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;;; Lisparuga
;;; Copyright © 2016 David Thompson <davet@gnu.org>
;;;
;;; 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/>.
(define-module (lisparuga view)
#:use-module (ice-9 match)
#:use-module (sly actor)
#:use-module (sly live-reload)
#:use-module (sly math rect)
#:use-module (sly math vector)
#:use-module (sly render)
#:use-module (sly render camera)
#:use-module (sly render color)
#:use-module (sly render font)
#:use-module (sly render sprite)
#:use-module (sly render sprite-batch)
#:use-module (sly render tileset)
#:use-module (sly signal)
#:use-module (sly utils)
#:use-module (lisparuga bullets)
#:use-module (lisparuga config)
#:use-module (lisparuga enemies)
#:use-module (lisparuga explosions)
#:use-module (lisparuga player)
#:use-module (lisparuga stats)
#:use-module (lisparuga world)
#:use-module (lisparuga utils)
#:export (resolution-scale
scaled-resolution
camera
scaled-camera
font-color
load-font*
render-status-text
load-sprite/live
load-tileset/live
make-chain-sprite
make-scrolling-background
render-sprite-maybe
render-bullets
render-enemies
render-player
render-explosions))
(define resolution-scale 4)
(define scaled-resolution (v* resolution resolution-scale))
(define camera
(2d-camera #:area (make-rect 0 0 (vx resolution) (vy resolution))))
(define scaled-camera
(2d-camera #:area (make-rect 0 0
(vx scaled-resolution)
(vy scaled-resolution))))
(define font-color (rgb #xdeeed6))
(define (load-font* file size)
(load-font (string-append %datadir "/fonts/" file) size))
(define render-status-text
(memoize
(lambda (font text)
(render-sprite
(make-label font text #:blended? #f #:anchor 'center)))))
(define (load-sprite* file . keyword-args)
(apply load-sprite
(string-append %datadir "/images/" file)
keyword-args))
(define (load-tileset* file width height)
(load-tileset (string-append %datadir "/images/" file)
width height))
(define load-sprite/live (with-live-reload load-sprite*))
(define load-tileset/live (with-live-reload load-tileset*))
(define make-chain-sprite
(memoize
(lambda (tileset stats)
(make-sprite (tileset-ref tileset
(- (match (stats-chain-type stats)
('light 2)
('dark 5))
(1- (stats-chain-progress stats))))
#:anchor 'top-left))))
(define (make-scrolling-background background timer speed)
(signal-let ((background background)
(time timer))
(if background
(let* ((height (vy resolution))
(y (- (* (modulo time (round (/ height speed))) speed)))
(render (render-sprite background)))
(render-begin
(move (vector2 0 y) render)
(move (vector2 0 (+ y height)) render)))
render-nothing)))
(define (render-sprite-maybe sprite)
(signal-map (lambda (sprite)
(if sprite
(render-sprite sprite)
render-nothing))
sprite))
(define bullet-rect (make-rect -8 -8 16 16))
(define enemy-rect (make-rect -8 -8 16 16))
(define explosion-rect (make-rect -8 -8 16 16))
(define (render-bullets bullets tileset batch)
(lambda (context)
(with-sprite-batch batch context
(for-each (lambda (actor)
(let* ((bullet (actor-ref actor))
(rect (rect-move bullet-rect
(bullet-position bullet)))
(tex (tileset-ref tileset
(match (bullet-type bullet)
('player-light 12)
('player-dark 13)
('large-light 9)
('large-dark 8)
('small-light 11)
('small-dark 10)))))
(sprite-batch-add! batch context tex rect)))
bullets))))
(define (render-enemies enemies tileset batch time)
(lambda (context)
(with-sprite-batch batch context
(for-each (lambda (actor)
(let* ((enemy (actor-ref actor))
(hit-time (enemy-last-hit-time enemy))
(hit? (and hit-time (zero? (- time hit-time))))
(rect (rect-move enemy-rect (enemy-position enemy)))
(tex (tileset-ref tileset
(+ (match (enemy-type enemy)
('popcorn-dark 0)
('popcorn-light 4)
('pincer-dark 8)
('pincer-light 12))
(if hit?
;; Use the hit
;; indicator frame.
2
;; Swap between the
;; 2 normal
;; animation frames.
(modulo (round (/ time 5))
2))))))
(sprite-batch-add! batch context tex rect)))
enemies))))
(define (render-player player sprite time)
(if (and (player-invincible? player time)
(odd? (round (/ time 3))))
render-nothing
(move (player-position player)
(render-sprite sprite))))
(define (render-explosions explosions tileset batch time)
(lambda (context)
(with-sprite-batch batch context
(for-each (lambda (explosion)
(let* ((start-time (explosion-time explosion))
(rect (rect-move explosion-rect
(explosion-position explosion)))
;; 3 frames of animation.
(frame (min 2 (floor (/ (- time start-time) 5))))
(tex (tileset-ref tileset frame)))
(sprite-batch-add! batch context tex rect)))
explosions))))
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