Included Path Interpolation methods in KeyframeList and uses it in PathPreviewRenderer

Created newInstance() method in KeyframeValue interface

src/main/java/eu/crushedpixel/replaymod/holders/Keyframe.java

@@ -13,7 +13,7 @@ public class Keyframe<T extends KeyframeValue> {
     private int realTimestamp;
     private T value;
 
-    public Keyframe copy() {
+    public Keyframe<T> copy() {
         return new Keyframe<T>(realTimestamp, value);
     }
 }

src/main/java/eu/crushedpixel/replaymod/holders/Point.java

@@ -7,9 +7,13 @@ import lombok.NoArgsConstructor;
 
 @AllArgsConstructor
 @NoArgsConstructor
-public class Point extends KeyframeValue {
+public class Point implements KeyframeValue {
 
     @Interpolate
     public double x, y;
 
+    @Override
+    public Point newInstance() {
+        return new Point();
+    }
 }

src/main/java/eu/crushedpixel/replaymod/holders/Position.java

@@ -4,7 +4,6 @@ import eu.crushedpixel.replaymod.interpolation.Interpolate;
 import eu.crushedpixel.replaymod.interpolation.KeyframeValue;
 import lombok.AllArgsConstructor;
 import lombok.Data;
-import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import net.minecraft.client.Minecraft;
 import net.minecraft.entity.Entity;
@@ -12,8 +11,7 @@ import net.minecraft.entity.Entity;
 @Data
 @AllArgsConstructor
 @NoArgsConstructor
-@EqualsAndHashCode(callSuper=true)
-public class Position extends KeyframeValue {
+public class Position implements KeyframeValue {
 
     @Interpolate
     public double x, y, z;
@@ -44,4 +42,9 @@ public class Position extends KeyframeValue {
         double dz = this.z -  z;
         return dx * dx + dy * dy + dz * dz;
     }
+
+    @Override
+    public Position newInstance() {
+        return new Position();
+    }
 }

src/main/java/eu/crushedpixel/replaymod/holders/TimestampValue.java

@@ -7,9 +7,14 @@ import lombok.NoArgsConstructor;
 
 @AllArgsConstructor
 @NoArgsConstructor
-public class TimestampValue extends KeyframeValue {
+public class TimestampValue implements KeyframeValue {
 
     @Interpolate
     public double value;
 
+    @Override
+    public TimestampValue newInstance() {
+        return new TimestampValue();
+    }
+
 }