koobas.hobune.stream
Jittery background when implementing parallax effect
I'm trying to create a 2D sidescroller that implements a parallax effect for the background (there is also a ground which does not use the effect). The camera follows the player, and the player controls a unit that can move left and right. In other words, there is no set speed for the ground to move at so I can't just have the background scroll at a fraction of the speed as the ground.
My current solution is to move the background a fraction of the player's x velocity. I add this in the update function of the backgrounds script:
transform.position = transform.position + Vector3.right * playerRb.velocity.x * Time.deltaTime * 0.9f;
Here, i'm trying to make the background scroll at 90% of the player's speed. This actually seems to work, except for the fact that it is extremely jittery when I test it in Unity (I left out infinite scrolling for now).
Does anyone know why this may happen? Is there something wrong with the way that I position the background images?
That looks like it's jumping backwards sometimes. Check if playerRb.velocity.x becomes negative at any time.
I think you might be right, except ins$$anonymous$$d of negative velocities, I may have had a negative acceleration. I think the velocity wasn't strictly increasing like I expected to, it jumped backwards sometimes, which may have caused the jittering effect. Thanks!
You should be able to do something simple like this (assuming you only want the background moving on the X-axis
Vector2 _x= new Vector2 (player.transform.position.x, 0);
transform.position = _x * 0.9f;
player is the gameObject of the player
I tried this myself and it didn't have any stuttering. Let me know how it works out for you!
This worked great for me! I'm not sure why I was using velocity ins$$anonymous$$d of position. Thanks!
