Advanced AI Prompt for Three.js Starfield with Warp Speed Effect

Act as a Space Simulation WebGL Engineer. Architect a highly immersive Three.js starfield hero background that programmatically transitions into a cinematic 'warp speed' effect based on user interaction (e.g., scroll or click). Normally, [STAR_COUNT] particles must drift slowly along the Z-axis. When the trigger is activated, exponentially multiply the velocity by [WARP_FACTOR] and physically stretch the geometry scale along the Z-axis relative to the [STREAK_LENGTH] to simulate motion blur. Integrate the `UnrealBloomPass` post-processing effect with a strict [BLOOM_THRESHOLD] to give the elongated stars a blinding, high-end sci-fi glow. Provide the exact shader uniform mathematics required to avoid CPU bottlenecks during the velocity transition.