mrcharles
10e930e46d
Go CLI that turns the markdown currency of this stack (Redmine notes, Discourse posts, briefing output) into typeset PDFs: two embedded typst templates (report with title page/TOC/headers, dense brief), front-matter (title/subtitle/author/date/classification/template), GFM tables, and bar charts rendered in pure Go (go-chart) from fenced chart data blocks. Engine is a prebuilt typst 0.15.1 container pinned by digest and run --network none; PDF bytes to stdout or -o. Exit codes 0/1/2. All dev in docker (dev.sh/Makefile); unit tests + golden typst fixtures plus a host-side smoke against the real engine container. Generated with Crush Assisted-by: Crush:glm-5.2
34 lines
754 B
Go
34 lines
754 B
Go
package chart
|
|
|
|
import "github.com/wcharczuk/go-chart/v2/drawing"
|
|
|
|
// Jet is a color map provider based on matlab's jet color map.
|
|
func Jet(v, vmin, vmax float64) drawing.Color {
|
|
c := drawing.Color{R: 0xff, G: 0xff, B: 0xff, A: 0xff} // white
|
|
var dv float64
|
|
|
|
if v < vmin {
|
|
v = vmin
|
|
}
|
|
if v > vmax {
|
|
v = vmax
|
|
}
|
|
dv = vmax - vmin
|
|
|
|
if v < (vmin + 0.25*dv) {
|
|
c.R = 0
|
|
c.G = drawing.ColorChannelFromFloat(4 * (v - vmin) / dv)
|
|
} else if v < (vmin + 0.5*dv) {
|
|
c.R = 0
|
|
c.B = drawing.ColorChannelFromFloat(1 + 4*(vmin+0.25*dv-v)/dv)
|
|
} else if v < (vmin + 0.75*dv) {
|
|
c.R = drawing.ColorChannelFromFloat(4 * (v - vmin - 0.5*dv) / dv)
|
|
c.B = 0
|
|
} else {
|
|
c.G = drawing.ColorChannelFromFloat(1 + 4*(vmin+0.75*dv-v)/dv)
|
|
c.B = 0
|
|
}
|
|
|
|
return c
|
|
}
|