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;;;; Copyright (C) 2018 Jakob L. Kreuze, All Rights Reserved.
;;;;
;;;; This file is part of slime-the-world.
;;;;
;;;; slime-the-world is free software: you can redistribute it and/or modify it
;;;; under the terms of the GNU General Public License as published by the Free
;;;; Software Foundation, either version 3 of the License, or (at your option)
;;;; any later version.
;;;;
;;;; slime-the-world is distributed in the hope that it will be useful, but
;;;; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;;;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
;;;; more details.
;;;;
;;;; You should have received a copy of the GNU General Public License along
;;;; with slime-the-world. If not, see <http://www.gnu.org/licenses/>.
(local draw (require :draw))
(local gravity 128)
(local slimeball-sheet
{:img (love.graphics.newImage "art/slimeball.png")
:width 16 :height 16
:padding-x 0 :padding-y 0})
(fn draw-slimeball [slimeball x y]
(draw.tile x y slimeball-sheet 0 0))
(fn update-slimeball [slimeball dt]
(tset slimeball :y-vel (+ (. slimeball :y-vel) (* gravity dt))))
(fn next-position [slimeball dt]
(values
(+ (. slimeball :x-pos) (* (. slimeball :x-vel) dt))
(+ (. slimeball :y-pos) (* (. slimeball :y-vel) dt))))
(fn new-slimeball [player]
(let [player-x (. player :x-pos)
player-y (. player :y-pos)
player-width (. player :width)
player-height (. player :height)
orientation (. player :orientation)]
{:is-slimeball true
:width (. slimeball-sheet :width)
:height (. slimeball-sheet :height)
:x-pos (if (= :right orientation)
(+ player-x player-width)
(- player-x player-width))
:y-pos player-y
:x-vel (if (= :right orientation) 128 (- 128))
:y-vel 0
:next-position next-position
:update update-slimeball
:draw draw-slimeball}))
{:new new-slimeball}
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