Allow setting the sprite velocity to be used when following a path.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@262 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -1,5 +1,5 @@
 //
-// $Id: Sprite.java,v 1.11 2001/08/15 22:06:21 shaper Exp $
+// $Id: Sprite.java,v 1.12 2001/08/15 22:48:41 shaper Exp $
 
 package com.threerings.media.sprite;
 
@@ -63,6 +63,10 @@ public class Sprite
 
         updateDrawPosition();
 
+	// set default velocity
+	_vel = new Point(1, 1);
+
+	// initialize frame animation member data
         _frameIdx = 0;
         _animDelay = ANIM_NONE;
         _numTicks = 0;
@@ -141,6 +145,17 @@ public class Sprite
         invalidate();
     }
 
+    /**
+     * Set the sprite's velocity when walking.
+     *
+     * @param vx the x-axis velocity.
+     * @param vy the y-axis velocity.
+     */
+    public void setVelocity (int vx, int vy)
+    {
+	_vel.setLocation(vx, vy);
+    }
+
     /**
      * Stop the sprite from any movement along a path it may be
      * engaged in.
@@ -210,8 +225,8 @@ public class Sprite
 
         // determine the horizontal/vertical move increments
         float dist = MathUtil.distance(x, y, _dest.loc.x, _dest.loc.y);
-        _incx = (float)(_dest.loc.x - x) / dist;
+        _incx = (float)(_dest.loc.x - x) / (dist / _vel.x);
-        _incy = (float)(_dest.loc.y - y) / dist;
+        _incy = (float)(_dest.loc.y - y) / (dist / _vel.y);
 
         // init position data used to track fractional pixels
         _movex = x;
@@ -349,6 +364,9 @@ public class Sprite
     /** When moving, the full path the sprite is traversing. */
     protected Path _fullpath;
 
+    /** The sprite velocity when walking. */
+    protected Point _vel;
+
     /** The sprite manager. */
     protected SpriteManager _spritemgr;
 }

tests/src/java/com/threerings/miso/viewer/ViewerFrame.java

@@ -1,5 +1,5 @@
 //
-// $Id: ViewerFrame.java,v 1.12 2001/08/15 02:30:28 shaper Exp $
+// $Id: ViewerFrame.java,v 1.13 2001/08/15 22:48:41 shaper Exp $
 
 package com.threerings.miso.viewer;
 
@@ -47,6 +47,7 @@ class ViewerFrame extends JFrame implements WindowListener
             TileUtil.getSpriteFrames(tilemgr, TSID_CHAR);
         AmbulatorySprite sprite =
             new AmbulatorySprite(spritemgr, 300, 300, anims);
+	sprite.setVelocity(3, 3);
         spritemgr.addSprite(sprite);
 
 	// create a top-level panel to manage everything