scenes/levels: fix uses of utils

imperium-porcorum.love/scenes/levels/controller/camera.lua

@@ -38,7 +38,7 @@ function Level:cameraFollowPlayer(id)
     playy = playy - (self.cameraHeight/2)
 
     if (math.abs(playx) > 8) then
-      camx = camx + (playx - (8*math.sign(playx)))
+      camx = camx + (playx - (8*utils.math.sign(playx)))
     end
 
     if (playy > 16)  then

imperium-porcorum.love/scenes/levels/controller/draw.lua

@@ -47,8 +47,8 @@ function Level:drawHUD(dt)
 
   assets.fonts["medium"]:set()
 
-  love.graphics.printf( numberToString(self.score, 6), 373, 10, 96, "right")
-  love.graphics.printf( numberToString(self.gold, 4), 373, 25, 96-18, "right")
+  love.graphics.printf( utils.math.numberToString(self.score, 6), 373, 10, 96, "right")
+  love.graphics.printf( utils.math.numberToString(self.gold, 4), 373, 25, 96-18, "right")
   love.graphics.setColor(255, 255, 85)
   love.graphics.printf( "G", 373, 25, 96, "right")
   utils.graphics.resetColor()

imperium-porcorum.love/scenes/levels/entities/init.lua

@@ -88,7 +88,7 @@ function Entity:friction(dt)
   if (math.abs(self.xsp) <= self.frc) then
     self.xsp = 0
   else
-    self.xsp = self.xsp - (self.frc * math.sign(self.xsp))
+    self.xsp = self.xsp - (self.frc * utils.math.sign(self.xsp))
   end
 end
 
@@ -144,8 +144,8 @@ function Entity:move(dt)
 end
 
 function Entity:getDirection()
-  if not (math.sign(self.xsp) == 0) then
-    self.direction = math.sign(self.xsp)
+  if not (utils.math.sign(self.xsp) == 0) then
+    self.direction = utils.math.sign(self.xsp)
   end
 end
 

imperium-porcorum.love/scenes/levels/entities/player/weapon.lua

@@ -4,7 +4,7 @@ function Player:initWeapon()
 end
 
 function Player:launchWeapon()
-  Weapon(self.level, self.weapon, self.center.x, self.center.y, 350 * math.sign(self.direction))
+  Weapon(self.level, self.weapon, self.center.x, self.center.y, 350 * utils.math.sign(self.direction))
 end
 
 function Player:changeWeapon(id)