예제 #1
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// Plot draws the Line, implementing the plot.Plotter
// interface.
func (pts *Line) Plot(da plot.DrawArea, plt *plot.Plot) {
	trX, trY := plt.Transforms(&da)
	ps := make([]plot.Point, len(pts.XYs))
	for i, p := range pts.XYs {
		ps[i].X = trX(p.X)
		ps[i].Y = trY(p.Y)
	}
	da.StrokeLines(pts.LineStyle, da.ClipLinesXY(ps)...)
}
예제 #2
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func (pts *VerticalLine) Plot(da plot.DrawArea, plt *plot.Plot) {
	trX, _ := plt.Transforms(&da)
	ps := make([]plot.Point, 2)
	ps[0].X = trX(pts.X)
	ps[1].X = ps[0].X

	ps[0].Y = da.Min.Y
	ps[1].Y = da.Max().Y

	da.StrokeLines(pts.LineStyle, da.ClipLinesXY(ps)...)
}
예제 #3
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파일: functions.go 프로젝트: jen6/plotinum
// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (f *Function) Plot(da plot.DrawArea, p *plot.Plot) {
	trX, trY := p.Transforms(&da)

	d := (p.X.Max - p.X.Min) / float64(f.Samples-1)
	line := make([]plot.Point, f.Samples)
	for i := range line {
		x := p.X.Min + float64(i)*d
		line[i].X = trX(x)
		line[i].Y = trY(f.F(x))
	}
	da.StrokeLines(f.LineStyle, da.ClipLinesXY(line)...)
}
예제 #4
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func (pts *HorizontalLine) Plot(da plot.DrawArea, plt *plot.Plot) {
	_, trY := plt.Transforms(&da)
	ps := make([]plot.Point, 2)

	ps[0].X = da.Min.X
	ps[1].X = da.Max().X

	ps[0].Y = trY(pts.Y)
	ps[1].Y = ps[0].Y

	da.StrokeLines(pts.LineStyle, da.ClipLinesXY(ps)...)
}
예제 #5
0
파일: histogram.go 프로젝트: jen6/plotinum
// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (h *Histogram) Plot(da plot.DrawArea, p *plot.Plot) {
	trX, trY := p.Transforms(&da)

	for _, bin := range h.Bins {
		pts := []plot.Point{
			{trX(bin.Min), trY(0)},
			{trX(bin.Max), trY(0)},
			{trX(bin.Max), trY(bin.Weight)},
			{trX(bin.Min), trY(bin.Weight)},
		}
		if h.FillColor != nil {
			da.FillPolygon(h.FillColor, da.ClipPolygonXY(pts))
		}
		pts = append(pts, plot.Pt(trX(bin.Min), trY(0)))
		da.StrokeLines(h.LineStyle, da.ClipLinesXY(pts)...)
	}
}
예제 #6
0
파일: line.go 프로젝트: jen6/plotinum
// Plot draws the Line, implementing the plot.Plotter
// interface.
func (pts *Line) Plot(da plot.DrawArea, plt *plot.Plot) {
	trX, trY := plt.Transforms(&da)
	ps := make([]plot.Point, len(pts.XYs))

	for i, p := range pts.XYs {
		ps[i].X = trX(p.X)
		ps[i].Y = trY(p.Y)
	}

	if pts.ShadeColor != nil && len(ps) > 0 {
		da.SetColor(*pts.ShadeColor)
		minY := trY(plt.Y.Min)
		var pa vg.Path
		pa.Move(ps[0].X, minY)
		for i := range pts.XYs {
			pa.Line(ps[i].X, ps[i].Y)
		}
		pa.Line(ps[len(pts.XYs)-1].X, minY)
		pa.Close()
		da.Fill(pa)
	}

	da.StrokeLines(pts.LineStyle, da.ClipLinesXY(ps)...)
}