Remove the pool size from enemies

It was never read anyways, so let's drop it.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>

3 files changed, 2 insertions, 16 deletions

diff --git a/.nasm/memory.txt b/.nasm/memory.txt
index 2d3e869..c47526d 100644
--- a/.nasm/memory.txt
+++ b/.nasm/memory.txt
@@ -39,7 +39,6 @@ $80: zp_control
 $81: zp_mask
 $A0-$BD: zp_bullets_pool_base
 $CF: zp_player_tile_bottom
-$D0: zp_enemies_pool_size
 $D1: zp_enemy_tiles
 $D2-$D3: zp_enemy_movement_fn
 $D4: zp_pool_index
@@ -68,4 +67,4 @@ $4016: m_joypad1
 $4017: m_frame_counter
 
 --- Summary (in bytes) ---
-- Internal RAM: 378/2048 (18.46%)
+- Internal RAM: 377/2048 (18.41%)
diff --git a/.nasm/segments.txt b/.nasm/segments.txt
index f09827a..2367e2f 100644
--- a/.nasm/segments.txt
+++ b/.nasm/segments.txt
@@ -1,4 +1,4 @@
 - HEADER: 16/16 (100%)
-- ROM0: 6454/32762 (19.70%)
+- ROM0: 6448/32762 (19.68%)
 - ROMV: 6/6 (100%)
 - ROM2: 8192/8192 (100%)
diff --git a/src/enemies.s b/src/enemies.s
index 64b9545..facb255 100644
--- a/src/enemies.s
+++ b/src/enemies.s
@@ -50,10 +50,6 @@
     ;;  4. 'extra' state: depends on the enemy type.
     zp_enemies_pool_base = $60  ; asan:reserve ENEMIES_POOL_CAPACITY_BYTES
 
-    ;; The current size of active enemies. That is, one thing is the capacity of
-    ;; the pool, and another is what's the number of enemies on screen.
-    zp_enemies_pool_size = $D0
-
     ;; Base index of the enemy tiles in 'tiles' to be used. Whether to use one
     ;; row or the other for a given enemy is to be decided by its current state.
     zp_enemy_tiles = $D1
@@ -168,15 +164,9 @@
     ;; Initializes the enemy pool for this game.
     .proc init_pool
         ldx #0
-
-        ;; The initial size of the pool is its whole capacity.
         ldy #ENEMIES_POOL_CAPACITY
-        sty zp_enemies_pool_size
-
     @enemies_init_loop:
         jsr init_enemy_x
-
-        ;; Next enemy!
         dey
         bne @enemies_init_loop
 
@@ -327,7 +317,6 @@
 
         ;; Initialize the slot as a new 'valid' enemy.
         jsr init_enemy_x
-        inc Enemies::zp_enemies_pool_size
 
         ;; The above 'init_enemy_x' call already updates the 'x' register to the
         ;; next enemy. Jump to '@next', not '@increase_index_next'.
@@ -625,8 +614,6 @@
 
     ;; The enemy has been set to dust, remove it.
     .proc bite_the_dust
-        dec Enemies::zp_enemies_pool_size
-
         ;; Invalidate this enemy.
         lda #$FF
         ldx Enemies::zp_pool_index