From: Lukas Krickl <lukas@krickl.dev>
Date: Sun, 25 May 2025 16:49:09 +0000 (+0200)
Subject: map: added unit_get_tile subroutine
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=0010453f61d6b895bcb395e6f749f799e22afd8f;p=gbrg%2F.git

map: added unit_get_tile subroutine

This commit also reverts some of the map script changes made in the last
commit
---

diff --git a/maps/default_map.s b/maps/default_map.s
index 159c23c..0276542 100644
--- a/maps/default_map.s
+++ b/maps/default_map.s
@@ -1,7 +1,6 @@
 default_map_header:
 .db 0, 0, 0, 0 ; flags
 dw default_map_bg
-dw default_map_tile_flags
 
 default_map_bg:
 
@@ -101,260 +100,3 @@ default_map_bg:
 .db 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0
 .db 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0
 .db 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x64,0x0, 0x65,0x0
-default_map_tile_flags:
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
-.db  0x0
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-.db  0x1
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-.db  0x1
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-.db  0x1
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diff --git a/src/defs.s b/src/defs.s
index 9f97348..e146d1a 100644
--- a/src/defs.s
+++ b/src/defs.s
@@ -158,4 +158,3 @@
 .de map_flags_3, 1
 .de map_flags_4, 1
 .de map_bg_ptr, 2
-.de map_tile_flags_ptr, 2
diff --git a/src/map.s b/src/map.s
index 43a9503..58bce1e 100644
--- a/src/map.s
+++ b/src/map.s
@@ -7,7 +7,35 @@ map_init:
   call cells_draw_all
 
   ret
- 
+
+  ; gets the tile at a y/x position
+  ; inputs:
+  ;   b/c: y/x tile position
+  ; returns:
+  ;   a: tile
+  ;   b: flags
+map_get_tile:
+  ; current map
+  ld hl, state_cells
+  ld d, 0
+  ld e, MAP_W * c_size
+
+  ; calculate y offset 
+@y_loop:
+    add hl, de
+    dec b
+  jr nz, @y_loop REL
+
+  ; add x offset 
+  ld e, c
+  ; add x offset c_size times
+.rep i, c_size, 1, add hl, de
+  
+  ; load values 
+
+
+  ret
+
  ; loads a map 
  ; inputs:
  ;    hl: map header
diff --git a/src/unit.s b/src/unit.s
index 551c6c0..d3f6030 100644
--- a/src/unit.s
+++ b/src/unit.s
@@ -621,6 +621,22 @@ unit_resume_objs:
   ld [draw_flags], a
   ret
 
+
+  ; gets the tile value at the current unit's position
+  ; inputs:
+  ;   de: unit
+  ; returns:
+  ;   a: flags 
+  ;   b: tile index 
+unit_get_tile:
+  ld hl, act_pos_y 
+  add hl, de ; hl = pos y
+  ld a, [hl+]
+  ld b, a ; b = y
+  ld a, [hl]
+  ld c, a ; c = x
+  jp map_get_tile
+
 unit_demo_1:
   st_def 0x00, unit_demo_1_init, st_unit_idle
   act_def ACT_T_DEMO_1, 0, 2, 2, 0
diff --git a/tools/tms2map.py b/tools/tms2map.py
index 2ef434b..9f4f4b6 100755
--- a/tools/tms2map.py
+++ b/tools/tms2map.py
@@ -51,7 +51,6 @@ def print_header(name):
     print(name + "_header:")
     print(".db 0, 0, 0, 0 ; flags")
     print("dw " + name + "_bg")
-    print("dw " + name + "_tile_flags")
     print("")
     
 def get_flag(tile):
@@ -69,11 +68,6 @@ def get_flags(tileset):
         if child.tag == 'tile':
             get_flag(child)
 
-def print_tile_flags(name):
-    print(name + "_tile_flags:");
-    for flag in TILE_FLAGS:
-        print(".db ", hex(int(flag)));
-
 def convert(src, name):
     tree = ET.parse(src)
     root = tree.getroot()
@@ -87,6 +81,4 @@ def convert(src, name):
         elif child.tag == "tileset":
             get_flags(child)
 
-    print_tile_flags(name)
-
 convert(src, name)