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;;; Lisparuga
;;; Copyright © 2020 David Thompson <dthompson2@worcester.edu>
;;;
;;; Lisparuga 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.
;;;
;;; Lisparuga 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 Lisparuga. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Game container. Handles all the state, logic, and rendering for
;; the game itself.
;;
;;; Code:
(define-module (lisparuga game)
#:use-module (chickadee math rect)
#:use-module (chickadee math vector)
#:use-module (chickadee render color)
#:use-module (chickadee render texture)
#:use-module (chickadee scripting)
#:use-module (ice-9 format)
#:use-module (lisparuga actor)
#:use-module (lisparuga asset)
#:use-module (lisparuga bullets)
#:use-module (lisparuga config)
#:use-module (lisparuga enemy)
#:use-module (lisparuga node)
#:use-module (lisparuga node-2d)
#:use-module (lisparuga player)
#:use-module (oop goops)
#:export (<game>
steer-player
start-player-shooting
stop-player-shooting
toggle-player-polarity
fire-player-homing-missiles))
(define-asset clouds (load-image (scope-asset "images/clouds.png")))
(define-asset player-bullet-atlas
(load-tile-atlas (scope-asset "images/player-bullets.png") 16 16))
(define-asset enemy-bullet-atlas
(load-tile-atlas (scope-asset "images/enemy-bullets.png") 24 24))
;; nodes needed:
;; scrolling background
(define-class <game> (<node-2d>))
(define-method (on-boot (game <game>))
(let* ((player-bullets (make <bullet-field>
#:name 'player-bullets
#:rank 2
#:capacity 500
#:texture-atlas player-bullet-atlas))
(player (make-player player-bullets))
(enemy-bullets (make <bullet-field>
#:name 'enemy-bullets
#:rank 4
#:capacity 1000
#:texture-atlas enemy-bullet-atlas))
(ui (make <node-2d>
#:name 'ui
#:rank 999)))
(set! (rank player) 1)
(attach-to game
(make <sprite>
#:name 'clouds
#:rank 0
#:texture clouds)
player
player-bullets
(make <node-2d>
#:name 'enemies
#:rank 3)
enemy-bullets
ui)
;; Setup UI elements
(attach-to ui
(make <label>
#:name 'score
#:position (vec2 2.0 226.0))
(make <label>
#:name 'chain
#:position (vec2 2.0 210.0))
(make <label>
#:name 'energy
#:position (vec2 2.0 18.0))
(make <label>
#:name 'lives
#:position (vec2 2.0 2.0)))
(update-ui game)
;; Test enemy
(spawn-enemy game (make-utatsugumi 'white 10.0 180.0))
(spawn-enemy game (make-utatsugumi 'white 30.0 180.0))
(spawn-enemy game (make-utatsugumi 'white 50.0 180.0))
(spawn-enemy game (make-utatsugumi 'black 70.0 180.0))
(spawn-enemy game (make-utatsugumi 'black 90.0 180.0))
(spawn-enemy game (make-utatsugumi 'black 110.0 180.0))
(spawn-enemy game (make-utatsugumi 'white 130.0 180.0))
(spawn-enemy game (make-utatsugumi 'white 150.0 180.0))))
(define (update-ui game)
(set! (text (& game ui score))
(format #f "~9,'0d" (score (& game player))))
(set! (text (& game ui chain))
(format #f "CHAIN ~a: ~a"
(let ((n (chain (& game player))))
(if (< n 9) (number->string n) "MAX"))
(list->string
(map (lambda (polarity)
(if (eq? polarity 'white)
#\W
#\B))
(chain-progress (& game player))))))
(set! (text (& game ui energy))
(format #f "E~d" (quotient (energy (& game player)) 10)))
(set! (text (& game ui lives))
(format #f "x~d" (max (- (lives (& game player)) 1) 0))))
(define-method (update (game <game>) dt)
(let ((refresh-ui? #f)
(player (& game player)))
;; enemy -> player bullet collision
;; enemy -> player collision
(for-each (lambda (enemy)
(cond
((and (collide (& game player-bullets) enemy)
(dead? enemy))
(on-kill player enemy)
(fire-parting-shots-maybe enemy player)
(detach enemy)
(set! refresh-ui? #t))
((collide player enemy)
(set! refresh-ui? #t))))
(children (& game enemies)))
;; player -> enemy bullet collision
(when (collide (& game enemy-bullets) (& game player))
(set! refresh-ui? #t))
(when refresh-ui?
(update-ui game))))
(define-method (spawn-enemy (game <game>) enemy)
(set! (bullet-field enemy) (& game enemy-bullets))
(attach-to (& game enemies) enemy))
(define-method (steer-player (game <game>) up? down? left? right?)
(steer (& game player) up? down? left? right?))
(define-method (start-player-shooting (game <game>))
(start-shooting (& game player)))
(define-method (stop-player-shooting (game <game>))
(stop-shooting (& game player)))
(define-method (toggle-player-polarity (game <game>))
(toggle-polarity (& game player)))
(define-method (fire-player-homing-missiles (game <game>))
(fire-homing-missiles (& game player) (children (& game enemies)))
(update-ui game))
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