scenes/boost: add a relative camera system

sonic-boost.love/scenes/subgame/sonic-boost/actors/character.lua

@@ -47,6 +47,7 @@ function Character:new(charcontroller, rail, character, id)
   self.canAction        = true
 
   self.dash           = false
+  self.dashCam        = false
 
   self:setDebugColor(0, 255, 0)
 
@@ -67,6 +68,11 @@ function Character:new(charcontroller, rail, character, id)
   self.startx = self.x
   self.starty = self.y
 
+  self.view     = {}
+  self.view.x   = self.x
+  self.view.y   = self.y
+  self.view.dx  = 0
+
   self.grind = false
 
   self.ai = isAIControlled or false
@@ -103,6 +109,7 @@ function Character:update(dt)
   self:snaptoRails(dt)
 
   self:move()
+  self:updateView()
 end
 
 -- ACTIONS FUNCTIONS --
@@ -153,11 +160,12 @@ end
 function Character:normalAction()
   if self.data.stats.action == "spinattack" then
     if (self.keys["B"].isPressed) and (self.onGround) and (self.canAction) and (self.grind == false) then
-      self.xspeed = math.max(self.xspeed, self.data.stats.spd * 60)
+      self.xspeed = math.max(self.xspeed, self.data.stats.spd * 60 * 1.5)
       self.isInAction = true
       self.canAction = false
       self:addTimer("action", .5)
       self:addTimer("action_cooldown", 1)
+      self.dashCam = true
     end
   end
 end
@@ -181,6 +189,34 @@ function Character:move()
 
 end
 
+function Character:updateView()
+  local MAXVIEW = - 80
+  local MINVIEW =   20
+  local targetView = 0
+
+  if self.dash or self.dashCam then
+    targetView = MAXVIEW
+  end
+
+  local viewDirection = utils.math.sign(targetView - self.view.dx)
+  self.view.dx = self.view.dx + phys.acc * viewDirection * 1.75
+  --self.view.dx = self.view.dx + (self.xspeed - self.data.stats.spd*60)
+
+  self.view.x = self.x + math.max(MAXVIEW, math.min(self.view.dx, MINVIEW))
+
+  print(self.dash)
+  print(targetView .. ";" .. self.x .. ";" .. self.view.x)
+end
+
+function Character:getViewCenter()
+  local x, y, z
+  x = math.floor(self.view.x + self.w / 2)
+  y = math.floor(self.y + self.h / 2)
+  z = math.floor(self.z + self.d / 2)
+
+  return x, y, z
+end
+
 function Character:collisionResponse(other)
   if other == nil then return 0 end
   if other.type == "collectible" then
@@ -460,6 +496,7 @@ function Character:endedTimer(name)
     self.bonus = 0
   elseif name == "action" then
     self.isInAction = false
+    self.dashCam    = false
   elseif name == "action_cooldown" then
     self.canAction = true
   end

sonic-boost.love/scenes/subgame/sonic-boost/actors/parent.lua

@@ -127,6 +127,10 @@ function ParentEntity:getCenter()
   return x, y, z
 end
 
+function ParentEntity:getViewCenter()
+  return self:getCenter()
+end
+
 function ParentEntity:getOrigin()
   local x, y, z
   y = math.floor(self.y + self.h / 2)

sonic-boost.love/scenes/subgame/sonic-boost/controller/camera.lua

@@ -92,7 +92,7 @@ function CameraSystem:followEntity(entity)
   if (entity ~= nil) then
     self.turn = entity.turn or 1
 
-    local playx, playy = entity:getCenter()
+    local playx, playy = entity:getViewCenter()
 
     local camx, camy   =  self.view.x + (self.width/2),
                           self.view.y + (self.height/2)