Qt Quick 3D - Volumetric Rendering Example

 # Copyright (C) 2023 The Qt Company Ltd.
 # SPDX-License-Identifier: BSD-3-Clause

 cmake_minimum_required(VERSION 3.16)
 project(volumeraycaster LANGUAGES CXX)
 find_package(OpenMP)

 set(CMAKE_AUTOMOC ON)

 if(NOT DEFINED INSTALL_EXAMPLESDIR)
     set(INSTALL_EXAMPLESDIR "examples")
 endif()

 set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/quick3d/volumeraycaster")

 find_package(Qt6 REQUIRED COMPONENTS Core Gui Quick Quick3D)

 qt_add_executable(volumeraycaster
     main.cpp
     volumetexturedata.cpp
     volumetexturedata.h
     lineboxgeometry.cpp
     lineboxgeometry.h
 )

 set_target_properties(volumeraycaster PROPERTIES
     WIN32_EXECUTABLE TRUE
     MACOSX_BUNDLE TRUE
 )

 target_link_libraries(volumeraycaster PUBLIC
     Qt::Core
     Qt::Gui
     Qt::Quick
     Qt::Quick3D
 )

 if(OpenMP_CXX_FOUND)
     target_link_libraries(volumeraycaster PUBLIC
         OpenMP::OpenMP_CXX
     )
 endif()

 qt_add_qml_module(volumeraycaster
     URI VolumetricExample
     VERSION 1.0
     QML_FILES
         Main.qml
         ArcballController.qml
         OriginGizmo.qml
         Spinner.qml
     RESOURCES
         images/circle.png
         images/colormap-coolwarm.png
         images/colormap-gist_rainbow.png
         images/colormap-gnuplot.png
         images/colormap-plasma.png
         images/colormap-rainbow.png
         images/colormap-viridis.png
         alpha_blending.frag
         alpha_blending.vert
         SpacingMap.mjs
     RESOURCE_PREFIX "/qt/qml"
     IMPORTS
         QtQuick3D
 )

 install(TARGETS volumeraycaster
     RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
     BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
     LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
 )