C++: Texture Buffer support, Prefabs, Undo/Redo, Render Improvements

What's new in v2.39

• Basic Texture buffer support: can now create OpenGL texture buffers, render to them, and render their contents as a texture (WORK IN PROGRESS)
• Prefabs: Can create a prefab and add prefabs to the world
• New: Shared/SharedVector for sharing large objects without making copies
• RenderEngine: render processors now have to register for specific render phases that they run in (i.e. render hooks)
• New Kaiju-Dev, PhaseJump-Dev schemes for easier dev vs release testing
• XXXBuilderFunc renamed to BuildXXXFunc (less typing)
• Ability to inspect components attached to world node in imGui
• Command, CommandHistory classes for undo/redo
• Can now delete nodes in ImGui with undo/redo
• ImGUIMainMenuBarBuilder builds main menu bar from new Menu/MenuItem types
• imGui shows command history for undo/redo
• Turn on MSAA for renders
• World::Texture renamed to World::FindTexture
• TestAnimateApp: drag in png animations, watch them animate
• New signalHandlers pattern for handling UI events (no more dynamic_cast/inheritance). In C++ dynamic_cast can be buggy in release builds. Also this pattern is better
• New: FindFontWithSize, FindFont
• basic chromatic aberration shader
• Fixed bug in Vector2/Vector3 operator[] due to optimizing compiler
• Better QuickBuild, more QuickBuild options. Use QuickBuild in more test/example scenes
• Render models are now cached and only rebuilt when they need to be
• Pool now uses unique_ptr to store items so its contents are stable after resize
• PJ::Log improvements
• Render engine improvements
• Event now derives from SomeSignal
• More code reviews and unit tests

Screenshots