Slightly clean up flight and dimensions predicates

src/main/java/com/minelittlepony/unicopia/FlightType.java

@@ -1,11 +1,10 @@
 package com.minelittlepony.unicopia;
 
-import com.minelittlepony.unicopia.entity.player.Pony;
-
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.sound.SoundEvent;
 
 public enum FlightType {
+    UNSET,
     NONE,
     AVIAN,
     INSECTOID,
@@ -23,6 +22,10 @@ public enum FlightType {
         return this == ARTIFICIAL;
     }
 
+    public boolean isPresent() {
+        return this != UNSET;
+    }
+
     public boolean canFly() {
         return !isGrounded();
     }
@@ -41,6 +44,6 @@ public enum FlightType {
      * This overrides what the race specifies.
      */
     public interface Provider {
-        FlightType getFlightType(Pony player);
+        FlightType getFlightType();
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/DisguiseSpell.java

@@ -205,21 +205,22 @@ public class DisguiseSpell extends AbstractSpell implements Suppressable, Flight
     }
 
     @Override
-    public FlightType getFlightType(Pony player) {
-        if (isSuppressed() || !disguise.isPresent()) {
-            return player.getSpecies().getFlightType();
-        }
-        return disguise.getFlightType();
+    public FlightType getFlightType() {
+        return getAppearance().map(Disguise::getFlightType).orElse(FlightType.UNSET);
+    }
+
+    public Optional<Disguise> getAppearance() {
+        return isSuppressed() ? Optional.empty() : Optional.ofNullable(disguise);
     }
 
     @Override
     public Optional<Float> getTargetEyeHeight(Pony player) {
-        return isSuppressed() ? Optional.empty() : disguise.getStandingEyeHeight();
+        return getAppearance().flatMap(d -> d.getTargetEyeHeight(player));
     }
 
     @Override
     public Optional<EntityDimensions> getTargetDimensions(Pony player) {
-        return isSuppressed() ? Optional.empty() : disguise.getDimensions();
+        return getAppearance().flatMap(d -> d.getTargetDimensions(player));
     }
 
     static abstract class PlayerAccess extends PlayerEntity {

src/main/java/com/minelittlepony/unicopia/entity/behaviour/Disguise.java

@@ -17,6 +17,7 @@ import com.minelittlepony.unicopia.Owned;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.entity.player.PlayerAttributes;
+import com.minelittlepony.unicopia.entity.player.PlayerDimensions;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.projectile.ProjectileUtil;
 import com.minelittlepony.unicopia.util.NbtSerialisable;
@@ -49,7 +50,7 @@ import net.minecraft.util.shape.VoxelShape;
 import net.minecraft.util.shape.VoxelShapes;
 import net.minecraft.world.WorldAccess;
 
-public class Disguise implements NbtSerialisable {
+public class Disguise implements NbtSerialisable, PlayerDimensions.Provider, FlightType.Provider {
     private static final Optional<Float> BLOCK_HEIGHT = Optional.of(0.5F);
 
     @NotNull
@@ -206,7 +207,12 @@ public class Disguise implements NbtSerialisable {
         }
     }
 
+    @Override
     public FlightType getFlightType() {
+        if (!isPresent()) {
+            return FlightType.UNSET;
+        }
+
         if (entity == null) {
             return FlightType.NONE;
         }
@@ -231,7 +237,8 @@ public class Disguise implements NbtSerialisable {
         return FlightType.NONE;
     }
 
-    public Optional<Float> getStandingEyeHeight() {
+    @Override
+    public Optional<Float> getTargetEyeHeight(Pony player) {
         if (entity != null) {
             if (entity instanceof FallingBlockEntity) {
                 return BLOCK_HEIGHT;
@@ -255,7 +262,8 @@ public class Disguise implements NbtSerialisable {
         return EntityBehaviour.forEntity(entity).getCameraDistance(entity, player);
     }
 
-    public Optional<EntityDimensions> getDimensions() {
+    @Override
+    public Optional<EntityDimensions> getTargetDimensions(Pony player) {
         return dimensions = EntityBehaviour.forEntity(entity).getDimensions(entity, dimensions);
     }
 

src/main/java/com/minelittlepony/unicopia/entity/player/PlayerPhysics.java

@@ -134,7 +134,8 @@ public class PlayerPhysics extends EntityPhysics<PlayerEntity> implements Tickab
 
         return pony.getSpellSlot().get(true)
             .filter(effect -> !effect.isDead() && effect instanceof FlightType.Provider)
-            .map(effect -> ((FlightType.Provider)effect).getFlightType(pony))
+            .map(effect -> ((FlightType.Provider)effect).getFlightType())
+            .filter(FlightType::isPresent)
             .orElse(pony.getSpecies().getFlightType());
     }