LÖVE

Code: Select all

Error

main.lua:43: Incorrect parameter type: expected userdata.


Traceback

[C]: in function 'getX'
main.lua:43: in function 'player_update'
main.lua:21: in function 'update'
[C]: in function 'xpcall'

Code: Select all

function love.load()
love.physics.setMeter(100)
	world = love.physics.newWorld(0,0,true)
	ship = love.graphics.newImage("ship.png")
	bullet = love.graphics.newImage("bullet.png")
	
	player = {}
		player.body = love.physics.newBody(world, love.graphics.getWidth()/2, love.graphics.getHeight()/2, "dynamic")
		player.shape = love.physics.newRectangleShape(34, 44)
		player.fixture = love.physics.newFixture(player.body, player.shape)
		player.accel = 75
		player.turnSpeed = 15
		player.direction = 0.5 * math.pi
	
	bullets = { }
end

function love.update(dt)
	world:update(dt)
	player_update(dt)
	bullets_update(dt)
end

function player_update(dt)
	--turning
	if love.keyboard.isDown("right") then
		player.direction = player.direction + (dt * player.turnSpeed)
	elseif love.keyboard.isDown("left") then
		player.direction = player.direction - (dt * player.turnSpeed)
	end
	
	--forward and back
	if love.keyboard.isDown("up") then
		player.body:applyForce(player.accel * -math.cos(player.direction), player.accel * -math.sin(player.direction))
	elseif love.keyboard.isDown("down") then
		player.body:applyForce(player.accel * math.cos(player.direction), player.accel * math.sin(player.direction))
	end
	
	--shoot bullets
	if love.keyboard.isDown(" ") then 
		table.insert(bullets, {})
			bullets[#bullets].body = love.physics.newBody(world, player.body.getX(), player.body.getY(), "dynamic")
			bullets[#bullets].shape = love.physics.newRectangleShape(5, 20)
			bullets[#bullets].fixture = love.physics.newFixture(bullets[#bullets].body, bullets[#bullets].shape)
			bullets[#bullets].speed = player.body:getLinearVelocity() + 100
			bullets[#bullets].direction = player.direction
	end
	
	--screen looping
	if player.body:getX() <0 then
		player.body:setPosition(love.graphics.getWidth(), player.body:getY())
	elseif player.body:getX() > love.graphics.getWidth() then
		player.body:setPosition(0, player.body:getY())
	end
	if player.body:getY() <0 then
		player.body:setPosition(love.graphics.getHeight(), player.body:getX())
	elseif player.body:getY() > love.graphics.getHeight() then
		player.body:setPosition(0, player.body:getX())
	end
end

--update bullets
function bullets_update(dt)
	for i, o in ipairs(bullets) do
		o.body:applyForce(o.speed + math.cos(o.direction), o.speed + math.sin(o.direction))
		--check for out of bounds
        if (o.x < -10) or (o.x > love.graphics.getWidth() + 10) or (o.y < -10) or (o.y > love.graphics.getHeight() + 10) then
            table.remove(bullets, i)
        end
    end
end

--draw everything on the screen;
function love.draw()
	love.graphics.draw(ship, player.body:getX(), player.body:getY(), player.direction - 0.5 * math.pi, 1, 1, 17, 22)
	for i, o in ipairs(bullets) do
		love.graphics.draw(bullet, o.body.getX(), o.body.getY(), o.direction - 0.5 * math.pi, 1, 1, 3, 3)
	end
end

Code: Select all

bullets[#bullets].body = love.physics.newBody(world, player.body.getX(), player.body.getY(), "dynamic")

Code: Select all

  bullets[#bullets].body = love.physics.newBody(world, player.body:getX(), player.body:getY(), "dynamic")