skippyall
91 lines
3.7 KiB
Java
91 lines
3.7 KiB
Java
package io.github.skippyall.minions.fakeplayer;
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import java.util.Optional;
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import java.util.function.Predicate;
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import net.minecraft.world.entity.Entity;
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import net.minecraft.world.level.ClipContext;
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import net.minecraft.world.level.Level;
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import net.minecraft.world.phys.AABB;
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import net.minecraft.world.phys.BlockHitResult;
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import net.minecraft.world.phys.EntityHitResult;
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import net.minecraft.world.phys.HitResult;
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import net.minecraft.world.phys.Vec3;
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public class Tracer
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{
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public static HitResult rayTrace(Entity source, float partialTicks, double reach, boolean fluids)
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{
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BlockHitResult blockHit = rayTraceBlocks(source, partialTicks, reach, fluids);
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double maxSqDist = reach * reach;
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if (blockHit != null)
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{
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maxSqDist = blockHit.getLocation().distanceToSqr(source.getEyePosition(partialTicks));
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}
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EntityHitResult entityHit = rayTraceEntities(source, partialTicks, reach, maxSqDist);
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return entityHit == null ? blockHit : entityHit;
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}
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public static BlockHitResult rayTraceBlocks(Entity source, float partialTicks, double reach, boolean fluids)
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{
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Vec3 pos = source.getEyePosition(partialTicks);
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Vec3 rotation = source.getViewVector(partialTicks);
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Vec3 reachEnd = pos.add(rotation.x * reach, rotation.y * reach, rotation.z * reach);
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return source.level().clip(new ClipContext(pos, reachEnd, ClipContext.Block.OUTLINE, fluids ?
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ClipContext.Fluid.ANY : ClipContext.Fluid.NONE, source));
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}
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public static EntityHitResult rayTraceEntities(Entity source, float partialTicks, double reach, double maxSqDist)
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{
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Vec3 pos = source.getEyePosition(partialTicks);
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Vec3 reachVec = source.getViewVector(partialTicks).scale(reach);
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AABB box = source.getBoundingBox().expandTowards(reachVec).inflate(1);
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return rayTraceEntities(source, pos, pos.add(reachVec), box, e -> !e.isSpectator() && e.isPickable(), maxSqDist);
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}
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public static EntityHitResult rayTraceEntities(Entity source, Vec3 start, Vec3 end, AABB box, Predicate<Entity> predicate, double maxSqDistance)
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{
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Level world = source.level();
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double targetDistance = maxSqDistance;
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Entity target = null;
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Vec3 targetHitPos = null;
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for (Entity current : world.getEntities(source, box, predicate))
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{
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AABB currentBox = current.getBoundingBox().inflate(current.getPickRadius());
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Optional<Vec3> currentHit = currentBox.clip(start, end);
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if (currentBox.contains(start))
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{
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if (targetDistance >= 0)
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{
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target = current;
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targetHitPos = currentHit.orElse(start);
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targetDistance = 0;
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}
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}
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else if (currentHit.isPresent())
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{
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Vec3 currentHitPos = currentHit.get();
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double currentDistance = start.distanceToSqr(currentHitPos);
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if (currentDistance < targetDistance || targetDistance == 0)
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{
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if (current.getRootVehicle() == source.getRootVehicle())
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{
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if (targetDistance == 0)
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{
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target = current;
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targetHitPos = currentHitPos;
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}
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}
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else
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{
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target = current;
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targetHitPos = currentHitPos;
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targetDistance = currentDistance;
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}
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}
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}
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}
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return target == null ? null : new EntityHitResult(target, targetHitPos);
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}
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}
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