Filament材质部分

1. 材质编译

# Sets the following variables: RESGEN_HEADER, RESGEN_SOURCE, RESGEN_FLAGS, RESGEN_SOURCE_FLAGS,
# and RESGEN_OUTPUTS. Please pass in an ARCHIVE_NAME that is unique to your project, otherwise the
# incbin directive will happily consume a blob from the wrong project without warnings or errors.
# Also be sure to include the ASM language in the CMake "project" directive for your project.
function(get_resgen_vars ARCHIVE_DIR ARCHIVE_NAME)
    set(OUTPUTS
        ${ARCHIVE_DIR}/${ARCHIVE_NAME}.bin
        ${ARCHIVE_DIR}/${ARCHIVE_NAME}.S
        ${ARCHIVE_DIR}/${ARCHIVE_NAME}.apple.S
        ${ARCHIVE_DIR}/${ARCHIVE_NAME}.h
    )
    if (IOS)
        set(ASM_ARCH_FLAG "-arch ${DIST_ARCH}")
    endif()
    if (APPLE)
        set(ASM_SUFFIX ".apple")
    endif()
    set(RE