fix: add damage number system

Fix #39

sonic-radiance.love/scenes/battlesystem/actors/battler.lua

@@ -26,6 +26,12 @@ function Battler:new(world, x, y, z, owner)
   self.isActive = false
   self.debugActiveTimer = 0
 
+  self.damageNumber = {}
+  self.damageNumber.num = 0
+  self.damageNumber.isBad = true
+  self.showDamage = false
+  self.damageY = 0
+
   self.isSelected = false
   self.owner = owner
 end
@@ -34,6 +40,19 @@ function Battler:destroy()
   Battler.super.destroy(self)
 end
 
+function Battler:getDamageNumberY()
+  return 32
+end
+
+function Battler:setDamageNumber(number)
+  self.damageNumber.isBad = number < 0
+  self.damageNumber.num = math.abs(math.floor(number))
+  self.damageY = self:getDamageNumberY() - 8
+  self.tweens:newTween(0, 0.4, {damageY = self:getDamageNumberY()}, "outBack")
+  self.showDamage = true
+  self.tweens:newTimer(0.5, "removeDamage")
+end
+
 function Battler:setActive()
   core.debug:print("cbs/actor","actor " .. self.id .. " is active")
   self.isActive = true
@@ -216,6 +235,8 @@ function Battler:timerResponse(signal)
 
   if (signal == "resetMovement") then
     self.movementType = MOVEMENT_NONE
+  elseif (signal == "removeDamage") then
+    self.showDamage = false
   end
 end
 
@@ -237,6 +258,20 @@ function Battler:die()
 end
 
 -- DRAW FUNCTIONS
+function Battler:drawDamageNumber()
+  if (self.showDamage) then
+    local x, y = self.world.map:gridToPixel(self.x, self.y, true)
+    if (self.damageNumber.isBad) then
+      love.graphics.setColor(1, 0, 0, 1)
+    else
+      love.graphics.setColor(0, 1, 0, 1)
+    end
+
+    self.assets.fonts["hudnbrs_small"]:print(self.damageNumber.num, x, y - self.damageY, "center")
+    utils.graphics.resetColor()
+  end
+end
+
 function Battler:draw()
   local x, y = self.world.map:gridToPixel(self.x, self.y, true)
   love.graphics.setColor(1, 0, 0, 1)

sonic-radiance.love/scenes/battlesystem/actors/ennemy.lua

@@ -28,6 +28,8 @@ function Ennemy:draw()
     local height = 32
     self.assets.images["cursorpeak"]:draw(x - 7, y - 24 - 32)
   end
+  
+  self:drawDamageNumber()
 end
 
 function Ennemy:die()

sonic-radiance.love/scenes/battlesystem/actors/hero.lua

@@ -66,6 +66,7 @@ end
 
 function Hero:draw()
   self:drawSprite(0, -self.z)
+  self:drawDamageNumber()
 end
 
 return Hero

sonic-radiance.love/scenes/battlesystem/controllers/fighters/parent.lua

@@ -25,7 +25,12 @@ end
 -- LIFE handling functions
 
 function FighterParent:setHP(value, relative)
+  local relativeNumber = value
+  if (not relative) then
+    relativeNumber = relative - self.abstract.hp
+  end
   self.abstract:setHP(value, relative)
+  self.actor:setDamageNumber(relativeNumber)
 end
 
 function FighterParent:setPP(value, relative)