Exemple #1
0
// Plot implements the plot.Plotter interface.
func (b *BarChart) Plot(c draw.Canvas, plt *plot.Plot) {
	trX, trY := plt.Transforms(&c)

	for i, ht := range b.Values {
		x := b.XMin + float64(i)
		xmin := trX(float64(x))
		if !c.ContainsX(xmin) {
			continue
		}
		xmin = xmin - b.Width/2 + b.Offset
		xmax := xmin + b.Width
		bottom := b.stackedOn.BarHeight(i)
		ymin := trY(bottom)
		ymax := trY(bottom + ht)

		pts := []draw.Point{
			{xmin, ymin},
			{xmin, ymax},
			{xmax, ymax},
			{xmax, ymin},
		}
		poly := c.ClipPolygonY(pts)
		c.FillPolygon(b.Color, poly)

		pts = append(pts, draw.Point{xmin, ymin})
		outline := c.ClipLinesY(pts)
		c.StrokeLines(b.LineStyle, outline...)
	}
}
Exemple #2
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// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (f *Function) Plot(c draw.Canvas, p *plot.Plot) {
	trX, trY := p.Transforms(&c)

	d := (p.X.Max - p.X.Min) / float64(f.Samples-1)
	line := make([]draw.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))
	}

	// For every continuous block of non-NaN Y values, stroke lines
	for i := 0; i < len(line); i++ {
		if !math.IsNaN(float64(line[i].Y)) {
			j := i + 1
			for ; j < len(line); j++ {
				if math.IsNaN(float64(line[j].Y)) {
					break
				}
			}
			c.StrokeLines(f.LineStyle, c.ClipLinesXY(line[i:j])...)
			i = j
		}
	}
}
Exemple #3
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// Plot draws the Line, implementing the plot.Plotter interface.
func (rp *ResponsePlotter) Plot(canvas vgdraw.Canvas, plt *plot.Plot) {
	trX, trY := plt.Transforms(&canvas)

	start := float64(rp.Response.GetStartTime())
	step := float64(rp.Response.GetStepTime())
	absent := rp.Response.IsAbsent

	lines := make([][]vgdraw.Point, 1)
	lines[0] = make([]vgdraw.Point, 0, len(rp.Response.Values))

	/* ikruglov
	 * swithing between lineMode and looping inside
	 * is more branch-prediction friendly i.e. potentially faster */
	switch rp.lineMode {
	case "slope":
		currentLine := 0
		lastAbsent := false
		for i, v := range rp.Response.Values {
			if absent[i] {
				lastAbsent = true
			} else if lastAbsent {
				currentLine++
				lines = append(lines, make([]vgdraw.Point, 1))
				lines[currentLine][0] = vgdraw.Point{X: trX(start + float64(i)*step), Y: trY(v)}
				lastAbsent = false
			} else {
				lines[currentLine] = append(lines[currentLine], vgdraw.Point{X: trX(start + float64(i)*step), Y: trY(v)})
			}
		}

	case "connected":
		for i, v := range rp.Response.Values {
			if absent[i] {
				continue
			}

			lines[0] = append(lines[0], vgdraw.Point{X: trX(start + float64(i)*step), Y: trY(v)})
		}

	case "drawAsInfinite":
		for i, v := range rp.Response.Values {
			if !absent[i] && v > 0 {
				infiniteLine := []vgdraw.Point{
					vgdraw.Point{X: trX(start + float64(i)*step), Y: canvas.Y(1)},
					vgdraw.Point{X: trX(start + float64(i)*step), Y: canvas.Y(0)},
				}
				lines = append(lines, infiniteLine)
			}
		}

	//case "staircase": // TODO
	default:
		panic("Unimplemented " + rp.lineMode)
	}

	canvas.StrokeLines(rp.LineStyle, lines...)
}
Exemple #4
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// Plot implements the plot.Plotter interface.
func (b *BarChart) Plot(c draw.Canvas, plt *plot.Plot) {
	trCat, trVal := plt.Transforms(&c)
	if b.Horizontal {
		trCat, trVal = trVal, trCat
	}

	for i, ht := range b.Values {
		catVal := b.XMin + float64(i)
		catMin := trCat(float64(catVal))
		if !b.Horizontal {
			if !c.ContainsX(catMin) {
				continue
			}
		} else {
			if !c.ContainsY(catMin) {
				continue
			}
		}
		catMin = catMin - b.Width/2 + b.Offset
		catMax := catMin + b.Width
		bottom := b.stackedOn.BarHeight(i)
		valMin := trVal(bottom)
		valMax := trVal(bottom + ht)

		var pts []draw.Point
		var poly []draw.Point
		if !b.Horizontal {
			pts = []draw.Point{
				{catMin, valMin},
				{catMin, valMax},
				{catMax, valMax},
				{catMax, valMin},
			}
			poly = c.ClipPolygonY(pts)
		} else {
			pts = []draw.Point{
				{valMin, catMin},
				{valMin, catMax},
				{valMax, catMax},
				{valMax, catMin},
			}
			poly = c.ClipPolygonX(pts)
		}
		c.FillPolygon(b.Color, poly)

		var outline [][]draw.Point
		if !b.Horizontal {
			pts = append(pts, draw.Point{X: catMin, Y: valMin})
			outline = c.ClipLinesY(pts)
		} else {
			pts = append(pts, draw.Point{X: valMin, Y: catMin})
			outline = c.ClipLinesX(pts)
		}
		c.StrokeLines(b.LineStyle, outline...)
	}
}
Exemple #5
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// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (f *Function) Plot(c draw.Canvas, p *plot.Plot) {
	trX, trY := p.Transforms(&c)

	d := (p.X.Max - p.X.Min) / float64(f.Samples-1)
	line := make([]draw.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))
	}
	c.StrokeLines(f.LineStyle, c.ClipLinesXY(line)...)
}
Exemple #6
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func (g GlyphBoxes) Plot(c draw.Canvas, plt *plot.Plot) {
	for _, b := range plt.GlyphBoxes(plt) {
		x := c.X(b.X) + b.Rectangle.Min.X
		y := c.Y(b.Y) + b.Rectangle.Min.Y
		c.StrokeLines(g.LineStyle, []draw.Point{
			{x, y},
			{x + b.Rectangle.Size().X, y},
			{x + b.Rectangle.Size().X, y + b.Rectangle.Size().Y},
			{x, y + b.Rectangle.Size().Y},
			{x, y},
		})
	}
}
Exemple #7
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// Plot implements the Plotter interface, drawing labels.
func (e *YErrorBars) Plot(c draw.Canvas, p *plot.Plot) {
	trX, trY := p.Transforms(&c)
	for i, err := range e.YErrors {
		x := trX(e.XYs[i].X)
		ylow := trY(e.XYs[i].Y - math.Abs(err.Low))
		yhigh := trY(e.XYs[i].Y + math.Abs(err.High))

		bar := c.ClipLinesY([]draw.Point{{x, ylow}, {x, yhigh}})
		c.StrokeLines(e.LineStyle, bar...)
		e.drawCap(&c, x, ylow)
		e.drawCap(&c, x, yhigh)
	}
}
Exemple #8
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// Plot implements the Plotter interface, drawing labels.
func (e *XErrorBars) Plot(c draw.Canvas, p *plot.Plot) {
	trX, trY := p.Transforms(&c)
	for i, err := range e.XErrors {
		y := trY(e.XYs[i].Y)
		xlow := trX(e.XYs[i].X - math.Abs(err.Low))
		xhigh := trX(e.XYs[i].X + math.Abs(err.High))

		bar := c.ClipLinesX([]draw.Point{{xlow, y}, {xhigh, y}})
		c.StrokeLines(e.LineStyle, bar...)
		e.drawCap(&c, xlow, y)
		e.drawCap(&c, xhigh, y)
	}
}
Exemple #9
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func (b *BarChart) Thumbnail(c *draw.Canvas) {
	pts := []draw.Point{
		{c.Min.X, c.Min.Y},
		{c.Min.X, c.Max.Y},
		{c.Max.X, c.Max.Y},
		{c.Max.X, c.Min.Y},
	}
	poly := c.ClipPolygonY(pts)
	c.FillPolygon(b.Color, poly)

	pts = append(pts, draw.Point{c.Min.X, c.Min.Y})
	outline := c.ClipLinesY(pts)
	c.StrokeLines(b.LineStyle, outline...)
}
Exemple #10
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// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (h *Histogram) Plot(c draw.Canvas, p *plot.Plot) {
	trX, trY := p.Transforms(&c)

	for _, bin := range h.Bins {
		pts := []draw.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 {
			c.FillPolygon(h.FillColor, c.ClipPolygonXY(pts))
		}
		pts = append(pts, draw.Point{trX(bin.Min), trY(0)})
		c.StrokeLines(h.LineStyle, c.ClipLinesXY(pts)...)
	}
}
Exemple #11
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// Thumbnail draws a rectangle in the given style of the histogram.
func (h *Histogram) Thumbnail(c *draw.Canvas) {
	ymin := c.Min.Y
	ymax := c.Max.Y
	xmin := c.Min.X
	xmax := c.Max.X

	pts := []draw.Point{
		{xmin, ymin},
		{xmax, ymin},
		{xmax, ymax},
		{xmin, ymax},
	}
	if h.FillColor != nil {
		c.FillPolygon(h.FillColor, c.ClipPolygonXY(pts))
	}
	pts = append(pts, draw.Point{xmin, ymin})
	c.StrokeLines(h.LineStyle, c.ClipLinesXY(pts)...)
}
Exemple #12
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// Plot draws the Line, implementing the plot.Plotter
// interface.
func (pts *Line) Plot(c draw.Canvas, plt *plot.Plot) {
	trX, trY := plt.Transforms(&c)
	ps := make([]draw.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 {
		c.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()
		c.Fill(pa)
	}

	c.StrokeLines(pts.LineStyle, c.ClipLinesXY(ps)...)
}
Exemple #13
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// Plot draws the BoxPlot on Canvas c and Plot plt.
func (b *BoxPlot) Plot(c draw.Canvas, plt *plot.Plot) {
	if b.Horizontal {
		b := &horizBoxPlot{b}
		b.Plot(c, plt)
		return
	}

	trX, trY := plt.Transforms(&c)
	x := trX(b.Location)
	if !c.ContainsX(x) {
		return
	}
	x += b.Offset

	med := trY(b.Median)
	q1 := trY(b.Quartile1)
	q3 := trY(b.Quartile3)
	aLow := trY(b.AdjLow)
	aHigh := trY(b.AdjHigh)

	box := c.ClipLinesY([]draw.Point{
		{x - b.Width/2, q1},
		{x - b.Width/2, q3},
		{x + b.Width/2, q3},
		{x + b.Width/2, q1},
		{x - b.Width/2 - b.BoxStyle.Width/2, q1},
	})
	c.StrokeLines(b.BoxStyle, box...)

	medLine := c.ClipLinesY([]draw.Point{
		{x - b.Width/2, med},
		{x + b.Width/2, med},
	})
	c.StrokeLines(b.MedianStyle, medLine...)

	cap := b.CapWidth / 2
	whisks := c.ClipLinesY([]draw.Point{{x, q3}, {x, aHigh}},
		[]draw.Point{{x - cap, aHigh}, {x + cap, aHigh}},
		[]draw.Point{{x, q1}, {x, aLow}},
		[]draw.Point{{x - cap, aLow}, {x + cap, aLow}})
	c.StrokeLines(b.WhiskerStyle, whisks...)

	for _, out := range b.Outside {
		y := trY(b.Value(out))
		if c.ContainsY(y) {
			c.DrawGlyphNoClip(b.GlyphStyle, draw.Point{X: x, Y: y})
		}
	}
}
Exemple #14
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func (b HorizBoxPlot) Plot(c draw.Canvas, plt *plot.Plot) {
	trX, trY := plt.Transforms(&c)
	y := trY(b.Location)
	if !c.ContainsY(y) {
		return
	}
	y += b.Offset

	med := trX(b.Median)
	q1 := trX(b.Quartile1)
	q3 := trX(b.Quartile3)
	aLow := trX(b.AdjLow)
	aHigh := trX(b.AdjHigh)

	box := c.ClipLinesX([]draw.Point{
		{q1, y - b.Width/2},
		{q3, y - b.Width/2},
		{q3, y + b.Width/2},
		{q1, y + b.Width/2},
		{q1, y - b.Width/2 - b.BoxStyle.Width/2},
	})
	c.StrokeLines(b.BoxStyle, box...)

	medLine := c.ClipLinesX([]draw.Point{
		{med, y - b.Width/2},
		{med, y + b.Width/2},
	})
	c.StrokeLines(b.MedianStyle, medLine...)

	cap := b.CapWidth / 2
	whisks := c.ClipLinesX([]draw.Point{{q3, y}, {aHigh, y}},
		[]draw.Point{{aHigh, y - cap}, {aHigh, y + cap}},
		[]draw.Point{{q1, y}, {aLow, y}},
		[]draw.Point{{aLow, y - cap}, {aLow, y + cap}})
	c.StrokeLines(b.WhiskerStyle, whisks...)

	for _, out := range b.Outside {
		x := trX(b.Value(out))
		if c.ContainsX(x) {
			c.DrawGlyphNoClip(b.GlyphStyle, draw.Point{x, y})
		}
	}
}