From 9cc20ff21f368e6f7466723d9b755833fe95aef1 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Mon, 23 Oct 2023 22:12:07 -0400
Subject: Misc updates...

---
 game.scm | 29 ++++++++++++++++++-----------
 1 file changed, 18 insertions(+), 11 deletions(-)

diff --git a/game.scm b/game.scm
index c0353a2..925562e 100644
--- a/game.scm
+++ b/game.scm
@@ -176,6 +176,9 @@
   (define (vec2-add! v w)
     (set-vec2-x! v (+ (vec2-x v) (vec2-x w)))
     (set-vec2-y! v (+ (vec2-y v) (vec2-y w))))
+  (define (vec2-sub! v w)
+    (set-vec2-x! v (- (vec2-x v) (vec2-x w)))
+    (set-vec2-y! v (- (vec2-y v) (vec2-y w))))
   (define (vec2-mul-scalar! v x)
     (set-vec2-x! v (* (vec2-x v) x))
     (set-vec2-y! v (* (vec2-y v) x)))
@@ -710,7 +713,7 @@
          (enemy-stop! (vector-ref enemies i))
          (vector-set! enemies i #f))
        (set-enemy-pool-length! pool 0))))
-  (define (enemy-pool-update! pool collide)
+  (define (enemy-pool-update! pool)
     (match pool
       (#('enemy-pool length capacity enemies)
        (let ((padding 16.0))
@@ -749,12 +752,14 @@
       (let ((speed 2.0))
         (let loop ((theta 0.0))
           (let ((dx (* (cos theta) speed))
-                (dy (* (sin theta) speed)))
+                (dy (* (sin theta) speed))
+                (v (direction-to-player (enemy-position enemy))))
             (bullet-pool-add! enemy-bullets 0
                               (enemy-x enemy)
                               (enemy-y enemy)
-                              dx dy))
-          (wait 2)
+                              (* (vec2-x v) speed)
+                              (* (vec2-y v) speed)))
+          (wait 30)
           (loop (+ theta 0.2)))))
     (let ((enemy (make-enemy 'foo 20 (vec2 x y) (vec2 16.0 16.0)
                              #t (vec2 0.0 0.0) script)))
@@ -763,7 +768,7 @@
   ;; Player state:
   (define player-position (vec2 (/ game-width 2.0) (- game-height 12.0)))
   (define player-velocity (vec2 0.0 0.0))
-  (define player-speed 4.0)
+  (define player-speed 2.9)
   (define player-bullet-speed 12.0)
   (define player-width 24.0)
   (define player-height 24.0)
@@ -871,6 +876,11 @@
                (vec2-y player-hitbox-position)
                player-hitbox-width
                player-hitbox-height))
+  (define (direction-to-player v)
+    (let ((v* (vec2 (vec2-x player-position) (vec2-y player-position))))
+      (vec2-sub! v* v)
+      (vec2-normalize! v*)
+      v*))
 
   (define *canvas-scale* 0.0)
   (define *canvas-width* 0)
@@ -904,11 +914,11 @@
   (define (draw-background image parallax)
     (let ((scroll (remainder (* *scroll* parallax) game-height)))
       ;; Bottom
-      (draw-image context image:background
+      (draw-image context image
                   0.0 0.0 game-width (- game-height scroll)
                   0.0 scroll game-width (- game-height scroll))
       ;; Top
-      (draw-image context image:background
+      (draw-image context image
                   0.0 (- game-height scroll) game-width scroll
                   0.0 0.0 game-width scroll)))
 
@@ -1006,9 +1016,6 @@
                 #t)
               #f))))
 
-  (define (enemy-collide x y w h hp)
-    hp)
-
   (define dt (/ 1000.0 60.0))
   (define (update)
     (scheduler-tick! *scheduler*)
@@ -1016,7 +1023,7 @@
     (player-update!)
     (bullet-pool-update! player-bullets player-bullet-collide)
     (bullet-pool-update! enemy-bullets enemy-bullet-collide)
-    (enemy-pool-update! enemies enemy-collide)
+    (enemy-pool-update! enemies)
     (timeout update dt))
 
   (add-event-listener! (current-window) "resize" (lambda (_) (resize-canvas)))
-- 
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