Added scaleLifetimeOffset and Centered Ripple Projectiles (#10292)

* Added scaleLifetimeOffset
Changed ripple to have its shot centered, calculated by: (1 - velocityRnd/2)^-1

* unneccessary parenthesis

* Update Turret.java

one last adjustement, hopefully

core/src/mindustry/content/Blocks.java

@@ -3754,6 +3754,7 @@ public class Blocks{
             ammoUseEffect = Fx.casing3Double;
             ammoPerShot = 2;
             velocityRnd = 0.2f;
+            scaleLifetimeOffset = 1f / 9f;
             recoil = 6f;
             shake = 2f;
             range = 290f;

core/src/mindustry/world/blocks/defense/turrets/Turret.java

@@ -54,6 +54,8 @@ public class Turret extends ReloadTurret{
     public float inaccuracy = 0f;
     /** Fraction of bullet velocity that is random. */
     public float velocityRnd = 0f;
+    /** Fraction of lifetime that is added to bullets with lifeScale. */
+    public float scaleLifetimeOffset = 0f;
     /** Maximum angle difference in degrees at which turret will still try to shoot. */
     public float shootCone = 8f;
     /** Turret shoot point. */
@@ -640,7 +642,7 @@ public class Turret extends ReloadTurret{
             bulletY = y + Angles.trnsy(rotation - 90, shootX + xOffset + xSpread, shootY + yOffset),
             shootAngle = rotation + angleOffset + Mathf.range(inaccuracy + type.inaccuracy);
 
-            float lifeScl = type.scaleLife ? Mathf.clamp(Mathf.dst(bulletX, bulletY, targetPos.x, targetPos.y) / type.range, minRange / type.range, range() / type.range) : 1f;
+            float lifeScl = type.scaleLife ? Mathf.clamp((1 + scaleLifetimeOffset) * Mathf.dst(bulletX, bulletY, targetPos.x, targetPos.y) / type.range, minRange / type.range, range() / type.range) : 1f;
 
             //TODO aimX / aimY for multi shot turrets?
             handleBullet(type.create(this, team, bulletX, bulletY, shootAngle, -1f, (1f - velocityRnd) + Mathf.random(velocityRnd), lifeScl, null, mover, targetPos.x, targetPos.y), xOffset, yOffset, shootAngle - rotation);