renaming rect to AABB

obstacle.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Obstacle struct {
-	Bounds v.Rect2d `json:"bounds"`
+	Bounds v.AABB2d `json:"bounds"`
 	Hp     int      `json:"-"`
 }
 
@@ -45,7 +45,7 @@ func GenerateObstacles(count int, width, height float32) []Obstacle {
 		out = append(
 			out,
 			Obstacle{
-				Bounds: v.Rect2d{
+				Bounds: v.AABB2d{
 					A: v.Point2d{X: x, Y: y},
 					B: v.Point2d{X: 20 + x + w, Y: 20 + y + h},
 				},