diff options
Diffstat (limited to 'animise.lisp')
| -rw-r--r-- | animise.lisp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/animise.lisp b/animise.lisp index 4cb54ac..728ec60 100644 --- a/animise.lisp +++ b/animise.lisp @@ -111,6 +111,7 @@ :duration duration)) (defun in-sequence (t1 &rest tws) + "Run the provided tweens one after the other" (let ((seq (make-instance 'tween-seq :tweens (cons t1 tws)))) (correct-sequencing seq) seq)) @@ -118,12 +119,12 @@ (defun end-time (tween) "Some tweens dont have a duration ,and hence never end. NIL is returned to reflect this." - (let-when (dur (duration tween)) + (when-let (dur (duration tween)) (+ (start-time tween) dur))) (defun tween-finished-p (tween time) "Returns T if TWEEN is done running." - (let-when (end (end-time tween)) + (when-let (end (end-time tween)) (>= time end))) (defun add-to-group (group tween &key (offset 0)) @@ -131,13 +132,16 @@ start time becomes the GROUP'S start time and the OFFSET is ignored. Otherwise, TWEEN's start time is set to the start time of the GROUP modified by OFFSET." - (let-when (start-time (and (members group) (start-time group))) + (when-let (start-time (and (members group) (start-time group))) (setf (start-time tween) (+ offset start-time))) (push (members group) tween)) (defun as-group (tween &rest tweens) + "run the provided tweens in paralell (not actually, but + logically). That is, tweens in this group can be updated at the same + time." (make-instance 'tween-group :members (cons tween tweens))) ;;; Interface implementations for TWEEN class @@ -253,7 +257,7 @@ (on-complete thing))) (defmethod run-tween ((ob tween-seq) time) - (let-when (tween (or + (when-let (tween (or ;; find the first unfinished tween in the sequence (find-if-not (lambda (tween) (when (tween-finished-p tween time) |