Release God's Eye View as open source

src/cockpitVisionPolicy.js

@@ -0,0 +1,44 @@
+export const COCKPIT_VISION_MODES = Object.freeze(['optical', 'crt', 'nvg', 'thermal', 'noir']);
+
+const TARGET_STYLE_BY_MODE = Object.freeze({
+  crt: 'retro',
+  nvg: 'surveillance',
+  thermal: 'thermal',
+  noir: 'noir',
+});
+
+/** Normalize a requested Cockpit vision mode to the inherited preset entry. */
+export function normalizeCockpitVisionMode(mode) {
+  return COCKPIT_VISION_MODES.includes(mode) ? mode : 'optical';
+}
+
+/** Settle pending map-style crossfades and return their intended final intensities. */
+export function captureCockpitVisionBaseline(stages, transitions) {
+  const baseline = {};
+  for (const [name, stage] of Object.entries(stages)) {
+    const intensity = transitions?.get(name)?.to ?? stage.uniforms.intensity;
+    stage.uniforms.intensity = intensity;
+    transitions?.delete(name);
+    baseline[name] = intensity;
+  }
+  return baseline;
+}
+
+/**
+ * Apply Cockpit-only stage intensities without changing any shader parameters.
+ * Returns the temporary style whose parameters should be shown, or null.
+ */
+export function applyCockpitVisionStageIntensities(stages, mode, restore = {}) {
+  const next = normalizeCockpitVisionMode(mode);
+  if (next === 'optical') {
+    for (const [name, intensity] of Object.entries(restore)) {
+      if (stages[name]) stages[name].uniforms.intensity = intensity;
+    }
+    return null;
+  }
+
+  for (const stage of Object.values(stages)) stage.uniforms.intensity = 0;
+  const target = TARGET_STYLE_BY_MODE[next] || null;
+  if (target && stages[target]) stages[target].uniforms.intensity = 1;
+  return target;
+}