-(set-game-properties! #:title "Gacela Asteroids")
-
-(define max-x (/ (assoc-ref (get-game-properties) 'width) 2))
-(define min-x (- max-x))
-(define max-y (/ (assoc-ref (get-game-properties) 'height) 2))
-(define min-y (- max-y))
-
-(define (update-asteroid! a #:key x y angle vx vy)
- (cond (x (assoc-set! a 'x x)))
- (cond (y (assoc-set! a 'y y)))
- (cond (x (assoc-set! a 'x x)))
- (cond (x (assoc-set! a 'x x)))
- (cond (x (assoc-set! a 'x x)))
-
-(define draw-asteroid
- (let ((asteroid (load-texture "Asteroid.png")))
- (lambda (a)
- (to-origin)
- (translate (assoc-ref a 'x) (assoc-ref a 'y))
- (rotate (assoc-ref a 'angle))
- (draw-texture asteroid))))
-
-(define (move-asteroid a)
- (let* ((x (assoc-ref a 'x)) (y (assoc-ref a 'y))
- (angle (assoc-ref a 'angle))
- (vx (assoc-ref a 'vx)) (vy (assoc-ref a 'vy)))
- (set! x (+ x vx))
- (set! y (+ y vy))
- (cond ((> x max-x) (set! vx -1))
- ((< x min-x) (set! vx 1)))
- (cond ((> y max-y) (set! vy -1))
- ((< y min-y) (set! vy 1)))
-
- (assoc-set! a 'x x)
- (assoc-set! a 'y y)
- (assoc-set! a 'angle (+ angle 1))
- (assoc-set! a 'vx vx)
- (assoc-set! a 'vy vy)
- a))
-
-(define draw-ship
- (let ((ship1 (load-texture "Ship1.png"))
- (ship2 (load-texture "Ship2.png")))
- (lambda (s)
- (to-origin)
- (translate (assoc-ref s 'x) (assoc-ref s 'y))
- (rotate (assoc-ref s 'angle))
- (let ((ship (if (assoc-ref s 'moving) ship2 ship1)))
- (draw-texture ship)))))
-
-(define (move-ship s)
- (let ((x (assoc-ref s 'x)) (y (assoc-ref s 'y))
- (angle (assoc-ref s 'angle))
- (moving (assoc-ref s 'moving)))
- (cond ((key? 'left) (set! angle (+ angle 5)))
- ((key? 'right) (set! angle (- angle 5))))
- (cond ((key? 'up)
- (let ((r (degrees-to-radians (- angle))))
- (set! x (+ x (* 4 (sin r))))
- (set! y (+ y (* 4 (cos r)))))
- (cond ((> x max-x) (set! x min-x))
- ((< x min-x) (set! x max-x)))
- (cond ((> y max-y) (set! y min-y))
- ((< y min-y) (set! y max-y)))
- (set! moving #t))
- (else
- (set! moving #f)))
-
- (assoc-set! s 'x x)
- (assoc-set! s 'y y)
- `((x . ,x) (y . ,y) (angle . ,angle) (moving . ,moving))))
-
-(define (ship-shot s)
- (cond ((key-pressed? 'space)
- `((x . ,(assoc-ref s 'x)) (y . ,(assoc-ref s 'y)) (angle . ,(assoc-ref s 'angle))))
- (else
- #f)))
-
-(define (draw-shot sh)
- (to-origin)
- (translate (assoc-ref sh 'x) (assoc-ref sh 'y))
- (rotate (assoc-ref sh 'angle))
- (draw-line 10))
-
-(define (move-shots shots)
- (cond ((null? shots) '())
- (else
- (let* ((sh (car shots))
- (x (assoc-ref sh 'x)) (y (assoc-ref sh 'y))
- (angle (assoc-ref sh 'angle))
- (r (degrees-to-radians (- angle))))
- (set! x (+ x (* 10 (sin r))))
- (set! y (+ y (* 10 (cos r))))
- (cond ((and (<= x max-x)
- (>= x min-x)
- (<= y max-y)
- (>= y min-y))
- (cons `((x . ,x) (y . ,y) (angle . ,angle))
- (move-shots (cdr shots))))
- (else
- (move-shots (cdr shots))))))))
-
-(define (make-asteroids n)
- (define (xy n r)
- (let ((n2 (- (random (* n 2)) n)))
- (cond ((and (< n2 r) (>= n2 0)) r)
- ((and (> n2 (- r)) (< n2 0)) (- r))
- (else n2))))
-
- (cond ((= n 0) '())
- (else
- (cons `((x . ,(xy max-x 20)) (y . ,(xy max-y 20)) (angle . 0) (vx . 1) (vy . 1)) (make-asteroids (- n 1))))))
-
-(define (killed-ship? ship asteroids)
- #f)
-
-(let ((asteroids #f) (ship #f) (shots #f))
- (define (new-game n)
- (set! asteroids (make-asteroids n))
- (set! ship '((x . 0) (y . 0) (angle . 0) (moving . #f)))
- (set! shots '()))
-
- (new-game 2)
-
- (run-game
- (cond ((killed-ship? ship asteroids)
- (new-game 2)))
- (set! asteroids (map move-asteroid asteroids))
- (set! ship (move-ship ship))
- (let ((shot (ship-shot ship)))
- (cond (shot
- (set! shots (cons shot shots)))))
- (set! shots (move-shots shots))
- (for-each draw-asteroid asteroids)
- (for-each draw-shot shots)
- (draw-ship ship)))
+;;; Gacela, a GNU Guile extension for fast games development
+;;; Copyright (C) 2014 by Javier Sancho Fernandez <jsf at jsancho dot org>
+;;;
+;;; This program 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.
+;;;
+;;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+(define-module (gacela examples asteroids))
+; #:use-module (gacela game))
+
+
+(define asteroids (game "Asteroids"))
+(define player (entity))
+(set! player (add-component player (name "player")))
+(set! player (add-component player (transform)))
+(set! player (add-component player (mesh)))
+(set! asteroids (add-entity asteroids player))
+(define rock (entity))
+(set! rock (add-component rock (name "rock")))
+(set! rock (add-component rock (transform)))
+(set! rock (add-component rock (mesh)))
+(set! asteroids (add-entity asteroids rock))
+
+
+(define asteroids
+ (game "Asteroids"
+ (entity
+ (name "player")
+ (transform)
+ (mesh))
+ (entity
+ (name "rock")
+ (transform)
+ (mesh))))
projects / gacela.git / blobdiff