REntity #148
@ -19,10 +19,15 @@
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package de.steamwar.bausystem.utils;
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import de.steamwar.entity.REntity;
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import de.steamwar.entity.RFallingBlockEntity;
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import lombok.Data;
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import lombok.experimental.UtilityClass;
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import org.bukkit.FluidCollisionMode;
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import org.bukkit.GameMode;
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import org.bukkit.Location;
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import org.bukkit.block.Block;
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import org.bukkit.block.BlockFace;
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import org.bukkit.entity.Entity;
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import org.bukkit.entity.Player;
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import org.bukkit.util.BoundingBox;
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@ -72,6 +77,53 @@ public class RayTraceUtils {
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}
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}
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public static RRayTraceResult traceREntity(Player player, Location to, List<RFallingBlockEntity> entityList) {
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if (player.getGameMode() == GameMode.SPECTATOR) {
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return null;
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}
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Location startPos = to.clone().add(0.0, player.getEyeHeight(), 0.0);
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Vector direction = to.getDirection();
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RayTraceResult blocks = player.getWorld().rayTraceBlocks(startPos, direction, 10.0, FluidCollisionMode.NEVER, true);
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REntity nearestHitEntity = null;
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RRayTraceResult nearestHitResult = null;
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double nearestDistanceSq = Double.MAX_VALUE;
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for (REntity entity: entityList) {
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if (!isOccluded(startPos.toVector(), direction, new Vector(entity.getX(), entity.getY() + 0.5, entity.getZ()))) continue;
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double distanceSq = new Vector(entity.getX(), entity.getY() + 0.5, entity.getZ()).distanceSquared(startPos.toVector());
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if (distanceSq < nearestDistanceSq) {
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nearestHitEntity = entity;
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nearestHitResult = new RRayTraceResult(new Vector(entity.getX(), entity.getY() + 0.5, entity.getZ()), null, null, entity);
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nearestDistanceSq = distanceSq;
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}
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}
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RRayTraceResult entities = nearestHitEntity == null ? null : new RRayTraceResult(nearestHitResult.getHitPosition(), nearestHitResult.getHitBlock(), nearestHitResult.getHitBlockFace(), nearestHitEntity);
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if (blocks == null) {
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return entities;
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} else if (entities == null) {
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return RRayTraceResult.fromRayTraceResult(blocks);
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} else {
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Vector startVec = startPos.toVector();
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double blockHitDistance = startVec.distance(blocks.getHitPosition());
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double entityHitDistanceSquared = startVec.distanceSquared(entities.getHitPosition());
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return entityHitDistanceSquared < blockHitDistance * blockHitDistance ? entities : RRayTraceResult.fromRayTraceResult(blocks);
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}
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}
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@Data
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public static class RRayTraceResult {
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private final Vector hitPosition;
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private final Block hitBlock;
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private final BlockFace hitBlockFace;
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private final REntity hitEntity;
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public static RRayTraceResult fromRayTraceResult(RayTraceResult rayTraceResult) {
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return new RRayTraceResult(rayTraceResult.getHitPosition(), rayTraceResult.getHitBlock(), rayTraceResult.getHitBlockFace(), null);
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}
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}
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public static boolean isOccluded(Vector a, Vector n, Vector b) {
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// a = Head pos, n = View direction (normalized), b = entity center
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// https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line#Vector_formulation
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