add more stuff

.gitmodules

@@ -4,3 +4,18 @@
 [submodule "magnum"]
 	path = magnum
 	url = https://github.com/mosra/magnum.git
+[submodule "entt"]
+	path = entt
+	url = https://github.com/skypjack/entt.git
+[submodule "magnum-integration"]
+	path = magnum-integration
+	url = https://github.com/mosra/magnum-integration.git
+[submodule "imgui"]
+	path = imgui
+	url = https://github.com/ocornut/imgui.git
+[submodule "magnum-plugins"]
+	path = magnum-plugins
+	url = https://github.com/mosra/magnum-plugins.git
+[submodule "ImGuiFileDialog"]
+	path = ImGuiFileDialog
+	url = https://github.com/aiekick/ImGuiFileDialog.git

CMakeLists.txt

@@ -8,7 +8,20 @@ add_subdirectory(corrade EXCLUDE_FROM_ALL)
 
 # Add Magnum as a subproject, enable Sdl2Application
 set(CMAKE_PREFIX_PATH ${PROJECT_SOURCE_DIR}/SDL2-2.32.6 ${CMAKE_PREFIX_PATH})
+set(MAGNUM_WITH_ANYIMAGEIMPORTER ON CACHE BOOL "" FORCE)
+set(MAGNUM_WITH_ANYSCENEIMPORTER ON CACHE BOOL "" FORCE)
+set(MAGNUM_WITH_OBJIMPORTER ON CACHE BOOL "" FORCE)
 set(MAGNUM_WITH_SDL2APPLICATION ON CACHE BOOL "" FORCE)
 add_subdirectory(magnum EXCLUDE_FROM_ALL)
 
+set(IMGUI_DIR ${CMAKE_CURRENT_SOURCE_DIR}/imgui)
+set(MAGNUM_WITH_IMGUIINTEGRATION ON CACHE BOOL "" FORCE)
+add_subdirectory(magnum-integration EXCLUDE_FROM_ALL)
+
+set(MAGNUM_WITH_STBIMAGEIMPORTER ON CACHE BOOL "" FORCE)
+set(MAGNUM_WITH_GLTFIMPORTER ON CACHE BOOL "" FORCE)
+add_subdirectory(magnum-plugins EXCLUDE_FROM_ALL)
+
+add_subdirectory(entt)
+
 add_subdirectory(src)

modules/FindMagnumIntegration.cmake

@@ -0,0 +1,456 @@
+#.rst:
+# Find Magnum integration library
+# -------------------------------
+#
+# Finds the Magnum integration library. Basic usage::
+#
+#  find_package(MagnumIntegration REQUIRED)
+#
+# This command tries to find Magnum integration library and then defines the
+# following:
+#
+#  MagnumIntegration_FOUND      - Whether the library was found
+#
+# This command alone is useless without specifying the components:
+#
+#  Bullet                       - Bullet Physics integration library
+#  Dart                         - Dart Physics integration library
+#  Eigen                        - Eigen integration library
+#  Glm                          - GLM integration library
+#  ImGui                        - ImGui integration library
+#  Ovr                          - Oculus SDK integration library
+#  Yoga                         - Yoga Layout integration library
+#
+# Example usage with specifying additional components is:
+#
+#  find_package(MagnumIntegration REQUIRED Bullet)
+#
+# For each component is then defined:
+#
+#  MagnumIntegration_*_FOUND    - Whether the component was found
+#  MagnumIntegration::*         - Component imported target
+#
+# The package is found if either debug or release version of each requested
+# library is found. If both debug and release libraries are found, proper
+# version is chosen based on actual build configuration of the project (i.e.
+# Debug build is linked to debug libraries, Release build to release
+# libraries).
+#
+# Additionally these variables are defined for internal usage:
+#
+#  MAGNUMINTEGRATION_INCLUDE_DIR - Magnum integration include dir (w/o
+#   dependencies)
+#  MAGNUMINTEGRATION_*_LIBRARY_DEBUG - Debug version of given library, if found
+#  MAGNUMINTEGRATION_*_LIBRARY_RELEASE - Release version of given library, if
+#   found
+#
+
+#
+#   This file is part of Magnum.
+#
+#   Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
+#               2020, 2021, 2022, 2023, 2024, 2025, 2026
+#             Vladimír Vondruš <mosra@centrum.cz>
+#   Copyright © 2018 Konstantinos Chatzilygeroudis <costashatz@gmail.com>
+#
+#   Permission is hereby granted, free of charge, to any person obtaining a
+#   copy of this software and associated documentation files (the "Software"),
+#   to deal in the Software without restriction, including without limitation
+#   the rights to use, copy, modify, merge, publish, distribute, sublicense,
+#   and/or sell copies of the Software, and to permit persons to whom the
+#   Software is furnished to do so, subject to the following conditions:
+#
+#   The above copyright notice and this permission notice shall be included
+#   in all copies or substantial portions of the Software.
+#
+#   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+#   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+#   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+#   DEALINGS IN THE SOFTWARE.
+#
+
+# Magnum library dependencies
+set(_MAGNUMINTEGRATION_MAGNUM_DEPENDENCIES )
+set(_MAGNUMINTEGRATION_MAGNUMEXTRAS_DEPENDENCIES )
+foreach(_component ${MagnumIntegration_FIND_COMPONENTS})
+    if(_component STREQUAL Bullet)
+        set(_MAGNUMINTEGRATION_${_component}_MAGNUM_DEPENDENCIES SceneGraph Shaders GL)
+    elseif(_component STREQUAL Dart)
+        set(_MAGNUMINTEGRATION_${_component}_MAGNUM_DEPENDENCIES SceneGraph Primitives MeshTools GL)
+    elseif(_component STREQUAL ImGui)
+        set(_MAGNUMINTEGRATION_${_component}_MAGNUM_DEPENDENCIES GL Shaders)
+    elseif(_component STREQUAL Yoga)
+        set(_MAGNUMINTEGRATION_${_component}_MAGNUM_DEPENDENCIES GL Shaders)
+        set(_MAGNUMINTEGRATION_${_component}_MAGNUMEXTRAS_DEPENDENCIES Ui)
+    endif()
+
+    list(APPEND _MAGNUMINTEGRATION_MAGNUM_DEPENDENCIES ${_MAGNUMINTEGRATION_${_component}_MAGNUM_DEPENDENCIES})
+    list(APPEND _MAGNUMINTEGRATION_MAGNUMEXTRAS_DEPENDENCIES ${_MAGNUMINTEGRATION_${_component}_MAGNUMEXTRAS_DEPENDENCIES})
+endforeach()
+find_package(Magnum REQUIRED ${_MAGNUMINTEGRATION_MAGNUM_DEPENDENCIES})
+if(_MAGNUMINTEGRATION_MAGNUMEXTRAS_DEPENDENCIES)
+    find_package(MagnumExtras REQUIRED ${_MAGNUMINTEGRATION_MAGNUMEXTRAS_DEPENDENCIES})
+endif()
+
+# Global include dir that's unique to Magnum Integration. Often it will be
+# installed alongside Magnum, which is why the hint, but if not, it shouldn't
+# just pick MAGNUM_INCLUDE_DIR because then _MAGNUMINTEGRATION_*_INCLUDE_DIR
+# will fail to be found. In case of CMake subprojects the versionIntegration.h
+# is generated inside the build dir so this won't find it, instead
+# src/CMakeLists.txt forcibly sets MAGNUMINTEGRATION_INCLUDE_DIR as an internal
+# cache value to make that work.
+find_path(MAGNUMINTEGRATION_INCLUDE_DIR Magnum/versionIntegration.h
+    HINTS ${MAGNUM_INCLUDE_DIR})
+mark_as_advanced(MAGNUMINTEGRATION_INCLUDE_DIR)
+
+# CMake module dir for dependencies. It might not be present at all if no
+# feature that needs them is enabled, in which case it'll be left at NOTFOUND.
+# But in that case it should also not be subsequently needed for any
+# find_package(). If this is called from a superproject, the
+# _MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR is already set by
+# modules/CMakeLists.txt.
+find_path(_MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR
+    NAMES
+        FindBullet.cmake FindGLM.cmake FindImGui.cmake FindOVR.cmake
+    PATH_SUFFIXES share/cmake/MagnumIntegration/dependencies)
+mark_as_advanced(_MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR)
+
+# If the module dir is found and is not present in CMAKE_MODULE_PATH already
+# (such as when someone explicitly added it, or if it's the Magnum's modules/
+# dir in case of a superproject), add it as the first before all other. Set a
+# flag to remove it again at the end, so the modules don't clash with Find
+# modules of the same name from other projects.
+if(_MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR AND NOT _MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR IN_LIST CMAKE_MODULE_PATH)
+    set(CMAKE_MODULE_PATH ${_MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR} ${CMAKE_MODULE_PATH})
+    set(_MAGNUMINTEGRATION_REMOVE_DEPENDENCY_MODULE_DIR_FROM_CMAKE_PATH ON)
+else()
+    unset(_MAGNUMINTEGRATION_REMOVE_DEPENDENCY_MODULE_DIR_FROM_CMAKE_PATH)
+endif()
+
+# Component distinction (listing them explicitly to avoid mistakes with finding
+# components from other repositories)
+set(_MAGNUMINTEGRATION_LIBRARY_COMPONENTS Bullet Dart Eigen ImGui Glm Yoga)
+if(CORRADE_TARGET_WINDOWS)
+    list(APPEND _MAGNUMINTEGRATION_LIBRARY_COMPONENTS Ovr)
+endif()
+set(_MAGNUMINTEGRATION_HEADER_ONLY_COMPONENTS Eigen)
+# Nothing is enabled by default right now
+set(_MAGNUMINTEGRATION_IMPLICITLY_ENABLED_COMPONENTS )
+
+# Inter-component dependencies (none yet)
+# set(_MAGNUMINTEGRATION_Component_DEPENDENCIES Dependency)
+
+# Ensure that all inter-component dependencies are specified as well
+set(_MAGNUMINTEGRATION_ADDITIONAL_COMPONENTS )
+foreach(_component ${MagnumIntegration_FIND_COMPONENTS})
+    # Mark the dependencies as required if the component is also required
+    if(MagnumIntegration_FIND_REQUIRED_${_component})
+        foreach(_dependency ${_MAGNUMINTEGRATION_${_component}_DEPENDENCIES})
+            set(MagnumIntegration_FIND_REQUIRED_${_dependency} TRUE)
+        endforeach()
+    endif()
+
+    list(APPEND _MAGNUMINTEGRATION_ADDITIONAL_COMPONENTS ${_MAGNUMINTEGRATION_${_component}_DEPENDENCIES})
+endforeach()
+
+# Join the lists, remove duplicate components
+set(_MAGNUMINTEGRATION_ORIGINAL_FIND_COMPONENTS ${MagnumIntegration_FIND_COMPONENTS})
+if(_MAGNUMINTEGRATION_ADDITIONAL_COMPONENTS)
+    list(INSERT MagnumIntegration_FIND_COMPONENTS 0 ${_MAGNUMINTEGRATION_ADDITIONAL_COMPONENTS})
+endif()
+if(MagnumIntegration_FIND_COMPONENTS)
+    list(REMOVE_DUPLICATES MagnumIntegration_FIND_COMPONENTS)
+endif()
+
+# Special cases of include paths for header-only libraries. Libraries not
+# listed here have a path suffix and include name derived from the library name
+# in the loop below. Non-header-only libraries have a configure.h file.
+set(_MAGNUMINTEGRATION_EIGEN_INCLUDE_PATH_NAMES GeometryIntegration.h)
+
+# Find all components
+foreach(_component ${MagnumIntegration_FIND_COMPONENTS})
+    string(TOUPPER ${_component} _COMPONENT)
+
+    # Create imported target in case the library is found. If the project is
+    # added as subproject to CMake, the target already exists and all the
+    # required setup is already done from the build tree.
+    if(TARGET "MagnumIntegration::${_component}") # Quotes to fix KDE's hiliter
+        set(MagnumIntegration_${_component}_FOUND TRUE)
+    else()
+        # Find library include dir for header-only libraries
+        if(_component IN_LIST _MAGNUMINTEGRATION_HEADER_ONLY_COMPONENTS)
+            # Include path names to find, unless specified above
+            if(NOT _MAGNUMINTEGRATION_${_COMPONENT}_INCLUDE_PATH_NAMES)
+                set(_MAGNUMINTEGRATION_${_COMPONENT}_INCLUDE_PATH_NAMES ${_component}Integration.h)
+            endif()
+
+            find_path(_MAGNUMINTEGRATION_${_COMPONENT}_INCLUDE_DIR
+                NAMES ${_MAGNUMINTEGRATION_${_COMPONENT}_INCLUDE_PATH_NAMES}
+                HINTS ${MAGNUMINTEGRATION_INCLUDE_DIR}/Magnum/${_component}Integration)
+            mark_as_advanced(_MAGNUMINTEGRATION_${_COMPONENT}_CONFIGURE_FILE)
+
+        # Non-header-only libraries have a configure file which we need to
+        # subsequently read, so find that one directly
+        elseif(_component IN_LIST _MAGNUMINTEGRATION_LIBRARY_COMPONENTS)
+            find_file(_MAGNUMINTEGRATION_${_COMPONENT}_CONFIGURE_FILE configure.h
+                HINTS ${MAGNUMINTEGRATION_INCLUDE_DIR}/Magnum/${_component}Integration)
+            mark_as_advanced(_MAGNUMINTEGRATION_${_COMPONENT}_CONFIGURE_FILE)
+        endif()
+
+        # Library components
+        if(_component IN_LIST _MAGNUMINTEGRATION_LIBRARY_COMPONENTS AND NOT _component IN_LIST _MAGNUMINTEGRATION_HEADER_ONLY_COMPONENTS)
+            # Try to find both debug and release version
+            find_library(MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_DEBUG Magnum${_component}Integration-d)
+            find_library(MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_RELEASE Magnum${_component}Integration)
+            mark_as_advanced(MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_DEBUG
+                MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_RELEASE)
+
+            # Determine if the library is static or dynamic by reading the
+            # per-library config file. If the file wasn't found, skip this so
+            # it fails on the FPHSA below and not right here.
+            if(_MAGNUMINTEGRATION_${_COMPONENT}_CONFIGURE_FILE)
+                file(READ ${_MAGNUMINTEGRATION_${_COMPONENT}_CONFIGURE_FILE} _magnumIntegrationConfigure)
+                string(REGEX REPLACE ";" "\\\\;" _magnumIntegrationConfigure "${_magnumIntegrationConfigure}")
+                string(REGEX REPLACE "\n" ";" _magnumIntegrationConfigure "${_magnumIntegrationConfigure}")
+                list(FIND _magnumIntegrationConfigure "#define MAGNUM_${_COMPONENT}INTEGRATION_BUILD_STATIC" _magnumIntegrationBuildStatic)
+                if(NOT _magnumIntegrationBuildStatic EQUAL -1)
+                    # The variable is inconsistently named between C++ and
+                    # CMake, so keep it underscored / private
+                    set(_MAGNUMINTEGRATION_${_COMPONENT}_BUILD_STATIC ON)
+                endif()
+            endif()
+
+            # On Windows, if we have a dynamic build of given library, find the
+            # DLLs as well. Abuse find_program() since the DLLs should be
+            # alongside usual executables. On MinGW they however have a lib
+            # prefix.
+            if(CORRADE_TARGET_WINDOWS AND NOT _MAGNUMINTEGRATION_${_COMPONENT}_BUILD_STATIC)
+                find_program(MAGNUMINTEGRATION_${_COMPONENT}_DLL_DEBUG ${CMAKE_SHARED_LIBRARY_PREFIX}Magnum${_component}Integration-d.dll)
+                find_program(MAGNUMINTEGRATION_${_COMPONENT}_DLL_RELEASE ${CMAKE_SHARED_LIBRARY_PREFIX}Magnum${_component}Integration.dll)
+                mark_as_advanced(MAGNUMINTEGRATION_${_COMPONENT}_DLL_DEBUG
+                    MAGNUMINTEGRATION_${_COMPONENT}_DLL_RELEASE)
+            # If not on Windows or on a static build, unset the DLL variables
+            # to avoid leaks when switching shared and static builds
+            else()
+                unset(MAGNUMINTEGRATION_${_COMPONENT}_DLL_DEBUG CACHE)
+                unset(MAGNUMINTEGRATION_${_COMPONENT}_DLL_RELEASE CACHE)
+            endif()
+
+        # If not a header-only component it's something unknown, skip. FPHSA
+        # will take care of handling this below.
+        elseif(NOT _component IN_LIST _MAGNUMINTEGRATION_HEADER_ONLY_COMPONENTS)
+            continue()
+        endif()
+
+        # Decide if the library was found. If not, skip the rest, which
+        # populates the target properties and finds additional dependencies.
+        # This means that the rest can also rely on that e.g. FindGLM.cmake is
+        # present in _MAGNUMPLUGINS_DEPENDENCY_MODULE_DIR -- given that the
+        # library needing GLM was found, it likely also installed FindGLM for
+        # itself.
+        if(
+            # If the component is a header-only library it should have an
+            # include dir
+            (_component IN_LIST _MAGNUMINTEGRATION_HEADER_ONLY_COMPONENTS AND _MAGNUMINTEGRATION_${_COMPONENT}_INCLUDE_DIR) OR
+            # Or, if it's a real library, it should have a configure file
+            (_component IN_LIST _MAGNUMINTEGRATION_LIBRARY_COMPONENTS AND _MAGNUMINTEGRATION_${_COMPONENT}_CONFIGURE_FILE AND (
+                # Or have a debug library, and a DLL found if expected
+                (MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_DEBUG AND (
+                    NOT DEFINED MAGNUMINTEGRATION_${_COMPONENT}_DLL_DEBUG OR
+                    MAGNUMINTEGRATION_${_COMPONENT}_DLL_DEBUG)) OR
+                # Or have a release library, and a DLL found if expected
+                (MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_RELEASE AND (
+                    NOT DEFINED MAGNUMINTEGRATION_${_COMPONENT}_DLL_RELEASE OR
+                    MAGNUMINTEGRATION_${_COMPONENT}_DLL_RELEASE))))
+        )
+            set(MagnumIntegration_${_component}_FOUND TRUE)
+        else()
+            set(MagnumIntegration_${_component}_FOUND FALSE)
+            continue()
+        endif()
+
+        # Target for header-only library components
+        if(_component IN_LIST _MAGNUMINTEGRATION_HEADER_ONLY_COMPONENTS)
+            add_library(MagnumIntegration::${_component} INTERFACE IMPORTED)
+
+        # Target and location for libraries
+        elseif(_component IN_LIST _MAGNUMINTEGRATION_LIBRARY_COMPONENTS)
+            if(_MAGNUMINTEGRATION_${_COMPONENT}_BUILD_STATIC)
+                add_library(MagnumIntegration::${_component} STATIC IMPORTED)
+            else()
+                add_library(MagnumIntegration::${_component} SHARED IMPORTED)
+            endif()
+
+            foreach(_CONFIG DEBUG RELEASE)
+                if(NOT MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_${_CONFIG})
+                    continue()
+                endif()
+
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    IMPORTED_CONFIGURATIONS ${_CONFIG})
+                # Unfortunately for a DLL the two properties are swapped out,
+                # *.lib goes to IMPLIB, so it's duplicated like this
+                if(DEFINED MAGNUMINTEGRATION_${_COMPONENT}_DLL_${_CONFIG})
+                    # Quotes to "fix" KDE's higlighter
+                    set_target_properties("MagnumIntegration::${_component}" PROPERTIES
+                        IMPORTED_LOCATION_${_CONFIG} ${MAGNUMINTEGRATION_${_COMPONENT}_DLL_${_CONFIG}}
+                        IMPORTED_IMPLIB_${_CONFIG} ${MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_${_CONFIG}})
+                else()
+                    set_property(TARGET MagnumIntegration::${_component} PROPERTY
+                        IMPORTED_LOCATION_${_CONFIG} ${MAGNUMINTEGRATION_${_COMPONENT}_LIBRARY_${_CONFIG}})
+                endif()
+            endforeach()
+        endif()
+
+        # Bullet integration library
+        if(_component STREQUAL Bullet)
+            # On Emscripten, Bullet could be taken from ports. If that's the
+            # case, propagate proper compiler flag.
+            if(CORRADE_TARGET_EMSCRIPTEN)
+                # The library-specific configure file was read above already
+                list(FIND _magnumIntegrationConfigure "#define MAGNUM_USE_EMSCRIPTEN_PORTS_BULLET" _magnum${_component}Integration_USE_EMSCRIPTEN_PORTS_BULLET)
+                if(NOT _magnum${_component}Integration_USE_EMSCRIPTEN_PORTS_BULLET EQUAL -1)
+                    set(MAGNUM_USE_EMSCRIPTEN_PORTS_BULLET 1)
+                endif()
+            endif()
+
+            if(MAGNUM_USE_EMSCRIPTEN_PORTS_BULLET)
+                if(CMAKE_VERSION VERSION_LESS 3.13)
+                    message(FATAL_ERROR "${_component}Integration was compiled against an emscripten-ports version of Bullet but linking to it requires CMake 3.13 at least")
+                endif()
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    INTERFACE_COMPILE_OPTIONS "SHELL:-s USE_BULLET=1")
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    INTERFACE_LINK_OPTIONS "SHELL:-s USE_BULLET=1")
+            else()
+                find_package(Bullet)
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    INTERFACE_LINK_LIBRARIES Bullet::LinearMath)
+            endif()
+
+        # Eigen integration library
+        elseif(_component STREQUAL Eigen)
+            find_package(Eigen3)
+            # We could drop this once we can use at least 3.3.1 (Ubuntu 16.04
+            # has only 3.3 beta, which doesn't have this target yet), however
+            # for Travis and AppVeyor we're using FindEigen3.cmake from the
+            # downloaded sources (because the Eigen3Config.cmake, which
+            # produces the actual targets, is not there -- only
+            # Eigen3Config.cmake.in). See the YML files for an extended rant.
+            # Also, FindEigen3 only defines EIGEN3_INCLUDE_DIR, not even
+            # EIGEN3_INCLUDE_DIRS, so be extra careful.
+            # https://eigen.tuxfamily.org/index.php?title=ChangeLog#Eigen_3.3.1
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_INCLUDE_DIRECTORIES ${EIGEN3_INCLUDE_DIR})
+
+        # ImGui integration library
+        elseif(_component STREQUAL ImGui)
+            find_package(ImGui)
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_LINK_LIBRARIES ImGui::ImGui)
+
+        # GLM integration library
+        elseif(_component STREQUAL Glm)
+            find_package(GLM)
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_LINK_LIBRARIES GLM::GLM)
+
+        # Dart integration library
+        elseif(_component STREQUAL Dart)
+            find_package(DART 6.0.0 CONFIG REQUIRED)
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_LINK_LIBRARIES dart)
+
+        # Oculus SDK integration library
+        elseif(_component STREQUAL Ovr)
+            find_package(OVR)
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_LINK_LIBRARIES OVR::OVR)
+
+        # Yoga integration library
+        elseif(_component STREQUAL Yoga)
+            # Since 2.0.0 the project provides a CMake config file, force it.
+            # Before 2.0 it didn't even have an install target, so assume those
+            # versions just aren't used at all.
+            find_package(yoga CONFIG REQUIRED)
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_LINK_LIBRARIES yoga::yogacore)
+        endif()
+
+        if(_component IN_LIST _MAGNUMINTEGRATION_LIBRARY_COMPONENTS)
+            # Link to core Magnum library, add other Magnum required and
+            # optional dependencies
+            set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                INTERFACE_LINK_LIBRARIES Magnum::Magnum)
+            foreach(_dependency ${_MAGNUMINTEGRATION_${_component}_MAGNUM_DEPENDENCIES})
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    INTERFACE_LINK_LIBRARIES Magnum::${_dependency})
+            endforeach()
+            foreach(_dependency ${_MAGNUMINTEGRATION_${_component}_MAGNUMEXTRAS_DEPENDENCIES})
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    INTERFACE_LINK_LIBRARIES MagnumExtras::${_dependency})
+            endforeach()
+            foreach(_dependency ${_MAGNUMINTEGRATION_${_component}_MAGNUM_OPTIONAL_DEPENDENCIES})
+                if(Magnum_${_dependency}_FOUND)
+                    set_property(TARGET MagnumIntegration::${_component} APPEND     PROPERTY
+                        INTERFACE_LINK_LIBRARIES Magnum::${_dependency})
+                endif()
+            endforeach()
+
+            # Add inter-project dependencies
+            foreach(_dependency ${_MAGNUMINTEGRATION_${_component}_DEPENDENCIES})
+                set_property(TARGET MagnumIntegration::${_component} APPEND PROPERTY
+                    INTERFACE_LINK_LIBRARIES MagnumIntegration::${_dependency})
+            endforeach()
+        endif()
+    endif()
+endforeach()
+
+# For CMake 3.16+ with REASON_FAILURE_MESSAGE, provide additional potentially
+# useful info about the failed components.
+if(NOT CMAKE_VERSION VERSION_LESS 3.16)
+    set(_MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE )
+    # Go only through the originally specified find_package() components, not
+    # the dependencies added by us afterwards
+    foreach(_component ${_MAGNUMINTEGRATION_ORIGINAL_FIND_COMPONENTS})
+        if(MagnumIntegration_${_component}_FOUND)
+            continue()
+        endif()
+
+        # If it's not known at all, tell the user -- it might be a new library
+        # and an old Find module, or something platform-specific.
+        if(NOT _component IN_LIST _MAGNUMINTEGRATION_LIBRARY_COMPONENTS)
+            list(APPEND _MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE "${_component} is not a known component on this platform.")
+        # Otherwise, if it's not among implicitly built components, hint that
+        # the user may need to enable it
+        # TODO: currently, the _FOUND variable doesn't reflect if dependencies
+        #   were found. When it will, this needs to be updated to avoid
+        #   misleading messages.
+        elseif(NOT _component IN_LIST _MAGNUMINTEGRATION_IMPLICITLY_ENABLED_COMPONENTS)
+            string(TOUPPER ${_component} _COMPONENT)
+            list(APPEND _MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE "${_component} is not built by default. Make sure you enabled MAGNUM_WITH_${_COMPONENT}INTEGRATION when building Magnum Integration.")
+        # Otherwise we have no idea. Better be silent than to print something
+        # misleading.
+        else()
+        endif()
+    endforeach()
+
+    string(REPLACE ";" " " _MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE "${_MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE}")
+    set(_MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE REASON_FAILURE_MESSAGE "${_MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE}")
+endif()
+
+# Remove Magnum Integration dependency module dir from CMAKE_MODULE_PATH again.
+# Do it before the FPHSA call which may exit early in case of a failure.
+if(_MAGNUMINTEGRATION_REMOVE_DEPENDENCY_MODULE_DIR_FROM_CMAKE_PATH)
+    list(REMOVE_ITEM CMAKE_MODULE_PATH ${_MAGNUMINTEGRATION_DEPENDENCY_MODULE_DIR})
+    unset(_MAGNUMINTEGRATION_REMOVE_DEPENDENCY_MODULE_DIR_FROM_CMAKE_PATH)
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(MagnumIntegration
+    REQUIRED_VARS MAGNUMINTEGRATION_INCLUDE_DIR
+    HANDLE_COMPONENTS
+    ${_MAGNUMINTEGRATION_REASON_FAILURE_MESSAGE})

resources/resources.conf

@@ -0,0 +1,4 @@
+group=texture-resources
+
+[file]
+filename=stone.tga

src/CMakeLists.txt

@@ -1,12 +1,55 @@
-find_package(Magnum REQUIRED GL Sdl2Application)
+find_package(Corrade REQUIRED Main)
+find_package(Magnum REQUIRED
+        GL
+        MeshTools
+        Shaders
+        SceneGraph
+        Trade
+        Sdl2Application)
+find_package(MagnumIntegration REQUIRED ImGui)
 
 set_directory_properties(PROPERTIES CORRADE_USE_PEDANTIC_FLAGS ON)
 
-add_executable(${PROJECT_NAME} Chocolate.cpp)
+add_executable(${PROJECT_NAME} WIN32
+        Chocolate.h
+        Chocolate.cpp
+        Camera.h
+        Camera.cpp
+        MagnumDrawable.h
+        MagnumDrawable.cpp
+        Common.h
+        ${PROJECT_SOURCE_DIR}/ImGuiFileDialog/ImGuiFileDialog.cpp
+        Components.cpp
+        Components.h
+        Scene.cpp
+        Scene.h
+        Materials.h
+        UI.cpp
+        UI.h
+)
+
+target_include_directories(${PROJECT_NAME} PRIVATE ${PROJECT_SOURCE_DIR}/ImGuiFileDialog)
+
+add_dependencies(${PROJECT_NAME}
+    Magnum::AnyImageImporter
+    Magnum::AnySceneImporter
+    Magnum::ObjImporter
+    MagnumPlugins::StbImageImporter
+    MagnumPlugins::GltfImporter
+)
+
 target_link_libraries(${PROJECT_NAME} PRIVATE
+    Corrade::Main
     Magnum::Application
     Magnum::GL
-    Magnum::Magnum)
+    Magnum::Magnum
+    Magnum::MeshTools
+    Magnum::SceneGraph
+    Magnum::Shaders
+    Magnum::Trade
+    EnTT::EnTT
+    MagnumIntegration::ImGui
+)
 
 # Make the executable a default target to build & run in Visual Studio
 set_property(DIRECTORY ${PROJECT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT ${PROJECT_NAME})

src/Camera.cpp

@@ -0,0 +1,42 @@
+#include "Camera.h"
+
+Camera::Camera(Scene3D& scene, const float aspectRatio, const float near, const float far)
+{
+    _cameraObject
+        .setParent(&scene)
+        .translate(Vector3::zAxis(5.0f));
+    (_camera = new SceneGraph::Camera3D{_cameraObject})
+        ->setAspectRatioPolicy(SceneGraph::AspectRatioPolicy::Extend)
+        .setProjectionMatrix(
+            Matrix4::perspectiveProjection(35.0_degf, aspectRatio, near, far)
+        )
+        .setViewport(GL::defaultFramebuffer.viewport().size());
+}
+
+void Camera::Init(Scene3D& scene, float aspectRatio, float near, float far)
+{
+    _cameraObject
+        .setParent(&scene);
+
+    (_camera = new SceneGraph::Camera3D{_cameraObject})
+        ->setAspectRatioPolicy(SceneGraph::AspectRatioPolicy::Extend)
+        .setProjectionMatrix(
+            Matrix4::perspectiveProjection(35.0_degf, aspectRatio, near, far)
+        )
+        .setViewport(GL::defaultFramebuffer.viewport().size());
+}
+
+void Camera::Draw(SceneGraph::DrawableGroup3D& _drawables) const
+{
+    _camera->draw(_drawables);
+}
+
+void Camera::SetViewport(const Vector2i& size) const
+{
+    _camera->setViewport(size);
+}
+
+void Camera::Translate(const Math::Vector3<Float>& vector)
+{
+    _cameraObject.translate(vector);
+}

src/Camera.h

@@ -0,0 +1,32 @@
+#ifndef CHOCOLATE_CAMERA_H
+#define CHOCOLATE_CAMERA_H
+
+#include <Magnum/SceneGraph/Camera.h>
+#include <Magnum/SceneGraph/Drawable.h>
+#include <Magnum/SceneGraph/MatrixTransformation3D.h>
+#include <Magnum/SceneGraph/Scene.h>
+#include <Magnum/GL/DefaultFramebuffer.h>
+
+#include "Common.h"
+
+using namespace Magnum;
+using namespace Math::Literals;
+
+class Camera
+{
+public:
+    explicit Camera(): _camera(nullptr) {}
+    explicit Camera(Scene3D& scene, float aspectRatio, float near, float far);
+
+    void Init(Scene3D& scene, float aspectRatio, float near, float far);
+    void Draw(SceneGraph::DrawableGroup3D& _drawables) const;
+    void SetViewport(const Vector2i& size) const;
+    void Translate(const Math::Vector3<Float>& vector);
+private:
+    Object3D _cameraObject;
+    SceneGraph::Camera3D* _camera;
+};
+
+
+
+#endif //CHOCOLATE_CAMERA_H

src/Chocolate.cpp

@@ -1,26 +1,395 @@
-#include <Magnum/GL/DefaultFramebuffer.h>
-#include <Magnum/Platform/Sdl2Application.h>
+#include "Chocolate.h"
+#include "MagnumDrawable.h"
+#include "Components.h"
 
-using namespace Magnum;
+#include <Magnum/GL/Renderbuffer.h>
+#include <Magnum/GL/TextureFormat.h>
+#include <Magnum/GL/RenderbufferFormat.h>
+#include <Magnum/GL/Framebuffer.h>
+#include <Magnum/Math/Quaternion.h>
+#include <Magnum/Trade/SceneData.h>
+#include <Magnum/Trade/LightData.h>
+#include <imgui.h>
+#include <Magnum/ImGuiIntegration/Context.hpp>
 
-class Chocolate: public Platform::Application {
-    public:
-        explicit Chocolate(const Arguments& arguments);
+#include "Magnum/ShaderTools/Stage.h"
+#include "Magnum/Trade/ObjectData2D.h"
+#include <Magnum/Trade/ImageData.h>
 
-    private:
-        void drawEvent() override;
-};
+Chocolate::Chocolate(const Arguments& arguments) :
+    Platform::Application{
+        arguments, Configuration{}
+                   .setTitle("Chocolate")
+                   .setSize({1920, 1080})
+                   .setWindowFlags(Configuration::WindowFlag::Resizable)
+    }
+{
+    _imgui = ImGuiIntegration::Context(Vector2{windowSize()}/dpiScaling(),
+        windowSize(), framebufferSize());
 
-Chocolate::Chocolate(const Arguments& arguments): Platform::Application{arguments} {
-    /* TODO: Add your initialization code here */
+    /* Setup renderer and shader defaults */
+    GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
+    GL::Renderer::enable(GL::Renderer::Feature::FaceCulling);
+
+    GL::Renderer::setBlendEquation(GL::Renderer::BlendEquation::Add,
+        GL::Renderer::BlendEquation::Add);
+    GL::Renderer::setBlendFunction(GL::Renderer::BlendFunction::SourceAlpha,
+        GL::Renderer::BlendFunction::OneMinusSourceAlpha);
+
+    _camera.Init(_scene, 1.f, 0.01f, 1000.f);
+    _camera.Translate(Vector3::zAxis(10.f));
+
+    _materials["matte_rubber"] = PhongMaterialConfig{
+       { 0.02, 0.02, 0.02, 1.f},
+        {0.1, 0.1, 0.1, 1.f},
+        {0.05, 0.05, 0.05, 1.f},
+        2.f
+    };
+
+    const auto viewportSize = GL::defaultFramebuffer.viewport().size();
+
+    Vector2i renderWindowSize = {static_cast<int>(viewportSize.x() * (1 - _sidebarWidth)), viewportSize.y()};
+    Vector2i renderWindowPosition = {static_cast<int>(viewportSize.x() * _sidebarWidth), 0};
+    _uiSceneRenderer = UI::RenderWindow(renderWindowSize, renderWindowPosition);
+    _uiComponents.push_back(&_uiSceneRenderer);
+
+    Vector2i entityListPanelSize = {static_cast<int>(viewportSize.x() * _sidebarWidth), viewportSize.y() / 2};
+    Vector2i entityListPanelPosition = {0, 0};
+    _uiEntityListPanel = UI::EntityListPanel(entityListPanelSize, entityListPanelPosition, &_registry,
+    [this](const std::string& file)
+    {
+        Import(file);
+    },
+    [this](entt::entity entitySelected)
+    {
+        EntitySelected(entitySelected);
+    });
+    _uiComponents.push_back(&_uiEntityListPanel);
+
+    Vector2i entityEditorWindowSize = {static_cast<int>(viewportSize.x() * _sidebarWidth), viewportSize.y() / 2};
+    Vector2i entityEditorWindowPosition = {0, viewportSize.y() / 2};
+    _uiEntityEditorWindow = UI::EntityEditorWindow(entityEditorWindowSize, entityEditorWindowPosition, &_registry);
+    _uiComponents.push_back(&_uiEntityEditorWindow);
+}
+
+void Chocolate::tickEvent()
+{
+    UpdateMagnumObjects();
 }
 
 void Chocolate::drawEvent() {
-    GL::defaultFramebuffer.clear(GL::FramebufferClear::Color);
 
-    /* TODO: Add your drawing code here */
+    RenderToFramebuffer(_uiSceneRenderer.Framebuffer());
+
+    DrawUI();
 
     swapBuffers();
+    redraw();
+}
+
+void Chocolate::UpdateMagnumObjects()
+{
+    for (const auto entity : _registry.view<Components::MagnumObject>())
+    {
+        const auto obj = _registry.get<Components::MagnumObject>(entity).obj;
+        if (const auto transform = _registry.try_get<Components::Transform>(entity))
+        {
+            Matrix4 matrix = Matrix4::translation(transform->translation) * Matrix4{transform->rotation.toMatrix()} * Matrix4::scaling(transform->scale);
+            obj->setTransformation(matrix);
+        }
+    }
+}
+
+void Chocolate::viewportEvent(ViewportEvent& event) {
+    GL::defaultFramebuffer.setViewport({{}, event.framebufferSize()});
+
+    _camera.SetViewport(event.windowSize());
+
+    _imgui.relayout(Vector2{event.windowSize()}/event.dpiScaling(),
+        event.windowSize(), event.framebufferSize());
+
+
+    auto windowSize = event.framebufferSize();
+    ResizeUI(windowSize);
+}
+
+void Chocolate::pointerPressEvent(PointerEvent& event) {
+    _imgui.handlePointerPressEvent(event);
+}
+
+void Chocolate::pointerReleaseEvent(PointerEvent& event) {
+    _imgui.handlePointerReleaseEvent(event);
+}
+
+void Chocolate::pointerMoveEvent(PointerMoveEvent& event) {
+    _imgui.handlePointerMoveEvent(event);
+}
+
+void Chocolate::keyPressEvent(KeyEvent& event) {
+    if(_imgui.handleKeyPressEvent(event)) return;
+}
+
+void Chocolate::keyReleaseEvent(KeyEvent& event) {
+    if(_imgui.handleKeyReleaseEvent(event)) return;
+}
+
+void Chocolate::textInputEvent(TextInputEvent& event) {
+    if(_imgui.handleTextInputEvent(event)) return;
+}
+
+void Chocolate::RenderToFramebuffer(GL::Framebuffer& framebuffer)
+{
+    framebuffer
+        .clear(GL::FramebufferClear::Color|GL::FramebufferClear::Depth)
+        .bind();
+
+    _camera.Draw(_drawables);
+}
+
+void Chocolate::DrawUI()
+{
+    GL::defaultFramebuffer
+        .clear(GL::FramebufferClear::Color|GL::FramebufferClear::Depth)
+        .bind();
+
+    _imgui.newFrame();
+    if(ImGui::GetIO().WantTextInput && !isTextInputActive())
+        startTextInput();
+    else if(!ImGui::GetIO().WantTextInput && isTextInputActive())
+        stopTextInput();
+
+    for (const auto comp : _uiComponents)
+    {
+        comp->Draw();
+    }
+
+    /* Update application cursor */
+    _imgui.updateApplicationCursor(*this);
+
+    GL::Renderer::enable(GL::Renderer::Feature::Blending);
+    GL::Renderer::enable(GL::Renderer::Feature::ScissorTest);
+    GL::Renderer::disable(GL::Renderer::Feature::FaceCulling);
+    GL::Renderer::disable(GL::Renderer::Feature::DepthTest);
+    _imgui.drawFrame();
+    GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
+    GL::Renderer::enable(GL::Renderer::Feature::FaceCulling);
+    GL::Renderer::disable(GL::Renderer::Feature::ScissorTest);
+    GL::Renderer::disable(GL::Renderer::Feature::Blending);
+}
+
+void Chocolate::ResizeUI(Vector2i windowSize)
+{
+    Vector2i renderWindowSize = {static_cast<int>(windowSize.x() * (1 - _sidebarWidth)), windowSize.y()};
+    Vector2i renderWindowPosition = {static_cast<int>(windowSize.x() * _sidebarWidth), 0};
+    _uiSceneRenderer.SetPosition(renderWindowPosition);
+    _uiSceneRenderer.Resize(renderWindowSize);
+
+    Vector2i entityListPanelSize = {static_cast<int>(windowSize.x() * _sidebarWidth), windowSize.y()};
+    Vector2i entityListPanelPosition = {0, 0};
+    _uiEntityListPanel.SetPosition(entityListPanelPosition);
+    _uiEntityListPanel.Resize(entityListPanelSize);
+
+    Vector2i entityEditorWindowSize = {static_cast<int>(windowSize.x() * _sidebarWidth), windowSize.y() / 2};
+    Vector2i entityEditorWindowPosition = {0, windowSize.y() / 2};
+    _uiEntityEditorWindow.SetPosition(entityEditorWindowPosition);
+    _uiEntityEditorWindow.Resize(entityEditorWindowSize);
+}
+
+void Chocolate::Import(const std::string& file)
+{
+    PluginManager::Manager<Trade::AbstractImporter> manager;
+    Containers::Pointer<Trade::AbstractImporter> importer =
+        manager.loadAndInstantiate("AnySceneImporter");
+
+    if (!importer || !importer->openFile(file))
+        std::exit(1);
+
+    auto sceneMeshes = Containers::Array<Containers::Optional<GL::Mesh*>>{importer->meshCount()};
+    for(UnsignedInt i = 0; i != importer->meshCount(); ++i) {
+        Containers::Optional<Trade::MeshData> meshData = importer->mesh(i);
+
+        if(!meshData) {
+            Warning{} << "Cannot load mesh" << i << importer->meshName(i);
+            sceneMeshes[i] = nullptr;
+            continue;
+        }
+
+        MeshTools::CompileFlags flags;
+        if(!meshData->hasAttribute(Trade::MeshAttribute::Normal))
+            flags |= MeshTools::CompileFlag::GenerateFlatNormals;
+
+        GL::Mesh mesh = MeshTools::compile(*meshData, flags);
+
+        _meshes.push_back(std::make_unique<GL::Mesh>(std::move(mesh)));
+        sceneMeshes[i] = _meshes.back().get();
+    }
+
+    auto sceneTextures = Containers::Array<Containers::Optional<GL::Texture2D*>>{importer->textureCount()};
+    for(UnsignedInt i = 0; i != importer->textureCount(); ++i) {
+        Containers::Optional<Trade::TextureData> textureData =
+            importer->texture(i);
+        if(!textureData || textureData->type() != Trade::TextureType::Texture2D) {
+            Warning{} << "Cannot load texture" << i
+                << importer->textureName(i);
+            continue;
+        }
+
+        Containers::Optional<Trade::ImageData2D> imageData =
+            importer->image2D(textureData->image());
+        if(!imageData || imageData->isCompressed()) {
+            Warning{} << "Cannot load image" << textureData->image()
+                << importer->image2DName(textureData->image());
+            continue;
+        }
+
+        _textures.push_back(std::make_unique<GL::Texture2D>(std::move(GL::Texture2D{}
+            .setMagnificationFilter(textureData->magnificationFilter())
+            .setMinificationFilter(textureData->minificationFilter(),
+                                   textureData->mipmapFilter())
+            .setWrapping(textureData->wrapping().xy())
+            .setStorage(Math::log2(imageData->size().max()) + 1,
+                GL::textureFormat(imageData->format()), imageData->size())
+            .setSubImage(0, {}, *imageData)
+            .generateMipmap())));
+
+        auto texture = _textures.back().get();
+        sceneTextures[i] = texture;
+    }
+
+    Containers::Array<Containers::Optional<Trade::PhongMaterialData>> materials{importer->materialCount()};
+    for(UnsignedInt i = 0; i != importer->materialCount(); ++i) {
+        Containers::Optional<Trade::MaterialData> materialData = importer->material(i);
+
+        if(!materialData) {
+            Warning{} << "Cannot load material" << i
+                << importer->materialName(i);
+            continue;
+        }
+
+        materials[i] = std::move(*materialData).as<Trade::PhongMaterialData>();
+    }
+
+    if(importer->defaultScene() == -1 && !sceneMeshes.isEmpty() && sceneMeshes[0]) {
+        const auto& entity = _registry.create();
+
+        _registry.emplace<Components::Label>(entity);
+        _registry.emplace<Components::Transform>(entity);
+
+        auto& [mesh] = _registry.emplace<Components::Mesh>(entity);
+        mesh = *sceneMeshes[0];
+
+        auto& [shader, config, texture] = _registry.emplace<Components::Material>(entity);
+        shader = &_phongShader;
+        config = &_materials["matte_rubber"];
+
+        auto& [obj, drawable] = _registry.emplace<Components::MagnumObject>(entity);
+        obj = new Object3D{};
+        obj->setParent(&_scene);
+        drawable = new Rendering::Magnum::Drawable(obj, &_drawables, _registry, entity);
+
+        return;
+    }
+
+    Containers::Optional<Trade::SceneData> scene = importer->scene(importer->defaultScene());
+
+    if(!scene ||
+       !scene->is3D() ||
+       !scene->hasField(Trade::SceneField::Parent) ||
+       !scene->hasField(Trade::SceneField::Mesh))
+    {
+        Fatal{} << "Couldn't load scene" << importer->defaultScene()
+            << importer->sceneName(importer->defaultScene());
+    }
+
+    Containers::Array<Object3D*> objects{scene->mappingBound()};
+    Containers::Array<Containers::Pair<UnsignedInt, Int>> parents = scene->parentsAsArray();
+    Containers::Array<Containers::Pair<UnsignedInt, Matrix4>> transforms = scene->transformations3DAsArray();
+    Containers::Array<Containers::Pair<UnsignedInt, Containers::Pair<UnsignedInt, Int>>> meshMap = scene->meshesMaterialsAsArray();
+
+    for (const auto& parent : parents)
+    {
+        objects[parent.first()] = new Object3D{};
+    }
+
+    for (const auto& parent : parents)
+    {
+        objects[parent.first()]->setParent(parent.second() == -1 ? &_scene : objects[parent.second()]);
+    }
+
+    for (const auto& transform : transforms)
+    {
+        if (auto* obj = objects[transform.first()])
+        {
+            obj->setTransformation(transform.second());
+        }
+    }
+
+    for (UnsignedInt i = 0; i != objects.size(); ++i)
+    {
+        const auto& entity = _registry.create();
+        _registry.emplace<Components::Label>(entity);
+
+        auto& [obj, drawable] = _registry.emplace<Components::MagnumObject>(entity);
+        obj = objects[i];
+        drawable = new Rendering::Magnum::Drawable(obj, &_drawables, _registry, entity);
+        auto& [translation, rotation, scale] = _registry.emplace<Components::Transform>(entity);
+        translation = obj->transformation().translation();
+        scale = obj->transformation().scaling();
+        rotation = Quaternion::fromMatrix(obj->transformation().rotation());
+
+        if (scene->hasFieldObject(Trade::SceneField::MeshMaterial, i))
+        {
+            auto meshMaterial = scene->meshesMaterialsFor(i)[0];
+
+            auto meshId = meshMaterial.first();
+            auto materialId = meshMaterial.second();
+
+            if (meshId != -1 && sceneMeshes[meshId])
+            {
+                auto& [mesh] = _registry.emplace<Components::Mesh>(entity);
+                mesh = *sceneMeshes[meshId];
+            }
+
+            auto& [shader, config, texture] = _registry.emplace<Components::Material>(entity);
+            shader = &_phongShader;
+
+            if (materialId == -1 || !materials[materialId])
+            {
+                config = &_materials["matte_rubber"];
+            }
+            else
+            {
+                auto& material = materials[materialId];
+
+                char buf [64] = {};
+                sprintf(buf, "Material_%d", materialId);
+
+                std::string materialName = buf;
+
+                if (_materials.find(materialName) == _materials.end())
+                {
+                    _materials[materialName] = PhongMaterialConfig{
+                        material->ambientColor(),
+                        material->diffuseColor(),
+                        material->specularColor(),
+                        material->shininess(),
+                    };
+                }
+
+                config = &_materials[materialName];
+
+                if (material->hasAttribute(Trade::MaterialAttribute::DiffuseTexture))
+                {
+                     texture = *sceneTextures[material->diffuseTexture()];
+                }
+            }
+        }
+    }
+}
+
+void Chocolate::EntitySelected(entt::entity entity)
+{
+    _uiEntityEditorWindow.SetEntity(entity);
 }
 
 MAGNUM_APPLICATION_MAIN(Chocolate)

src/Chocolate.h

@@ -0,0 +1,100 @@
+#ifndef CHOCOLATE_CHOCOLATE_H
+#define CHOCOLATE_CHOCOLATE_H
+
+#include <Corrade/Containers/Optional.h>
+#include <Corrade/Containers/Pair.h>
+#include <Corrade/PluginManager/Manager.h>
+#include <Corrade/Utility/Arguments.h>
+
+#include <Magnum/GL/Framebuffer.h>
+#include <Magnum/ImageView.h>
+#include <Magnum/Math/Time.h>
+#include <Magnum/Mesh.h>
+#include <Magnum/GL/DefaultFramebuffer.h>
+#include <Magnum/GL/Mesh.h>
+#include <Magnum/GL/Renderer.h>
+#include <Magnum/Math/Color.h>
+#include <Magnum/MeshTools/Compile.h>
+#include <Magnum/Platform/Sdl2Application.h>
+#include <Magnum/SceneGraph/Camera.h>
+#include <Magnum/SceneGraph/Drawable.h>
+#include <Magnum/SceneGraph/MatrixTransformation3D.h>
+#include <Magnum/SceneGraph/Scene.h>
+#include <Magnum/Shaders/PhongGL.h>
+#include <Magnum/Trade/AbstractImporter.h>
+#include <Magnum/Trade/MeshData.h>
+#include <Magnum/Trade/PhongMaterialData.h>
+#include <Magnum/Trade/TextureData.h>
+
+
+#include <entt/entt.hpp>
+
+#include <imgui.h>
+#include <Magnum/ImGuiIntegration/Context.hpp>
+
+#include "Camera.h"
+
+#include "Materials.h"
+#include "UI.h"
+
+using namespace Magnum;
+using namespace Math::Literals;
+
+class Chocolate: public Platform::Application {
+public:
+    virtual ~Chocolate() = default;
+    explicit Chocolate(const Arguments& arguments);
+
+private:
+    //SDL 2 events
+    void drawEvent() override;
+    void tickEvent() override;
+    void viewportEvent(ViewportEvent& event) override;
+    void pointerPressEvent(PointerEvent& event) override;
+    void pointerReleaseEvent(PointerEvent& event) override;
+    void pointerMoveEvent(PointerMoveEvent& event) override;
+    void keyPressEvent(KeyEvent& event) override;
+    void keyReleaseEvent(KeyEvent& event) override;
+    void textInputEvent(TextInputEvent& event) override;
+
+    // Render
+    void RenderToFramebuffer(GL::Framebuffer& framebuffer);
+
+    // UI
+    void DrawUI();
+    void ResizeUI(Vector2i windowSize);
+
+    //Systems
+    void UpdateMagnumObjects();
+
+    // Callbacks
+    void Import(const std::string& file);
+    void EntitySelected(entt::entity entity);
+
+    //Scene
+    Scene3D _scene;
+    SceneGraph::DrawableGroup3D _drawables;
+    Camera _camera;
+
+    // Resources
+    std::vector<std::unique_ptr<GL::Mesh>> _meshes;
+    std::vector<std::unique_ptr<GL::Texture2D>> _textures;
+    std::unordered_map<std::string, PhongMaterialConfig> _materials;
+
+    Shaders::PhongGL _phongShader;
+
+    entt::registry _registry;
+
+    entt::entity selectedEntityToEdit = entt::null;
+    bool showEntityEditorWindow = false;
+    ImGuiIntegration::Context _imgui{NoCreate};
+    float _sidebarWidth = 0.17f;
+
+    std::vector<UI::Component*> _uiComponents;
+    UI::RenderWindow _uiSceneRenderer;
+    UI::EntityListPanel _uiEntityListPanel;
+    UI::EntityEditorWindow _uiEntityEditorWindow;
+};
+
+
+#endif //CHOCOLATE_CHOCOLATE_H

src/Common.h

@@ -0,0 +1,12 @@
+#ifndef CHOCOLATE_COMMON_H
+#define CHOCOLATE_COMMON_H
+
+#include <Magnum/SceneGraph/MatrixTransformation3D.h>
+#include <Magnum/SceneGraph/Scene.h>
+
+using namespace Magnum;
+
+typedef SceneGraph::Object<SceneGraph::MatrixTransformation3D> Object3D;
+typedef SceneGraph::Scene<SceneGraph::MatrixTransformation3D> Scene3D;
+
+#endif //CHOCOLATE_COMMON_H

src/Components.cpp

@@ -0,0 +1,10 @@
+//
+// Created by lbmas on 1/3/2026.
+//
+
+#include "Components.h"
+
+namespace Components
+{
+
+}

src/Components.h

@@ -0,0 +1,60 @@
+#ifndef CHOCOLATE_COMPONENTS_H
+#define CHOCOLATE_COMPONENTS_H
+
+#include <Magnum/Math/Quaternion.h>
+#include <Magnum/Math/Vector3.h>
+#include <Magnum/GL/Mesh.h>
+#include <Magnum/Math/Color.h>
+#include <Magnum/Shaders/PhongGL.h>
+
+#include "Common.h"
+#include <entt/entt.hpp>
+
+#include "MagnumDrawable.h"
+#include "Materials.h"
+
+using namespace Magnum;
+
+namespace Components
+{
+    struct Transform
+    {
+        Vector3 translation{0.0f, 0.0f, 0.0f};
+        Quaternion rotation {};
+        Vector3 scale{1.0f, 1.0f, 1.0f};
+    };
+
+    struct Mesh
+    {
+        GL::Mesh* mesh;
+    };
+
+    struct Material
+    {
+        Shaders::PhongGL* _shader {nullptr};
+
+        PhongMaterialConfig* phongConfig {nullptr};
+
+        GL::Texture2D* texture {nullptr};
+    };
+
+    struct Parent
+    {
+        entt::entity entity{entt::null};
+    };
+
+    struct Label
+    {
+        std::string content;
+
+        static constexpr std::size_t MAX_SIZE = 128;
+    };
+
+    struct MagnumObject
+    {
+        Object3D* obj {nullptr};
+        Rendering::Magnum::Drawable* drawable {nullptr};
+    };
+}
+
+#endif //CHOCOLATE_COMPONENTS_H

src/MagnumDrawable.cpp

@@ -0,0 +1,40 @@
+#include "MagnumDrawable.h"
+
+#include <Magnum/SceneGraph/Camera.h>
+
+#include "Components.h"
+
+namespace Rendering::Magnum
+{
+    void Drawable::draw(const Matrix4& transformationMatrix, SceneGraph::Camera3D& camera)
+    {
+        const auto mesh = _registry.try_get<Components::Mesh>(_entity);
+        if (!mesh) return;
+
+        if (const auto material = _registry.try_get<Components::Material>(_entity))
+        {
+            material->_shader->
+                 setDiffuseColor(material->phongConfig->diffuse)
+                .setAmbientColor(material->phongConfig->ambient)
+                .setSpecularColor(material->phongConfig->specular)
+                .setShininess(material->phongConfig->shininess)
+                .setLightPositions({
+                    {camera.cameraMatrix().transformPoint({-3.0f, 10.0f, 10.0f}), 0.0f}
+                })
+                .setTransformationMatrix(transformationMatrix)
+                .setNormalMatrix(transformationMatrix.normalMatrix())
+                .setProjectionMatrix(camera.projectionMatrix())
+                .draw(*mesh->mesh);
+
+            if (material->texture)
+            {
+                material->_shader->bindDiffuseTexture(*material->texture);
+            }
+        }
+        else
+        {
+            // TODO: Have a default rendering method
+        }
+    }
+}
+

src/MagnumDrawable.h

@@ -0,0 +1,30 @@
+#ifndef CHOCOLATE_DRAWABLE_H
+#define CHOCOLATE_DRAWABLE_H
+
+#include <Magnum/GL/Mesh.h>
+#include <Magnum/SceneGraph/Drawable.h>
+
+#include "Common.h"
+
+#include <entt/entt.hpp>
+
+namespace Rendering::Magnum
+{
+    class Drawable : public SceneGraph::Drawable3D{
+    public:
+        explicit Drawable(
+            Object3D* object,
+            SceneGraph::DrawableGroup3D* group,
+            entt::registry& registry,
+            entt::entity entity
+        ): SceneGraph::Drawable3D{*object, group}, _registry(registry), _entity(entity) {}
+
+    private:
+        void draw(const Matrix4& transformationMatrix, SceneGraph::Camera3D& camera) override;
+
+        entt::registry& _registry;
+        entt::entity _entity;
+    };
+}
+
+#endif //CHOCOLATE_DRAWABLE_H

src/Materials.h

@@ -0,0 +1,16 @@
+#ifndef CHOCOLATE_MATERIALS_H
+#define CHOCOLATE_MATERIALS_H
+
+#include <Magnum/Math/Color.h>
+
+using namespace Magnum;
+
+struct PhongMaterialConfig
+{
+    Color4 ambient{1.0f, 1.0f, 1.0f};
+    Color4 diffuse{1.0f, 1.0f, 1.0f};
+    Color4 specular{1.0f, 1.0f, 1.0f};
+    float shininess{0.0f};
+};
+
+#endif //CHOCOLATE_MATERIALS_H

src/Scene.cpp

@@ -0,0 +1,5 @@
+//
+// Created by lbmas on 1/4/2026.
+//
+
+#include "Scene.h"

src/Scene.h

@@ -0,0 +1,11 @@
+#ifndef CHOCOLATE_SCENE_H
+#define CHOCOLATE_SCENE_H
+
+
+struct Scene
+{
+
+};
+
+
+#endif //CHOCOLATE_SCENE_H

src/UI.cpp

@@ -0,0 +1,215 @@
+//
+// Created by lbmas on 1/5/2026.
+//
+
+#include "UI.h"
+#include "Components.h"
+
+#include <Magnum/GL/TextureFormat.h>
+#include <Magnum/GL/RenderbufferFormat.h>
+
+#include <imgui.h>
+#include <Magnum/ImGuiIntegration/Context.hpp>
+#include <ImGuiFileDialog.h>
+
+#include "SDL_stdinc.h"
+
+namespace UI
+{
+    // RENDER WINDOW
+    RenderWindow::RenderWindow() : _framebuffer(NoCreate), _size(Vector2i{}), _position(Vector2i{})
+    {
+    }
+
+    RenderWindow::RenderWindow(const Vector2i& size, const Vector2i& position) : _framebuffer({{}, size}), _size(size), _position(position)
+    {
+        _renderTexture.setStorage(1, GL::TextureFormat::RGBA8, size);
+        _depthStencil.setStorage(GL::RenderbufferFormat::Depth24Stencil8, size);
+
+        _framebuffer.attachTexture(GL::Framebuffer::ColorAttachment{0}, _renderTexture, 0);
+        _framebuffer.attachRenderbuffer(GL::Framebuffer::BufferAttachment::DepthStencil, _depthStencil);
+    }
+
+    GL::Framebuffer& RenderWindow::Framebuffer()
+    {
+        return _framebuffer;
+    }
+
+    void RenderWindow::Resize(const Vector2i& size)
+    {
+        _renderTexture.setStorage(1, GL::TextureFormat::RGBA8, size);
+        _depthStencil.setStorage(GL::RenderbufferFormat::Depth24Stencil8, size);
+    }
+
+    void RenderWindow::SetPosition(const Vector2i& position)
+    {
+        _position = position;
+    }
+
+    void RenderWindow::Draw()
+    {
+        ImGui::Begin("Scene Preview", nullptr, ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoDecoration);
+
+        ImGui::SetWindowSize({static_cast<float>(_size.x()), static_cast<float>(_size.y())});
+        ImGui::SetWindowPos({static_cast<float>(_position.x()), static_cast<float>(_position.y())});
+
+        ImGui::Text("%.3f ms/frame (%.1f FPS)",
+                1000.0/Double(ImGui::GetIO().Framerate), Double(ImGui::GetIO().Framerate));
+
+        const ImTextureID textureId = _renderTexture.id();
+        const ImVec2 previewSize = ImGui::GetContentRegionAvail();
+        ImGui::Image(textureId, previewSize, ImVec2(0, 1), ImVec2(1, 0));
+
+        ImGui::End();
+    }
+    // END RENDER WINDOW
+
+
+    // ENTITY LIST PANEL
+    EntityListPanel::EntityListPanel()
+        : _size({0, 0}), _position({0, 0}), _reg(nullptr), _importFunc(nullptr), _entitySelectedFunc(nullptr), _selectedEntity(entt::null)
+    {}
+
+    EntityListPanel::EntityListPanel(Vector2i size, Vector2i position, entt::registry* reg, std::function<void(Containers::StringView)> importFunc, std::function<void(entt::entity)> entitySelectedFunc)
+        : _size(size), _position(position), _selectedEntity(entt::null), _reg(reg), _importFunc(std::move(importFunc)), _entitySelectedFunc(std::move(entitySelectedFunc))
+    {
+    }
+
+    void EntityListPanel::Resize(const Vector2i& size)
+    {
+        _size = size;
+    }
+
+    void EntityListPanel::SetPosition(const Vector2i& position)
+    {
+        _position = position;
+    }
+
+    void EntityListPanel::Draw()
+    {
+        ImGui::Begin("Entities", nullptr, ImGuiWindowFlags_MenuBar | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoCollapse);
+        ImGui::SetWindowSize({(float)_size.x(), (float)_size.y()});
+        ImGui::SetWindowPos({(float)_position.x(), (float)_position.y()});
+
+        if (ImGui::BeginMenuBar())
+        {
+            if (ImGui::BeginMenu("File"))
+            {
+                if (ImGui::MenuItem("Open"))
+                {
+                    IGFD::FileDialogConfig config;
+                    config.path = ".";
+                    ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Open Object File", ".obj,.glb", config);
+                }
+                ImGui::EndMenu();
+            }
+            ImGui::EndMenuBar();
+        }
+
+        if (ImGuiFileDialog::Instance()->Display("ChooseFileDlgKey", ImGuiWindowFlags_NoCollapse, ImVec2(800, 600))) {
+            if (ImGuiFileDialog::Instance()->IsOk()) {
+                std::string absolutePath = ImGuiFileDialog::Instance()->GetFilePathName();
+                Debug{} << "Opening file: " << Containers::String(absolutePath);
+                _importFunc(absolutePath);
+            }
+
+            ImGuiFileDialog::Instance()->Close();
+        }
+
+        if (ImGui::BeginTable("EntityTable", 2, ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg)) {
+            // Define columns
+            ImGui::TableSetupColumn("ID", ImGuiTableColumnFlags_WidthFixed, 40.0f);
+            ImGui::TableSetupColumn("Label");
+            ImGui::TableHeadersRow();
+
+            for (const auto& entity : _reg->view<entt::entity>()) {
+                ImGui::TableNextRow();
+                ImGui::TableNextColumn();
+
+                // Create a selectable that spans the entire row
+                char id[32];
+                sprintf(id, "%u", entity);
+
+                bool isSelected = _selectedEntity == entity;
+                if (ImGui::Selectable(id, isSelected, ImGuiSelectableFlags_SpanAllColumns)) {
+                    _selectedEntity = entity;
+                    _entitySelectedFunc(_selectedEntity);
+                }
+
+                ImGui::TableNextColumn();
+                const auto* label = _reg->try_get<Components::Label>(entity);
+                ImGui::Text("%s", label ? label->content.data() : "");
+            }
+            ImGui::EndTable();
+        }
+
+        ImGui::End(); // ENTITIES
+    }
+    // END ENTITY LIST PANEL
+
+
+    // ENTITY EDITOR WINDOW
+    EntityEditorWindow::EntityEditorWindow()
+        : _size({0, 0}), _position({0, 0}), _reg(nullptr), _selectedEntity(entt::null)
+    {}
+
+    EntityEditorWindow::EntityEditorWindow(Vector2i size, Vector2i position, entt::registry* reg)
+        : _size(size), _position(position), _reg(reg), _selectedEntity(entt::null)
+    {}
+
+    void EntityEditorWindow::SetEntity(entt::entity entity)
+    {
+        _selectedEntity = entity;
+    }
+
+    void EntityEditorWindow::Resize(const Vector2i& size)
+    {
+        _size = size;
+    }
+
+    void EntityEditorWindow::SetPosition(const Vector2i& position)
+    {
+        _position = position;
+    }
+
+    void EntityEditorWindow::Draw()
+    {
+        ImGui::Begin("Entity Editor", nullptr, ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoCollapse);
+        ImGui::SetWindowSize({(float)_size.x(), (float)_size.y()});
+        ImGui::SetWindowPos({(float)_position.x(), (float)_position.y()});
+
+        if (_selectedEntity != entt::null)
+        {
+            if (auto* label = _reg->try_get<Components::Label>(_selectedEntity))
+            {
+                static char entityLabelBuffer[Components::Label::MAX_SIZE] = {};
+                memcpy(entityLabelBuffer, label->content.data(), label->content.size());
+                if (ImGui::InputText("Label", entityLabelBuffer, Components::Label::MAX_SIZE))
+                {
+                    label->content = std::string(entityLabelBuffer);
+                }
+            }
+
+            if (auto* transform = _reg->try_get<Components::Transform>(_selectedEntity))
+            {
+                ImGui::SliderFloat3("Translation", transform->translation.data(), -10, 10);
+                ImGui::SliderFloat3("Scale", transform->scale.data(), -10, 10);
+
+                // Vector3 eulerDegrees = Vector3{transform->rotation.toEuler()} * (180.0f / M_PI);
+                // if (ImGui::SliderFloat3("Rotation", eulerDegrees.data(), -180.0f, 180.0f)) {
+                //     // 3. If changed, convert Degrees -> Radians -> Quaternion
+                //     Vector3 eulerRadians = eulerDegrees * (M_PI / 180.0f);
+                //
+                //     // We recreate the quaternion from the updated Euler angles
+                //     transform->rotation = Quaternion::rotation(Rad(eulerRadians.x()), Vector3::xAxis())
+                //                        * Quaternion::rotation(Rad(eulerRadians.y()), Vector3::yAxis())
+                //                        * Quaternion::rotation(Rad(eulerRadians.z()), Vector3::zAxis());
+                //}
+            }
+        }
+
+        ImGui::End();
+    }
+
+    // END ENTITY EDITOR WINDOW
+}

src/UI.h

@@ -0,0 +1,89 @@
+//
+// Created by lbmas on 1/5/2026.
+//
+
+#ifndef CHOCOLATE_UI_H
+#define CHOCOLATE_UI_H
+
+#include <Magnum/GL/Texture.h>
+#include <Magnum/GL/Renderbuffer.h>
+#include <Magnum/GL/Framebuffer.h>
+
+#include <entt/entt.hpp>
+
+#include <functional>
+
+using namespace Magnum;
+
+namespace UI
+{
+    class Component
+    {
+    public:
+        virtual ~Component() = default;
+
+        virtual void Draw() = 0;
+        virtual void Resize(const Vector2i& size) = 0;
+        virtual void SetPosition(const Vector2i& position) = 0;
+    };
+
+    class RenderWindow : public Component
+    {
+    public:
+        RenderWindow();
+        RenderWindow(const Vector2i& size, const Vector2i& position);
+
+        [[nodiscard]] GL::Framebuffer& Framebuffer();
+
+        void Draw() final;
+        void Resize(const Vector2i& size) final;
+        void SetPosition(const Vector2i& position) final;
+    private:
+        GL::Texture2D _renderTexture;
+        GL::Renderbuffer _depthStencil;
+        GL::Framebuffer _framebuffer;
+
+        Vector2i _size;
+        Vector2i _position;
+    };
+
+    class EntityListPanel : public Component
+    {
+    public:
+        EntityListPanel();
+        explicit EntityListPanel(Vector2i size, Vector2i position, entt::registry* reg, std::function<void(Containers::StringView)> importFunc, std::function<void(entt::entity)> entitySelectedFunc);
+
+        void Draw() final;
+        void Resize(const Vector2i& size) final;
+        void SetPosition(const Vector2i& position) final;
+    private:
+        Vector2i _size;
+        Vector2i _position;
+
+        entt::registry* _reg;
+        std::function<void(Containers::StringView)> _importFunc;
+        std::function<void(entt::entity)> _entitySelectedFunc;
+        entt::entity _selectedEntity;
+    };
+
+    class EntityEditorWindow : public Component
+    {
+    public:
+        EntityEditorWindow();
+        explicit EntityEditorWindow(Vector2i size, Vector2i position, entt::registry* reg);
+
+        void SetEntity(entt::entity entity);
+
+        void Draw() final;
+        void Resize(const Vector2i& size) final;
+        void SetPosition(const Vector2i& position) final;
+    private:
+        Vector2i _size;
+        Vector2i _position;
+        entt::registry* _reg;
+        entt::entity _selectedEntity;
+    };
+}
+
+
+#endif //CHOCOLATE_UI_H