diff --git a/src/zoom.js b/src/zoom.js
index d56438823b2882856f156b0915ccbac038d6923e..50936066a3597c46ad65f690e9c8417e9d3375f8 100644
--- a/src/zoom.js
+++ b/src/zoom.js
@@ -14,6 +14,10 @@ function defaultFilter(event) {
   return (!event.ctrlKey || event.type === 'wheel') && !event.button;
 }
 
+function defaultCenter(event) {
+  return pointer(event, this);
+}
+
 function defaultExtent() {
   var e = this;
   if (e instanceof SVGElement) {
@@ -27,6 +31,10 @@ function defaultExtent() {
   return [[0, 0], [e.clientWidth, e.clientHeight]];
 }
 
+function defaultCentroid(extent) {
+  return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+}
+
 function defaultTransform() {
   return this.__zoom || identity;
 }
@@ -52,7 +60,9 @@ function defaultConstrain(transform, extent, translateExtent) {
 
 export default function() {
   var filter = defaultFilter,
+      center = defaultCenter,
       extent = defaultExtent,
+      centroid = defaultCentroid,
       constrain = defaultConstrain,
       wheelDelta = defaultWheelDelta,
       touchable = defaultTouchable,
@@ -148,9 +158,6 @@ export default function() {
     return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
   }
 
-  function centroid(extent) {
-    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-  }
 
   function schedule(transition, transform, point, event) {
     transition
@@ -243,6 +250,7 @@ export default function() {
     if (g.wheel) {
       if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
         g.mouse[1] = t.invert(g.mouse[0] = p);
+        g.mouse[2] = center.apply(this, arguments);
       }
       clearTimeout(g.wheel);
     }
@@ -252,14 +260,14 @@ export default function() {
 
     // Otherwise, capture the mouse point and location at the start.
     else {
-      g.mouse = [p, t.invert(p)];
+      g.mouse = [p, t.invert(p), center.apply(this, arguments)];
       interrupt(this);
       g.start();
     }
 
     noevent(event);
     g.wheel = setTimeout(wheelidled, wheelDelay);
-    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[2], t.invert(g.mouse[2])), g.extent, translateExtent));
 
     function wheelidled() {
       g.wheel = null;
@@ -278,7 +286,7 @@ export default function() {
 
     dragDisable(event.view);
     nopropagation(event);
-    g.mouse = [p, this.__zoom.invert(p)];
+    g.prev = p;
     interrupt(this);
     g.start();
 
@@ -288,8 +296,10 @@ export default function() {
         var dx = event.clientX - x0, dy = event.clientY - y0;
         g.moved = dx * dx + dy * dy > clickDistance2;
       }
+      var p = pointer(event, currentTarget);
       g.event(event)
-       .zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+       .zoom("mouse", constrain(translate(g.that.__zoom, p, g.that.__zoom.invert(g.prev)), g.extent, translateExtent));
+      g.prev = p;
     }
 
     function mouseupped(event) {
@@ -303,7 +313,7 @@ export default function() {
   function dblclicked(event, ...args) {
     if (!filter.apply(this, arguments)) return;
     var t0 = this.__zoom,
-        p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+        p0 = center.call(this, event.changedTouches ? event.changedTouches[0] : event),
         p1 = t0.invert(p0),
         k1 = t0.k * (event.shiftKey ? 0.5 : 2),
         t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
@@ -322,7 +332,7 @@ export default function() {
 
     nopropagation(event);
     for (i = 0; i < n; ++i) {
-      t = touches[i], p = pointer(t, this);
+      t = touches[i], p = center.call(this, t);
       p = [p, this.__zoom.invert(p), t.identifier];
       if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;
       else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
@@ -345,7 +355,7 @@ export default function() {
 
     noevent(event);
     for (i = 0; i < n; ++i) {
-      t = touches[i], p = pointer(t, this);
+      t = touches[i], p = center.call(this, t);
       if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
       else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
     }
@@ -406,6 +416,14 @@ export default function() {
     return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
   };
 
+  zoom.center = function(_) {
+    return arguments.length ? (center = typeof _ === "function" ? _ : constant([+_[0], +_[1]]), zoom) : center;
+  };
+
+  zoom.centroid = function(_) {
+    return arguments.length ? (centroid = typeof _ === "function" ? _ : constant([+_[0], +_[1]]), zoom) : centroid;
+  };
+
   zoom.extent = function(_) {
     return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
   };