DIvan2000/terminal-oscilloscope
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Match CRT effects to phosphor green palette — remove all cyan

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
rolandnsharp
2026-04-05 20:44:13 +10:00
parent a4f39f8494
commit 5dc759e46a
1 changed files with 8 additions and 8 deletions
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16
src/osc/effects.nim
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@@ -32,7 +32,7 @@ proc elapsedMs(start: Time): int =
int((getTime() - start).inMilliseconds)
proc brightColor(b: float): ForegroundColor =
if b > 0.7: fgWhite elif b > 0.4: fgCyan else: fgGreen
if b > 0.8: fgWhite elif b > 0.4: fgGreen else: fgGreen
proc crtTurnOn*(tb: var TerminalBuffer, w, h: int) =
let start = getTime()
@@ -45,7 +45,7 @@ proc crtTurnOn*(tb: var TerminalBuffer, w, h: int) =
if elapsed < OnFlashMs:
# Phase 1: White flash — high-voltage discharge
let c = if elapsed < OnFlashMs div 2: fgWhite else: fgCyan
let c = if elapsed < OnFlashMs div 2: fgWhite else: fgGreen
for y in 0..<h:
for x in 0..<w:
tb.write(x, y, c, styleReverse, " ")
@@ -55,7 +55,7 @@ proc crtTurnOn*(tb: var TerminalBuffer, w, h: int) =
let count = 8 + (elapsed - OnFlashMs) div 4
for i in 0..<count:
let ch = GlitchChars[rng.rand(GlitchChars.high)]
let color = if rng.rand(2) == 0: fgCyan
let color = if rng.rand(2) == 0: fgGreen
elif rng.rand(2) == 1: fgGreen
else: fgWhite
tb.write(rng.rand(w - 1), rng.rand(h - 1), color, ch)
@@ -64,7 +64,7 @@ proc crtTurnOn*(tb: var TerminalBuffer, w, h: int) =
# Phase 3: Phosphor ramp — screen fills with brightening blocks
let p = (elapsed - OnGlitchMs).float / (OnPhosphorMs - OnGlitchMs).float
let ch = if p < 0.4: "░" elif p < 0.8: "▒" else: "▓"
let color = if p < 0.4: fgGreen elif p < 0.7: fgCyan else: fgWhite
let color = if p < 0.4: fgGreen elif p < 0.7: fgGreen else: fgWhite
for y in 0..<h:
for x in 0..<w:
tb.write(x, y, color, ch)
@@ -76,7 +76,7 @@ proc crtTurnOn*(tb: var TerminalBuffer, w, h: int) =
for x in 0..<w:
let r = lcg(seed)
let ch = NoiseChars[int(r shr 16) mod NoiseChars.len]
let color = [fgGreen, fgCyan, fgWhite, fgCyan][int(r shr 24) mod 4]
let color = [fgGreen, fgGreen, fgWhite, fgGreen][int(r shr 24) mod 4]
tb.write(x, y, color, ch)
elif elapsed < OnBeamMs:
@@ -88,9 +88,9 @@ proc crtTurnOn*(tb: var TerminalBuffer, w, h: int) =
if dist == 0:
for x in 0..<w: tb.write(x, y, fgWhite, styleBright, "━")
elif dist == 1:
for x in 0..<w: tb.write(x, y, fgCyan, "─")
for x in 0..<w: tb.write(x, y, fgGreen, "─")
elif dist <= 3 and y < beamRow:
for x in 0..<w: tb.write(x, y, fgCyan, styleDim, "─")
for x in 0..<w: tb.write(x, y, fgGreen, styleDim, "─")
tb.display()
sleep(16)
@@ -149,7 +149,7 @@ proc crtTurnOff*(tb: var TerminalBuffer, w, h: int) =
# Phase 4: Fade to black
let b = 1.0 - (elapsed - OffDotMs).float / (OffFadeMs - OffDotMs).float
if b > 0.05:
tb.write(cx, cy, (if b > 0.5: fgCyan else: fgGreen), "·")
tb.write(cx, cy, (if b > 0.5: fgGreen else: fgGreen), "·")
tb.display()
sleep(16)