circle object and tool

web/app/circle.js

@@ -0,0 +1,71 @@
+
+TCAD.TWO.Circle = function(c) {
+  TCAD.TWO.SketchObject.call(this);
+  this.c = c;
+  c.parent = this;
+  this.children.push(c);
+  this.r = new TCAD.TWO.Ref(0);
+};
+
+TCAD.TWO.utils.extend(TCAD.TWO.Circle, TCAD.TWO.SketchObject);
+
+TCAD.TWO.Circle.prototype._class = 'TCAD.TWO.Circle';
+
+TCAD.TWO.Circle.prototype.collectParams = function(params) {
+  this.c.collectParams(params);
+  params.push(this.r);
+};
+
+TCAD.TWO.Circle.prototype.getReferencePoint = function() {
+  return this.c;
+};
+
+TCAD.TWO.Circle.prototype.translateImpl = function(dx, dy) {
+  this.c.translate(dx, dy);
+};
+
+TCAD.TWO.Circle.prototype.drawImpl = function(ctx, scale) {
+  ctx.beginPath();
+  ctx.arc(this.c.x, this.c.y, this.r.get(), 0, 2 * Math.PI);
+  ctx.stroke();
+};
+
+
+TCAD.TWO.Circle.prototype.normalDistance = function(aim) {
+  return Math.abs(TCAD.math.distance(aim.x, aim.y, this.c.x, this.c.y) - this.r.get());
+};
+
+
+TCAD.TWO.EditCircleTool = function(viewer, layer) {
+  this.viewer = viewer;
+  this.layer = layer;
+  this.circle = null;
+};
+
+TCAD.TWO.EditCircleTool.prototype.mousemove = function(e) {
+  if (this.circle != null) {
+    var p = this.viewer.screenToModel(e);
+    var r = TCAD.math.distance(p.x, p.y, this.circle.c.x, this.circle.c.y);
+    this.circle.r.set(r);
+    this.viewer.refresh();
+  }
+};
+
+TCAD.TWO.EditCircleTool.prototype.mouseup = function(e) {
+  if (this.circle == null) {
+    var p = this.viewer.screenToModel(e);
+    this.circle = new TCAD.TWO.Circle(
+      new TCAD.TWO.EndPoint(p.x, p.y)
+    );
+    this.layer.objects.push(this.circle);
+    this.viewer.refresh();
+  } else {
+    this.viewer.toolManager.releaseControl();
+  }
+};
+
+TCAD.TWO.EditCircleTool.prototype.mousedown = function(e) {
+};
+
+TCAD.TWO.EditCircleTool.prototype.mousewheel = function(e) {
+};

web/app/main2d.js

@@ -43,6 +43,10 @@ TCAD.App2D = function() {
       app.viewer.toolManager.takeControl(new TCAD.TWO.AddArcTool(app.viewer, layer));
     },
 
+    addCircle : function () {
+      app.viewer.toolManager.takeControl(new TCAD.TWO.EditCircleTool(app.viewer, layer));
+    },
+
     pan : function() {
       app.viewer.toolManager.releaseControl();
     },
@@ -121,6 +125,7 @@ TCAD.App2D = function() {
   
   actionsF.add(actions, 'addSegment');
   actionsF.add(actions, 'addArc');
+  actionsF.add(actions, 'addCircle');
   actionsF.add(actions, 'pan');
   actionsF.add(actions, 'save');
   actionsF.add(actions, 'coincident');

web/canvas.html

@@ -13,6 +13,7 @@
   <script src="lib/dat.gui.min.js"></script>
   <script src="app/canvas.js"></script>
   <script src="app/arc.js"></script>
+  <script src="app/circle.js"></script>
   <script src="app/math/math.js"></script>
 
   <script src="app/math/lm.js"></script>