-(define (new-entity new-components entities components)
- (let ((key (gensym))
- (nc (normalize-components new-components)))
- (values
- (acons key nc entities)
- (register-components key
- (map (lambda (c) (car c)) nc)
- components)
- key)))
-
-(define (remove-entity key entities components)
- (let ((clist (map (lambda (c) (car c)) (assoc-ref entities key))))
- (values
- (assoc-remove! entities key)
- (unregister-components key clist components))))
-
-(define (set-entity key new-components entities components)
- (let* ((nc (normalize-components new-components))
- (clist (map (lambda (c) (car c)) (assoc-ref entities key)))
- (nclist (map (lambda (c) (car c)) nc)))
- (values
- (assoc-set! entities key nc)
- (register-components key (lset-difference eq? nclist clist)
- (unregister-components key (lset-difference eq? clist nclist) components)))))
-
-(define (set-entity-components key new-components entities components)
- (define (set-components clist new-components)
- (cond ((null? new-components)
- clist)
- (else
- (set-components
- (if (cdar new-components)
- (assoc-set! clist (caar new-components) (cdar new-components))
- (assoc-remove! clist (caar new-components)))
- (cdr new-components)))))
- (set-entity key (set-components (alist-copy (assoc-ref entities key)) (normalize-components new-components)) entities components))
-
-(define (set-entities new-entities entities components)
- (cond ((null? new-entities)
+(define (new-entity . new-components)
+ (lambda (entities components)
+ (let ((key (gensym))
+ (nc (normalize-components new-components)))
+ (values
+ (acons key nc entities)
+ (register-components key
+ (map (lambda (c) (car c)) nc)
+ components)
+ (cons key nc)))))
+
+(define (remove-entity key)
+ (lambda (entities components)
+ (let ((clist (map (lambda (c) (car c)) (assoc-ref entities key)))
+ (entity (assoc key entities)))
+ (values
+ (assoc-remove! entities key)
+ (unregister-components key clist components)
+ entity))))
+
+(define (set-entity key . new-components)
+ (lambda (entities components)
+ (let* ((nc (normalize-components new-components))
+ (clist (map (lambda (c) (car c)) (assoc-ref entities key)))
+ (nclist (map (lambda (c) (car c)) nc)))
+ (values
+ (assoc-set! entities key nc)
+ (register-components key (lset-difference eq? nclist clist)
+ (unregister-components key (lset-difference eq? clist nclist) components))
+ (cons key nc)))))
+
+(define (set-entity-components key . new-components)
+ (lambda (entities components)
+ (let ((nc (normalize-components new-components))
+ (clist (alist-copy (assoc-ref entities key))))
+ (for-each
+ (lambda (c)
+ (assoc-set! clist (car c) (cdr c)))
+ nc)
+ (values
+ (assoc-set! entities key clist)
+ (register-components key (map (lambda (c) (car c)) nc) components)
+ (cons key clist)))))
+
+(define (remove-entity-components key . old-components)
+ (lambda (entities components)
+ (let ((clist (alist-copy (assoc-ref entities key))))
+ (for-each
+ (lambda (c)
+ (assoc-remove! clist c))
+ old-components)
+ (values
+ (assoc-set! entities key clist)
+ (unregister-components key old-components components)
+ (cons key clist)))))
+
+(define (modify-entities changes entities components)
+ (cond ((null? changes)