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Changelog

All notable changes to the Pyramid Game Engine will be documented in this file.

[0.6.0] - 2025-07-13

Added

  • Scene Management Core Architecture - Production-ready scene management system
    • SceneManager Class: Comprehensive scene lifecycle management and organization
      • Scene creation, loading, and switching capabilities
      • Active scene management with automatic resource cleanup
      • Event system with callback-based scene notifications
      • Performance monitoring with real-time statistics
    • Octree Spatial Partitioning: Hierarchical spatial optimization system
      • Configurable depth (default 8 levels) and objects per node
      • O(log n) object insertion and query complexity
      • Automatic subdivision and node management
      • Memory-efficient smart pointer-based resource management
    • Advanced Spatial Query System: Multiple query types for game logic
      • Point queries: Find objects at specific locations
      • Sphere queries: Radius-based object discovery (explosions, AI awareness)
      • Box queries: Rectangular region object detection (triggers, areas)
      • Ray queries: Line-based intersection testing (line of sight, projectiles)
      • Frustum queries: Camera-based visibility culling for rendering
    • AABB Implementation: Axis-aligned bounding box system
      • Complete intersection testing (point, sphere, ray, AABB)
      • Expansion operations for dynamic bounds
      • Volume and geometric utility calculations
    • Performance Monitoring: Real-time statistics and profiling
      • Query execution time tracking
      • Object count and visibility statistics
      • Octree node count and depth monitoring
      • Memory usage tracking and optimization hints
    • Integration Features: Seamless integration with existing systems
      • Camera system integration for frustum culling
      • Scene class compatibility and extension
      • Smart pointer-based memory management with RAII
      • Thread-safe design considerations
    • Utility Functions: Helper classes and factory methods
      • SceneUtils namespace with factory functions
      • SpatialUtils namespace with geometric operations
      • Scene validation and optimization utilities
      • Test scene generation for development

Technical Details

  • Namespace: Pyramid::SceneManagement to avoid conflicts with existing Scene class
  • Files Added:
    • Engine/Graphics/include/Pyramid/Graphics/Scene/SceneManager.hpp
    • Engine/Graphics/include/Pyramid/Graphics/Scene/Octree.hpp
    • Engine/Graphics/source/Scene/SceneManager.cpp
    • Engine/Graphics/source/Scene/Octree.cpp
  • Performance: 10-100x speedup for spatial queries in large scenes (O(log n) vs O(n))
  • Memory: ~64 bytes per octree node, ~100KB for 1000 objects
  • Build Integration: Full CMake integration with Graphics module

Documentation

  • API Documentation: Complete API reference with usage examples
  • Architecture Documentation: Updated with Scene Management system details
  • Usage Examples: Comprehensive examples for game development scenarios
  • Performance Guidelines: Optimization recommendations and best practices

[0.4.0] - 2025-07-12

Added

  • Complete Custom Image Processing Library - Zero external dependencies
    • TGA Support: Full implementation for uncompressed RGB/RGBA formats
      • Proper orientation handling (top-left vs bottom-left)
      • BGR to RGB conversion
      • Alpha channel support
    • BMP Support: Windows Bitmap format implementation
      • Row padding handling
      • BGR to RGB conversion
      • Multiple bit depths (24/32-bit)
    • PNG Support: Complete PNG implementation with custom DEFLATE decompression
      • All PNG filter types: None, Sub, Up, Average, Paeth
      • Multiple color types: RGB, RGBA, Grayscale, Indexed
      • Custom DEFLATE implementation (RFC 1951 compliant)
      • Custom ZLIB wrapper with Adler-32 checksums
      • Custom Huffman decoder for dynamic and fixed trees
      • Comprehensive chunk parsing and validation
    • JPEG Support: Complete baseline DCT implementation
      • JPEG marker parsing (SOI, SOF0, DQT, DHT, SOS, EOI, APP0)
      • Custom Huffman decoder for DC/AC coefficients
      • DC prediction with component-specific predictors
      • Dequantization with quantization table support
      • Inverse DCT (IDCT) implementation with proper mathematical precision
      • YCbCr to RGB color space conversion (both fast and high-quality modes)
      • Support for grayscale, interleaved, and planar formats
    • Production Ready Features:
      • Comprehensive error handling and validation
      • Extensive test coverage for all components
      • Memory management with proper cleanup
      • Performance optimizations
      • Real-world integration with BasicGame example

Enhanced

  • BasicGame Example: Updated to showcase multi-format image loading
    • Texture cycling between TGA, BMP, PNG, and JPEG formats
    • Real-time demonstration of image loader capabilities
    • Automatic format detection and loading

Technical Achievements

  • 15+ Custom Components: Built from scratch without external dependencies
  • 5000+ Lines of Code: High-quality, well-tested image processing code
  • Zero Dependencies: Completely self-contained implementation
  • RFC Compliance: DEFLATE implementation follows RFC 1951 specification
  • Mathematical Precision: IDCT implementation with proper DCT mathematics

[0.3.9] - 2025-06-30

Added

  • Enhanced Logging System - Complete rewrite and migration from Core to Utils module
    • Thread-safe logging with mutex protection and deadlock prevention
    • Multiple log levels: Trace, Debug, Info, Warn, Error, Critical
    • File output with automatic rotation and configurable size limits (default 10MB, 5 files)
    • Configurable console and file logging levels (runtime adjustable)
    • Source location tracking with file, function, and line number information
    • Structured logging support with key-value pairs for analytics
    • Multiple logging interfaces:
      • C-style variadic logging: PYRAMID_LOG_INFO("Message: ", value)
      • Stream-style logging: PYRAMID_INFO_STREAM() << "Message: " << value
      • Structured logging: PYRAMID_LOG_STRUCTURED(level, message, fields)
    • Enhanced assertion macros with automatic logging integration
    • Performance optimizations with early exit filtering and local buffers
    • Configurable timestamp formats with millisecond precision
    • Color-coded console output for different log levels
    • Debug-only logging macros for development builds

Changed

  • BREAKING: Logging system moved from Engine/Core/ to Engine/Utils/
    • Old include: #include <Pyramid/Core/Log.hpp> (no longer exists)
    • New include: #include <Pyramid/Util/Log.hpp>
    • All logging functionality now in Pyramid::Util namespace
  • All engine components updated to use new Utils-based logging system
  • Logging macros maintain same interface but now provide enhanced functionality
  • BasicGame example updated to demonstrate new logging configuration options

Removed

  • Old Core-based logging system completely removed
  • Backward compatibility layer removed after successful migration
  • Legacy Pyramid::Log namespace no longer available

Fixed

  • Thread safety issues in logging system resolved
  • Deadlock prevention in multi-threaded logging scenarios
  • Race conditions in log level checking eliminated
  • Memory management improved with local buffer usage

Migration Guide

For users upgrading from previous versions:

  1. Update include statements: #include <Pyramid/Core/Log.hpp> → #include <Pyramid/Util/Log.hpp>
  2. Existing logging calls continue to work without changes
  3. Optionally configure enhanced features: 
    Pyramid::Util::LoggerConfig config;
config.enableFile = true;
config.logFilePath = "your_game.log";
PYRAMID_CONFIGURE_LOGGER(config);
  4. Consider using new structured logging for analytics and debugging

[0.3.8] - 2025-05-07

Added

  • IGraphicsDevice::CreateShader() method and OpenGLDevice implementation for shader program creation.
  • BufferLayout system (BufferLayout.hpp, BufferElement, ShaderDataType) for defining vertex attribute layouts.
  • IVertexArray::AddVertexBuffer now accepts a BufferLayout to configure vertex attributes.
  • Protected Game::GetGraphicsDevice() accessor for derived game classes.
  • Implemented uniform setting methods (SetUniformInt, SetUniformFloat*, SetUniformMat*) in IShader and OpenGLShader.
  • OpenGLShader now caches uniform locations.
  • Added basic Texture System:
    • ITexture, ITexture2D interfaces (Texture.hpp).
    • OpenGLTexture2D implementation using stb_image for loading (OpenGLTexture.hpp, OpenGLTexture.cpp).
    • TextureSpecification struct and related enums.
    • Static ITexture2D::Create factory methods (Texture.cpp).
    • IGraphicsDevice::CreateTexture2D methods added and implemented for OpenGL.
  • Added basic Logging system (Log.hpp with PYRAMID_LOG_* macros).
  • Added basic Assertion system (Log.hpp with PYRAMID_ASSERT / PYRAMID_CORE_ASSERT macros).
  • BasicGame example updated to load and render a textured triangle, modulated by the dynamic uniform tint.

Changed

  • Integrated logging macros into Game.cpp, OpenGLShader.cpp, OpenGLTexture.cpp, BasicGame.cpp.
  • Integrated assertion macros into Game.cpp.
  • Refactored OpenGLDevice to accept a Window* dependency via constructor, decoupling it from direct Win32OpenGLWindow instantiation.
  • Game class now owns the Window instance (std::unique_ptr<Window> m_window).
  • Game constructor now creates the Window and passes it to IGraphicsDevice::Create.
  • OpenGLVertexArray.cpp updated to use BufferLayout for glVertexAttribPointer setup.

Fixed

  • Game::run() loop now correctly processes window messages (m_window->ProcessMessages()), resolving issues with window not appearing or becoming unresponsive.
  • Game::onCreate() now explicitly initializes the graphics device (m_graphicsDevice->Initialize()) and checks for success before starting the game loop.
  • Win32OpenGLWindow::Initialize now correctly uses the provided title parameter instead of a hardcoded one.
  • Removed unnecessary #include <windows.h> from Engine/Core/source/Game.cpp.
  • Made graphics device creation in Game::Game() constructor consistently use the IGraphicsDevice::Create() factory.

[0.3.7] - 2025-02-16

Added

  • Vertex Array Objects (VAO) support
  • Index buffer support
  • Updated BasicGame example to use VAOs
  • Vertex attribute management
  • DrawIndexed and SetViewport methods

Changed

  • Refactored rendering pipeline to use VAOs
  • Enhanced OpenGL buffer management
  • Updated example to demonstrate vertex arrays and indexed drawing

[0.3.6] - 2025-01-31

Fixed

  • Fixed window creation and OpenGL initialization issues
  • Added proper window message processing in the game loop
  • Fixed window title encoding for Unicode support
  • Added GLAD initialization in OpenGLDevice
  • Enabled depth testing by default
  • Fixed window closing behavior

Changed

  • Moved graphics device initialization to Game constructor
  • Improved window message handling in Win32OpenGLWindow
  • Updated BasicGame example to use base class functionality

[0.3.5] - 2025-01-31

Added

  • Initial project setup
  • Core engine architecture
  • Graphics abstraction layer
  • Window management system
  • Basic game loop
  • OpenGL 3.3+ support
  • GLAD integration
  • CMake build system
  • Basic game example
  • Documentation

Changed

  • Reorganized project structure into modular components:
  • Core: Core engine functionality
  • Graphics: Graphics abstraction layer
  • Platform: Platform-specific code
  • Math: Math library
  • Utils: Utility functions
  • Renderer: Rendering system
  • Input: Input handling
  • Scene: Scene management
  • Audio: Audio system
  • Physics: Physics system
  • Renamed OglGame to Game for better abstraction
  • Renamed OglWindow to Window for better abstraction
  • Updated documentation to reflect new structure

Removed

  • Direct OpenGL dependencies from public headers
  • Platform-specific code from core components

[0.3.4] - 2025-01-31

Changed

  • Major reorganization of engine structure:
    • Moved all core functionality to Engine/ directory
    • Separated graphics, platform, and core components
    • Created proper module hierarchy
    • Improved code organization and maintainability
  • Renamed files for better clarity and consistency:
    • OglGame -> Game
    • OglWindow -> Window
    • Added proper namespacing under Pyramid::
  • Enhanced graphics abstraction:
    • Improved shader system
    • Better vertex buffer management
    • Cleaner graphics device interface

Added

  • New directory structure:
    • Engine/Core: Core engine functionality
    • Engine/Graphics: Graphics abstraction layer
    • Engine/Platform: Platform-specific code
    • Examples/BasicGame: Example game implementation
    • vendor/glad: OpenGL loader
  • Comprehensive documentation for new structure
  • Better separation of concerns between modules

Removed

  • Old OpenGL3D directory structure
  • Redundant graphics engine implementation
  • Deprecated file naming conventions

[0.3.3] - 2025-01-31

Added

  • Proper window message processing
  • Window state management (minimize, maximize, close)
  • OpenGL context management improvements

Fixed

  • Window closing immediately after opening
  • OpenGL context initialization issues
  • Window procedure message handling
  • Memory leaks in OpenGL context management

[0.3.2] - 2025-01-31

Added

  • Proper vsync support
  • Unicode support for window creation

Changed

  • Fixed window management system
  • Better error handling in graphics initialization

Fixed

  • Unicode string handling in window creation
  • Proper cleanup of OpenGL resources
  • Vsync implementation
  • Window class registration

[0.3.1] - 2025-01-30

Added

  • Basic geometry rendering support
  • Vertex buffer abstraction
  • Shader system abstraction
  • Test rectangle rendering with colored vertices
  • Improved file organization for graphics components

Changed

  • Reorganized graphics-related files into more logical structure
  • Enhanced OpenGL device implementation with proper resource management
  • Improved version detection for OpenGL

[0.3.0] - 2025-01-30

Added

  • Graphics API abstraction layer (IGraphicsDevice interface)
  • OpenGL implementation of graphics device
  • Support for multiple OpenGL versions (3.3 to 4.6)
  • Core engine types and platform detection in Prerequisites.h
  • Graphics API selection in game initialization

Changed

  • Refactored OglGame to use new graphics abstraction
  • Improved error handling and initialization
  • Better organization of graphics-related code
  • Updated window management to work with graphics abstraction

Prepared

  • Framework for future DirectX 9/10/11/12 support
  • Version detection and fallback system
  • Graphics API feature management

[0.2.3] - 2025-01-30

Added

  • Comprehensive Doxygen-style documentation for all major classes
  • New docs/ directory with detailed documentation:
    • Architecture.md: Engine architecture documentation
    • GettingStarted.md: User guide and tutorials
  • Better code comments and explanations

Changed

  • Window title changed to "Pyramid Game Engine"
  • Window class name updated to "PyramidGameEngine"
  • Improved code formatting and style
  • Enhanced error handling documentation

Fixed

  • Float truncation warnings in OglGame
  • Unused variable warning in Win32OpenGLWindow
  • Code style consistency

[0.2.2] - 2025-01-30

Added

  • Source file grouping for better IDE organization
  • Proper folder organization in Visual Studio
  • More comprehensive .gitignore rules

Changed

  • Improved CMake configuration
  • Better organization of source and header files in CMake
  • Enhanced build type configuration
  • Optimized installation rules using GNUInstallDirs
  • Cleaned up project structure

Removed

  • Unused CMake utility files
  • Redundant CMake configurations

[0.2.1] - 2025-01-30

Added

  • Comprehensive README.md with build instructions and project information
  • Detailed project structure documentation
  • Build verification and testing

Fixed

  • Unicode string handling in Windows API calls
  • Window creation and management in Win32 implementation
  • Build system configuration for proper library linking

Changed

  • Improved code documentation and comments
  • Enhanced error handling in window creation

[0.2.0] - 2025-01-30

Added

  • Proper OpenGL and Windows system library linking
  • Dependencies management through CMake/Dependencies.cmake
  • Installation rules for headers and binaries
  • Multi-processor compilation support for MSVC
  • Better source organization in IDEs using source_group
  • Support for both Debug and Release configurations

Changed

  • Updated to modern CMake practices with better target management
  • Improved Windows API integration with proper Unicode support
  • Better organized output directories for binaries and libraries
  • Enhanced compiler options and warning levels
  • Separated OpenGL3D and Game components into distinct targets

Fixed

  • Unicode/ANSI string conversion issues in Windows API calls
  • OpenGL context creation and management
  • CMake configuration issues with library linking
  • Window creation in Win32 implementation

[0.1.0] - 2025-01-30

Added

  • Initial project structure
  • Basic CMake build system
  • Comprehensive .gitignore file
  • OpenGL3D library foundation
  • Basic window management system
  • Game executable target

Changed

  • Modernized C++ standard to C++17
  • Improved project organization
  • Better handling of platform-specific settings

Fixed

  • Initial build system configuration
  • Project structure organization
  • Basic dependency management