fixed dependencies

vendor/gonum.org/v1/plot/vg/geom.go

@@ -0,0 +1,66 @@
+// Copyright ©2016 The Gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package vg
+
+// A Point is a location in 2d space.
+//
+// Points are used for drawing, not for data.  For
+// data, see the XYer interface.
+type Point struct {
+	X, Y Length
+}
+
+// Dot returns the dot product of two points.
+func (p Point) Dot(q Point) Length {
+	return p.X*q.X + p.Y*q.Y
+}
+
+// Add returns the component-wise sum of two points.
+func (p Point) Add(q Point) Point {
+	return Point{p.X + q.X, p.Y + q.Y}
+}
+
+// Sub returns the component-wise difference of two points.
+func (p Point) Sub(q Point) Point {
+	return Point{p.X - q.X, p.Y - q.Y}
+}
+
+// Scale returns the component-wise product of a point and a scalar.
+func (p Point) Scale(s Length) Point {
+	return Point{p.X * s, p.Y * s}
+}
+
+// A Rectangle represents a rectangular region of 2d space.
+type Rectangle struct {
+	Min Point
+	Max Point
+}
+
+// Size returns the width and height of a Rectangle.
+func (r Rectangle) Size() Point {
+	return Point{
+		X: r.Max.X - r.Min.X,
+		Y: r.Max.Y - r.Min.Y,
+	}
+}
+
+// Add returns the rectangle r translated by p.
+func (r Rectangle) Add(p Point) Rectangle {
+	return Rectangle{
+		Min: r.Min.Add(p),
+		Max: r.Max.Add(p),
+	}
+}
+
+// Path returns the path of a Rect specified by its
+// upper left corner, width and height.
+func (r Rectangle) Path() (p Path) {
+	p.Move(r.Min)
+	p.Line(Point{X: r.Max.X, Y: r.Min.Y})
+	p.Line(r.Max)
+	p.Line(Point{X: r.Min.X, Y: r.Max.Y})
+	p.Close()
+	return
+}