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| /** | |
| * lerp — exponential interpolation helper for canvas motion. | |
| * | |
| * Moves a value a fixed fraction of the way toward a target each frame, | |
| * producing smooth ease-out movement between tick snapshots. | |
| * | |
| * Architecture: used by SimCanvas to animate agents and camera. | |
| * | |
| * Design: a pure function with no state; callers hold the current value. | |
| */ | |
| export function lerp(current, target, factor) { | |
| return current + (target - current) * factor; | |
| } | |