graphene:with-rays (vars &body body)

ray1 ... rayn -- newly created graphene:ray-t instances
body -- a body that uses the bindings ray1 ... rayn

The graphene:with-rays macro creates new variable bindings and executes the body that use these bindings. The macro performs the bindings sequentially, like the let* macro.

Each ray can be initialized with values using the syntax for the graphene:with-ray macro. See also the graphene:with-ray documentation.