Arg to assign position to the other end of the line.

gui/src/controls/line.ts

@@ -179,14 +179,41 @@ module BABYLON.GUI {
         protected _computeAlignment(parentMeasure: Measure, context: CanvasRenderingContext2D): void {          
             this._currentMeasure.left = Math.min(this._x1.getValue(this._host), this._effectiveX2) - this._lineWidth / 2;
             this._currentMeasure.top = Math.min(this._y1.getValue(this._host), this._effectiveY2) - this._lineWidth / 2;            
-        }   
+        }
+
+        public moveToVector3(position: Vector3, scene: Scene, end: boolean = false): void {
+            if (!this._host || this._root !== this._host._rootContainer) {
+                Tools.Error("Cannot move a control to a vector3 if the control is not at root level");
+                return;
+            }
+
+            var globalViewport = this._host._getGlobalViewport(scene);
+            var projectedPosition = Vector3.Project(position, Matrix.Identity(), scene.getTransformMatrix(), globalViewport);
 
-        public _moveToProjectedPosition(projectedPosition: Vector3): void {
-            this.x1 = (projectedPosition.x + this._linkOffsetX.getValue(this._host)) + "px";
-            this.y1 = (projectedPosition.y + this._linkOffsetY.getValue(this._host)) + "px";
+            this._moveToProjectedPosition(projectedPosition, end)
+
+            if (projectedPosition.z < 0 || projectedPosition.z > 1) {
+                this.notRenderable = true;
+                return;
+            }
+            this.notRenderable = false;
+        }
+
+        public _moveToProjectedPosition(projectedPosition: Vector3, end: boolean = false): void {
+            
+            let x: string = (projectedPosition.x + this._linkOffsetX.getValue(this._host)) + "px";
+            let y: string = (projectedPosition.y + this._linkOffsetY.getValue(this._host)) + "px";
+
+            if (end) {
+                this.x2 = x;
+                this.y2 = y;
+            } else {
+                this.x1 = x;
+                this.y1 = y;
+            }
 
-            this._x1.ignoreAdaptiveScaling = true;
-            this._y1.ignoreAdaptiveScaling = true;
+            this._left.ignoreAdaptiveScaling = true;
+            this._top.ignoreAdaptiveScaling = true;
         }
     }    
 }