fixed dependencies

vendor/gonum.org/v1/plot/plotutil/plotutil.go

@@ -0,0 +1,116 @@
+// Copyright ©2015 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 plotutil contains a small number of utilites for creating plots.
+//
+// This package is under active development so portions of it may change.
+package plotutil // import "gonum.org/v1/plot/plotutil"
+
+import (
+	"image/color"
+
+	"gonum.org/v1/plot/vg"
+	"gonum.org/v1/plot/vg/draw"
+)
+
+// DefaultColors is a set of colors used by the Color function.
+var DefaultColors = SoftColors
+
+var DarkColors = []color.Color{
+	rgb(238, 46, 47),
+	rgb(0, 140, 72),
+	rgb(24, 90, 169),
+	rgb(244, 125, 35),
+	rgb(102, 44, 145),
+	rgb(162, 29, 33),
+	rgb(180, 56, 148),
+}
+
+var SoftColors = []color.Color{
+	rgb(241, 90, 96),
+	rgb(122, 195, 106),
+	rgb(90, 155, 212),
+	rgb(250, 167, 91),
+	rgb(158, 103, 171),
+	rgb(206, 112, 88),
+	rgb(215, 127, 180),
+}
+
+func rgb(r, g, b uint8) color.RGBA {
+	return color.RGBA{r, g, b, 255}
+}
+
+// Color returns the ith default color, wrapping
+// if i is less than zero or greater than the max
+// number of colors in the DefaultColors slice.
+func Color(i int) color.Color {
+	n := len(DefaultColors)
+	if i < 0 {
+		return DefaultColors[i%n+n]
+	}
+	return DefaultColors[i%n]
+}
+
+// DefaultGlyphShapes is a set of GlyphDrawers used by
+// the Shape function.
+var DefaultGlyphShapes = []draw.GlyphDrawer{
+	draw.RingGlyph{},
+	draw.SquareGlyph{},
+	draw.TriangleGlyph{},
+	draw.CrossGlyph{},
+	draw.PlusGlyph{},
+	draw.CircleGlyph{},
+	draw.BoxGlyph{},
+	draw.PyramidGlyph{},
+}
+
+// Shape returns the ith default glyph shape,
+// wrapping if i is less than zero or greater
+// than the max number of GlyphDrawers
+// in the DefaultGlyphShapes slice.
+func Shape(i int) draw.GlyphDrawer {
+	n := len(DefaultGlyphShapes)
+	if i < 0 {
+		return DefaultGlyphShapes[i%n+n]
+	}
+	return DefaultGlyphShapes[i%n]
+}
+
+// DefaultDashes is a set of dash patterns used by
+// the Dashes function.
+var DefaultDashes = [][]vg.Length{
+	{},
+
+	{vg.Points(6), vg.Points(2)},
+
+	{vg.Points(2), vg.Points(2)},
+
+	{vg.Points(1), vg.Points(1)},
+
+	{vg.Points(5), vg.Points(2), vg.Points(1), vg.Points(2)},
+
+	{vg.Points(10), vg.Points(2), vg.Points(2), vg.Points(2),
+		vg.Points(2), vg.Points(2), vg.Points(2), vg.Points(2)},
+
+	{vg.Points(10), vg.Points(2), vg.Points(2), vg.Points(2)},
+
+	{vg.Points(5), vg.Points(2), vg.Points(5), vg.Points(2),
+		vg.Points(2), vg.Points(2), vg.Points(2), vg.Points(2)},
+
+	{vg.Points(4), vg.Points(2), vg.Points(4), vg.Points(1),
+		vg.Points(1), vg.Points(1), vg.Points(1), vg.Points(1),
+		vg.Points(1), vg.Points(1)},
+}
+
+// Dashes returns the ith default dash pattern,
+// wrapping if i is less than zero or greater
+// than the max number of dash patters
+// in the DefaultDashes slice.
+func Dashes(i int) []vg.Length {
+	n := len(DefaultDashes)
+	if i < 0 {
+		return DefaultDashes[i%n+n]
+	}
+	return DefaultDashes[i%n]
+}