Added object selection.

Author: davidpiegza

utils/ObjectSelection.js

@@ -0,0 +1,52 @@
+
+
+THREE.ObjectSelection = function(parameters) {
+  var parameters = parameters || {};
+  
+  var mouse = { x: 0, y: 0 };
+  this.projector = new THREE.Projector;
+  this.INTERSECTED;
+  
+  var callbackSelected = parameters.selected;
+
+  document.addEventListener( 'mousemove', onDocumentMouseMove, false );
+  function onDocumentMouseMove( event ) {
+    mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
+    mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
+  }
+  
+  this.render = function(scene, camera) {
+    // find intersections
+    camera.update();
+
+    var vector = new THREE.Vector3( mouse.x, mouse.y, 0.5 );
+    this.projector.unprojectVector( vector, camera );
+
+    var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );
+
+    var intersects = ray.intersectScene( scene );
+    if( intersects.length > 0 ) {
+      if ( this.INTERSECTED != intersects[ 0 ].object ) {
+        if ( this.INTERSECTED ) {
+          this.INTERSECTED.materials[ 0 ].color.setHex( this.INTERSECTED.currentHex );
+        }
+
+        this.INTERSECTED = intersects[ 0 ].object;
+        this.INTERSECTED.currentHex = this.INTERSECTED.materials[ 0 ].color.getHex();
+        this.INTERSECTED.materials[ 0 ].color.setHex( 0xff0000 );
+        callbackSelected(this.INTERSECTED);
+      }
+    } else {
+      if ( this.INTERSECTED ) {
+        this.INTERSECTED.materials[ 0 ].color.setHex( this.INTERSECTED.currentHex );
+      }
+      this.INTERSECTED = null;
+    }
+  }  
+}
+
+
+
+
+
+