inertia and refactor

source/scripts/player.lua

@@ -5,7 +5,7 @@ function Player:init(x, y)
 	Player.super.init(self, "assets/sprites/player", true)
 
 	-- Animation properties
-	self.animation:addState("run", 1, 7)
+	self.animation:addState("run", 8, 14)
 	self.animation.run.frameDuration = 2
 	self.animation:addState("up", 1, 7)
 	self.animation.up.frameDuration = 6
@@ -22,17 +22,27 @@ function Player:init(x, y)
 	-- Collision properties
 	self:setSize(64, 64)
 	self:moveTo(x, y)
-	self:setZIndex(10)
-	self:setCollideRect(3, 19, 63, 33)
+	self:setZIndex(ZIndex.player)
+	self:setGroups(CollideGroups.player)
+	self:setCollidesWithGroups(
+		{
+			CollideGroups.enemy,
+			CollideGroups.wall
+		})
+	self:setCollideRect(3, 19, 60, 33)
 	self:setTag(1)
 
 	-- Physics properties
+	self.fallSpeed = 0.05
 	self.xVelocity = 0
-	self.yVelocity = 0
+	self.yVelocity = self.fallSpeed
 	self.maxXSpeed = 2
 	self.maxYSpeed = 5
-	self.fallSpeed = 0.05
-	self.maxFallSpeed = 0.4
+	self.acceleration = 0.05
+	self.friction = 0.95
+	self.yInertia = 0
+	self.maxFallSpeed = 0.7
+	self.frictionAccel = 0.3
 
 	-- Player State
 	self.touchingGround = false
@@ -41,8 +51,9 @@ function Player:init(x, y)
 	Player.dead = false
 	Player.bat = 10000
 	Player.dischargeRate = 1
-	self.cantDown = false
 	Player.moveRight = false
+	self.lastDirection = nil
+	self.targetDone = false
 end
 
 function Player:handleInput()
@@ -52,54 +63,53 @@ function Player:handleInput()
 
 	local crankChange, acceleratedChange = playdate.getCrankChange()
 
-	if playdate.buttonJustReleased(playdate.kButtonLeft) or playdate.buttonJustReleased(playdate.kButtonRight) then
-		self.cantDown = false
-	end
-
-	if playdate.buttonIsPressed(playdate.kButtonLeft) then
-		self:changeToRunState("left")
-		self:setRotation(10)
-		self.cantDown = true
+	-- X velocity
+	if not playdate.buttonIsPressed(playdate.kButtonLeft) and not playdate.buttonIsPressed(playdate.kButtonRight) then
+		self.xVelocity = self.xVelocity * self.friction
 		Player.moveRight = false
-	elseif playdate.buttonIsPressed(playdate.kButtonRight) then
-		self:changeToRunState("right")
-		self:setRotation(10)
-		self.cantDown = true
-		Player.moveRight = true
 	end
 
+	local isChangingDirection = false
+	if playdate.buttonIsPressed(playdate.kButtonLeft) then
+		if self.lastDirection == "right" then
+			isChangingDirection = true
+		end
+		self:changeToRunState("left")
+		self.lastDirection = "left"
+		self.xVelocity = self.xVelocity - self.acceleration
+	elseif playdate.buttonIsPressed(playdate.kButtonRight) then
+		if self.lastDirection == "left" then
+			isChangingDirection = true
+		end
+		self:changeToRunState("right")
+		Player.moveRight = true
+		self.lastDirection = "right"
+		self.xVelocity = self.xVelocity + self.acceleration
+	end
+
+	if isChangingDirection then
+		self.xVelocity = self.xVelocity * self.frictionAccel
+	end
+
+	-- Y velocity
 	if crankChange ~= 0 then
-		local force = 0.01
 		if crankChange > 0 then
 			self.animation:setState("up")
 		else
 			self.animation:setState("down")
-			force = 0.05
 		end
-		self.yVelocity = self.yVelocity - acceleratedChange * force
-	elseif self.cantDown == false then
-		self.cantDown = false
-		self:changeToDownState()
+		self.yInertia = self.yInertia - (acceleratedChange * 0.007)
 	else
-		self.yVelocity = self.fallSpeed
+		self.yInertia = self.yInertia * self.friction
+		self.animation:setState("down")
 	end
 end
 
-function Player:changeToDownState()
-	Player.moveRight = false
-	self.yVelocity = self.fallSpeed
-	self.xVelocity = 0
-	self.animation:setState("down")
-	self:setRotation(0)
-end
-
 function Player:changeToRunState(direction)
 	if direction == "left" then
-		self.xVelocity = -self.maxXSpeed
 		self.animation.direction = Noble.Animation.DIRECTION_LEFT
 		self.animation:setState("run")
 	elseif direction == "right" then
-		self.xVelocity = self.maxXSpeed
 		self.animation.direction = Noble.Animation.DIRECTION_RIGHT
 		self.animation:setState("run")
 	end
@@ -129,12 +139,13 @@ function Player:handleMovementAndCollisions()
 	end
 
 	local xVel = self.xVelocity
+	local yVel = self.yVelocity + self.yInertia + self.fallSpeed
 
 	if (self.x < 20 and xVel < 0) or (self.x > 380 and xVel > 0) then -- Screen bounds
 		xVel = 0
 	end
 
-	local _, _, collisions, length = self:checkCollisions(self.x + xVel, self.y + self.yVelocity)
+	local _, _, collisions, length = self:checkCollisions(self.x + xVel, self.y + yVel)
 
 	self.touchingGround = false
 	self.touchingCeiling = false
@@ -161,12 +172,13 @@ function Player:handleMovementAndCollisions()
 			self:boom()
 			return
 		elseif collisionTag == 154 then -- Baleba
-			-- self:boom(collisionObject)
+			self:boom(collisionObject)
 			return
 		elseif collisionTag == 2 then -- Tank
 			self:boom()
 			BigBoom()
 
+			self.targetDone = true
 			local particleC = ParticlePoly(collisionObject.x, collisionObject.y)
 			particleC:setThickness(5)
 			particleC:setAngular(-15, 15)
@@ -180,7 +192,8 @@ function Player:handleMovementAndCollisions()
 			return
 		end
 	end
-	self:moveTo(self.x + xVel, self.y + self.yVelocity)
+
+	self:moveTo(self.x + xVel, self.y + yVel)
 end
 
 function Player:handleDischarge(state)
@@ -190,7 +203,7 @@ function Player:handleDischarge(state)
 	if Player.bat <= 0 then
 		Player.bat = 0
 		self.fallSpeed = 2
-		self:changeToDownState()
+		self.animation:setState("down")
 		return
 	end
 
@@ -198,6 +211,10 @@ function Player:handleDischarge(state)
 		self.fallSpeed = self.maxFallSpeed
 	end
 
+	if Player.bat < 3000 then
+		self.frictionAccel = 0.4
+	end
+
 	if state == "run" then
 		Player.dischargeRate = 5
 	elseif state == "up" then
@@ -216,7 +233,6 @@ end
 function Player:update()
 	self:handleMovementAndCollisions()
 	if Player.dead then
-		print("Player is dead")
 		return
 	end