wehub-resource-sync
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package ui
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import "strings"
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// renderScatter draws a twinkling particle field using Braille dots.
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// Dot density per band is proportional to the squared energy level, with a
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// gravity bias that makes particles denser near the bottom.
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func (v *Visualizer) renderScatter(bands []float64) string {
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height := v.Rows
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dotRows := height * 4
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lines := make([]string, height)
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bandCount := len(bands)
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for row := range height {
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var content strings.Builder
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for b := range bandCount {
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charsPerBand := visBandWidth(bandCount, b)
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for c := range charsPerBand {
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var braille rune = '\u2800'
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for dr := range 4 {
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for dc := range 2 {
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dotRow := row*4 + dr
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dotCol := c*2 + dc
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h := scatterHash(b, dotRow, dotCol, v.frame)
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// Gravity bias: more particles settle near the bottom.
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heightFactor := 0.5 + 0.5*float64(dotRow)/float64(dotRows-1)
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threshold := bands[b] * bands[b] * heightFactor
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if h < threshold {
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braille |= brailleBit[dr][dc]
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}
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}
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}
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content.WriteRune(braille)
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}
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if b < bandCount-1 {
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content.WriteByte(' ')
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}
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}
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lines[row] = specWrap(float64(height-1-row)/float64(height), content.String())
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}
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return strings.Join(lines, "\n")
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}
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