From f8974f4164e2f4e0762ea4051392b45ce25a2bd1 Mon Sep 17 00:00:00 2001
From: horner <horner@mieweb.com>
Date: Fri, 9 Dec 2022 02:34:48 -0500
Subject: [PATCH] playClip works better when timer fires slowly

---
 src/stackTools/playClip.js | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/stackTools/playClip.js b/src/stackTools/playClip.js
index ac764913a..76b0503de 100755
--- a/src/stackTools/playClip.js
+++ b/src/stackTools/playClip.js
@@ -139,7 +139,7 @@ function playClip(element, framesPerSecond) {
     playClipData = {
       intervalId: undefined,
       framesPerSecond: 30,
-      lastFrameTimeStamp: undefined,
+      lastFrameTimeStamp: new Date().getTime(),
       frameRate: 0,
       frameTimeVector: undefined,
       ignoreFrameTimeVector: false,
@@ -182,15 +182,23 @@ function playClip(element, framesPerSecond) {
       startLoadingHandler,
       endLoadingHandler,
       errorLoadingHandler,
+      newlastFrameTimeStamp = new Date().getTime(),
+      deltatime = newlastFrameTimeStamp - playClipData.lastFrameTimeStamp,
+      frames = Math.round((playClipData.framesPerSecond / 1000) * deltatime),
       newImageIdIndex = stackData.currentImageIdIndex;
 
     const imageCount = stackData.imageIds.length;
 
+    if (frames > 1) {
+      console.log('frames:', frames);
+    }
+
     if (playClipData.reverse) {
-      newImageIdIndex--;
+      newImageIdIndex -= frames;
     } else {
-      newImageIdIndex++;
+      newImageIdIndex += frames;
     }
+    playClipData.lastFrameTimeStamp = newlastFrameTimeStamp;
 
     if (
       !playClipData.loop &&