step1、install ndk-pkg

step2、update ndk-pkg-formula-repository

ndk-pkg update

step3、build and install imath

ndk-pkg install imath

ndk-pkg formula view imath

{{ formula }}

if the formula of imath dosn't meet your needs, you can edit it ⤵︎

ndk-pkg formula edit imath

after editing, you may want to rebuild this package ⤵︎

ndk-pkg install imath