Reimplemented the vortex

src/main/java/com/minelittlepony/unicopia/spell/SpellRegistry.java

@@ -31,6 +31,7 @@ public class SpellRegistry {
         registerSpell(SpellFire::new);
         registerSpell(SpellIce::new);
         registerSpell(SpellPortal::new);
+        registerSpell(SpellVortex::new);
     }
 
     public IMagicEffect getSpellFromName(String name) {

src/main/java/com/minelittlepony/unicopia/spell/SpellVortex.java

@@ -0,0 +1,49 @@
+package com.minelittlepony.unicopia.spell;
+
+import com.minelittlepony.unicopia.UParticles;
+import com.minelittlepony.unicopia.particle.Particles;
+import com.minelittlepony.unicopia.player.PlayerSpeciesList;
+import com.minelittlepony.util.shape.Sphere;
+
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.util.math.Vec3d;
+
+public class SpellVortex extends SpellShield {
+
+    @Override
+    public String getName() {
+        return "vortex";
+    }
+
+    @Override
+    protected void spawnParticles(ICaster<?> source, int strength) {
+        Vec3d pos = source.getOriginVector();
+
+        source.spawnParticles(new Sphere(false, strength), strength * 9, p -> {
+            Particles.instance().spawnParticle(UParticles.MAGIC_PARTICLE, false, p, p.subtract(pos));
+        });
+    }
+
+    @Override
+    protected void applyRadialEffect(ICaster<?> source, Entity target, double distance, double radius) {
+        Vec3d pos = source.getOriginVector();
+
+        double force = 4 / distance;
+
+        if (source.getAffinity() != SpellAffinity.BAD && target instanceof EntityPlayer) {
+            force *= calculateAdjustedForce(PlayerSpeciesList.instance().getPlayer((EntityPlayer)target));
+        }
+
+        applyForce(pos, target, -force, 0);
+
+        float maxVel = source.getAffinity() != SpellAffinity.BAD ? 1.6f : 1;
+
+        if (target.motionX > maxVel) target.motionX = maxVel;
+        if (target.motionX < -maxVel) target.motionX = -maxVel;
+        if (target.motionY > maxVel) target.motionY = maxVel;
+        if (target.motionY < -maxVel) target.motionY = -maxVel;
+        if (target.motionZ > maxVel) target.motionZ = maxVel;
+        if (target.motionZ < -maxVel) target.motionZ = -maxVel;
+    }
+}

src/main/resources/assets/unicopia/lang/en_US.lang

@@ -34,7 +34,7 @@ spell.fire.name=Flame
 spell.infero.name=Burning
 spell.ice.name=Frost
 spell.portal.name=Transportation
-spell.attract.name=Retention
+spell.vortex.name=Retention
 spell.minion.name=Obedience
 
 curse.shield.name=Repulsion