1 files changed, 23 insertions, 0 deletions

diff --git a/balls.h b/balls.h
new file mode 100644
index 0000000..3205959
--- /dev/null
+++ b/balls.h
@@ -0,0 +1,23 @@
+typedef struct {
+	double x, y;
+} Point;
+
+typedef struct {
+	Point min, max;
+} Rectangle;
+
+typedef struct {
+	double x, y;
+} Vector;
+
+typedef struct {
+	Point p; /* position [m] */
+	Vector v; /* velocity [m/s] */
+	double m; /* mass [kg] */
+	double r; /* radius [m] */
+} Ball;
+
+Point ptAddVec(Point p, Vector v);
+Rectangle insetRect(Rectangle r, double n);
+
+void collideWall(Ball *b, Rectangle wall);
\ No newline at end of file