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local Entity = require("entity")
local Animation = require("animation")
local Player = {}
Player.__index = Player
setmetatable(Player, { __index = Entity })
local MOVE_SPEED = 65
local SWIM_SPEED = 15
local JUMP_FORCE = -200
local GROUND_LAYER = "ground"
function Player.new(world, spawnX, spawnY)
local w, h = 16, 16
local pw, ph = 8, 8 -- physics body size
local self = setmetatable(Entity:new(spawnX or 0, spawnY or 0, w, h, pw, ph), Player)
self.directionState = { 'side', 'up', 'down', 'side_up', 'side_down' }
self.directionIndex = 1
self.direction = self.directionState[self.directionIndex]
self.availableJumps = 0
self:enablePhysics(world, "dynamic")
self.fixture:setFriction(0)
self.doubleJump = true
self.jumpsUsed = 0
self.animations = {
idle = Animation.new("assets/player/idle.png", 16, 16, 0.6),
running = Animation.new("assets/player/running.png", 16, 16, 0.9),
going_up = Animation.new("assets/player/going_up.png", 16, 16, 0.8),
going_down = Animation.new("assets/player/going_down.png", 16, 16, 0.5),
stop_running = Animation.new("assets/player/stop_running.png", 16, 16, 0.3),
ground_hit = Animation.new("assets/player/ground_hit.png", 16, 16, 0.3)
}
if love and love.filesystem and love.filesystem.getDirectoryItems then
local ok, items = pcall(love.filesystem.getDirectoryItems, "assets/player")
if ok and items then
for _, filename in ipairs(items) do
if filename:match("%.png$") then
local name = filename:gsub("%.png$", "")
if not self.animations[name] then
self.animations[name] = Animation.new("assets/player/" .. filename, 16, 16, 0.3)
end
end
end
end
end
self.animations.ground_hit.looping = false
self.animations.stop_running.looping = false
self.currentAnim = self.animations.idle
self.lastFacing = 1
self.state = "idle"
self.wasOnFloor = false
self.vx = 0
self.vy = 0
self.grounded = false
self.isInLiquid = false
self.wasInLiquid = false
self.waterSurfaceContact = false
return self
end
function Player:trackDirectionByKeyPressed()
local left = love.keyboard.isDown("left", "a")
local right = love.keyboard.isDown("right", "d")
local up = love.keyboard.isDown("up", "w")
local down = love.keyboard.isDown("down", "s")
if up and left then
self.directionIndex = 4
elseif up and right then
self.directionIndex = 4
elseif down and left then
self.directionIndex = 5
elseif down and right then
self.directionIndex = 5
elseif up then
self.directionIndex = 2
elseif down then
self.directionIndex = 3
elseif left then
self.directionIndex = 1
elseif right then
self.directionIndex = 1
end
self.direction = self.directionState[self.directionIndex]
end
function Player:update(dt)
self:syncFromPhysicsBody()
self:trackDirectionByKeyPressed()
local vx, vy = self.body:getLinearVelocity()
self.vx = vx
self.vy = vy
local c = self.contact or { floor = 0, wall = 0, ceiling = 0 }
local onFloor = c.floor == 1
local onWaterSurface = self.waterSurfaceContact
local prevOnFloor = self.wasOnFloor
local prevState = self.state
local move = 0
if love.keyboard.isDown("left", "a") then move = move - 1 end
if love.keyboard.isDown("right", "d") then move = move + 1 end
if self.isInLiquid then
local vx, vy = self.body:getLinearVelocity()
local mass = self.body:getMass()
local gx, gy = self.body:getWorld():getGravity()
if not self.wasInLiquid then
vx = vx * 0.4
vy = math.min(vy, 60)
self.body:setLinearVelocity(vx, vy)
end
self.body:setLinearDamping(6)
local buoyancy = 0.9
self.body:applyForce(0, -gy * mass * buoyancy)
local moveY = 0
if love.keyboard.isDown("up", "w") then moveY = moveY - 1 end
if love.keyboard.isDown("down", "s") then moveY = moveY + 1 end
local inputLen = math.sqrt(move * move + moveY * moveY)
if inputLen > 1 then
move = move / inputLen
moveY = moveY / inputLen
end
self.body:applyForce(move * SWIM_SPEED, moveY * SWIM_SPEED)
elseif onFloor or onWaterSurface then
self.body:setLinearDamping(0)
self.jumpsUsed = 0
if move ~= 0 then
self.lastFacing = move
self.body:setLinearVelocity(move * MOVE_SPEED, vy)
else
self.body:setLinearVelocity(0, vy)
end
else
self.body:setLinearDamping(0)
if move ~= 0 then self.lastFacing = move end
self.body:setLinearVelocity(move * MOVE_SPEED * 0.7, vy)
end
local desiredState
if self.isInLiquid then
desiredState = "swimming"
elseif onFloor then
desiredState = (move ~= 0) and "running" or "idle"
else
desiredState = (vy < 0) and "jumping" or "falling"
end
if self.isInLiquid then
self.state = desiredState
elseif self.state == "ground_hit" or self.state == "stop_running" then
if not onFloor or self.currentAnim:isFinished() then
self.state = desiredState
end
else
local wasAirborne = prevState == "jumping" or prevState == "falling"
if onFloor and not prevOnFloor and wasAirborne then
self.state = "ground_hit"
self.animations.ground_hit:reset()
elseif onFloor and prevState == "running" and move == 0 then
self.state = "stop_running"
self.animations.stop_running:reset()
else
self.state = desiredState
end
end
self.wasOnFloor = onFloor
self.wasInLiquid = self.isInLiquid
local animMap = {
idle = self.animations.idle,
running = self.animations.running,
jumping = self.animations.going_up,
falling = self.animations.going_down,
swimming = self.animations.going_down,
stop_running = self.animations.stop_running,
ground_hit = self.animations.ground_hit,
}
self.currentAnim = animMap[self.state] or self.animations.idle
self.currentAnim:update(dt)
end
function Player:jump()
local c = self.contact or { floor = 0, wall = 0, ceiling = 0 }
local onFloor = c.floor == 1
local onWall = c.wall == 1
local onWaterSurface = self.waterSurfaceContact
if onWall and not onFloor then
return false
end
local maxJumps = self.doubleJump and 2 or 1
if self.jumpsUsed >= maxJumps then
return false
end
if self.isInLiquid and not onWaterSurface then
return false
end
self.body:setLinearVelocity(self.body:getLinearVelocity(), JUMP_FORCE)
self.state = "jumping"
self.animations.going_up:reset()
self.jumpsUsed = self.jumpsUsed + 1
return true
end
function Player:draw()
local flip = (self.lastFacing < 0)
self.currentAnim:draw(self.x, self.y, flip)
end
function Player:getBody()
return self.body
end
return Player
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