Assets/CollisionTags.SHConfig

@@ -0,0 +1,20 @@
+0 	1
+1 	2
+2 	3
+3 	4
+4 	5
+5 	6
+6 	7
+7 	8
+8 	9
+9 	10
+10 	11
+11 	12
+12 	13
+13 	14
+14 	15
+15 	16
+
+note: 
+All collision tags should follow the above format "index<space>tag name". 
+If it fails to follow this, the default tag names will be used.

SHADE_Engine/src/Physics/Collision/SHCollisionTags.cpp

@@ -9,12 +9,12 @@
 ****************************************************************************************/
 
 #include <SHpch.h>
+#include <fstream>
 
 // Primary Header
 #include "SHCollisionTags.h"
 // Project Headers
-#include "SHCollisionTags.h"
-
+#include "Tools/FileIO/SHFileIO.h"
 #include "Tools/Utilities/SHUtilities.h"
 
 namespace SHADE
@@ -136,15 +136,140 @@ namespace SHADE
 
   void SHCollisionTag::Init(const std::filesystem::path& tagNameFilePath) noexcept
   {
-    // Read tag names from given file.
+    /**
+      * I HATE FILE IO
+      *
+      * Each line in the file should be "index<space>tag name".
+      * If the line fails to follow this format, use the default tag name (index + 1)
+      */
+
+    // Populate tag names with default
+    for (int i = 0; i < NUM_TAGS; ++i)
+      tagNames[i] = std::to_string(i + 1);
+
+    std::ifstream collisionTagNamesFile { tagNameFilePath };
+
+    if (!collisionTagNamesFile.is_open())
+    {
+      SHLOG_ERROR("Failed to open file for Collision Tag Names! Default tag names used!")
+      return;
+    }
+
+    std::stringstream ss;
+    std::string line;
+
+    int linesRead = 0;
+    while (std::getline(collisionTagNamesFile, line))
+    {
+      // Do not read anything beyond the first 16 lines
+      if (linesRead >= 16)
+        break;
+
+      ss << line;
+      ++linesRead;
+
+      // First element is index.
+      int tagIndex;
+      ss >> tagIndex;
+
+      // Next element is name of the tag
+      std::string tagName;
+      ss >> tagName;
+
+      // If no tag name read, use default.
+      if (tagName.empty())
+      {
+        SHLOG_ERROR
+        (
+          "Collision tag file line {} does not match the required format of 'index<space>tag name'. Default tag used for index {}"
+        , linesRead + 1
+        , tagIndex
+        )
+
+        // Use default since 
+        tagNames[tagIndex] = std::to_string(tagIndex + 1);
+        continue;
+      }
+
+      tagNames[tagIndex] = tagName;
+
+      ss.clear();
+    }
+
+    collisionTagNamesFile.close();
   }
 
   void SHCollisionTag::Exit(const std::filesystem::path& tagNameFilePath) noexcept
   {
-    // Write current set of names to file.
-    // This ensures any names changed is reflected on the file for the next run of the application.
+    std::ofstream collisionTagNamesFile { tagNameFilePath };
+
+    if (!collisionTagNamesFile.is_open())
+    {
+      SHLOG_ERROR("Failed to open file for Collision Tag Names! Tag names not saved!")
+      return;
     }
 
+    for (int i = 0; i < NUM_TAGS; ++i)
+      collisionTagNamesFile << i << " " << tagNames[i] << std::endl;
+
+    collisionTagNamesFile.close();
+  }
+
+  void SHCollisionTag::UpdateTagNamesFromFile(const std::filesystem::path& tagNameFilePath) noexcept
+  {
+    std::ifstream collisionTagNamesFile { tagNameFilePath };
+
+    if (!collisionTagNamesFile.is_open())
+    {
+      SHLOG_ERROR("Failed to open file for Collision Tag Names! Default tag names used!")
+      return;
+    }
+
+    std::stringstream ss;
+    std::string line;
+
+    int linesRead = 0;
+    while (std::getline(collisionTagNamesFile, line))
+    {
+      // Do not read anything beyond the first 16 lines
+      if (linesRead >= 16)
+        break;
+
+      ss << line;
+      ++linesRead;
+
+      // First element is index.
+      int tagIndex;
+      ss >> tagIndex;
+
+      // Next element is name of the tag
+      std::string tagName;
+      ss >> tagName;
+
+      // If no tag name read, use default.
+      if (tagName.empty())
+      {
+        SHLOG_ERROR
+        (
+          "Collision tag file line {} does not match the required format of 'index<space>tag name'. Name left unchanged for index {}"
+        , linesRead + 1
+        , tagIndex
+        )
+
+        // Use default since 
+        tagNames[tagIndex] = std::to_string(tagIndex + 1);
+        continue;
+      }
+
+      tagNames[tagIndex] = tagName;
+
+      ss.clear();
+    }
+
+    collisionTagNamesFile.close();
+  }
+
+
   void SHCollisionTag::RemoveTagName(int tagIndex)
   {
     if (tagIndex < 0 || tagIndex > NUM_TAGS)

SHADE_Engine/src/Physics/Collision/SHCollisionTags.h

@@ -97,6 +97,7 @@ namespace SHADE
 
     static void Init                  (const std::filesystem::path& tagNameFilePath) noexcept;
     static void Exit                  (const std::filesystem::path& tagNameFilePath) noexcept;
+    static void UpdateTagNamesFromFile(const std::filesystem::path& tagNameFilePath) noexcept;
 
     static void SetTagName            (const std::string& newTagName, int tagIndex);
     static void RemoveTagName         (int tagIndex);

SHADE_Engine/src/Physics/System/SHPhysicsSystem.cpp

@@ -14,6 +14,7 @@
 #include "SHPhysicsSystem.h"
 
 // Project Headers
+#include "Assets/SHAssetMacros.h"
 #include "ECS_Base/Managers/SHComponentManager.h"
 #include "ECS_Base/Managers/SHEntityManager.h"
 #include "ECS_Base/Managers/SHSystemManager.h"
@@ -90,6 +91,11 @@ namespace SHADE
 
   void SHPhysicsSystem::Init()
   {
+    // Initialise collision tags
+    std::filesystem::path defaultCollisionTagNameFilePath { ASSET_ROOT };
+    defaultCollisionTagNameFilePath.append("CollisionTags.SHConfig");
+    SHCollisionTag::Init(defaultCollisionTagNameFilePath);
+
     // Subscribe to component events
     const std::shared_ptr ADD_COMPONENT_RECEIVER { std::make_shared<SHEventReceiverSpec<SHPhysicsSystem>>(this, &SHPhysicsSystem::addPhysicsComponent) };
     const ReceiverPtr ADD_COMPONENT_RECEIVER_PTR = std::dynamic_pointer_cast<SHEventReceiver>(ADD_COMPONENT_RECEIVER);
@@ -122,6 +128,11 @@ namespace SHADE
   void SHPhysicsSystem::Exit()
   {
     worldState.DestroyWorld(factory);
+
+    // Write collision tag names to file
+    std::filesystem::path defaultCollisionTagNameFilePath { ASSET_ROOT };
+    defaultCollisionTagNameFilePath.append("CollisionTags.SHConfig");
+    SHCollisionTag::Exit(defaultCollisionTagNameFilePath);
   }
 
   void SHPhysicsSystem::ForceUpdate()

SHADE_Engine/src/Physics/System/SHPhysicsSystem.h

@@ -69,6 +69,7 @@ namespace SHADE
 
     void  SetFixedUpdateRate  (double fixedUpdateRate)                              noexcept;
     void  SetWorldSettings    (const SHPhysicsWorldState::WorldSettings& settings)  noexcept;
+    void  SetCollisionTagFile (const std::filesystem::path& tagNamesFilePath)       noexcept;
 
     /*---------------------------------------------------------------------------------*/
     /* Function Members                                                                */