MindMachine: improve contrast and fix visual flash/pulse rendering

2026-03-10 23:14:33 -05:00
parent d4990af092
commit fdf3bf01d3
3 changed files with 223 additions and 46 deletions
--- a/app/src/main/java/com/mindmachine/mvp/session/VisualSignal.kt
+++ b/app/src/main/java/com/mindmachine/mvp/session/VisualSignal.kt
@@ -0,0 +1,30 @@
+package com.mindmachine.mvp.session
+
+import com.mindmachine.mvp.domain.VisualPattern
+import kotlin.math.PI
+import kotlin.math.sin
+
+fun computeVisualAlpha(
+    visualPattern: VisualPattern,
+    frameTimeNanos: Long,
+    blinkFrequencyHz: Float,
+    intensityPercent: Int,
+): Float {
+    val intensity = (intensityPercent.coerceIn(0, 100) / 100f)
+    if (intensity <= 0f) return 0f
+
+    val frequency = blinkFrequencyHz.coerceIn(1f, 20f).toDouble()
+    val timeSeconds = frameTimeNanos / 1_000_000_000.0
+
+    return when (visualPattern) {
+        VisualPattern.FLASH -> {
+            val phase = (timeSeconds * frequency) % 1.0
+            if (phase < 0.5) intensity else 0f
+        }
+
+        VisualPattern.PULSE -> {
+            val pulse = ((sin(2.0 * PI * frequency * timeSeconds) + 1.0) / 2.0).toFloat()
+            (intensity * pulse).coerceIn(0f, intensity)
+        }
+    }
+}