added TIME_SEQUENTIAL animation mode which shows frame 0 first, and

for the full duration.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1687 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/sprite/ImageSprite.java

@@ -1,5 +1,5 @@
 //
-// $Id: ImageSprite.java,v 1.10 2002/07/08 21:15:35 mdb Exp $
+// $Id: ImageSprite.java,v 1.11 2002/09/17 02:34:05 ray Exp $
 
 package com.threerings.media.sprite;
 
@@ -38,6 +38,11 @@ public class ImageSprite extends Sprite
     /** Animation mode indicating time based animation. */
     public static final int TIME_BASED = 2;
 
+    /** Animation mode indicating sequential progressive animation.
+     * Frame 0 is guaranteed to be shown first for the full duration, and
+     * so on. */
+    public static final int TIME_SEQUENTIAL = 3;
+
     /**
      * Constructs an image sprite without any associated frames and with
      * an invalid default initial location. The sprite should be populated
@@ -221,7 +226,7 @@ public class ImageSprite extends Sprite
         if (_frames == null) {
             return;
         }
-
+        
         int fcount = _frames.getFrameCount();
         boolean moved = false;
 
@@ -241,6 +246,13 @@ public class ImageSprite extends Sprite
             nfidx = (int)((timestamp/_frameDelay) % fcount);
             break;
 
+        case TIME_SEQUENTIAL:
+            if (_firstStamp == 0L) {
+                _firstStamp = timestamp;
+            }
+            nfidx = (int) (((timestamp - _firstStamp) / _frameDelay) % fcount);
+            break;
+
         case MOVEMENT_CUED:
             // update the frame if the sprite moved
             if (moved) {
@@ -273,6 +285,9 @@ public class ImageSprite extends Sprite
     /** For how many milliseconds to display an animation frame. */
     protected long _frameDelay;
 
+    /** The first timestamp seen (in TIME_SEQUENTIAL mode). */
+    protected long _firstStamp = 0L;
+
 //     /** DEBUG: The alpha level used when rendering our bounds. */
 //     protected static final Composite ALPHA_BOUNDS =
 //         AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.2f);