58 lines
1.5 KiB
Lua
58 lines
1.5 KiB
Lua
---@class Projectile:GameObject
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---@field r number
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---@field s number|nil
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---@field v number|nil
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local Projectile = GameObject:extend()
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function Projectile:new(area, x, y, opts)
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Projectile.super.new(self, area, x, y, opts)
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-- radius of collider
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self.s = opts.s or 2.5
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-- velocity
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self.v = opts.v or 200
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self.collider = self.area.world:circle(self.x, self.y, self.s)
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end
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---Updates Projectile
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---@param dt number delta time
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function Projectile:update(dt)
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Projectile.super.update(self, dt)
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-- update velocity
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--self.v = math.min(self.v + self.a*dt, self.max_v)
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-- update position
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local vx = self.v * math.cos(self.r) -- velocity X
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local vy = self.v * math.sin(self.r) -- velocity Y
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self.x = self.x + vx * dt -- update position X
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self.y = self.y + vy * dt -- update position Y
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-- move collision area
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self.collider:moveTo(self.x, self.y)
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-- offscreen despawn
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if self.x < 0 then self:kill() end
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if self.y < 0 then self:kill() end
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if self.x > gw then self:kill() end
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if self.y > gh then self:kill() end
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end
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---Draws Projectile
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function Projectile:draw()
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Projectile.super.draw(self)
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if DEBUG then
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love.graphics.setColor(COLORS.collision)
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self.collider:draw()
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end
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love.graphics.setColor(COLORS.default)
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love.graphics.circle('fill', self.x, self.y, self.s)
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end
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---Kills Projectile
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function Projectile:kill()
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self.area:addGameObject('ProjectileDeathEffect', self.x, self.y, {w = self.s*3})
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self:destroy()
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end
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return Projectile
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