Try to handle negative gravity w/ snow. Still needs to look nicer. Currently causes banding.
include_directories(${GLEW_INCLUDE_DIR})
file(GLOB fpcrtl_src *.c)
add_library(fpcrtl STATIC ${fpcrtl_src})
#if(WEBGL)
# set_target_properties(fpcrtl PROPERTIES PREFIX "em")
# set_target_properties(fpcrtl PROPERTIES SUFFIX ".bc")
#endif(WEBGL)