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package main
import (
"fmt"
"image/color"
"github.com/martinlehoux/biking_home/mountain_pass"
"github.com/martinlehoux/biking_home/ride"
"github.com/martinlehoux/kagamigo/kcore"
"gonum.org/v1/plot"
"gonum.org/v1/plot/plotter"
"gonum.org/v1/plot/vg"
)
func renderChart(r ride.Ride, climbs []ride.Climb, crossings []mountain_pass.Crossing, output string) {
p := plot.New()
p.Title.Text = "Ride profile"
p.X.Label.Text = "Distance (km)"
p.Y.Label.Text = "Elevation (m)"
maxElev := 0.0
elevation := make(plotter.XYs, len(r.Points()))
for i, point := range r.Points() {
elevation[i].X = point.DistanceM / 1000
elevation[i].Y = point.ElevationM
if point.ElevationM > maxElev {
maxElev = point.ElevationM
}
}
for _, climb := range climbs {
x0 := climb.Start().DistanceM / 1000
x1 := climb.End().DistanceM / 1000
fill, err := plotter.NewPolygon(plotter.XYs{
{X: x0, Y: 0},
{X: x1, Y: 0},
{X: x1, Y: maxElev},
{X: x0, Y: maxElev},
})
kcore.Expect(err, "failed to create climb band")
fill.Color = color.RGBA{R: 230, G: 160, B: 0, A: 70}
fill.LineStyle.Width = 0
p.Add(fill)
p.Add(plotLabels(plotter.XY{X: (x0 + x1) / 2, Y: climb.Top().ElevationM * 1.01}, climbLabel(climb)))
}
for _, crossing := range crossings {
x := crossing.RideDistanceM / 1000
line, err := plotter.NewLine(plotter.XYs{
{X: x, Y: 0},
{X: x, Y: maxElev},
})
kcore.Expect(err, "failed to create pass marker")
line.LineStyle.Dashes = []vg.Length{vg.Points(4), vg.Points(2)}
p.Add(line)
p.Add(plotLabels(plotter.XY{X: x, Y: maxElev * 0.96},
fmt.Sprintf("%s %dm", crossing.Pass.Name, crossing.Pass.Elevation)))
}
elevLine, err := plotter.NewLine(elevation)
kcore.Expect(err, "failed to create elevation line")
p.Add(elevLine)
kcore.Expect(p.Save(10*vg.Inch, 4*vg.Inch, output), "failed to save chart")
}
func climbLabel(climb ride.Climb) string {
if climb.Name != "" {
return climb.Name
}
return fmt.Sprintf("%s %d", ride.Category(climb.Score()), int(climb.Score()))
}
func plotLabels(xy plotter.XY, label string) *plotter.Labels {
labels, err := plotter.NewLabels(plotter.XYLabels{
XYs: plotter.XYs{xy},
Labels: []string{label},
})
kcore.Expect(err, "failed to create labels")
return labels
}
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