# - try to find glut library and include files
#  GLUT_INCLUDE_DIR, where to find GL/glut.h, etc.
#  GLUT_LIBRARIES, the libraries to link against
#  GLUT_FOUND, If false, do not try to use GLUT.
#  FREEGLUT_FOUND
# Also defined, but not for general use are:
#  GLUT_glut_LIBRARY = the full path to the glut library.
#  GLUT_Xmu_LIBRARY  = the full path to the Xmu library.
#  GLUT_Xi_LIBRARY   = the full path to the Xi Library.

#=============================================================================
# Copyright 2001-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distributed this file outside of CMake, substitute the full
#  License text for the above reference.)

IF (WIN32)
FIND_PATH( GLUT_INCLUDE_DIR NAMES GL/glut.h
	PATHS
		${GLUT_ROOT}
		${GLUT_ROOT}/include )
FIND_LIBRARY( GLUT_glut_LIBRARY NAMES glut glut32 freeglut osgglut
	PATHS
		${OPENGL_LIBRARY_DIR}
		${GLUT_ROOT}/Release
		${GLUT_ROOT}/rel
		${GLUT_ROOT}/lib
	)
FIND_LIBRARY( GLUT_glut_LIBRARY_DEBUG NAMES glutD glut32D freeglutD osgglutD
	PATHS
		${OPENGL_LIBRARY_DIR}
		${GLUT_ROOT}/Debug
		${GLUT_ROOT}/dbg
		${GLUT_ROOT}/lib
	)
ELSE (WIN32)

IF (APPLE)
	# These values for Apple could probably do with improvement.
	FIND_PATH( GLUT_INCLUDE_DIR glut.h
	/System/Library/Frameworks/GLUT.framework/Versions/A/Headers
	${OPENGL_LIBRARY_DIR}
	)
	SET(GLUT_glut_LIBRARY "-framework GLUT" CACHE STRING "GLUT library for OSX")
	SET(GLUT_cocoa_LIBRARY "-framework Cocoa" CACHE STRING "Cocoa framework for OSX")
ELSE (APPLE)

	FIND_PATH( GLUT_INCLUDE_DIR GL/glut.h
	/usr/include/GL
	/usr/openwin/share/include
	/usr/openwin/include
	/opt/graphics/OpenGL/include
	/opt/graphics/OpenGL/contrib/libglut
	)

	FIND_LIBRARY( GLUT_glut_LIBRARY glut
	/usr/openwin/lib
	)

	FIND_LIBRARY( GLUT_Xi_LIBRARY Xi
	/usr/openwin/lib
	)

	FIND_LIBRARY( GLUT_Xmu_LIBRARY Xmu
	/usr/openwin/lib
	)

ENDIF (APPLE)

ENDIF (WIN32)
SET( GLUT_FOUND "NO" )
IF(GLUT_INCLUDE_DIR AND GLUT_glut_LIBRARY)
	# Is -lXi and -lXmu required on all platforms that have it?
	# If not, we need some way to figure out what platform we are on.
	if(GLUT_glut_LIBRARY_DEBUG)
		set(GLUT_LIBRARIES debug ${GLUT_glut_LIBRARY_DEBUG} optimized)
	endif()
	SET( GLUT_LIBRARIES
	${GLUT_LIBRARIES}
	${GLUT_glut_LIBRARY}
	${GLUT_Xmu_LIBRARY}
	${GLUT_Xi_LIBRARY}
	${GLUT_cocoa_LIBRARY}
	)
	SET(GLUT_INCLUDE_DIRS ${GLUT_INCLUDE_DIR} ${GLUT_INCLUDE_DIR}/GL)

	GET_FILENAME_COMPONENT(GLUT_LIBRARY_DIRS "${GLUT_glut_LIBRARY}" PATH)
	SET( GLUT_FOUND "YES" )
	
	SET(GLUT_DEFINITIONS -DGLUT_NO_LIB_PRAGMA -DFREEGLUT_LIB_PRAGMAS=0)
ENDIF(GLUT_INCLUDE_DIR AND GLUT_glut_LIBRARY)

MARK_AS_ADVANCED(
GLUT_LIBRARIES
GLUT_LIBRARY_DIRS
GLUT_INCLUDE_DIR
GLUT_INCLUDE_DIRS
GLUT_glut_LIBRARY
GLUT_Xmu_LIBRARY
GLUT_Xi_LIBRARY
)