From: Lukas Krickl <lukas@krickl.dev>
Date: Thu, 10 Apr 2025 12:04:29 +0000 (+0200)
Subject: player: Added code to calculate cursor building offset when pressing a
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=8c24222c9d14efc060f81f96817f9961dc4d1b3a;p=gbrg%2F.git

player: Added code to calculate cursor building offset when pressing a
---

diff --git a/src/macros.inc b/src/macros.inc
index 8c80e81..4f82d8a 100644
--- a/src/macros.inc
+++ b/src/macros.inc
@@ -60,14 +60,13 @@
 
 
 
-  ; divides a regiser by 16
+  ; divides a regiser by 8 
   ; inputs:
   ;   $1: the register 
-#macro div16 
+#macro div8 
   srl $1 ; / 2
   srl $1 ; / 4
   srl $1 ; / 8
-  srl $1 ; / 16
 #endmacro 
 
   ; multiplies a regiser with 8 
diff --git a/src/player.s b/src/player.s
index 3330c89..39b8758 100644
--- a/src/player.s
+++ b/src/player.s
@@ -218,5 +218,33 @@ try_abort_move_at:
   ; at cursor_y/x 
   ; aborts if the tiel will not fit 
 cursor_place_tile:
+  ; find the cell the cursor has selected 
+  ld hl, state_cells
+
+  ; move y rows down
+  ld de, MAP_W * c_size
+  ld a, [cursor_y]
+  div8 a 
+  cp a, 0
+  jr z, @not_y_loop REL
+@y_loop:
+    add hl, de
+    dec a
+    cp a, 0
+    jr nz, @y_loop REL
+@not_y_loop:
+
+  ; move x cells 
+  ld de, c_size
+  ld a, [cursor_x]
+  div8 a
+  cp a, 0
+  jr z, @not_x_loop REL
+@x_loop:
+    add hl, de
+    dec a
+    cp a, 0
+    jr nz, @x_loop REL
+@not_x_loop:
 
   ret