feat(overworld): add jump

sonic-radiance.love/scenes/overworld/actors/player.lua

@@ -26,6 +26,8 @@ function Player:new(world, x, y, id)
   self.previousMap = 0
 
   self:updateCurrentCharset()
+  self.onGround = true
+  self.isJumping = false
 end
 
 function Player:updateStart(dt)
@@ -49,10 +51,22 @@ function Player:updateStart(dt)
   end
 
   if self.keys["select"].isPressed and self.canChangeActive then
-    game.characters:setActiveCharacter()
+    if (self.onGround) then
-    self.canChangeActive = false
+      game.characters:setActiveCharacter()
-    self.tweens:newTimer(0.3, "changeCharacter")
+      self.canChangeActive = false
-    self.tweens:newTween(0, 0.3, {activeVisible = self.activeVisible + 1}, "inQuad")
+      self.tweens:newTimer(0.3, "changeCharacter")
+      self.tweens:newTween(0, 0.3, {activeVisible = self.activeVisible + 1}, "inQuad")
+    end
+  end
+
+  if self.keys["B"].isPressed then
+    if (self.onGround) then
+      self.zsp = 2.5
+      self.grav = 10
+      self.onGround = false
+      self.isJumping = true
+      self.assets.sfx["jump"]:play()
+    end
   end
 
   self.tweens:update(dt)
@@ -71,10 +85,44 @@ function Player:updateStart(dt)
       self.scene:updateCurrentMap(currentMap)
     end
   end
+
+  self:updateCurrentCharset()
 end
 
+function Player:applyGravity(dt)
+  local grav = self.grav * -1
+  self.zsp = self.zsp + (grav * dt)
+
+  if utils.math.sign(self.zsp) == utils.math.sign(grav) then
+    self:checkGround( )
+  end
+end
+
+function Player:checkGround()
+  if (self.z + self.zsp <= 0) then
+    self.onGround = true
+    self.isJumping = false
+    self.z = 0
+    self.zsp = 0
+  end
+end
+
+function Player:autoMove(dt)
+  Player.super.autoMove(self, dt)
+  self.z = self.z + self.zsp
+end
+
+
 function Player:updateCurrentCharset()
-  self:setCharset(self.active.data.charset, self.active.data.charId)
+  if (not self.isJumping) then
+    self:setCharset(self.active.data.charset, self.active.data.charId)
+    self.largeAnim = false
+    self.isFast = false
+  else
+    self:setCharset(self.active.data.charset .. "-jump", self.active.data.charId)
+    self.largeAnim = true
+    self.isFast = true
+  end
 end
 
 function Player:collisionResponse(col)