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99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
package main
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import (
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"flag"
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"image"
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"image/color"
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"time"
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"github.com/fogleman/gg"
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rgbmatrix "github.com/mcuadros/go-rpi-rgb-led-matrix"
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)
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var (
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rows = flag.Int("led-rows", 32, "number of rows supported")
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cols = flag.Int("led-cols", 32, "number of columns supported")
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parallel = flag.Int("led-parallel", 1, "number of daisy-chained panels")
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chain = flag.Int("led-chain", 2, "number of displays daisy-chained")
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brightness = flag.Int("brightness", 100, "brightness (0-100)")
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hardware_mapping = flag.String("led-gpio-mapping", "regular", "Name of GPIO mapping used.")
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show_refresh = flag.Bool("led-show-refresh", false, "Show refresh rate.")
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inverse_colors = flag.Bool("led-inverse", false, "Switch if your matrix has inverse colors on.")
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disable_hardware_pulsing = flag.Bool("led-no-hardware-pulse", false, "Don't use hardware pin-pulse generation.")
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)
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func main() {
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config := &rgbmatrix.DefaultConfig
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config.Rows = *rows
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config.Cols = *cols
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config.Parallel = *parallel
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config.ChainLength = *chain
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config.Brightness = *brightness
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config.HardwareMapping = *hardware_mapping
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config.ShowRefreshRate = *show_refresh
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config.InverseColors = *inverse_colors
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config.DisableHardwarePulsing = *disable_hardware_pulsing
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m, err := rgbmatrix.NewRGBLedMatrix(config)
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fatal(err)
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tk := rgbmatrix.NewToolKit(m)
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defer tk.Close()
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tk.PlayAnimation(NewAnimation(image.Point{64, 32}))
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}
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func init() {
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flag.Parse()
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}
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func fatal(err error) {
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if err != nil {
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panic(err)
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}
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}
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type Animation struct {
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ctx *gg.Context
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position image.Point
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dir image.Point
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stroke int
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}
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func NewAnimation(sz image.Point) *Animation {
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return &Animation{
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ctx: gg.NewContext(sz.X, sz.Y),
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dir: image.Point{1, 1},
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stroke: 5,
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}
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}
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func (a *Animation) Next() (image.Image, <-chan time.Time, error) {
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defer a.updatePosition()
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a.ctx.SetColor(color.Black)
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a.ctx.Clear()
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a.ctx.DrawCircle(float64(a.position.X), float64(a.position.Y), float64(a.stroke))
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a.ctx.SetColor(color.RGBA{255, 0, 0, 255})
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a.ctx.Fill()
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return a.ctx.Image(), time.After(time.Millisecond * 50), nil
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}
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func (a *Animation) updatePosition() {
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a.position.X += 1 * a.dir.X
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a.position.Y += 1 * a.dir.Y
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if a.position.Y+a.stroke > a.ctx.Height() {
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a.dir.Y = -1
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} else if a.position.Y-a.stroke < 0 {
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a.dir.Y = 1
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}
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if a.position.X+a.stroke > a.ctx.Width() {
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a.dir.X = -1
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} else if a.position.X-a.stroke < 0 {
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a.dir.X = 1
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}
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}
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