void LuaManager::Update(float deltaTime)
{ {

5
src/Engine/LuaAPI.h
View File

@ -13,6 +13,8 @@ extern "C"
// Include standard libraries // Include standard libraries
#include <string> #include <string>
#include <optional> #include <optional>
#include <variant>
#include <vector>
// Forward declarations to avoid circular dependencies // Forward declarations to avoid circular dependencies
class Component; class Component;
@ -57,7 +59,10 @@ public:
void CallLuaFunction(std::string functionName); void CallLuaFunction(std::string functionName);
using LuaGlobalVariant = std::variant<int, float, std::string>;
std::vector<LuaGlobalVariant> GetGlobalVariables();
void PrintEngineVariables();
private: private:
// Lua state // Lua state