bulleter.lua

Object = require "classic"

------
local Bullet = Object:extend()

function Bullet:new(x, y, velocity)
    self.x = x
    self.y = y

    -- Siempre debe ser un vector2 {x, y}
    self.velocity = velocity
end

function Bullet:update(dt)
    self.x = self.x + self.velocity.x * dt
    self.y = self.y + self.velocity.y * dt
end

function Bullet:draw()
    love.graphics.circle("line", self.x, self.y, 5)
end

-----
Bulleter = Object:extend()

function Bulleter:new(x, y, density, freq, speed)
    self.x = x or 0
    self.y = y or 0

    self.density = density or 10
    self.start = false
    self.freq = freq or 10
    self.speed = speed or 200

    self.rotation = 0
    self.angularSpeed = 0

    self.time = 0
    self.lastfire = 0

    self.bullets = {}
end

function Bulleter:rotate(dt, angularSpeed)
    self.rotation = self.rotation + angularSpeed * dt
end

function Bulleter:fire()
    local normal = (2*math.pi) / self.density
    for i = 1, self.density do
        local bullet = Bullet(self.x, self.y, {
            ['x'] = math.cos(i * normal + self.rotation) * self.speed,
            ['y'] = math.sin(i * normal + self.rotation) * self.speed 
        })
        table.insert(self.bullets, bullet)
    end
    print('Balas: ', #self.bullets)
end

function Bulleter:update(dt)
    self:rotate(dt, self.angularSpeed)

    self.time = self.time + dt
    if (self.time - self.lastfire) > self.freq then
        self:fire()
        self.lastfire = self.time
    end

    for i, bullet in ipairs(self.bullets) do
        if bullet.x < 0 or bullet.y < 0 or bullet.x > 800 or bullet.y > 600 then
            table.remove(self.bullets, i)
        end
        bullet:update(dt)
    end

end

function Bulleter:draw()
    for i, bullet in ipairs(self.bullets) do
        -- TODO: Borrar balas para que no explote la pc
        bullet:draw()
    end
    -- love.graphics.circle("fill", self.x, self.y, 40)
end

return Bulleter