Added method for drawing lines between 3D points

lib/graph3d/Graph3d.js

@@ -1230,6 +1230,19 @@ Graph3d.prototype._line = function(ctx, from, to, strokeStyle) {
 }
 
 
+/**
+ * Draw a line between 2d points 'from' and 'to'.
+ *
+ * If stroke style specified, set that as well.
+ */
+Graph3d.prototype._line3d = function(ctx, from, to, strokeStyle) {
+  var from2d = this._convert3Dto2D(from);
+  var to2d   = this._convert3Dto2D(to);
+
+  this._line(ctx, from2d, to2d, strokeStyle);
+}
+
+
 /**
  * Redraw the axis
  */
@@ -1262,18 +1275,18 @@ Graph3d.prototype._redrawAxis = function() {
     var x = step.getCurrent();
 
     if (this.showGrid) {
-      from = this._convert3Dto2D(new Point3d(x, this.yMin, this.zMin));
-      to = this._convert3Dto2D(new Point3d(x, this.yMax, this.zMin));
-      this._line(ctx, from, to, this.gridColor);
+      from = new Point3d(x, this.yMin, this.zMin);
+      to   = new Point3d(x, this.yMax, this.zMin);
+      this._line3d(ctx, from, to, this.gridColor);
     }
     else {
-      from = this._convert3Dto2D(new Point3d(x, this.yMin, this.zMin));
-      to = this._convert3Dto2D(new Point3d(x, this.yMin+gridLenX, this.zMin));
-      this._line(ctx, from, to, this.axisColor);
+      from = new Point3d(x, this.yMin, this.zMin);
+      to   = new Point3d(x, this.yMin+gridLenX, this.zMin);
+      this._line3d(ctx, from, to, this.axisColor);
 
-      from = this._convert3Dto2D(new Point3d(x, this.yMax, this.zMin));
-      to = this._convert3Dto2D(new Point3d(x, this.yMax-gridLenX, this.zMin));
-      this._line(ctx, from, to, this.axisColor);
+      from = new Point3d(x, this.yMax, this.zMin);
+      to   = new Point3d(x, this.yMax-gridLenX, this.zMin);
+      this._line3d(ctx, from, to, this.axisColor);
     }
 
     yText = (Math.cos(armAngle) > 0) ? this.yMin : this.yMax;
@@ -1307,18 +1320,18 @@ Graph3d.prototype._redrawAxis = function() {
   }
   while (!step.end()) {
     if (this.showGrid) {
-      from = this._convert3Dto2D(new Point3d(this.xMin, step.getCurrent(), this.zMin));
-      to = this._convert3Dto2D(new Point3d(this.xMax, step.getCurrent(), this.zMin));
-      this._line(ctx, from, to, this.gridColor);
+      from = new Point3d(this.xMin, step.getCurrent(), this.zMin);
+      to   = new Point3d(this.xMax, step.getCurrent(), this.zMin);
+      this._line3d(ctx, from, to, this.gridColor);
     }
     else {
-      from = this._convert3Dto2D(new Point3d(this.xMin, step.getCurrent(), this.zMin));
-      to = this._convert3Dto2D(new Point3d(this.xMin+gridLenY, step.getCurrent(), this.zMin));
-      this._line(ctx, from, to, this.axisColor);
+      from = new Point3d(this.xMin, step.getCurrent(), this.zMin);
+      to   = new Point3d(this.xMin+gridLenY, step.getCurrent(), this.zMin);
+      this._line3d(ctx, from, to, this.axisColor);
 
-      from = this._convert3Dto2D(new Point3d(this.xMax, step.getCurrent(), this.zMin));
-      to = this._convert3Dto2D(new Point3d(this.xMax-gridLenY, step.getCurrent(), this.zMin));
-      this._line(ctx, from, to, this.axisColor);
+      from = new Point3d(this.xMax, step.getCurrent(), this.zMin);
+      to   = new Point3d(this.xMax-gridLenY, step.getCurrent(), this.zMin);
+      this._line3d(ctx, from, to, this.axisColor);
     }
 
     xText = (Math.sin(armAngle ) > 0) ? this.xMin : this.xMax;
@@ -1366,31 +1379,31 @@ Graph3d.prototype._redrawAxis = function() {
     step.next();
   }
   ctx.lineWidth = 1;
-  from = this._convert3Dto2D(new Point3d(xText, yText, this.zMin));
-  to = this._convert3Dto2D(new Point3d(xText, yText, this.zMax));
-  this._line(ctx, from, to, this.axisColor);
+  from = new Point3d(xText, yText, this.zMin);
+  to   = new Point3d(xText, yText, this.zMax);
+  this._line3d(ctx, from, to, this.axisColor);
 
   // draw x-axis
   ctx.lineWidth = 1;
   // line at yMin
-  xMin2d = this._convert3Dto2D(new Point3d(this.xMin, this.yMin, this.zMin));
-  xMax2d = this._convert3Dto2D(new Point3d(this.xMax, this.yMin, this.zMin));
-  this._line(ctx, xMin2d, xMax2d, this.axisColor);
+  xMin2d = new Point3d(this.xMin, this.yMin, this.zMin);
+  xMax2d = new Point3d(this.xMax, this.yMin, this.zMin);
+  this._line3d(ctx, xMin2d, xMax2d, this.axisColor);
   // line at ymax
-  xMin2d = this._convert3Dto2D(new Point3d(this.xMin, this.yMax, this.zMin));
-  xMax2d = this._convert3Dto2D(new Point3d(this.xMax, this.yMax, this.zMin));
-  this._line(ctx, xMin2d, xMax2d, this.axisColor);
+  xMin2d = new Point3d(this.xMin, this.yMax, this.zMin);
+  xMax2d = new Point3d(this.xMax, this.yMax, this.zMin);
+  this._line3d(ctx, xMin2d, xMax2d, this.axisColor);
 
   // draw y-axis
   ctx.lineWidth = 1;
   // line at xMin
-  from = this._convert3Dto2D(new Point3d(this.xMin, this.yMin, this.zMin));
-  to = this._convert3Dto2D(new Point3d(this.xMin, this.yMax, this.zMin));
-  this._line(ctx, from, to, this.axisColor);
+  from = new Point3d(this.xMin, this.yMin, this.zMin);
+  to   = new Point3d(this.xMin, this.yMax, this.zMin);
+  this._line3d(ctx, from, to, this.axisColor);
   // line at xMax
-  from = this._convert3Dto2D(new Point3d(this.xMax, this.yMin, this.zMin));
-  to = this._convert3Dto2D(new Point3d(this.xMax, this.yMax, this.zMin));
-  this._line(ctx, from, to, this.axisColor);
+  from = new Point3d(this.xMax, this.yMin, this.zMin);
+  to   = new Point3d(this.xMax, this.yMax, this.zMin);
+  this._line3d(ctx, from, to, this.axisColor);
 
   // draw x-label
   var xLabel = this.xLabel;