add getStrength() to retrieve strength/scale flow uniform
add getStrength() to retrieve strength/scale flow uniform

headupinclouds/ogles_gpgpu,headupinclouds/ogles_gpgpu,hunter-packages/ogles_gpgpu,headupinclouds/ogles_gpgpu,headupinclouds/ogles_gpgpu,hunter-packages/ogles_gpgpu,hunter-packages/ogles_gpgpu,hunter-packages/ogles_gpgpu