Merge pull request #3058 from MEEPofFaith/speed-lightning

v5 Javelin Movement Lightning Ability

core/src/mindustry/entities/abilities/MovementLightningAbility.java

@@ -0,0 +1,46 @@
+package mindustry.entities.abilities;
+
+import arc.graphics.*;
+import arc.math.*;
+import arc.util.*;
+import arc.audio.*;
+import mindustry.content.*;
+import mindustry.entities.*;
+import mindustry.gen.*;
+
+public class MovementLightningAbility extends Ability{
+    //Lightning damage
+    public float damage = 35f;
+    //Chance of firing every tick. Set >= 1 to always fire lightning every tick at max speed.
+    public float chance = 0.15f;
+    //Length of the lightning
+    public int length = 12;
+    //Speeds for when to start lightninging and when to stop getting faster
+    public float minSpeed = 0.8f, maxSpeed = 1.2f;
+    //Lightning Color
+    public Color color = Color.valueOf("a9d8ff");
+    
+    public Effect shootEffect = Fx.sparkShoot;
+    public Sound shootSound = Sounds.spark;
+    
+    MovementLightningAbility(){}
+    
+    public MovementLightningAbility(float damage, int length, float chance, float minSpeed, float maxSpeed, Color color){
+        this.damage = damage;
+        this.length = length;
+        this.chance = chance;
+        this.minSpeed = minSpeed;
+        this.maxSpeed = maxSpeed;
+        this.color = color;
+    }
+    
+    @Override
+    public void update(Unit unit){
+        float scl = Mathf.clamp((unit.vel().len() - minSpeed) / (maxSpeed - minSpeed));
+        if(Mathf.chance(Time.delta * (chance * scl))){
+            shootEffect.at(unit.x, unit.y, unit.rotation, color);
+            Lightning.create(unit.team, color, damage, unit.x + unit.vel().x, unit.y + unit.vel().y, unit.rotation, length);
+            shootSound.at(unit.x, unit.y);
+        }
+    }
+}