use ecs.IsGameObject instead of cast

2 files changed, 15 insertions, 3 deletions

diff --git a/objs/cursor.go b/objs/cursor.go
index b1fdca3..dd09a8b 100644
--- a/objs/cursor.go
+++ b/objs/cursor.go
@@ -12,12 +12,24 @@ type Cursor struct {
 
 func (c *Cursor) Render(renderer *sdl.Renderer) {
 	renderer.SetDrawColor(255, 0, 0, 255)
-	renderer.RenderPoint(c.Position.X, c.Position.Y)
+	r := &sdl.FRect{
+		X: c.Position.X - 5,
+		Y: c.Position.Y - 5,
+		W: 10,
+		H: 10,
+	}
+	renderer.RenderRect(r)
 }
 
 func (c *Cursor) Process(ev input.Event) {
 	c.Position.X += ev.Dx
 	c.Position.Y += ev.Dy
+	if c.Position.X < 0 {
+		c.Position.X = 0
+	}
+	if c.Position.Y < 0 {
+		c.Position.Y = 0
+	}
 }
 
 func (c *Cursor) GO() *ecs.GameObject {
diff --git a/objs/root.go b/objs/root.go
index 59e0c6a..649200d 100644
--- a/objs/root.go
+++ b/objs/root.go
@@ -10,7 +10,7 @@ type Root struct {
 }
 
 func (root *Root) Render(r *sdl.Renderer) {
-	r.SetDrawColor(255, 255, 255, 255)
+	r.SetDrawColor(0, 0, 0, 255)
 	r.Clear()
 }
 
@@ -21,5 +21,5 @@ func NewRoot(children ...ecs.IsGameObject) ecs.IsGameObject {
 			Children: children,
 		},
 	}
-	return r.GameObject
+	return r
 }