Ocean Sim modifier patch

by Matt Ebb, Hamed Zaghaghi

This adds a new Modifier "Ocean" to simulate large-scale wave motion.
Details can be found in the wiki documentation [1], the project homepage [2] and the patch tracker [3]

The modifier is disabled by default for now. To enable it, the WITH_OCEANSIM (cmake) / WITH_BF_OCEANSIM (scons) flags have to be set. The code depends on fftw3, so this also has to be enabled.

[1]
http://wiki.blender.org/index.php/Doc:2.6/Manual/Modifiers/Simulation/Ocean

[2]
http://www.savetheoceansim.com

[3]
http://projects.blender.org/tracker/?group_id=9&atid=127&func=detail&aid=28338

CMakeLists.txt

@@ -171,6 +171,7 @@ option(WITH_MOD_DECIMATE       	"Enable Decimate Modifier" ON)
 option(WITH_MOD_BOOLEAN        	"Enable Boolean Modifier" ON)
 option(WITH_MOD_CLOTH_ELTOPO   	"Enable Experemental cloth solver" OFF)
 mark_as_advanced(WITH_MOD_CLOTH_ELTOPO)
+option(WITH_OCEANSIM            "Enable Ocean Modifier" OFF)
 
 # Image format support
 option(WITH_IMAGE_OPENEXR       "Enable OpenEXR Support (http://www.openexr.com)" ON)
@@ -285,6 +286,10 @@ if(WITH_CODEC_QUICKTIME AND MINGW)
 						"line if youre a developer who wants to add support.")
 endif()
 
+if(NOT WITH_FFTW3 AND WITH_OCEANSIM)
+	message(FATAL_ERROR "WITH_OCEANSIM requires WITH_FFTW3 to be ON")
+endif()
+
 # may as well build python module without a UI
 if(WITH_PYTHON_MODULE)
 	set(WITH_HEADLESS ON)
@@ -1562,6 +1567,7 @@ if(FIRST_RUN)
 	info_cfg_option(WITH_MOD_BOOLEAN)
 	info_cfg_option(WITH_MOD_DECIMATE)
 	info_cfg_option(WITH_MOD_FLUID)
+	info_cfg_option(WITH_OCEANSIM)
 
 	info_cfg_text("")