main.go 4.44 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13
package main

import (
	"flag"
	"fmt"
	"log"
	"math"
	"os"

	"github.com/decibelcooper/proio/go-proio"
	"github.com/decibelcooper/proio/go-proio/model/eic"
	"go-hep.org/x/hep/hbook"
	"gonum.org/v1/plot"
14
	"gonum.org/v1/plot/palette/moreland"
15
	"gonum.org/v1/plot/plotter"
16 17
	"gonum.org/v1/plot/vg/draw"
	"gonum.org/v1/plot/vg/vgimg"
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121

	"github.com/decibelcooper/eicplot"
)

var (
	pTMin    = flag.Float64("minpt", 0.5, "minimum transverse momentum")
	pTMax    = flag.Float64("maxpt", 30, "maximum transverse momentum")
	etaLimit = flag.Float64("etalimit", 4, "maximum absolute value of eta")
	nBinsPT  = flag.Int("nbinspt", 10, "number of bins in transverse momentum")
	nBinsEta = flag.Int("nbinseta", 10, "number of bins in eta")
	title    = flag.String("title", "", "plot title")
	output   = flag.String("output", "out.png", "output file")
)

func printUsage() {
	fmt.Fprintf(os.Stderr, `Usage: `+os.Args[0]+` [options] <proio-input-file>

options:
`,
	)
	flag.PrintDefaults()
}

func main() {
	flag.Usage = printUsage
	flag.Parse()
	if flag.NArg() != 1 {
		printUsage()
		log.Fatal("Invalid arguments")
	}

	p, _ := plot.New()
	p.Title.Text = *title
	p.X.Label.Text = "eta"
	p.Y.Label.Text = "p_T"
	p.X.Tick.Marker = eicplot.PreciseTicks{NSuggestedTicks: 5}
	p.Y.Tick.Marker = eicplot.PreciseTicks{NSuggestedTicks: 5}

	resGrid := NewResGrid(*nBinsEta, -*etaLimit, *etaLimit, *nBinsPT, *pTMin, *pTMax)

	filename := flag.Arg(0)
	reader, err := proio.Open(filename)
	if err != nil {
		log.Fatal(err)
	}

	for event := range reader.ScanEvents() {
		ids := event.TaggedEntries("Reconstructed")
		for _, id := range ids {
			track, ok := event.GetEntry(id).(*eic.Track)
			if !ok {
				continue
			}

			partCandID := make(map[uint64]uint64)
			for _, obsID := range track.Observation {
				eDep, ok := event.GetEntry(obsID).(*eic.EnergyDep)
				if !ok {
					continue
				}

				for _, sourceID := range eDep.Source {
					simHit, ok := event.GetEntry(sourceID).(*eic.SimHit)
					if !ok {
						continue
					}

					partCandID[simHit.Particle]++
				}
			}

			partID := uint64(0)
			hitCount := uint64(0)
			for id, count := range partCandID {
				if count > hitCount {
					partID = id
					hitCount = count
				}
			}

			part, ok := event.GetEntry(partID).(*eic.Particle)
			if !ok {
				continue
			}

			if len(track.Segment) == 0 {
				continue
			}

			pMag := math.Sqrt(math.Pow(part.P.X, 2) + math.Pow(part.P.Y, 2) + math.Pow(part.P.Z, 2))
			eta := math.Atanh(part.P.Z / pMag)
			pT := math.Sqrt(math.Pow(part.P.X, 2) + math.Pow(part.P.Y, 2))
			chargeMag := math.Abs(float64(part.Charge))
			poqMag := pMag / chargeMag
			trackPoqMag := math.Sqrt(math.Pow(track.Segment[0].Poq.X, 2) +
				math.Pow(track.Segment[0].Poq.Y, 2) +
				math.Pow(track.Segment[0].Poq.Z, 2))

			resGrid.Fill(eta, pT, trackPoqMag/poqMag)
		}
	}

	reader.Close()

122 123 124 125 126
	img := vgimg.New(670, 400)
	dc := draw.New(img)
    dc0 := draw.Crop(dc, 0, -70, 0, 0)
    dc1 := draw.Crop(dc, 620, 0, 0, 0)

David Blyth's avatar
David Blyth committed
127
	colorMap := moreland.ExtendedBlackBody()
128
	colorMap.SetMin(0)
129
	colorMap.SetMax(0.05)
130 131
	pal := colorMap.Palette(1000)
	heatMap := plotter.NewHeatMap(resGrid, pal)
132
	heatMap.Min = 0
133
	heatMap.Max = 0.05
David Blyth's avatar
David Blyth committed
134 135
	p.Add(heatMap)

136
	p.Draw(dc0)
David Blyth's avatar
David Blyth committed
137 138 139

	p, _ = plot.New()

140
	colorBar := &plotter.ColorBar{ColorMap: colorMap}
David Blyth's avatar
David Blyth committed
141
	colorBar.Vertical = true
142
	p.Add(colorBar)
David Blyth's avatar
David Blyth committed
143 144
	p.HideX()
	p.Y.Padding = 0
145

146 147 148 149 150 151 152 153 154 155
	p.Draw(dc1)

	w, err := os.Create(*output)
	if err != nil {
		log.Panic(err)
	}
	png := vgimg.PngCanvas{Canvas: img}
	if _, err = png.WriteTo(w); err != nil {
		log.Panic(err)
	}
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
}

type ResGrid struct {
	hCount, hV, hV2 *hbook.H2D
	nBinsX, nBinsY  int
	xLow, xHigh     float64
	yLow, yHigh     float64
}

func NewResGrid(nBinsX int, xLow, xHigh float64, nBinsY int, yLow, yHigh float64) *ResGrid {
	return &ResGrid{
		hbook.NewH2D(nBinsX, xLow, xHigh, nBinsY, yLow, yHigh),
		hbook.NewH2D(nBinsX, xLow, xHigh, nBinsY, yLow, yHigh),
		hbook.NewH2D(nBinsX, xLow, xHigh, nBinsY, yLow, yHigh),
		nBinsX, nBinsY,
		xLow, xHigh,
		yLow, yHigh,
	}
}

func (g *ResGrid) Fill(x, y, z float64) {
	g.hCount.Fill(x, y, 1)
	g.hV.Fill(x, y, z)
	g.hV2.Fill(x, y, z*z)
}

func (g *ResGrid) Dims() (int, int) {
	return g.nBinsX, g.nBinsY
}

func (g *ResGrid) Z(i, j int) float64 {
	n := g.hCount.GridXYZ().Z(i, j)
	if n < 3 {
		return 1
	}
	mean := g.hV.GridXYZ().Z(i, j) / n
	mean2 := g.hV2.GridXYZ().Z(i, j) / n

	stddev := math.Sqrt(mean2 - mean*mean)
	return stddev
}

func (g *ResGrid) X(i int) float64 {
	return g.hCount.GridXYZ().X(i)
}

func (g *ResGrid) Y(j int) float64 {
	return g.hCount.GridXYZ().Y(j)
}