Implemented ground mech boosting

core/src/mindustry/entities/comp/HealthComp.java

@@ -0,0 +1,82 @@
+package mindustry.entities.comp;
+
+import arc.math.*;
+import arc.util.*;
+import mindustry.annotations.Annotations.*;
+import mindustry.gen.*;
+
+@Component
+abstract class HealthComp implements Entityc{
+    static final float hitDuration = 9f;
+
+    float health;
+    transient float hitTime;
+    transient float maxHealth = 1f;
+    transient boolean dead;
+
+    boolean isValid(){
+        return !dead && isAdded();
+    }
+
+    float healthf(){
+        return health / maxHealth;
+    }
+
+    @Override
+    public void update(){
+        hitTime -= Time.delta() / hitDuration;
+    }
+
+    void killed(){
+        //implement by other components
+    }
+
+    void kill(){
+        if(dead) return;
+
+        health = 0;
+        dead = true;
+        killed();
+        remove();
+    }
+
+    void heal(){
+        dead = false;
+        health = maxHealth;
+    }
+
+    boolean damaged(){
+        return health < maxHealth - 0.001f;
+    }
+
+    void damage(float amount){
+        health -= amount;
+        hitTime = 1f;
+        if(health <= 0 && !dead){
+            kill();
+        }
+    }
+
+    void damage(float amount, boolean withEffect){
+        float pre = hitTime;
+
+        damage(amount);
+
+        if(!withEffect){
+            hitTime = pre;
+        }
+    }
+
+    void damageContinuous(float amount){
+        damage(amount * Time.delta(), hitTime <= -20 + hitDuration);
+    }
+
+    void clampHealth(){
+        health = Mathf.clamp(health, 0, maxHealth);
+    }
+
+    void heal(float amount){
+        health += amount;
+        clampHealth();
+    }
+}