From 823a938a4bf668acdcc3216b63a4a7795d3200dc Mon Sep 17 00:00:00 2001
From: Brandon Tilley <brandon@brandontilley.com>
Date: Sun, 22 Dec 2013 13:59:41 -0800
Subject: [PATCH] Add the 'drag' and 'zoom' plugins

---
 CHANGELOG.md                              |  2 +
 dist/planetaryjs-noplugins.js             |  2 +-
 dist/planetaryjs.js                       | 67 ++++++++++++++++++++++-
 dist/planetaryjs.min.js                   |  2 +-
 site/public/css/planetaryjs.less          |  1 +
 site/public/documentation/builtin_drag.md | 23 +++++++-
 site/public/documentation/builtin_zoom.md | 26 ++++++++-
 site/public/js/homepage.js                | 22 +++++++-
 site/public/js/lib/planetaryjs.min.js     |  2 +-
 src/plugins.js                            | 65 ++++++++++++++++++++++
 10 files changed, 205 insertions(+), 7 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7ec47c..e3f89ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+* Implement the `drag` and `zoom` plugins
+
 v0.2.0
 ------
 
diff --git a/dist/planetaryjs-noplugins.js b/dist/planetaryjs-noplugins.js
index 2fdab20..2999c58 100644
--- a/dist/planetaryjs-noplugins.js
+++ b/dist/planetaryjs-noplugins.js
@@ -2,7 +2,7 @@
  *  Copyright (c) 2013 Brandon Tilley
  *
  *  Released under the MIT license
- *  Date: 2013-12-22T07:35:17.700Z
+ *  Date: 2013-12-22T21:59:27.746Z
  */
 (function (root, factory) {
   if (typeof define === 'function' && define.amd) {
diff --git a/dist/planetaryjs.js b/dist/planetaryjs.js
index 3ec2867..9968dc8 100644
--- a/dist/planetaryjs.js
+++ b/dist/planetaryjs.js
@@ -2,7 +2,7 @@
  *  Copyright (c) 2013 Brandon Tilley
  *
  *  Released under the MIT license
- *  Date: 2013-12-22T07:35:17.783Z
+ *  Date: 2013-12-22T21:59:27.872Z
  */
 (function (root, factory) {
   if (typeof define === 'function' && define.amd) {
@@ -306,5 +306,70 @@
     };
   };
 
+  planetaryjs.plugins.zoom = function (options) {
+    var options = options || {};
+    var noop = function() {};
+    var onZoomStart = options.onZoomStart || noop;
+    var onZoomEnd   = options.onZoomEnd   || noop;
+    var onZoom      = options.onZoom      || noop;
+    var startScale  = options.initialScale;
+    var scaleExtent = options.scaleExtent || [50, 2000];
+
+    return function(planet) {
+      planet.onInit(function() {
+        var zoom = d3.behavior.zoom()
+          .scaleExtent(scaleExtent);
+        if (startScale) {
+          zoom.scale(startScale);
+        } else {
+          zoom.scale(planet.projection.scale());
+        }
+        zoom
+          .on('zoomstart', onZoomStart)
+          .on('zoomend', onZoomEnd)
+          .on('zoom', function() {
+            onZoom();
+            planet.projection.scale(d3.event.scale);
+          });
+        d3.select(planet.canvas).call(zoom);
+      });
+    };
+  };
+
+  planetaryjs.plugins.drag = function(options) {
+    var options = options || {};
+    var noop = function() {};
+    var onDragStart = options.onDragStart || noop;
+    var onDragEnd   = options.onDragEnd   || noop;
+    var onDrag      = options.onDrag      || noop;
+
+    return function(planet) {
+      planet.onInit(function() {
+        var drag = d3.behavior.drag()
+          .on('dragstart', onDragStart)
+          .on('dragend', onDragEnd)
+          .on('drag', function() {
+            onDrag();
+            var dx = d3.event.dx;
+            var dy = d3.event.dy;
+            var rotation = planet.projection.rotate();
+            var radius = planet.projection.scale();
+            var scale = d3.scale.linear()
+              .domain([-1 * radius, radius])
+              .range([-90, 90]);
+            var degX = scale(dx);
+            var degY = scale(dy);
+            rotation[0] += degX;
+            rotation[1] -= degY;
+            if (rotation[1] > 90)   rotation[1] = 90;
+            if (rotation[1] < -90)  rotation[1] = -90;
+            if (rotation[0] >= 180) rotation[0] -= 360;
+            planet.projection.rotate(rotation);
+          });
+        d3.select(planet.canvas).call(drag);
+      });
+    };
+  };
+
   return planetaryjs;
 }));
diff --git a/dist/planetaryjs.min.js b/dist/planetaryjs.min.js
index bbbbd47..2248ce1 100644
--- a/dist/planetaryjs.min.js
+++ b/dist/planetaryjs.min.js
@@ -1,2 +1,2 @@
 /*! Planetary.js 0.2.0 | (c) 2013 Brandon Tilley | Released under MIT License */
-!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var i=null;o&&(i=o.planetaryjs);var e=[],r=function(t,o,i){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<i.onDraw.length;n++)i.onDraw[n]()})},l=function(n,t){for(var o=0;o<e.length;o++)t.unshift(e[o]);0==t.length&&(s.plugins.earth&&n.loadPlugin(s.plugins.earth()),s.plugins.pings&&n.loadPlugin(s.plugins.pings()));for(var o=0;o<t.length;o++)t[o](n)},u=function(n,t,o){if(o.onInit.length){var i=0,e=function(n){var t=o.onInit[i];t.length?t(function(){i++,n()}):(t(),i++,setTimeout(n,0))},l=function(){i>=o.onInit.length?r(n,t,o):e(l)};e(l)}else r(n,t,o)},a=function(n,t,o,i){l(n,o),n.canvas=t,n.context=t.getContext("2d"),u(n,t,i)},s={plugins:{},noConflict:function(){return o.planetaryjs=i,s},loadPlugin:function(n){e.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},i={plugins:{},draw:function(n){a(i,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return i.projection=n.geo.orthographic().clipAngle(90).precision(0),i.path=n.geo.path().projection(i.projection),i}};return s.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(i){if(t.world)o.plugins.topojson.world=t.world,setTimeout(i,0);else{var e=t.file||"world-110m.json";n.json(e,function(n,t){if(n)throw new Error("Could not load JSON "+e);o.plugins.topojson.world=t,i()})}})}},s.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},s.plugins.land=function(n){return function(o){var i=null;o.onInit(function(){var n=o.plugins.topojson.world;i=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),0!=n.fill&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},s.plugins.borders=function(n){return function(o){var i=null,e={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,u=n.type||"internal";i=t.mesh(r,l,e[u])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},s.plugins.earth=function(n){var n=n||{},t=n.topojson||{},o=n.oceans||{},i=n.land||{},e=n.borders||{};return function(n){s.plugins.topojson(t)(n),s.plugins.oceans(o)(n),s.plugins.land(i)(n),s.plugins.borders(e)(n)}},s.plugins.pings=function(t){var o=[],i=function(n,i,e){var e=e||{};e.color=e.color||t.color||"white",e.ttl=e.ttl||t.ttl||2e3,e.angle=e.angle||t.angle||5,o.push({lat:n,lng:i,time:new Date,options:e})},e=function(n,t,i){for(var e=[],l=0;l<o.length;l++){var u=o[l],a=i-u.time;a<u.options.ttl&&(e.push(u),r(n,t,i,a,u))}o=e},r=function(t,o,i,e,r){var l=1-e/r.options.ttl,u=n.rgb(r.options.color);u="rgba("+u.r+","+u.g+","+u.b+","+l+")",o.strokeStyle=u;var a=n.geo.circle().origin([r.lng,r.lat]).angle(e/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(a),o.stroke()};return function(n){n.plugins.pings={add:i},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){e(n,o,t)})})}},s});
\ No newline at end of file
+!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var i=null;o&&(i=o.planetaryjs);var e=[],r=function(t,o,i){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<i.onDraw.length;n++)i.onDraw[n]()})},l=function(n,t){for(var o=0;o<e.length;o++)t.unshift(e[o]);0==t.length&&(c.plugins.earth&&n.loadPlugin(c.plugins.earth()),c.plugins.pings&&n.loadPlugin(c.plugins.pings()));for(var o=0;o<t.length;o++)t[o](n)},a=function(n,t,o){if(o.onInit.length){var i=0,e=function(n){var t=o.onInit[i];t.length?t(function(){i++,n()}):(t(),i++,setTimeout(n,0))},l=function(){i>=o.onInit.length?r(n,t,o):e(l)};e(l)}else r(n,t,o)},u=function(n,t,o,i){l(n,o),n.canvas=t,n.context=t.getContext("2d"),a(n,t,i)},c={plugins:{},noConflict:function(){return o.planetaryjs=i,c},loadPlugin:function(n){e.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},i={plugins:{},draw:function(n){u(i,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return i.projection=n.geo.orthographic().clipAngle(90).precision(0),i.path=n.geo.path().projection(i.projection),i}};return c.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(i){if(t.world)o.plugins.topojson.world=t.world,setTimeout(i,0);else{var e=t.file||"world-110m.json";n.json(e,function(n,t){if(n)throw new Error("Could not load JSON "+e);o.plugins.topojson.world=t,i()})}})}},c.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},c.plugins.land=function(n){return function(o){var i=null;o.onInit(function(){var n=o.plugins.topojson.world;i=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),0!=n.fill&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},c.plugins.borders=function(n){return function(o){var i=null,e={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,a=n.type||"internal";i=t.mesh(r,l,e[a])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},c.plugins.earth=function(n){var n=n||{},t=n.topojson||{},o=n.oceans||{},i=n.land||{},e=n.borders||{};return function(n){c.plugins.topojson(t)(n),c.plugins.oceans(o)(n),c.plugins.land(i)(n),c.plugins.borders(e)(n)}},c.plugins.pings=function(t){var o=[],i=function(n,i,e){var e=e||{};e.color=e.color||t.color||"white",e.ttl=e.ttl||t.ttl||2e3,e.angle=e.angle||t.angle||5,o.push({lat:n,lng:i,time:new Date,options:e})},e=function(n,t,i){for(var e=[],l=0;l<o.length;l++){var a=o[l],u=i-a.time;u<a.options.ttl&&(e.push(a),r(n,t,i,u,a))}o=e},r=function(t,o,i,e,r){var l=1-e/r.options.ttl,a=n.rgb(r.options.color);a="rgba("+a.r+","+a.g+","+a.b+","+l+")",o.strokeStyle=a;var u=n.geo.circle().origin([r.lng,r.lat]).angle(e/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(u),o.stroke()};return function(n){n.plugins.pings={add:i},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){e(n,o,t)})})}},c.plugins.zoom=function(t){var t=t||{},o=function(){},i=t.onZoomStart||o,e=t.onZoomEnd||o,r=t.onZoom||o,l=t.initialScale,a=t.scaleExtent||[50,2e3];return function(t){t.onInit(function(){var o=n.behavior.zoom().scaleExtent(a);l?o.scale(l):o.scale(t.projection.scale()),o.on("zoomstart",i).on("zoomend",e).on("zoom",function(){r(),t.projection.scale(n.event.scale)}),n.select(t.canvas).call(o)})}},c.plugins.drag=function(t){var t=t||{},o=function(){},i=t.onDragStart||o,e=t.onDragEnd||o,r=t.onDrag||o;return function(t){t.onInit(function(){var o=n.behavior.drag().on("dragstart",i).on("dragend",e).on("drag",function(){r();var o=n.event.dx,i=n.event.dy,e=t.projection.rotate(),l=t.projection.scale(),a=n.scale.linear().domain([-1*l,l]).range([-90,90]),u=a(o),c=a(i);e[0]+=u,e[1]-=c,e[1]>90&&(e[1]=90),e[1]<-90&&(e[1]=-90),e[0]>=180&&(e[0]-=360),t.projection.rotate(e)});n.select(t.canvas).call(o)})}},c});
\ No newline at end of file
diff --git a/site/public/css/planetaryjs.less b/site/public/css/planetaryjs.less
index 54ea031..c51dd34 100644
--- a/site/public/css/planetaryjs.less
+++ b/site/public/css/planetaryjs.less
@@ -67,6 +67,7 @@ a.ui.icon.header {
 canvas#homepage-globe-canvas {
   width: 350px;
   height: 350px;
+  cursor: move;
 }
 
 @media screen and (max-width: 768px) {
diff --git a/site/public/documentation/builtin_drag.md b/site/public/documentation/builtin_drag.md
index b6139cb..94aea80 100644
--- a/site/public/documentation/builtin_drag.md
+++ b/site/public/documentation/builtin_drag.md
@@ -1,4 +1,25 @@
 Drag Plugin
 ===========
 
-This plugin is not yet impelemented.
+The `drag` plugin allows for modifying the planet's projection's rotation with the mouse wheel. It supports dragging vertically with hard stops at the north and south poles, and dragging horizontally without restriction.
+
+API
+---
+
+**`planetaryjs.plugins.drag([config])`**
+
+Valid keys for `config` are:
+
+* `onDrag`, `onDragStart`, `onDragEnd`: hooks to the `d3.behavior.drag` object's `drag`, `dragstart`, and `dragend` events; each defaults to a no-op
+
+<div class='ui raise segment'>
+<div class='ui red ribbon label'>JavaScript</div>
+
+```javascript
+planetaryjs.plugins.drag({
+  onDrag: function() {
+    console.log("The planet was dragged!", d3.event);
+  }
+});
+```
+</div>
diff --git a/site/public/documentation/builtin_zoom.md b/site/public/documentation/builtin_zoom.md
index 6bdc953..930d714 100644
--- a/site/public/documentation/builtin_zoom.md
+++ b/site/public/documentation/builtin_zoom.md
@@ -1,4 +1,28 @@
 Zoom Plugin
 ===========
 
-This plugin is not yet impelemented.
+The `zoom` plugin allows for modifying the planet's projection's scale with the mouse wheel.
+
+API
+---
+
+**`planetaryjs.plugins.zoom([config])`**
+
+Valid keys for `config` are:
+
+* `initialScale`: the value to initialize the [`d3.behavior.zoom`](https://github.com/mbostock/d3/wiki/Zoom-Behavior) object's scale to; defaults to the scale of the planet's projection at the time the planet is initialized
+* `scaleExtent`: the value to use for the `d3.behavior.zoom` object's `scaleExtent` property, which defines how far in and out the planet can be zoomed; defaults to `[50, 2000]`
+* `onZoom`, `onZoomStart`, `onZoomEnd`: hooks to the `d3.behavior.zoom` object's `zoom`, `zoomstart`, and `zoomend` events; each defaults to a no-op
+
+<div class='ui raise segment'>
+<div class='ui red ribbon label'>JavaScript</div>
+
+```javascript
+planetaryjs.plugins.zoom({
+  scaleExtent: [200, 1000],
+  onZoom: function() {
+    console.log("The planet was zoomed!", d3.event);
+  }
+});
+```
+</div>
diff --git a/site/public/js/homepage.js b/site/public/js/homepage.js
index b313bf1..b0a490f 100644
--- a/site/public/js/homepage.js
+++ b/site/public/js/homepage.js
@@ -12,6 +12,21 @@
   globe.loadPlugin(planetaryjs.plugins.pings());
   // Load our custom `autorotate` plugin; see below.
   globe.loadPlugin(autorotate(10));
+  // The `zoom` and `drag` plugins enable
+  // manipulating the globe with the mouse.
+  globe.loadPlugin(planetaryjs.plugins.zoom({
+    scaleExtent: [100, 300]
+  }));
+  globe.loadPlugin(planetaryjs.plugins.drag({
+    // Dragging the globe shoud pause the
+    // automatic rotation until we release the mouse.
+    onDragStart: function() {
+      globe.plugins.autorotate.pause();
+    },
+    onDragEnd: function() {
+      globe.plugins.autorotate.resume();
+    }
+  }))
   // Set up the globe's initial scale, offset, and rotation.
   globe.projection.scale(175).translate([175, 175]).rotate([0, -10, 0]);
 
@@ -43,9 +58,14 @@
     // as an argument...
     return function(planet) {
       var lastTick = null;
+      var paused = false;
+      planet.plugins.autorotate = {
+        pause:  function() { paused = true;  },
+        resume: function() { paused = false; }
+      };
       // ...and configure hooks into certain pieces of its lifecycle.
       planet.onDraw(function() {
-        if (!lastTick) {
+        if (paused || !lastTick) {
           lastTick = new Date();
         } else {
           var now = new Date();
diff --git a/site/public/js/lib/planetaryjs.min.js b/site/public/js/lib/planetaryjs.min.js
index bbbbd47..2248ce1 100644
--- a/site/public/js/lib/planetaryjs.min.js
+++ b/site/public/js/lib/planetaryjs.min.js
@@ -1,2 +1,2 @@
 /*! Planetary.js 0.2.0 | (c) 2013 Brandon Tilley | Released under MIT License */
-!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var i=null;o&&(i=o.planetaryjs);var e=[],r=function(t,o,i){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<i.onDraw.length;n++)i.onDraw[n]()})},l=function(n,t){for(var o=0;o<e.length;o++)t.unshift(e[o]);0==t.length&&(s.plugins.earth&&n.loadPlugin(s.plugins.earth()),s.plugins.pings&&n.loadPlugin(s.plugins.pings()));for(var o=0;o<t.length;o++)t[o](n)},u=function(n,t,o){if(o.onInit.length){var i=0,e=function(n){var t=o.onInit[i];t.length?t(function(){i++,n()}):(t(),i++,setTimeout(n,0))},l=function(){i>=o.onInit.length?r(n,t,o):e(l)};e(l)}else r(n,t,o)},a=function(n,t,o,i){l(n,o),n.canvas=t,n.context=t.getContext("2d"),u(n,t,i)},s={plugins:{},noConflict:function(){return o.planetaryjs=i,s},loadPlugin:function(n){e.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},i={plugins:{},draw:function(n){a(i,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return i.projection=n.geo.orthographic().clipAngle(90).precision(0),i.path=n.geo.path().projection(i.projection),i}};return s.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(i){if(t.world)o.plugins.topojson.world=t.world,setTimeout(i,0);else{var e=t.file||"world-110m.json";n.json(e,function(n,t){if(n)throw new Error("Could not load JSON "+e);o.plugins.topojson.world=t,i()})}})}},s.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},s.plugins.land=function(n){return function(o){var i=null;o.onInit(function(){var n=o.plugins.topojson.world;i=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),0!=n.fill&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},s.plugins.borders=function(n){return function(o){var i=null,e={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,u=n.type||"internal";i=t.mesh(r,l,e[u])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},s.plugins.earth=function(n){var n=n||{},t=n.topojson||{},o=n.oceans||{},i=n.land||{},e=n.borders||{};return function(n){s.plugins.topojson(t)(n),s.plugins.oceans(o)(n),s.plugins.land(i)(n),s.plugins.borders(e)(n)}},s.plugins.pings=function(t){var o=[],i=function(n,i,e){var e=e||{};e.color=e.color||t.color||"white",e.ttl=e.ttl||t.ttl||2e3,e.angle=e.angle||t.angle||5,o.push({lat:n,lng:i,time:new Date,options:e})},e=function(n,t,i){for(var e=[],l=0;l<o.length;l++){var u=o[l],a=i-u.time;a<u.options.ttl&&(e.push(u),r(n,t,i,a,u))}o=e},r=function(t,o,i,e,r){var l=1-e/r.options.ttl,u=n.rgb(r.options.color);u="rgba("+u.r+","+u.g+","+u.b+","+l+")",o.strokeStyle=u;var a=n.geo.circle().origin([r.lng,r.lat]).angle(e/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(a),o.stroke()};return function(n){n.plugins.pings={add:i},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){e(n,o,t)})})}},s});
\ No newline at end of file
+!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var i=null;o&&(i=o.planetaryjs);var e=[],r=function(t,o,i){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<i.onDraw.length;n++)i.onDraw[n]()})},l=function(n,t){for(var o=0;o<e.length;o++)t.unshift(e[o]);0==t.length&&(c.plugins.earth&&n.loadPlugin(c.plugins.earth()),c.plugins.pings&&n.loadPlugin(c.plugins.pings()));for(var o=0;o<t.length;o++)t[o](n)},a=function(n,t,o){if(o.onInit.length){var i=0,e=function(n){var t=o.onInit[i];t.length?t(function(){i++,n()}):(t(),i++,setTimeout(n,0))},l=function(){i>=o.onInit.length?r(n,t,o):e(l)};e(l)}else r(n,t,o)},u=function(n,t,o,i){l(n,o),n.canvas=t,n.context=t.getContext("2d"),a(n,t,i)},c={plugins:{},noConflict:function(){return o.planetaryjs=i,c},loadPlugin:function(n){e.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},i={plugins:{},draw:function(n){u(i,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return i.projection=n.geo.orthographic().clipAngle(90).precision(0),i.path=n.geo.path().projection(i.projection),i}};return c.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(i){if(t.world)o.plugins.topojson.world=t.world,setTimeout(i,0);else{var e=t.file||"world-110m.json";n.json(e,function(n,t){if(n)throw new Error("Could not load JSON "+e);o.plugins.topojson.world=t,i()})}})}},c.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},c.plugins.land=function(n){return function(o){var i=null;o.onInit(function(){var n=o.plugins.topojson.world;i=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),0!=n.fill&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},c.plugins.borders=function(n){return function(o){var i=null,e={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,a=n.type||"internal";i=t.mesh(r,l,e[a])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},c.plugins.earth=function(n){var n=n||{},t=n.topojson||{},o=n.oceans||{},i=n.land||{},e=n.borders||{};return function(n){c.plugins.topojson(t)(n),c.plugins.oceans(o)(n),c.plugins.land(i)(n),c.plugins.borders(e)(n)}},c.plugins.pings=function(t){var o=[],i=function(n,i,e){var e=e||{};e.color=e.color||t.color||"white",e.ttl=e.ttl||t.ttl||2e3,e.angle=e.angle||t.angle||5,o.push({lat:n,lng:i,time:new Date,options:e})},e=function(n,t,i){for(var e=[],l=0;l<o.length;l++){var a=o[l],u=i-a.time;u<a.options.ttl&&(e.push(a),r(n,t,i,u,a))}o=e},r=function(t,o,i,e,r){var l=1-e/r.options.ttl,a=n.rgb(r.options.color);a="rgba("+a.r+","+a.g+","+a.b+","+l+")",o.strokeStyle=a;var u=n.geo.circle().origin([r.lng,r.lat]).angle(e/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(u),o.stroke()};return function(n){n.plugins.pings={add:i},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){e(n,o,t)})})}},c.plugins.zoom=function(t){var t=t||{},o=function(){},i=t.onZoomStart||o,e=t.onZoomEnd||o,r=t.onZoom||o,l=t.initialScale,a=t.scaleExtent||[50,2e3];return function(t){t.onInit(function(){var o=n.behavior.zoom().scaleExtent(a);l?o.scale(l):o.scale(t.projection.scale()),o.on("zoomstart",i).on("zoomend",e).on("zoom",function(){r(),t.projection.scale(n.event.scale)}),n.select(t.canvas).call(o)})}},c.plugins.drag=function(t){var t=t||{},o=function(){},i=t.onDragStart||o,e=t.onDragEnd||o,r=t.onDrag||o;return function(t){t.onInit(function(){var o=n.behavior.drag().on("dragstart",i).on("dragend",e).on("drag",function(){r();var o=n.event.dx,i=n.event.dy,e=t.projection.rotate(),l=t.projection.scale(),a=n.scale.linear().domain([-1*l,l]).range([-90,90]),u=a(o),c=a(i);e[0]+=u,e[1]-=c,e[1]>90&&(e[1]=90),e[1]<-90&&(e[1]=-90),e[0]>=180&&(e[0]-=360),t.projection.rotate(e)});n.select(t.canvas).call(o)})}},c});
\ No newline at end of file
diff --git a/src/plugins.js b/src/plugins.js
index 1e1346b..4aad5af 100644
--- a/src/plugins.js
+++ b/src/plugins.js
@@ -161,3 +161,68 @@
       });
     };
   };
+
+  planetaryjs.plugins.zoom = function (options) {
+    var options = options || {};
+    var noop = function() {};
+    var onZoomStart = options.onZoomStart || noop;
+    var onZoomEnd   = options.onZoomEnd   || noop;
+    var onZoom      = options.onZoom      || noop;
+    var startScale  = options.initialScale;
+    var scaleExtent = options.scaleExtent || [50, 2000];
+
+    return function(planet) {
+      planet.onInit(function() {
+        var zoom = d3.behavior.zoom()
+          .scaleExtent(scaleExtent);
+        if (startScale) {
+          zoom.scale(startScale);
+        } else {
+          zoom.scale(planet.projection.scale());
+        }
+        zoom
+          .on('zoomstart', onZoomStart)
+          .on('zoomend', onZoomEnd)
+          .on('zoom', function() {
+            onZoom();
+            planet.projection.scale(d3.event.scale);
+          });
+        d3.select(planet.canvas).call(zoom);
+      });
+    };
+  };
+
+  planetaryjs.plugins.drag = function(options) {
+    var options = options || {};
+    var noop = function() {};
+    var onDragStart = options.onDragStart || noop;
+    var onDragEnd   = options.onDragEnd   || noop;
+    var onDrag      = options.onDrag      || noop;
+
+    return function(planet) {
+      planet.onInit(function() {
+        var drag = d3.behavior.drag()
+          .on('dragstart', onDragStart)
+          .on('dragend', onDragEnd)
+          .on('drag', function() {
+            onDrag();
+            var dx = d3.event.dx;
+            var dy = d3.event.dy;
+            var rotation = planet.projection.rotate();
+            var radius = planet.projection.scale();
+            var scale = d3.scale.linear()
+              .domain([-1 * radius, radius])
+              .range([-90, 90]);
+            var degX = scale(dx);
+            var degY = scale(dy);
+            rotation[0] += degX;
+            rotation[1] -= degY;
+            if (rotation[1] > 90)   rotation[1] = 90;
+            if (rotation[1] < -90)  rotation[1] = -90;
+            if (rotation[0] >= 180) rotation[0] -= 360;
+            planet.projection.rotate(rotation);
+          });
+        d3.select(planet.canvas).call(drag);
+      });
+    };
+  };