Add Shooter:changeTo() function

This function allows changing the Shooter appearances on the fly.
Not used in anything, but will be handy in the future.

src/Shooter.lua

@@ -16,11 +16,8 @@ local ShotSphere = require("src/ShotSphere")
 ---Constructs a new Shooter.
 ---@param data? table Data for the shooter.
 function Shooter:new(data)
-    self.config = _Game.configManager:getShooter(data and data.name or "default")
-    self.movement = self.config.movement
-    if data and data.movement then
-        self.movement = data.movement
-    end
+    self.levelMovement = data and data.movement
+    self:changeTo(data and data.name or "default")
 
     self.pos = self:getInitialPos()
     self.angle = self:getInitialAngle()
@@ -43,15 +40,24 @@ function Shooter:new(data)
     self.moveKeySpeed = 500
     self.rotateKeySpeed = 4
 
+    self.sphereEntity = nil
+end
+
+
+
+---Changes this Shooter's configuration to the given one.
+---@param name string The new shooter config to be obeyed.
+function Shooter:changeTo(name)
+    self.config = _Game.configManager:getShooter(name)
+    self.movement = self.levelMovement or self.config.movement
+
     self.sprite = self.config.sprite
     self.shadowSprite = self.config.shadowSprite
     self.speedShotSprite = self.config.speedShotBeam.sprite
 
     self.reticleSprite = self.config.reticle.sprite
     self.reticleNextSprite = self.config.reticle.nextBallSprite
     self.radiusReticleSprite = self.config.reticle.radiusSprite
-
-    self.sphereEntity = nil
 end