lots of code

2024-04-13 22:04:49 +02:00
commit 60fd7f0891
71 changed files with 3667 additions and 0 deletions
@@ -0,0 +1,90 @@
+package io.github.skippyall.minions.fakeplayer;
+
+import java.util.Optional;
+import java.util.function.Predicate;
+
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.ClipContext;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.phys.AABB;
+import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.EntityHitResult;
+import net.minecraft.world.phys.HitResult;
+import net.minecraft.world.phys.Vec3;
+
+public class Tracer
+{
+    public static HitResult rayTrace(Entity source, float partialTicks, double reach, boolean fluids)
+    {
+        BlockHitResult blockHit = rayTraceBlocks(source, partialTicks, reach, fluids);
+        double maxSqDist = reach * reach;
+        if (blockHit != null)
+        {
+            maxSqDist = blockHit.getLocation().distanceToSqr(source.getEyePosition(partialTicks));
+        }
+        EntityHitResult entityHit = rayTraceEntities(source, partialTicks, reach, maxSqDist);
+        return entityHit == null ? blockHit : entityHit;
+    }
+
+    public static BlockHitResult rayTraceBlocks(Entity source, float partialTicks, double reach, boolean fluids)
+    {
+        Vec3 pos = source.getEyePosition(partialTicks);
+        Vec3 rotation = source.getViewVector(partialTicks);
+        Vec3 reachEnd = pos.add(rotation.x * reach, rotation.y * reach, rotation.z * reach);
+        return source.level().clip(new ClipContext(pos, reachEnd, ClipContext.Block.OUTLINE, fluids ?
+                ClipContext.Fluid.ANY : ClipContext.Fluid.NONE, source));
+    }
+
+    public static EntityHitResult rayTraceEntities(Entity source, float partialTicks, double reach, double maxSqDist)
+    {
+        Vec3 pos = source.getEyePosition(partialTicks);
+        Vec3 reachVec = source.getViewVector(partialTicks).scale(reach);
+        AABB box = source.getBoundingBox().expandTowards(reachVec).inflate(1);
+        return rayTraceEntities(source, pos, pos.add(reachVec), box, e -> !e.isSpectator() && e.isPickable(), maxSqDist);
+    }
+
+    public static EntityHitResult rayTraceEntities(Entity source, Vec3 start, Vec3 end, AABB box, Predicate<Entity> predicate, double maxSqDistance)
+    {
+        Level world = source.level();
+        double targetDistance = maxSqDistance;
+        Entity target = null;
+        Vec3 targetHitPos = null;
+        for (Entity current : world.getEntities(source, box, predicate))
+        {
+            AABB currentBox = current.getBoundingBox().inflate(current.getPickRadius());
+            Optional<Vec3> currentHit = currentBox.clip(start, end);
+            if (currentBox.contains(start))
+            {
+                if (targetDistance >= 0)
+                {
+                    target = current;
+                    targetHitPos = currentHit.orElse(start);
+                    targetDistance = 0;
+                }
+            }
+            else if (currentHit.isPresent())
+            {
+                Vec3 currentHitPos = currentHit.get();
+                double currentDistance = start.distanceToSqr(currentHitPos);
+                if (currentDistance < targetDistance || targetDistance == 0)
+                {
+                    if (current.getRootVehicle() == source.getRootVehicle())
+                    {
+                        if (targetDistance == 0)
+                        {
+                            target = current;
+                            targetHitPos = currentHitPos;
+                        }
+                    }
+                    else
+                    {
+                        target = current;
+                        targetHitPos = currentHitPos;
+                        targetDistance = currentDistance;
+                    }
+                }
+            }
+        }
+        return target == null ? null : new EntityHitResult(target, targetHitPos);
+    }
+}