fix SetCeter() bug

Author: setanarut

camera.go

@@ -306,8 +306,8 @@ func (cam *Camera) SetTopLeft(x, y float64) {
 //
 // Can be used to cancel follow camera and teleport to target.
 func (cam *Camera) SetCenter(x, y float64) {
-	cam.LookAt(x, y)
 	cam.TempTargetX, cam.TempTargetY = x, y
+	cam.LookAt(x, y)
 }
 
 // Center returns center point of the camera in world-space

camera_test.go

@@ -24,3 +24,24 @@ func TestCenter(t *testing.T) {
 		t.Error()
 	}
 }
+func TestSetCenter(t *testing.T) {
+	k := kamera.NewCamera(0, 0, 100, 100)
+	k.SmoothType = kamera.SmoothDamp
+	k.SetCenter(3, 5)
+	x, y := k.Center()
+	if x != 3 && y != 5 {
+		t.Error()
+	}
+	if k.TempTargetX != 3 || k.TempTargetY != 5 {
+		t.Error()
+	}
+	k.SmoothType = kamera.Lerp
+	k.SetCenter(5, 3)
+	x, y = k.Center()
+	if x != 5 && y != 3 {
+		t.Error()
+	}
+	if k.TempTargetX != 5 || k.TempTargetY != 3 {
+		t.Error()
+	}
+}