1 files changed, 63 insertions, 0 deletions
diff --git a/point.cpp b/point.cpp
new file mode 100644
index 0000000..099165d
--- /dev/null
+++ b/point.cpp
@@ -0,0 +1,63 @@
+#include "balls.h"
+
+Point
+addPt(Point p, Point q) {
+	p.x += q.x;
+	p.y += q.y;
+	return p;
+}
+
+Point
+subPt(Point p, Point q) {
+	p.x -= q.x;
+	p.y -=q.y;
+	return p;
+}
+
+Point
+ptAddVec(Point p, Vector v) {
+	p.x += v.x;
+	p.y += v.y;
+	return p;
+}
+
+Point
+ptSubVec(Point p, Vector v) {
+	p.x -= v.x;
+	p.y -= v.y;
+	return p;
+}
+
+Point
+ptMulS(Point p, double s) {
+	p.x *= s;
+	p.y *= s;
+	return p;
+}
+
+Point
+ptDivS(Point p, double s) {
+	p.x /= s;
+	p.y /=s;
+	return p;
+}
+
+Point
+Pt(double x, double y) {
+	Point p = {x, y};
+	return p;
+}
+
+Rectangle
+insetRect(Rectangle r, double n) {
+	r.min.x += n;
+	r.min.y += n;
+	r.max.x -= n;
+	r.max.y -= n;
+	return r;
+}
+
+Point
+randPtInRect(Rectangle r) {
+	return Pt(randDouble(r.min.x, r.max.x), randDouble(r.min.y, r.max.y));
+}