[1.14.4+ Fix] Entity collision box

src/main/java/cam72cam/mod/entity/boundingbox/BBVoxelShape.java

@@ -0,0 +1,95 @@
+package cam72cam.mod.entity.boundingbox;
+
+import it.unimi.dsi.fastutil.doubles.DoubleArrayList;
+import it.unimi.dsi.fastutil.doubles.DoubleList;
+import net.minecraft.util.AxisRotation;
+import net.minecraft.util.Direction;
+import net.minecraft.util.Util;
+import net.minecraft.util.math.AxisAlignedBB;
+import net.minecraft.util.math.shapes.BitSetVoxelShapePart;
+import net.minecraft.util.math.shapes.VoxelShape;
+import net.minecraft.util.math.shapes.VoxelShapeCube;
+import net.minecraft.util.math.shapes.VoxelShapePart;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class BBVoxelShape extends VoxelShape {
+    //Though I don't understand what doe this mean...
+    private static final VoxelShape FULL_CUBE1 = Util.make(() -> {
+        VoxelShapePart lvt_0_1_ = new BitSetVoxelShapePart(200, 200, 200, -100, -100, -100, 99, 99, 99);
+        for (int i = -100; i <= 99; i++) {
+            for (int i1 = -100; i1 <= 99; i1++) {
+                for (int i2 = -100; i2 <= 99; i2++) {
+                    lvt_0_1_.setFilled(1, i1, i2, false, true);
+                }
+            }
+        }
+        return new VoxelShapeCube(lvt_0_1_);
+    });
+
+    private BoundingBox bb;
+
+    public BBVoxelShape(BoundingBox boundingBox) {
+        super(FULL_CUBE1.part);
+        this.bb = boundingBox;
+    }
+
+    @Override
+    public AxisAlignedBB getBoundingBox() {
+        return this.bb;
+    }
+
+    @Override
+    public List<AxisAlignedBB> toBoundingBoxList() {
+        return Collections.singletonList(bb);
+    }
+
+    @Override
+    protected boolean contains(double p_211542_1_, double p_211542_3_, double p_211542_5_) {
+        return bb.contains(p_211542_1_, p_211542_3_, p_211542_5_);
+    }
+
+    @Override
+    protected double getAllowedOffset(AxisRotation movementAxis, AxisAlignedBB collisionBox, double desiredOffset) {
+        if (this.isEmpty()) {
+            return desiredOffset;
+        } else if (Math.abs(desiredOffset) < 1.0E-7D) {
+            return 0.0D;
+        } else {
+            boolean colliding = bb.intersects(collisionBox.minX, collisionBox.minY, collisionBox.minZ, collisionBox.maxX, collisionBox.maxY, collisionBox.maxZ);
+            boolean willZCollide = !colliding
+                    && bb.intersects(collisionBox.minX, collisionBox.minY, collisionBox.minZ + desiredOffset, collisionBox.maxX, collisionBox.maxY, collisionBox.maxZ + desiredOffset);
+            boolean willXCollide = !colliding
+                    && bb.intersects(collisionBox.minX + desiredOffset, collisionBox.minY, collisionBox.minZ, collisionBox.maxX + desiredOffset, collisionBox.maxY, collisionBox.maxZ);
+            switch (movementAxis) {
+                case FORWARD: //Z
+                case NONE: //X
+                    if (willXCollide || willZCollide) {
+                        return 0;
+                    } else {
+                        return desiredOffset;
+                    }
+                case BACKWARD: //Y
+                default:
+                    //Add a small offset so jump won't get blocked
+                    return bb.internal.calculateYOffset(IBoundingBox.from(collisionBox), desiredOffset) + 0.01;
+            }
+        }
+    }
+
+    @Override
+    protected DoubleList getValues(Direction.Axis axis) {
+        switch(axis) {
+            case X:
+                return DoubleArrayList.wrap(Arrays.copyOf(new double[]{bb.minX, bb.maxX}, part.getXSize() + 1));
+            case Y:
+                return DoubleArrayList.wrap(Arrays.copyOf(new double[]{bb.minY, bb.maxY}, part.getYSize() + 1));
+            case Z:
+                return DoubleArrayList.wrap(Arrays.copyOf(new double[]{bb.minZ, bb.maxZ}, part.getZSize() + 1));
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+}

src/main/java/cam72cam/mod/mixin/fix/collision/MixinVoxelShapes.java

@@ -0,0 +1,26 @@
+package cam72cam.mod.mixin.fix.collision;
+
+import cam72cam.mod.entity.boundingbox.BBVoxelShape;
+import cam72cam.mod.entity.boundingbox.BoundingBox;
+import net.minecraft.util.Direction;
+import net.minecraft.util.Util;
+import net.minecraft.util.math.AxisAlignedBB;
+import net.minecraft.util.math.shapes.*;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(VoxelShapes.class)
+public class MixinVoxelShapes {
+    @Inject(method = "create(Lnet/minecraft/util/math/AxisAlignedBB;)Lnet/minecraft/util/math/shapes/VoxelShape;",
+            at = @At("HEAD"), cancellable = true)
+    private static void inj(AxisAlignedBB aabb, CallbackInfoReturnable<VoxelShape> cir) {
+        if (aabb instanceof BoundingBox) {
+            cir.setReturnValue(new BBVoxelShape((BoundingBox) aabb));
+            cir.cancel();
+        }
+    }
+}

src/main/resources/META-INF/accesstransformer.cfg

@@ -15,4 +15,7 @@ public net.minecraft.resources.FolderPack func_195768_c(Ljava/lang/String;)Z # n
 public net.minecraft.resources.FolderPack func_195766_a(Ljava/lang/String;)Ljava/io/InputStream; # net/minecraft/resources/ResourcePack/getInputStream (Ljava/lang/String;)Ljava/io/InputStream;
 public net.minecraft.world.server.ChunkManager func_223491_f()Ljava/lang/Iterable; # net/minecraft/world/server/ChunkManager/getLoadedChunksIterable ()Ljava/lang/Iterable;
 public net.minecraft.client.world.ClientWorld field_73035_a #connection
-public net.minecraft.client.gui.widget.button.CheckboxButton field_212943_a # checked
+public net.minecraft.client.gui.widget.button.CheckboxButton field_212943_a # checked
+public net.minecraft.util.math.shapes.VoxelShape <init>(Lnet/minecraft/util/math/shapes/VoxelShapePart;)V
+public net.minecraft.util.math.shapes.VoxelShape field_197768_g # part
+public net.minecraft.util.math.shapes.VoxelShapeCube <init>(Lnet/minecraft/util/math/shapes/VoxelShapePart;)V

src/main/resources/mixins.fix.universalmodcore.json

@@ -7,6 +7,7 @@
   "compatibilityLevel": "JAVA_8",
   "mixinPriority": 1301,
   "mixins": [
+    "collision.MixinVoxelShapes"
   ],
   "client": [
   ]