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// 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 plotter_test
import (
"image/color"
"testing"
"gonum.org/v1/plot"
"gonum.org/v1/plot/cmpimg"
"gonum.org/v1/plot/plotter"
"gonum.org/v1/plot/vg"
"gonum.org/v1/plot/vg/draw"
"gonum.org/v1/plot/vg/recorder"
)
func TestPolygon_holes(t *testing.T) {
cmpimg.CheckPlot(ExamplePolygon_holes, t, "polygon_holes.png", "polygon_holes.svg", "polygon_holes.pdf", "polygon_holes.eps")
}
func TestPolygon_hexagons(t *testing.T) {
cmpimg.CheckPlot(ExamplePolygon_hexagons, t, "polygon_hexagons.png")
}
// This test ensures that the plotter doesn't panic if there are
// polygons wholly outside of the plotting range.
func TestPolygon_clip(t *testing.T) {
poly, err := plotter.NewPolygon(
plotter.XYs{{0, 0}, {1, 0}, {1, 1}, {0, 1}, {0, 0}},
)
if err != nil {
t.Fatal(err)
}
poly.Color = color.Black // Give the polygon a color to fill.
p, err := plot.New()
if err != nil {
t.Fatal(err)
}
// Set the plotting range so that the polygon is outside of it.
p.X.Min = 2
p.X.Max = 5
p.Add(poly)
c := new(recorder.Canvas)
dc := draw.NewCanvas(c, vg.Centimeter, vg.Centimeter)
p.Draw(dc) // If this does not panic, then the test passes.
}
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