Implement pickable feature for renderer3D. Fixes xtk#107.

Author: medihack

injects/displayable.js

@@ -175,6 +175,14 @@ X.displayable = function() {
    * @protected
    */
   this._distance = 0;
+
+  /**
+   * The flag if this object is pickable.
+   *
+   * @type {!boolean}
+   * @protected
+   */
+  this._pickable = true;
 
 };
 
@@ -594,3 +602,37 @@ X.displayable.prototype.__defineSetter__('linewidth', function(width) {
   // no modified event since the rendering loop always checks it
 
 });
+
+
+/**
+ * Get the pickable flag.
+ *
+ * @return {!boolean} The pickable flag.
+ */
+X.displayable.prototype.__defineGetter__('pickable', function() {
+
+  return this._pickable;
+
+});
+
+
+/**
+ * Set the pickable flag.
+ *
+ * @param {!boolean} pickable The pickable flag.
+ */
+X.displayable.prototype.__defineSetter__('pickable', function(pickable) {
+
+  if (!goog.isBoolean(pickable)) {
+
+    throw new Error('Invalid pickable setting.');
+
+  }
+
+  this._pickable = pickable;
+
+  this._dirty = true;
+
+  // no modified event since the rendering loop always checks it
+
+});

objects/object.js

@@ -171,6 +171,8 @@ X.object.prototype.copy_ = function(object) {
 
   this._magicmode = object._magicmode;
 
+  this._pickable = object._pickable;
+
   this._pointIndices = object._pointIndices.slice();
 
   this._dirty = true;

objects/testing/object_test.js

@@ -29,6 +29,7 @@ function testXobjectCopy() {
   o.linewidth = 3;
   o.caption = 'testing';
   o.magicmode = true;
+  o.pickable = false;
 
   // now we want to copy the object
   var o2 = new X.object(o);
@@ -64,5 +65,6 @@ function testXobjectCopy() {
   assertEquals(o.linewidth, o2.linewidth);
   assertEquals(o.caption, o2.caption);
   assertEquals(o.magicmode, o2.magicmode);
+  assertEquals(o.pickable, o2.pickable);
 
 }

visualization/renderer3D.js

@@ -1599,6 +1599,13 @@ X.renderer3D.prototype.render_ = function(picking, invoked) {
 
       }
 
+      // check picking mode and object pickable
+      if (picking && !object._pickable) {
+
+        // object not pickable, continue to next one
+        continue;
+      }
+
       var id = object._id;
 
       var magicMode = object._magicmode;