From 5f6bc505239b1dbc5afdb096490c57d887c416eb Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Fri, 26 Sep 2025 08:48:28 +0200
Subject: [PATCH] actor: added temporary pre-calculation for rectangle points

---
 src/actor.s | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/wram.s  |  5 +++++
 2 files changed, 62 insertions(+)

diff --git a/src/actor.s b/src/actor.s
index 9f8545d..aa7fad3 100644
--- a/src/actor.s
+++ b/src/actor.s
@@ -210,6 +210,8 @@ actor_test_movement:
 
 	ld a, b
 	ld [tmp_act_direction], a
+	; a = direction
+	call actor_test_movement_write_points
 
 	; check all static rectangles
 	ld hl, rectangles
@@ -277,6 +279,61 @@ actor_test_movement:
 	; hl = actor already 
 	ld a, 1
 	ret
+	
+	; writes a point to a rectangle
+	; inputs:
+	;		hl: rectangle
+	;		bc: tmp_rect_points ptr
+	;		$1 rect_tr,bl,br,tl
+#macro act_test_movement_write_point_at
+	push hl
+	push bc
+	call $1
+	pop bc
+	pop hl
+
+	ld a, d
+	ld [bc], a
+	inc bc
+	ld a, e
+	ld [bc], a
+	inc bc
+#endmacro
+
+	; writes tmp rect points to 
+	; tmp_rect_points. only writes 2 points 
+	; based on the chosen direction
+	; inputs:
+	;		a: direction
+	;		tmp_rect: the rectangle
+actor_test_movement_write_points:
+	ld hl, tmp_rect
+	ld bc, tmp_rect_points
+
+	cp a, DIRDOWN
+	jp z, @down
+	cp a, DIRLEFT
+	jp z, @left
+	cp a, DIRRIGHT
+	jp z, @right
+	
+	; default case: up
+@up:
+	act_test_movement_write_point_at rect_tl
+	act_test_movement_write_point_at rect_tr
+	ret
+@down:
+	act_test_movement_write_point_at rect_bl 
+	act_test_movement_write_point_at rect_br 
+	ret
+@right:
+	act_test_movement_write_point_at rect_br 
+	act_test_movement_write_point_at rect_tr 
+	ret
+@left:
+	act_test_movement_write_point_at rect_bl 
+	act_test_movement_write_point_at rect_tl 
+	ret
 
 	; tests a single rectangle against an actor 
 	; based on the current direction only 2 points are tested
diff --git a/src/wram.s b/src/wram.s
index 41420f9..5ba82e9 100644
--- a/src/wram.s
+++ b/src/wram.s
@@ -84,6 +84,11 @@ rectangles: .adv r_size * RECT_MAX
 tmp_rect: .adv r_size
 tmp_rect_mask: .adv 1
 	
+	; temporary points 
+	; has enough space for 4 points
+	; store pre-calculated points here for collision checking
+tmp_rect_points: .adv 4 * 2
+	
 	; temporary actor direction mask
 tmp_act_direction: .adv 1
 
-- 
2.30.2