Minecraft End Portal Finder - Locate Strongholds

Eyes of ender always fly toward the nearest stronghold's portal room, which makes locating the portal a geometry problem: every throw defines a ray from your position along your viewing direction, and two rays from different positions intersect at the target. This calculator does that intersection exactly, using the yaw angle straight from the F3 debug screen (in Minecraft's convention, yaw 0 faces south, -90 faces east, ±180 faces north, 90 faces west). The technique in practice: stand still, throw an eye, and while it hovers put your crosshair on it and read the first "Facing" number. Then run a few hundred blocks sideways — perpendicular to the eye's flight, not along it — and repeat. Enter both positions and both yaws; the intersection of the two rays is the stronghold, shown as coordinates, as a distance, and on a top-down map with north up. Accuracy depends on the angle between the rays. If you only move a short distance sideways, the rays cross at a shallow angle and a tenth-of-a-degree yaw reading error can move the intersection by many blocks — the calculator warns when the crossing angle is below 15 degrees. With a few hundred blocks of separation, the fix usually lands within a couple of chunks of the portal room's staircase, close enough to dig down and search. The Nether coordinate tile divides by eight so you can travel most of the distance through the Nether: build a portal near those coordinates and you will emerge close to the stronghold. Remember that strongholds generate in rings around the origin (the first ring roughly 1,300–2,800 blocks out), so a fix wildly outside that range usually means a yaw sign error — the calculator flags rays that intersect behind you for the same reason.