diff --git a/CMakeLists.txt b/CMakeLists.txt index 6691be4a..ae1cdeb0 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -72,6 +72,7 @@ IF(ENABLE_EXAMPLES AND QT_QTOPENGL_FOUND) ADD_SUBDIRECTORY(examples/Paging) ADD_SUBDIRECTORY(examples/OpenGL) ADD_SUBDIRECTORY(examples/SmoothLOD) + ADD_SUBDIRECTORY(examples/DecodeOnGPU) ADD_SUBDIRECTORY(examples/Python) SET(BUILD_EXAMPLES ON) ELSE() diff --git a/examples/DecodeOnGPU/CMakeLists.txt b/examples/DecodeOnGPU/CMakeLists.txt new file mode 100644 index 00000000..fb298715 --- /dev/null +++ b/examples/DecodeOnGPU/CMakeLists.txt @@ -0,0 +1,74 @@ +# Copyright (c) 2010-2012 David Williams +# +# This software is provided 'as-is', without any express or implied +# warranty. In no event will the authors be held liable for any damages +# arising from the use of this software. +# +# Permission is granted to anyone to use this software for any purpose, +# including commercial applications, and to alter it and redistribute it +# freely, subject to the following restrictions: +# +# 1. The origin of this software must not be misrepresented; you must not +# claim that you wrote the original software. If you use this software +# in a product, an acknowledgment in the product documentation would be +# appreciated but is not required. +# +# 2. Altered source versions must be plainly marked as such, and must not be +# misrepresented as being the original software. +# +# 3. This notice may not be removed or altered from any source +# distribution. + +CMAKE_MINIMUM_REQUIRED(VERSION 2.6) + +PROJECT(DecodeOnGPUExample) + +#Projects source files +SET(SRC_FILES + main.cpp + ../common/OpenGLWidget.cpp +) + +#Projects headers files +SET(INC_FILES + OpenGLWidget.h +) + +add_definitions(-DGLEW_STATIC) + +FIND_PACKAGE(OpenGL REQUIRED) + +#Tell CMake the paths for OpenGL and for PolyVox (which is just relative to our current location) +INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIR} ${PolyVoxCore_BINARY_DIR}/include ${PolyVoxCore_SOURCE_DIR}/include ${GLEW_SOURCE_DIR}) +LINK_DIRECTORIES(${PolyVoxCore_BINARY_DIR}) + +#This will include the shader files inside the compiled binary +QT4_ADD_RESOURCES(COMMON_RESOURCES_RCC ../common/example.qrc) + +# Put the resources in a seperate folder in Visual Studio +SOURCE_GROUP("Resource Files" FILES ../common/example.qrc ${COMMON_RESOURCES_RCC}) + +#Build +ADD_EXECUTABLE(DecodeOnGPUExample ${SRC_FILES} ${COMMON_RESOURCES_RCC}) +IF(MSVC) + SET_TARGET_PROPERTIES(DecodeOnGPUExample PROPERTIES COMPILE_FLAGS "/W4 /wd4127") +ENDIF(MSVC) +TARGET_LINK_LIBRARIES(DecodeOnGPUExample glew ${QT_LIBRARIES} ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY} PolyVoxCore) +SET_PROPERTY(TARGET DecodeOnGPUExample PROPERTY FOLDER "Examples") + +#Install - Only install the example in Windows +IF(WIN32) + INSTALL(TARGETS DecodeOnGPUExample + RUNTIME DESTINATION Examples/OpenGL/bin + LIBRARY DESTINATION Examples/OpenGL/lib + ARCHIVE DESTINATION Examples/OpenGL/lib + COMPONENT example + ) + + #.dlls should be installed in shared builds. + #INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/../../release/PolyVoxCore.dll DESTINATION Examples/OpenGL/bin CONFIGURATIONS Release) + #INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/../../release/PolyVoxUtil.dll DESTINATION Examples/OpenGL/bin CONFIGURATIONS Release) + + #INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/../../debug/PolyVoxCore.dll DESTINATION Examples/OpenGL/bin CONFIGURATIONS Debug) + #INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/../../debug/PolyVoxUtil.dll DESTINATION Examples/OpenGL/bin CONFIGURATIONS Debug) +ENDIF(WIN32) diff --git a/examples/DecodeOnGPU/main.cpp b/examples/DecodeOnGPU/main.cpp new file mode 100644 index 00000000..a13da717 --- /dev/null +++ b/examples/DecodeOnGPU/main.cpp @@ -0,0 +1,95 @@ +/******************************************************************************* +Copyright (c) 2005-2009 David Williams + +This software is provided 'as-is', without any express or implied +warranty. In no event will the authors be held liable for any damages +arising from the use of this software. + +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it +freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + + 3. This notice may not be removed or altered from any source + distribution. +*******************************************************************************/ + +#include "OpenGLWidget.h" + +#include "PolyVoxCore/CubicSurfaceExtractor.h" +#include "PolyVoxCore/MarchingCubesSurfaceExtractor.h" +#include "PolyVoxCore/Mesh.h" +#include "PolyVoxCore/SimpleVolume.h" + +#include + +//Use the PolyVox namespace +using namespace PolyVox; + +void createSphereInVolume(SimpleVolume& volData, float fRadius) +{ + //This vector hold the position of the center of the volume + Vector3DFloat v3dVolCenter(volData.getWidth() / 2, volData.getHeight() / 2, volData.getDepth() / 2); + + //This three-level for loop iterates over every voxel in the volume + for (int z = 0; z < volData.getDepth(); z++) + { + for (int y = 0; y < volData.getHeight(); y++) + { + for (int x = 0; x < volData.getWidth(); x++) + { + //Store our current position as a vector... + Vector3DFloat v3dCurrentPos(x,y,z); + //And compute how far the current position is from the center of the volume + float fDistToCenter = (v3dCurrentPos - v3dVolCenter).length(); + + uint8_t uVoxelValue = 0; + + //If the current voxel is less than 'radius' units from the center then we make it solid. + if(fDistToCenter <= fRadius) + { + //Our new voxel value + uVoxelValue = 255; + } + + //Wrte the voxel value into the volume + volData.setVoxelAt(x, y, z, uVoxelValue); + } + } + } +} + +int main(int argc, char *argv[]) +{ + //Create and show the Qt OpenGL window + QApplication app(argc, argv); + OpenGLWidget openGLWidget(0); + openGLWidget.show(); + + //Create an empty volume and then place a sphere in it + SimpleVolume volData(PolyVox::Region(Vector3DInt32(0,0,0), Vector3DInt32(63, 63, 63))); + createSphereInVolume(volData, 30); + + // Extract the surface for the specified region of the volume. Uncomment the line for the kind of surface extraction you want to see. + auto mesh = extractCubicMesh(&volData, volData.getEnclosingRegion()); + //auto mesh = extractMarchingCubesMesh(&volData, volData.getEnclosingRegion()); + + // The surface extractor outputs the mesh in an efficient compressed format which is not directly suitable for rendering. The easiest approach is to + // decode this on the CPU as shown below, though more advanced applications can upload the compressed mesh to the GPU and decompress in shader code. + auto decodedMesh = decode(mesh); + + //Pass the surface to the OpenGL window + openGLWidget.addMesh(decodedMesh); + //openGLWidget.addMesh(mesh2); + openGLWidget.setViewableRegion(volData.getEnclosingRegion()); + + //Run the message pump. + return app.exec(); +} \ No newline at end of file