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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:
;;
;; Main scene.
;;
;;; Code:
(define-module (lisparuga)
#:use-module ((chickadee) #:select (key-pressed?))
#:use-module (chickadee math rect)
#:use-module (chickadee math vector)
#:use-module (chickadee render color)
#:use-module (chickadee render texture)
#:use-module (ice-9 match)
#:use-module (lisparuga asset)
#:use-module (lisparuga config)
#:use-module (lisparuga game)
#:use-module (lisparuga kernel)
#:use-module (lisparuga node)
#:use-module (lisparuga node-2d)
#:use-module (lisparuga player)
#:use-module (lisparuga scene)
#:use-module (oop goops)
#:export (launch-lisparuga))
(define %framebuffer-width 320)
(define %framebuffer-height 240)
(define-asset background (load-image (scope-asset "images/background.png")))
(define-class <lisparuga> (<scene-2d>)
(state #:accessor state #:init-value 'init))
(define-method (game-over? (lisparuga <lisparuga>))
(game-over? (& lisparuga game)))
(define-method (complete? (lisparuga <lisparuga>))
(complete? (& lisparuga game)))
(define-method (on-boot (lisparuga <lisparuga>))
;; Scale a small framebuffer up to the window size.
(set! (views lisparuga)
(list (make <view-2d>
#:camera (make <camera-2d>
#:width %framebuffer-width
#:height %framebuffer-height)
#:area (let ((wc (window-config (current-kernel))))
(make-rect 0 0 (window-width wc) (window-height wc))))))
(attach-to lisparuga
(make <sprite>
#:name 'background
#:rank 0
#:texture background)
(make <game>
#:name 'game
#:rank 1
#:position (vec2 80.0 0.0))))
(define-method (on-enter (lisparuga <lisparuga>))
(new-game-transition lisparuga))
(define-method (new-game-transition lisparuga)
(set! (state lisparuga) 'play)
(let ((game-over (& lisparuga game-over)))
(and game-over (detach game-over)))
(reset (& lisparuga game))
(set! (state lisparuga) 'play)
(start-stage (& lisparuga game)))
(define-method (game-over-transition (lisparuga <lisparuga>))
(stop-stage (& lisparuga game))
(set! (state lisparuga) 'game-over)
(let ((game-over (make <node-2d>
#:name 'game-over
#:rank 999)))
(attach-to game-over
(make <label>
#:name 'game-over
#:text "GAME OVER"
#:position (vec2 160.0 120.0)
#:align 'center
#:vertical-align 'center)
(make <label>
#:name 'instructions
#:text "press ENTER to play again"
#:position (vec2 160.0 90.0)
#:align 'center))
(attach-to lisparuga game-over)))
(define-method (win-transition (lisparuga <lisparuga>))
(set! (state lisparuga) 'win))
(define-method (pause-transition (lisparuga <lisparuga>))
(set! (state lisparuga) 'pause)
(pause (& lisparuga game))
(let ((container (make <node-2d>
#:name 'pause
#:rank 999)))
(attach-to container
(make <filled-rect>
#:region (make-rect 80.0 0.0 160.0 240.0)
#:color (make-color 0.0 0.0 0.0 0.4))
(make <label>
#:name 'pause
#:rank 1
#:text "PAUSE"
#:position (vec2 160.0 120.0)
#:align 'center
#:vertical-align 'center))
(attach-to lisparuga container)))
(define-method (resume-transition (lisparuga <lisparuga>))
(set! (state lisparuga) 'play)
(detach (& lisparuga pause))
(resume (& lisparuga game))
(if (key-pressed? 'z)
(start-player-shooting (& lisparuga game))
(stop-player-shooting (& lisparuga game))))
(define-method (update (lisparuga <lisparuga>) dt)
(match (state lisparuga)
('play
(cond
((game-over? lisparuga)
(game-over-transition lisparuga))
((complete? lisparuga)
(win-transition lisparuga))
(else
(steer-player (& lisparuga game)
(key-pressed? 'up)
(key-pressed? 'down)
(key-pressed? 'left)
(key-pressed? 'right)))))
(_ #f)))
(define-method (on-key-press (lisparuga <lisparuga>) key scancode modifiers repeat?)
(match (state lisparuga)
('play
(match key
('z (start-player-shooting (& lisparuga game)))
('x (unless repeat?
(toggle-player-polarity (& lisparuga game))))
('c (unless repeat?
(fire-player-homing-missiles (& lisparuga game))))
('return (pause-transition lisparuga))
(_ #t)))
('pause
(match key
('return (resume-transition lisparuga))
(_ #t)))
((or 'win 'game-over)
(match key
('return (new-game-transition lisparuga))
(_ #f)))
(_ #f)))
(define-method (on-key-release (lisparuga <lisparuga>) key scancode modifiers)
(match (state lisparuga)
('play
(match key
('z (stop-player-shooting (& lisparuga game)))
(_ #t)))
(_ #f)))
(define* (launch-lisparuga #:key (window-width 640) (window-height 480))
(boot-kernel (make <kernel>
#:window-config (make <window-config>
#:title "lisparuga"
#:width window-width
#:height window-height))
(lambda () (make <lisparuga>))))
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