탄막의 인지신경생물학: 광학 흐름 청킹, 2픽셀 피격 판정 중심와 고정 및 미세 안구 도약

// Computational Vision Neuroscience: Bullet Hell Danmaku Cognitive Load Simulator
export interface DanmakuPatternState {
  activeBulletCount: number; // e.g. 50 to 800 bullets on screen
  rotationalSymmetryFold: number; // e.g. 8-fold spiral or 0 (chaotic random)
  negativeSpaceGapWidthPx: number; // width of navigable corridors
  playerHitboxRadiusPx: number; // typically 2 to 3 pixels in Touhou
  gazeStareDurationSeconds: number; // continuous unblinking fixation time
}

export interface CognitiveDanmakuReport {
  effectiveCognitiveChunkCount: number; // compressed items held in working memory
  troxlerBleachingRisk: number; // 0.0 to 1.0 (visual fading probability)
  microsaccadeRefreshEfficiency: number;
  survivalProbabilityPerSecond: number;
  cognitiveProcessingMode: 'INDIVIDUAL_TRACKING_PANIC' | 'GESTALT_FLOW_STATE' | 'HYPER_FIXATED_AUTOMATISM';
}

export class DanmakuCognitionEvaluator {
  public static evaluateVisualProcessing(state: DanmakuPatternState): CognitiveDanmakuReport {
    // Rotational symmetry allows ventral visual cortex to compress bullet clouds
    const symmetryCompression = state.rotationalSymmetryFold > 1 
      ? Math.sqrt(state.rotationalSymmetryFold) * 1.8 
      : 1.0;

    // Effective cognitive chunks processed by dlPFC and V4
    const rawChunks = (state.activeBulletCount / symmetryCompression) * 0.08;
    const effectiveChunks = Math.max(1, Math.min(18, rawChunks));

    // Troxler effect: staring without blinking degrades retinal signal after 3+ seconds
    const bleaching = Math.min(0.9, Math.max(0.05, (state.gazeStareDurationSeconds - 2.5) * 0.18));
    const microsaccadeEfficiency = Math.max(0.2, 1.0 - bleaching * 0.7);

    // Negative space margin ratio
    const clearanceMargin = (state.negativeSpaceGapWidthPx - state.playerHitboxRadiusPx * 2);
    const densityStress = state.activeBulletCount / 400;

    // Survival probability per second
    let survivalRate = 0.99;
    if (clearanceMargin < 4) {
      survivalRate = Math.max(0.1, 0.95 - (4 - clearanceMargin) * 0.22 - densityStress * 0.1);
    } else {
      survivalRate = Math.max(0.5, 0.99 - (densityStress * 0.04));
    }

    let mode: CognitiveDanmakuReport['cognitiveProcessingMode'] = 'GESTALT_FLOW_STATE';
    if (effectiveChunks > 7) {
      mode = 'INDIVIDUAL_TRACKING_PANIC';
    } else if (state.gazeStareDurationSeconds > 6) {
      mode = 'HYPER_FIXATED_AUTOMATISM';
    }

    return {
      effectiveCognitiveChunkCount: parseFloat(effectiveChunks.toFixed(2)),
      troxlerBleachingRisk: parseFloat(bleaching.toFixed(3)),
      microsaccadeRefreshEfficiency: parseFloat(microsaccadeEfficiency.toFixed(3)),
      survivalProbabilityPerSecond: parseFloat(survivalRate.toFixed(4)),
      cognitiveProcessingMode: mode
    };
  }
}