From 9da5009cdcabdc162d84e43853439cee78467f23 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Thu, 19 Sep 2024 17:54:19 -0400
Subject: better collisions

---
 balls.h | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 balls.h

(limited to 'balls.h')

diff --git a/balls.h b/balls.h
new file mode 100644
index 0000000..0fa93a7
--- /dev/null
+++ b/balls.h
@@ -0,0 +1,34 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <cursor.h>
+
+enum {
+	RADIUS = 20,
+};
+
+typedef struct {
+	int x, y;
+} Vec;
+
+typedef struct {
+	Point p1, p2;
+} Line;
+
+typedef struct {
+	Point p; /* position */
+	Vec v; /* velocity */
+	int m; /* mass */
+} Ball;
+
+Vec vsub(Vec v1, Vec v2);
+Vec vmuls(Vec v, int a);
+Vec vdivs(Vec v, int a);
+int vdot(Vec v1, Vec v2);
+int vlen(Vec v);
+Vec unitnorm(Vec v);
+Point ptaddv(Point p, Vec v);
+Vec V(int x, int y);
+Vec Vpt(Point p, Point q);
+
+int iscollision(Point p, Point q);
\ No newline at end of file
-- 
cgit v1.2.3