From 0c6d090ddb02bfd6840a1b40644ed98f6bd4cef7 Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Fri, 27 Feb 2026 08:28:27 +0100
Subject: [PATCH] math: Added point in rect tester. Added tests for tile to
 screen and point in rect.

---
 src/test.c         |  7 +++++--
 src/tests/t_math.c | 22 ++++++++++++++++++++++
 src/u_math.c       |  5 +++++
 src/u_math.h       |  7 +++++--
 4 files changed, 37 insertions(+), 4 deletions(-)
 create mode 100644 src/tests/t_math.c

diff --git a/src/test.c b/src/test.c
index 605d52e..842bad7 100644
--- a/src/test.c
+++ b/src/test.c
@@ -9,6 +9,7 @@
 #ifdef LRTS_IMPL 
 #include "tests/t_args.c"
 #include "tests/t_arena.c"
+#include "tests/t_math.c"
 #endif
 
 int main(int argc, char **argv) {
@@ -17,8 +18,10 @@ int main(int argc, char **argv) {
   T_TESTBEGIN("lrts test");
   lrts_getopt(argc, argv, lrts_cfg());
 	
-	T_TESTCASE("test-argv", t_test_argv);
-	T_TESTCASE("test-arena", t_test_arena);
+	T_TESTCASE("argv", t_test_argv);
+	T_TESTCASE("arena", t_test_arena);
+	T_TESTCASE("tile-to-screen", t_test_tile_to_screen);
+	T_TESTCASE("point-in-rect", t_test_pointinrect);
 
   T_TESTEND("lrts test");
 
diff --git a/src/tests/t_math.c b/src/tests/t_math.c
new file mode 100644
index 0000000..9772227
--- /dev/null
+++ b/src/tests/t_math.c
@@ -0,0 +1,22 @@
+#include "../u_arena.h"
+#include "t_defs.h"
+#include "../u_math.h"
+
+int t_test_pointinrect(void) {
+	T_ASSERT(u_point_in_rect(5, 5, 4, 2, 4, 5), ("point in rect\n"));
+	T_ASSERT(u_point_in_rect(1, 1, 4, 2, 4, 5) == LRTS_FALSE, ("point not in rect\n"));
+
+	return 0;
+}
+
+int t_test_tile_to_screen(void) {
+	struct u_vec2 res = u_tile_to_screen(0, 0);
+	T_ASSERT(res.x == 0 && res.y == 0, ("tile to screen %d/%d\n", res.x, res.y));
+
+	res = u_tile_to_screen(1, 1);
+	T_ASSERT(res.x == 96 && res.y == 0, ("tile to screen %d/%d\n", res.x, res.y));
+
+	res = u_tile_to_screen(1, 2);
+	T_ASSERT(res.x == 144 && res.y == 24, ("tile to screen %d/%d\n", res.x, res.y));
+	return 0;
+}
diff --git a/src/u_math.c b/src/u_math.c
index c661829..679ae44 100644
--- a/src/u_math.c
+++ b/src/u_math.c
@@ -63,3 +63,8 @@ struct u_vec2 u_tile_to_screen(i32 x, i32 y) {
 
 	return r;
 }
+
+lrts_bool u_point_in_rect(i32 x, i32 y, i32 rx, i32 ry, i32 rw, i32 rh) {
+	return x >= rx && x <= rx + rw
+			&& y >= ry && y <= ry + rh;
+}
diff --git a/src/u_math.h b/src/u_math.h
index b5838f4..4403907 100644
--- a/src/u_math.h
+++ b/src/u_math.h
@@ -6,6 +6,9 @@
 #define U_FP(n, f) {n, f}
 #define U_V2(x, y) {x, y}
 
+/* Clamps an integer value between min and max */
+#define U_CLAMP(v, min, max) if (v < min) { v = min; } if (v > max) { v = max; }
+
 /* fixed point number 
  * n: whole part
  * f: fractional part
@@ -48,7 +51,7 @@ struct u_vec2 u_vec2_mul(i32 n, struct u_vec2 v);
  */
 struct u_vec2 u_tile_to_screen(i32 x, i32 y);
 
-/* Clamps an integer value between min and max */
-#define U_CLAMP(v, min, max) if (v < min) { v = min; } if (v > max) { v = max; }
+/* tests if a point is contained inside a rectangle */
+lrts_bool u_point_in_rect(i32 x, i32 y, i32 rx, i32 ry, i32 rw, i32 rh);
 
 #endif
-- 
2.30.2