# The name of our project is "GRAY". CMakeLists files in this project can
# refer to the root source directory of the project as ${GRAY_SOURCE_DIR} and
# to the root binary directory of the project as ${GRAY_BINARY_DIR}.
cmake_minimum_required (VERSION 2.6 FATAL_ERROR)

if(DEFINED CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "Choose build type")
else(DEFINED CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "Choose build type")
endif(DEFINED CMAKE_BUILD_TYPE)

project (GRAY)
option(GRAY_ENABLE_GNURBS "Enable gnurbs integration" OFF)
option(GRAY_ENABLE_OPENGL "Enable OpenGL integration" ON)
option(GRAY_ENABLE_OPENMP "Enable OpenMP integration" ON)
option(GRAY_ENABLE_FLTK "Enable Fltk integration" ON)
option(GRAY_BUILD_SHARED "Build shared library" OFF)
option(GRAY_BUILD_EXEC "Build test executable" ON)
option(GRAY_ENABLE_PLY "Enable ply file format" ON)

if(GRAY_ENABLE_OPENMP)
find_package(OpenMP)
if (OPENMP_FOUND)
ADD_DEFINITIONS(-DGRAY_HAVE_OMP)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif(OPENMP_FOUND)
endif(GRAY_ENABLE_OPENMP)

if(GRAY_ENABLE_OPENGL)
find_package(OpenGL)
if (OPENGL_FOUND)
include_directories(${OpenGL_INCLUDE_DIR})
set(LIBS ${LIBS} ${OpenGL_LIBRARIES})
ADD_DEFINITIONS(-DGRAY_HAVE_OGL)
if(GRAY_ENABLE_FLTK)
set(FLTK_SKIP_FORMS TRUE)
set(FLTK_SKIP_FLUID TRUE)
find_package(FLTK)
if (FLTK_FOUND)
include_directories(${FLTK_INCLUDE_DIR})
set(LIBS ${LIBS} ${FLTK_LIBRARIES})
ADD_DEFINITIONS(-DGRAY_HAVE_FLTK)
endif (FLTK_FOUND)
endif (GRAY_ENABLE_FLTK)
endif (OPENGL_FOUND)
endif (GRAY_ENABLE_OPENGL)

if(GRAY_ENABLE_GNURBS)
  include_directories(gnurbs/api)
  include_directories(util)
  add_subdirectory(gnurbs)
  add_subdirectory(util)
  set(LIBS ${LIBS} gnurbs-dynamic util-dynamic)
  include_directories(gnurbs-interface)
  set(GRAY_SOURCE ${GRAY_SOURCE} gnurbs-interface/gnurbs-interface.cc)
  ADD_DEFINITIONS(-DGRAY_HAVE_GNURBS)
endif(GRAY_ENABLE_GNURBS)

set(GRAY_SOURCE ${GRAY_SOURCE} framebuffer.cc  models.cc  meshmodel.cc ray.cc  scene.cc materials.cc camera.cc QuasiMonteCarlo.cc BoundingBox.cc BVTree.cc)

if (GRAY_ENABLE_OPENGL) 
set(GRAY_SOURCE ${GRAY_SOURCE} glu_gray.cc)
if (GRAY_ENABLE_FLTK) 
set(GRAY_SOURCE ${GRAY_SOURCE} glframebuffer.cc  glwindow.cc)
endif (GRAY_ENABLE_FLTK)
endif (GRAY_ENABLE_OPENGL)

if (GRAY_ENABLE_PLY) 
set(GRAY_SOURCE ${GRAY_SOURCE} ply/plyfile.c)
include_directories(ply)
ADD_DEFINITIONS(-DGRAY_HAVE_PLY)
endif (GRAY_ENABLE_PLY)


if (GRAY_BUILD_SHARED)
add_library(gray SHARED ${GRAY_SOURCE})
target_link_libraries (gray ${LIBS} ) 
endif (GRAY_BUILD_SHARED)

if (GRAY_BUILD_EXEC)
if (GRAY_ENABLE_OPENGL) 
if (GRAY_ENABLE_FLTK)
if (GRAY_BUILD_SHARED)
add_executable (glgray main.cc )
target_link_libraries (glgray ${LIBS} gray) 
else(GRAY_BUILD_SHARED)
add_executable (glgray ${GRAY_SOURCE} main.cc )
target_link_libraries (glgray ${LIBS} ) 
endif (GRAY_BUILD_SHARED)
endif (GRAY_ENABLE_FLTK)
endif (GRAY_ENABLE_OPENGL)
endif (GRAY_BUILD_EXEC)