diff --git a/vectorpoint.go b/vectorpoint.go
index da29fa1..f9a45f0 100644
--- a/vectorpoint.go
+++ b/vectorpoint.go
@@ -86,19 +86,19 @@ func RectIntersection(r Rect2d, p Point2d, v Vector2d) (bool, bool, Point2d) {
 		inside = true
 		return collision, inside, Point2d{X: 0, Y: 0}
 	} else {
-		wall_left, col1 := Intersection(p, r.A, v, Vector2d{X: 0, Y: r.B.Y})
+		wall_left, col1 := Intersection(p, r.A, v, Vector2d{X: 0, Y: r.B.Y - r.A.Y})
 		if wall_left {
 			return wall_left, inside, col1
 		}
-		wall_top, col2 := Intersection(p, r.A, v, Vector2d{X: r.B.X, Y: 0})
+		wall_top, col2 := Intersection(p, r.A, v, Vector2d{X: r.B.X - r.A.X, Y: 0})
 		if wall_top {
 			return wall_top, inside, col2
 		}
-		wall_right, col3 := Intersection(p, r.B, v, Vector2d{X: 0, Y: -r.B.Y})
+		wall_right, col3 := Intersection(p, r.B, v, Vector2d{X: 0, Y: -r.B.Y + r.A.Y})
 		if wall_right {
 			return wall_right, inside, col3
 		}
-		wall_bottom, col4 := Intersection(p, r.B, v, Vector2d{X: -r.B.X, Y: 0})
+		wall_bottom, col4 := Intersection(p, r.B, v, Vector2d{X: -r.B.X + r.A.X, Y: 0})
 		if wall_bottom {
 			return wall_bottom, inside, col4
 		}