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(define-module (nanolight state)
#:use-module (oop goops)
#:export (print-state define-state exec-state!
merge-states merge-rule-htp merge-rule-ltp
merge-htp merge-ltp
int flash pan tilt
fixture attribute value-func))
(use-modules (nanolight fixture))
(use-modules (srfi srfi-1))
(define-class <state-assignment> (<object>)
(fixture
#:init-value #f
#:init-keyword #:fixture
#:getter fixture)
(attribute
#:init-value #f
#:init-keyword #:attribute
#:getter attribute)
(value-func
#:init-value #f
#:init-keyword #:value-func
#:getter value-func))
(define (state-assignment-string a)
(string-append
(fixture-string (fixture a))
" / "
(symbol->string (attribute a))
" ---> "
(number->string ((value-func a)))))
; Return #t if the two state assignments target the same parameter
; (i.e. in the same fixture)
(define-method (same-attr (a <state-assignment>) (b <state-assignment>))
(and
(eq? (fixture a) (fixture b))
(eq? (attribute a) (attribute b))))
; Convenience functions
(define merge-htp
(lambda a
(apply merge-states merge-rule-htp a)))
(define merge-ltp
(lambda a
(apply merge-states merge-rule-ltp a)))
; Highest takes precedence: for intensity (only), create a new function
; which returns the highest value from the two inputs
; Otherwise, revert to LTP
(define (merge-rule-htp a b)
(let (
(funca (value-func a))
(funcb (value-func b)))
(if (eq? (attribute a) 'intensity)
(lambda () (max (funca) (funcb)))
funcb)))
; Latest takes precedence: just take whichever one comes last
(define (merge-rule-ltp a b)
(value-func b))
; Merge states according to rule 'merge-rule'
(define (merge-states merge-rule . list-of-states)
(fold
(lambda (assignment-to-add combined-state)
(let ((assignment-in-state (find
(lambda (a)
(same-attr assignment-to-add a))
combined-state)))
(cons (if assignment-in-state
(make <state-assignment>
#:fixture (fixture assignment-to-add)
#:attribute (attribute assignment-to-add)
#:value-func (merge-rule
assignment-in-state
assignment-to-add))
assignment-to-add)
(delq assignment-in-state combined-state))))
'() (apply append list-of-states)))
(define (find-attribute fix attr)
(find (lambda (a)
(eq? (name a) attr))
(attributes fix)))
; Execute the state, i.e. apply it to the physical lighting rig
(define (exec-state! state)
(for-each
(lambda (a)
(assign-attr!
(fixture a)
(attribute a)
(value-func a)))
state))
(define (sort-by-dmx-addr state)
(stable-sort state (lambda (a b)
(or
(<
(get-fixture-universe (fixture a))
(get-fixture-universe (fixture b)))
(and
(eq?
(get-fixture-universe (fixture a))
(get-fixture-universe (fixture b)))
(<
(get-fixture-start-addr (fixture a))
(get-fixture-start-addr (fixture b))))))))
(define (print-state st)
(for-each
(lambda (a)
(display (state-assignment-string a))
(newline))
(sort-by-dmx-addr st)))
(define-syntax define-state
(syntax-rules ()
[(_) #f]
[(_ n) (define n '())]
[(_ n st ...) (define n
(merge-states merge-rule-htp st ...))]))
; Helper functions
(define (hirestime)
(let ((a (gettimeofday)))
(+
(car a)
(/
(cdr a)
1000000))))
(define pi (* 2 (acos 0)))
(define (square-wave hz)
(if (> (sin (* 2 pi hz (hirestime))) 0) 100 0))
(define (static-value attr value fix)
(list (make <state-assignment>
#:fixture fix
#:attribute attr
#:value-func (lambda () value))))
; Useful source functions
(define (int value fix)
(static-value 'intensity value fix))
(define (pan value fix)
(static-value 'pan value fix))
(define (tilt value fix)
(static-value 'tilt value fix))
(define (flash hz fix)
(list (make <state-assignment>
#:fixture fix
#:attribute 'intensity
#:value-func (lambda ()
(square-wave hz)))))
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