Fixed interpolators not being unique per entity/player

src/main/java/com/minelittlepony/model/AbstractPonyModel.java

@@ -25,6 +25,7 @@ import net.minecraft.util.EnumHandSide;
 import net.minecraft.util.math.MathHelper;
 
 import java.util.Random;
+import java.util.UUID;
 
 import static net.minecraft.client.renderer.GlStateManager.*;
 
@@ -63,6 +64,8 @@ public abstract class AbstractPonyModel extends ModelPlayer implements IModel, P
     public IModelPart tail;
     public PonySnout snout;
 
+    public UUID interpolatorId;
+
     public AbstractPonyModel(boolean arms) {
         super(0, arms);
     }
@@ -93,6 +96,7 @@ public abstract class AbstractPonyModel extends ModelPlayer implements IModel, P
         isSwimming = pony.isSwimming(entity);
         headGear = pony.isWearingHeadgear(entity);
         isRidingInteractive = pony.isRidingInteractive(entity);
+        interpolatorId = entity.getUniqueID();
     }
 
     /**
@@ -243,7 +247,7 @@ public abstract class AbstractPonyModel extends ModelPlayer implements IModel, P
      * @param ticks       Total whole and partial ticks since the entity's existance. Used in animations together with {@code swing} and {@code move}.
      */
     protected void shakeBody(float move, float swing, float bodySwing, float ticks) {
-        tail.setRotationAndAngles(isSwimming() || rainboom, move, swing, bodySwing * 5, ticks);
+        tail.setRotationAndAngles(isSwimming() || rainboom, interpolatorId, move, swing, bodySwing * 5, ticks);
 
         upperTorso.rotateAngleY = bodySwing;
         bipedBody.rotateAngleY = bodySwing;
@@ -308,7 +312,7 @@ public abstract class AbstractPonyModel extends ModelPlayer implements IModel, P
 
         float legRPX = cos - getLegOutset() - 0.001F;
 
-        legRPX = metadata.getInterpolator().interpolate("legOffset", legRPX, 3);
+        legRPX = metadata.getInterpolator(entity.getUniqueID()).interpolate("legOffset", legRPX, 3);
 
         bipedRightArm.rotationPointX = -legRPX;
         bipedRightLeg.rotationPointX = -legRPX;
@@ -881,7 +885,7 @@ public abstract class AbstractPonyModel extends ModelPlayer implements IModel, P
         }
         upperTorso.render(scale);
         bipedBody.postRender(scale);
-        tail.renderPart(scale);
+        tail.renderPart(scale, entity.getUniqueID());
     }
 
     protected void renderLegs(float scale) {

src/main/java/com/minelittlepony/model/anim/BasicEasingInterpolator.java

@@ -1,9 +1,30 @@
 package com.minelittlepony.model.anim;
 
+import com.minelittlepony.util.chron.ChronicCache;
+import com.minelittlepony.util.chron.Touchable;
+
 import java.util.HashMap;
 import java.util.Map;
+import java.util.UUID;
 
-public class BasicEasingInterpolator implements IInterpolator {
+public class BasicEasingInterpolator extends Touchable<BasicEasingInterpolator> implements IInterpolator {
+
+    private static ChronicCache<UUID, BasicEasingInterpolator> instanceCache = new ChronicCache<>();
+
+    /**
+     * Gets or creates a new basic, linear interpolator for the provided id.
+     */
+    public static IInterpolator getInstance(UUID id) {
+        return instanceCache.retrieve(id, BasicEasingInterpolator::new);
+    }
+
+    public BasicEasingInterpolator() {
+
+    }
+
+    private BasicEasingInterpolator(UUID id) {
+
+    }
 
     private final Map<String, Float> properties = new HashMap<String, Float>();
 

src/main/java/com/minelittlepony/model/capabilities/IModelPart.java

@@ -1,5 +1,7 @@
 package com.minelittlepony.model.capabilities;
 
+import java.util.UUID;
+
 public interface IModelPart {
     /**
      * Initialises all of the boxes in this modelpart.
@@ -15,14 +17,14 @@ public interface IModelPart {
      *
      * See {@link AbstractPonyMode.setRotationAndAngle} for an explanation of the various parameters.
      */
-    default void setRotationAndAngles(boolean rainboom, float move, float swing, float bodySwing, float ticks) {
+    default void setRotationAndAngles(boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
 
     }
 
     /**
      * Renders this model component.
      */
-    void renderPart(float scale);
+    void renderPart(float scale, UUID interpolatorId);
 
     /**
      * Sets whether this part should be rendered.

src/main/java/com/minelittlepony/model/components/BatWings.java

@@ -5,6 +5,8 @@ import net.minecraft.client.renderer.GlStateManager;
 import com.minelittlepony.model.AbstractPonyModel;
 import com.minelittlepony.model.capabilities.IModelPegasus;
 
+import java.util.UUID;
+
 public class BatWings<T extends AbstractPonyModel & IModelPegasus> extends PegasusWings<T> {
 
     public BatWings(T model, float yOffset, float stretch) {
@@ -23,12 +25,12 @@ public class BatWings<T extends AbstractPonyModel & IModelPegasus> extends Pegas
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
 
         GlStateManager.pushMatrix();
         GlStateManager.scale(1.3F, 1.3F, 1.3F);
 
-        super.renderPart(scale);
+        super.renderPart(scale, interpolatorId);
 
         GlStateManager.popMatrix();
     }

src/main/java/com/minelittlepony/model/components/ModelPonyHead.java

@@ -55,7 +55,7 @@ public class ModelPonyHead extends ModelHumanoidHead implements ICapitated {
 
         if (metadata.hasMagic()) {
             skeletonHead.postRender(scale);
-            horn.renderPart(scale);
+            horn.renderPart(scale, entity.getUniqueID());
         }
     }
 

src/main/java/com/minelittlepony/model/components/PegasusWings.java

@@ -9,6 +9,8 @@ import com.minelittlepony.model.capabilities.IModelPart;
 import com.minelittlepony.model.capabilities.IModelPegasus;
 import com.minelittlepony.pony.data.PonyWearable;
 
+import java.util.UUID;
+
 public class PegasusWings<T extends AbstractPonyModel & IModelPegasus> implements IModelPart {
 
     protected final T pegasus;
@@ -41,7 +43,7 @@ public class PegasusWings<T extends AbstractPonyModel & IModelPegasus> implement
     }
 
     @Override
-    public void setRotationAndAngles(boolean rainboom, float move, float swing, float bodySwing, float ticks) {
+    public void setRotationAndAngles(boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
         float flap = 0;
         float progress = pegasus.getSwingAmount();
 
@@ -69,7 +71,7 @@ public class PegasusWings<T extends AbstractPonyModel & IModelPegasus> implement
         }
 
         if (!pegasus.isFlying()) {
-            flapAngle = pegasus.getMetadata().getInterpolator().interpolate("wingFlap", flapAngle, 10);
+            flapAngle = pegasus.getMetadata().getInterpolator(interpolatorId).interpolate("wingFlap", flapAngle, 10);
         }
 
         getLeft().rotateFlying(flapAngle);
@@ -78,7 +80,7 @@ public class PegasusWings<T extends AbstractPonyModel & IModelPegasus> implement
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         getLeft().render(scale);
         getRight().render(scale);
     }

src/main/java/com/minelittlepony/model/components/PonyTail.java

@@ -9,6 +9,8 @@ import com.minelittlepony.model.AbstractPonyModel;
 import com.minelittlepony.model.capabilities.IModelPart;
 import com.minelittlepony.render.model.PlaneRenderer;
 
+import java.util.UUID;
+
 public class PonyTail extends PlaneRenderer implements IModelPart {
 
     private static final int SEGMENTS = 4;
@@ -30,7 +32,7 @@ public class PonyTail extends PlaneRenderer implements IModelPart {
     }
 
     @Override
-    public void setRotationAndAngles(boolean rainboom, float move, float swing, float bodySwing, float ticks) {
+    public void setRotationAndAngles(boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
         rotateAngleZ = rainboom ? 0 : MathHelper.cos(move * 0.8F) * 0.2f * swing;
         rotateAngleY = bodySwing;
 
@@ -76,7 +78,7 @@ public class PonyTail extends PlaneRenderer implements IModelPart {
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         render(scale);
     }
 

src/main/java/com/minelittlepony/model/components/SeaponyTail.java

@@ -6,6 +6,8 @@ import com.minelittlepony.model.capabilities.IModelPart;
 import com.minelittlepony.render.model.PlaneRenderer;
 import com.minelittlepony.render.model.PonyRenderer;
 
+import java.util.UUID;
+
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.util.math.MathHelper;
 
@@ -52,7 +54,7 @@ public class SeaponyTail implements IModelPart {
     }
 
     @Override
-    public void setRotationAndAngles(boolean rainboom, float move, float swing, float bodySwing, float ticks) {
+    public void setRotationAndAngles(boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
         float rotation = model.isSleeping() ? 0 : MathHelper.sin(ticks * 0.536f) / 4;
 
         tailBase.rotateAngleX = TAIL_ROTX + rotation;
@@ -61,7 +63,7 @@ public class SeaponyTail implements IModelPart {
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
         GlStateManager.enableBlend();
         tailBase.render(scale);

src/main/java/com/minelittlepony/model/components/UnicornHorn.java

@@ -5,6 +5,8 @@ import com.minelittlepony.model.capabilities.IModelPart;
 import com.minelittlepony.render.model.GlowRenderer;
 import com.minelittlepony.render.model.PonyRenderer;
 
+import java.util.UUID;
+
 import net.minecraft.client.model.ModelBase;
 
 import static org.lwjgl.opengl.GL11.*;
@@ -38,7 +40,7 @@ public class UnicornHorn implements IModelPart {
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         if (isVisible) {
             horn.render(scale);
         }

src/main/java/com/minelittlepony/model/gear/AbstractGear.java

@@ -39,7 +39,7 @@ public abstract class AbstractGear extends ModelBase implements IGear, PonyModel
         TextureManager tex = Minecraft.getMinecraft().getRenderManager().renderEngine;
         tex.bindTexture(getTexture(entity));
 
-        renderPart(scale);
+        renderPart(scale, entity.getUniqueID());
 
         GL11.glPopAttrib();
     }

src/main/java/com/minelittlepony/model/gear/ChristmasHat.java

@@ -13,6 +13,7 @@ import com.minelittlepony.render.model.PonyRenderer;
 import com.minelittlepony.util.render.Color;
 
 import java.util.Calendar;
+import java.util.UUID;
 
 public class ChristmasHat extends AbstractGear {
 
@@ -57,7 +58,7 @@ public class ChristmasHat extends AbstractGear {
     }
 
     @Override
-    public void setRotationAndAngles(boolean rainboom, float move, float swing, float bodySwing, float ticks) {
+    public void setRotationAndAngles(boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
         float pi = PI * (float) Math.pow(swing, 16);
 
         float mve = move * 0.6662f;
@@ -88,7 +89,7 @@ public class ChristmasHat extends AbstractGear {
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
 
         if (tint != 0) {

src/main/java/com/minelittlepony/model/gear/Muffin.java

@@ -8,6 +8,8 @@ import com.minelittlepony.model.capabilities.IModel;
 import com.minelittlepony.pony.data.PonyWearable;
 import com.minelittlepony.render.model.PonyRenderer;
 
+import java.util.UUID;
+
 public class Muffin extends AbstractGear implements IStackable {
 
     private static final ResourceLocation TEXTURE = new ResourceLocation("minelittlepony", "textures/models/muffin.png");
@@ -26,7 +28,7 @@ public class Muffin extends AbstractGear implements IStackable {
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         crown.render(scale);
     }
 

src/main/java/com/minelittlepony/model/gear/SaddleBags.java

@@ -6,6 +6,8 @@ import com.minelittlepony.model.capabilities.IModelPegasus;
 import com.minelittlepony.pony.data.PonyWearable;
 import com.minelittlepony.render.model.PlaneRenderer;
 
+import java.util.UUID;
+
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.entity.Entity;
 import net.minecraft.util.ResourceLocation;
@@ -82,7 +84,7 @@ public class SaddleBags extends AbstractGear {
     }
 
     @Override
-    public void setRotationAndAngles(boolean rainboom, float move, float swing, float bodySwing, float ticks) {
+    public void setRotationAndAngles(boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
         float pi = PI * (float) Math.pow(swing, 16);
 
         float mve = move * 0.6662f;
@@ -109,8 +111,8 @@ public class SaddleBags extends AbstractGear {
     }
 
     @Override
-    public void renderPart(float scale) {
-        dropAmount = model.getMetadata().getInterpolator().interpolate("dropAmount", dropAmount, 3);
+    public void renderPart(float scale, UUID interpolatorId) {
+        dropAmount = model.getMetadata().getInterpolator(interpolatorId).interpolate("dropAmount", dropAmount, 3);
 
         GlStateManager.pushMatrix();
         GlStateManager.translate(0, dropAmount, 0);

src/main/java/com/minelittlepony/model/gear/Stetson.java

@@ -9,6 +9,8 @@ import com.minelittlepony.pony.data.PonyWearable;
 import com.minelittlepony.render.model.PlaneRenderer;
 import com.minelittlepony.render.model.PonyRenderer;
 
+import java.util.UUID;
+
 public class Stetson extends AbstractGear implements IStackable {
     private static final ResourceLocation TEXTURE = new ResourceLocation("minelittlepony", "textures/models/stetson.png");
 
@@ -41,7 +43,7 @@ public class Stetson extends AbstractGear implements IStackable {
     }
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         rimshot.render(scale);
     }
 

src/main/java/com/minelittlepony/model/gear/WitchHat.java

@@ -8,6 +8,8 @@ import com.minelittlepony.model.capabilities.IModel;
 import com.minelittlepony.pony.data.PonyWearable;
 import com.minelittlepony.render.model.PonyRenderer;
 
+import java.util.UUID;
+
 public class WitchHat extends AbstractGear implements IStackable {
 
     private static final ResourceLocation WITCH_TEXTURES = new ResourceLocation("textures/entity/witch.png");
@@ -15,7 +17,7 @@ public class WitchHat extends AbstractGear implements IStackable {
     private PonyRenderer witchHat;
 
     @Override
-    public void renderPart(float scale) {
+    public void renderPart(float scale, UUID interpolatorId) {
         witchHat.render(scale * 1.3F);
     }
 

src/main/java/com/minelittlepony/model/player/ModelAlicorn.java

@@ -28,7 +28,7 @@ public class ModelAlicorn extends ModelUnicorn implements IModelPegasus {
         super.setRotationAngles(move, swing, ticks, headYaw, headPitch, scale, entity);
 
         if (canFly()) {
-            wings.setRotationAndAngles(rainboom, move, swing, 0, ticks);
+            wings.setRotationAndAngles(rainboom, entity.getUniqueID(), move, swing, 0, ticks);
         }
     }
 
@@ -36,7 +36,7 @@ public class ModelAlicorn extends ModelUnicorn implements IModelPegasus {
     protected void renderBody(Entity entity, float move, float swing, float ticks, float headYaw, float headPitch, float scale) {
         super.renderBody(entity, move, swing, ticks, headYaw, headPitch, scale);
         if (canFly()) {
-            wings.renderPart(scale);
+            wings.renderPart(scale, entity.getUniqueID());
         }
     }
 }

src/main/java/com/minelittlepony/model/player/ModelPegasus.java

@@ -26,12 +26,12 @@ public class ModelPegasus extends ModelEarthPony implements IModelPegasus {
     @Override
     public void setRotationAngles(float move, float swing, float ticks, float headYaw, float headPitch, float scale, Entity entity) {
         super.setRotationAngles(move, swing, ticks, headYaw, headPitch, scale, entity);
-        wings.setRotationAndAngles(rainboom, move, swing, 0, ticks);
+        wings.setRotationAndAngles(rainboom, entity.getUniqueID(), move, swing, 0, ticks);
     }
 
     @Override
     protected void renderBody(Entity entity, float move, float swing, float ticks, float headYaw, float headPitch, float scale) {
         super.renderBody(entity, move, swing, ticks, headYaw, headPitch, scale);
-        wings.renderPart(scale);
+        wings.renderPart(scale, entity.getUniqueID());
     }
 }

src/main/java/com/minelittlepony/model/player/ModelUnicorn.java

@@ -138,7 +138,7 @@ public class ModelUnicorn extends ModelEarthPony implements IModelUnicorn {
         super.renderHead(entity, move, swing, ticks, headYaw, headPitch, scale);
 
         if (canCast()) {
-            horn.renderPart(scale);
+            horn.renderPart(scale, entity.getUniqueID());
             if (isCasting()) {
                 horn.renderMagic(getMagicColor(), scale);
             }

src/main/java/com/minelittlepony/model/ponies/ModelSeapony.java

@@ -152,7 +152,7 @@ public class ModelSeapony extends ModelUnicorn {
         bodyCenter.render(scale);
         bipedBody.postRender(scale);
 
-        tail.renderPart(scale);
+        tail.renderPart(scale, entity.getUniqueID());
 
         GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
         GlStateManager.enableBlend();

src/main/java/com/minelittlepony/pony/data/IPonyData.java

@@ -2,6 +2,8 @@ package com.minelittlepony.pony.data;
 
 import com.minelittlepony.model.anim.IInterpolator;
 
+import java.util.UUID;
+
 import net.minecraft.client.resources.data.IMetadataSection;
 
 /**
@@ -46,5 +48,5 @@ public interface IPonyData extends IMetadataSection {
     /**
      * Gets an interpolator for interpolating values.
      */
-    IInterpolator getInterpolator();
+    IInterpolator getInterpolator(UUID interpolatorId);
 }

src/main/java/com/minelittlepony/pony/data/Pony.java

@@ -3,6 +3,7 @@ package com.minelittlepony.pony.data;
 import com.google.common.base.MoreObjects;
 import com.minelittlepony.MineLittlePony;
 import com.minelittlepony.ducks.IRenderPony;
+import com.minelittlepony.util.chron.Touchable;
 import com.voxelmodpack.hdskins.resources.texture.DynamicTextureImage;
 import com.voxelmodpack.hdskins.resources.texture.IBufferedTexture;
 import com.voxelmodpack.hdskins.util.ProfileTextureUtil;
@@ -33,7 +34,7 @@ import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
 @Immutable
-public class Pony implements IPony {
+public class Pony extends Touchable<Pony> implements IPony {
 
     private static final AtomicInteger ponyCount = new AtomicInteger();
 
@@ -42,22 +43,11 @@ public class Pony implements IPony {
     private final ResourceLocation texture;
     private final IPonyData metadata;
 
-    private long expirationPeriod;
-
     public Pony(ResourceLocation resource) {
         texture = resource;
         metadata = checkSkin(texture);
     }
 
-    boolean hasExpired() {
-        return expirationPeriod <= System.currentTimeMillis();
-    }
-
-    Pony touch() {
-        expirationPeriod = System.currentTimeMillis() + 30000;
-        return this;
-    }
-
     private IPonyData checkSkin(ResourceLocation resource) {
         IPonyData data = checkPonyMeta(resource);
         if (data != null) {

src/main/java/com/minelittlepony/pony/data/PonyData.java

@@ -5,6 +5,8 @@ import com.minelittlepony.model.anim.BasicEasingInterpolator;
 import com.minelittlepony.model.anim.IInterpolator;
 
 import java.awt.image.BufferedImage;
+import java.util.UUID;
+
 import javax.annotation.concurrent.Immutable;
 
 
@@ -22,8 +24,6 @@ public class PonyData implements IPonyData {
 
     private final boolean[] wearables;
 
-    private final IInterpolator interpolator = new BasicEasingInterpolator();
-
     public PonyData() {
         race = PonyRace.HUMAN;
         tailSize = TailLengths.FULL;
@@ -92,8 +92,8 @@ public class PonyData implements IPonyData {
     }
 
     @Override
-    public IInterpolator getInterpolator() {
-        return interpolator;
+    public IInterpolator getInterpolator(UUID interpolatorId) {
+        return BasicEasingInterpolator.getInstance(interpolatorId);
     }
 
     /**

src/main/java/com/minelittlepony/pony/data/PonyManager.java

@@ -1,11 +1,11 @@
 package com.minelittlepony.pony.data;
 
 import com.google.common.collect.Lists;
-import com.google.common.collect.Maps;
 import com.google.gson.Gson;
 import com.google.gson.JsonParseException;
 import com.minelittlepony.MineLittlePony;
 import com.minelittlepony.PonyConfig;
+import com.minelittlepony.util.chron.ChronicCache;
 import com.minelittlepony.util.math.MathUtil;
 import com.voxelmodpack.hdskins.ISkinCacheClearListener;
 import com.voxelmodpack.hdskins.util.MoreStreams;
@@ -25,7 +25,6 @@ import java.io.Reader;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.Map;
 import java.util.Queue;
 import java.util.UUID;
 
@@ -49,7 +48,7 @@ public class PonyManager implements IResourceManagerReloadListener, ISkinCacheCl
 
     private PonyConfig config;
 
-    private final Map<ResourceLocation, Pony> poniesCache = Maps.newHashMap();
+    private final ChronicCache<ResourceLocation, Pony> poniesCache = new ChronicCache<>();
 
     public PonyManager(PonyConfig config) {
         this.config = config;
@@ -61,11 +60,7 @@ public class PonyManager implements IResourceManagerReloadListener, ISkinCacheCl
      * @param resource A texture resource
      */
     public IPony getPony(ResourceLocation resource) {
-        IPony result = poniesCache.computeIfAbsent(resource, Pony::new).touch();
-
-        poniesCache.entrySet().removeIf(entry -> entry.getValue().hasExpired());
-
-        return result;
+        return poniesCache.retrieve(resource, Pony::new);
     }
 
     /**
@@ -78,7 +73,7 @@ public class PonyManager implements IResourceManagerReloadListener, ISkinCacheCl
         ResourceLocation skin = player.getLocationSkin();
         UUID uuid = player.getGameProfile().getId();
 
-        if (Pony.getBufferedImage(skin) == null) {
+        if (true || Pony.getBufferedImage(skin) == null) {
             return getDefaultPony(uuid);
         }
 
@@ -89,7 +84,7 @@ public class PonyManager implements IResourceManagerReloadListener, ISkinCacheCl
         ResourceLocation skin = playerInfo.getLocationSkin();
         UUID uuid = playerInfo.getGameProfile().getId();
 
-        if (Pony.getBufferedImage(skin) == null) {
+        if (true || Pony.getBufferedImage(skin) == null) {
             return getDefaultPony(uuid);
         }
 
@@ -137,7 +132,7 @@ public class PonyManager implements IResourceManagerReloadListener, ISkinCacheCl
      * @param uuid  A UUID. Either a user or an entity.
      */
     public IPony getBackgroundPony(UUID uuid) {
-        if (getNumberOfPonies() == 0 || isUser(uuid)) {
+        if (true || getNumberOfPonies() == 0 || isUser(uuid)) {
             return getPony(getDefaultSkin(uuid));
         }
 
@@ -229,7 +224,7 @@ public class PonyManager implements IResourceManagerReloadListener, ISkinCacheCl
      * Returns true if the given uuid is of a player would would use the ALEX skin type.
      */
     public static boolean isSlimSkin(UUID uuid) {
-        return (uuid.hashCode() & 1) == 1;
+        return true || (uuid.hashCode() & 1) == 1;
     }
 
     private int getNumberOfPonies() {

src/main/java/com/minelittlepony/render/layer/LayerGear.java

@@ -83,8 +83,8 @@ public class LayerGear<T extends EntityLivingBase> extends AbstractPonyLayer<T>
         getRenderer().bindTexture(texture);
 
         gear.setLivingAnimations(model, entity);
-        gear.setRotationAndAngles(model.isGoingFast(), move, swing, model.getWobbleAmount(), ticks);
-        gear.renderPart(scale);
+        gear.setRotationAndAngles(model.isGoingFast(), entity.getUniqueID(), move, swing, model.getWobbleAmount(), ticks);
+        gear.renderPart(scale, entity.getUniqueID());
 
         GL11.glPopAttrib();
     }

src/main/java/com/minelittlepony/render/player/RenderSeaponyPlayer.java

@@ -29,7 +29,7 @@ public class RenderSeaponyPlayer extends RenderPonyPlayer {
         mainModel = renderPony.setPonyModel(wet ? seapony : normalPony);
 
         float state = wet ? 100 : 0;
-        float interpolated = pony.getMetadata().getInterpolator().interpolate("seapony_state", state, 5);
+        float interpolated = pony.getMetadata().getInterpolator(player.getUniqueID()).interpolate("seapony_state", state, 5);
 
         if (!MathUtil.compareFloats(interpolated, state)) {
             double x = player.posX + (player.getEntityWorld().rand.nextFloat() * 2) - 1;

src/main/java/com/minelittlepony/transform/PostureFlight.java

@@ -20,7 +20,7 @@ public class PostureFlight extends MotionCompositor implements PonyPosture<Abstr
 
         float roll = (float)calculateRoll(player, motionX,  motionY, motionZ);
 
-        roll = model.getMetadata().getInterpolator().interpolate("pegasusRoll", roll, 10);
+        roll = model.getMetadata().getInterpolator(player.getUniqueID()).interpolate("pegasusRoll", roll, 10);
 
         GlStateManager.rotate((float)roll, 0, 0, 1);
     }

src/main/java/com/minelittlepony/util/chron/ChronicCache.java

@@ -0,0 +1,20 @@
+package com.minelittlepony.util.chron;
+
+import java.util.HashMap;
+import java.util.function.Function;
+
+/**
+ * Special version of a map that culls its own values.
+ */
+public class ChronicCache<K, V extends Touchable<V>> extends HashMap<K, V> {
+    private static final long serialVersionUID = 6454924015818181978L;
+
+    public V retrieve(K key, Function<? super K, ? extends V> mappingFunction) {
+        V result = computeIfAbsent(key, mappingFunction).touch();
+
+        entrySet().removeIf(entry -> entry.getValue().hasExpired());
+
+        return result;
+    }
+
+}

src/main/java/com/minelittlepony/util/chron/Touchable.java

@@ -0,0 +1,29 @@
+package com.minelittlepony.util.chron;
+
+/**
+ * DON'T TOUCH ME I'M SCAREED
+ *
+ * Basic touchable object that expires if not gently caressed for all of 30 seconds.
+ */
+public abstract class Touchable<T extends Touchable<T>> {
+
+    private long expirationPeriod;
+
+    /**
+     * Returns whether this object is dead (expired).
+     * Expired Touchables are flushed from the ChronicCache on next access.
+     */
+    public boolean hasExpired() {
+        return expirationPeriod <= System.currentTimeMillis();
+    }
+
+    /**
+     * Touches this object.
+     * Internally just updates the expiration date.
+     */
+    @SuppressWarnings("unchecked")
+    public T touch() {
+        expirationPeriod = System.currentTimeMillis() + 30000;
+        return (T)this;
+    }
+}