From e2da734dcd95dcfaec151df68f60bb02d4169602 Mon Sep 17 00:00:00 2001
From: Katajisto <t@ktj.st>
Date: Mon, 3 Nov 2025 22:03:47 +0200
Subject: [PATCH] add some collider logic

---
 mise.toml                       |  2 +-
 src/main.jai                    |  1 +
 src/pseudophysics/colliders.jai | 27 +++++++++++++++++++++++++++
 src/pseudophysics/core.jai      |  1 +
 4 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 src/pseudophysics/colliders.jai
 create mode 100644 src/pseudophysics/core.jai

diff --git a/mise.toml b/mise.toml
index b2df8e7..6943e20 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,4 +1,4 @@
 [tasks]
 build_web = "$HOME/bin/jai/bin/jai-linux first.jai - wasm release && rm -rf dist/packs/ && cp -r packs/ dist/ && rm dist/main.o"
 ship_web  = "./game/ship_web.sh"
-run       = "$HOME/bin/jai/bin/jai-linux first.jai && ./first"
+start       = "$HOME/bin/jai/bin/jai-linux first.jai && ./first"
diff --git a/src/main.jai b/src/main.jai
index 70c84fe..785496a 100644
--- a/src/main.jai
+++ b/src/main.jai
@@ -15,6 +15,7 @@ String :: #import "String";
 Jaison :: #import "Jaison";
 stbi   :: #import "stb_image";
 
+#load "pseudophysics/core.jai";
 #load "trile.jai";
 #load "rendering/rendering.jai";
 #load "input/hotkeys.jai";
diff --git a/src/pseudophysics/colliders.jai b/src/pseudophysics/colliders.jai
new file mode 100644
index 0000000..f0c372d
--- /dev/null
+++ b/src/pseudophysics/colliders.jai
@@ -0,0 +1,27 @@
+Collision_Rect :: struct {
+    width  : float;
+    height : float;
+    position : Vector2;
+}
+
+Collision_Circle :: struct {
+    radius : float;
+    position : Vector2;
+}
+
+Collision_Result :: struct {
+    hit            : bool;
+    collisionDepth : float;
+}
+
+check_collision :: (rect: Collision_Rect, circle: Collision_Circle) -> Collision_Result {
+    closestX := max(rect.position.x - (rect.width / 2.0), min(circle.position.x, rect.position.x + (rect.width / 2.0)));
+    closestY := max(rect.position.y - (rect.height / 2.0), min(circle.position.y, rect.position.y + (rect.height / 2.0)));
+    distanceX := circle.position.x - closestX;
+    distanceY := circle.position.y - closestY;
+    distanceSquared := (distanceX * distanceX) + (distanceY*distanceY);
+    radiusSquared := circle.radius * circle.radius;
+    return Collision_Result.{
+        hit = distanceSquared <= radiusSquared
+    };
+}
diff --git a/src/pseudophysics/core.jai b/src/pseudophysics/core.jai
new file mode 100644
index 0000000..cadd0b1
--- /dev/null
+++ b/src/pseudophysics/core.jai
@@ -0,0 +1 @@
+#load "colliders.jai";