Backport ArrowDMG fix

sources/src/main/java/io/akarin/server/mixin/core/MixinEntityLiving.java

@@ -0,0 +1,57 @@
+package io.akarin.server.mixin.core;
+
+import javax.annotation.Nullable;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import net.minecraft.server.EntityLiving;
+import net.minecraft.server.EntityPlayer;
+import net.minecraft.server.MathHelper;
+import net.minecraft.server.MobEffect;
+import net.minecraft.server.MobEffectList;
+import net.minecraft.server.MobEffects;
+
+@Mixin(value = EntityLiving.class, remap = false)
+public abstract class MixinEntityLiving {
+	@Shadow public abstract boolean hasEffect(MobEffectList mobeffectlist);
+	@Shadow @Nullable public abstract MobEffect getEffect(MobEffectList mobeffectlist);
+	@Shadow protected abstract float ct();
+	@Shadow public abstract boolean isSprinting();
+	@Shadow public double motX;
+	@Shadow public double motY;
+	@Shadow public double motZ;
+	@Shadow public float yaw;
+	@Shadow public float pitch;
+	@Shadow public boolean impulse;
+	protected long lastJumpTime = 0L; // Dionysus - Backport ArrowDMG fix
+	
+	@Overwrite
+	protected void cu() {
+        // Dionysus start - Backport ArrowDMG fix
+        long time = System.nanoTime();
+        boolean canCrit = true;
+        if ((Object)this instanceof EntityPlayer) {
+            canCrit = false;
+            if (time - lastJumpTime > (long)(0.250e9)) {
+                lastJumpTime = time;
+                canCrit = true;
+            }
+        }
+        // Dionysus end - Backport ArrowDMG fix
+        motY = (double) ct();
+        if (hasEffect(MobEffects.JUMP)) {
+            motY += (double) ((float) (getEffect(MobEffects.JUMP).getAmplifier() + 1) * 0.1F);
+        }
+
+        if (canCrit&&isSprinting()) {
+            float f = yaw * 0.017453292F;
+
+            motX -= (double) (MathHelper.sin(f) * 0.2F);
+            motZ += (double) (MathHelper.cos(f) * 0.2F);
+        }
+
+        impulse = true;
+    }
+}