Lock billboards horizontally about directionalspriteshader HOT 3 OPEN

I took a quick look and it depends on the method used for billboarding.

• When using the method outlined in this article (https://www.noveltech.dev/unity-lit-billboard-shadergraph/), it's trivial to implement.
  You can add a Vector3 property frozenAxis to your shadergraph, multiply object position by this vector3
  Then do one minus frozenAxis, multiply the billboard position by it.
  Finally add the two together for your position and feed it to the output node and you're done (basically lerping between basic and billboarded position).

The method outlined in the article also allows lit billboards so it's pretty nice, but it has the unfortunate side effect of reversing UVs so you need to handle it in your shadergraph.

from directionalspriteshader.

The method for billboarding in the implementation in the repo differs from the one I mentionned in the previous comment since it seems to more or less disregard the Y-axis. Instead rotation seems to be purely driven by x and z vertex position so you can't use the previous trick.

I'll try to find a solution and upload cleaned and up-to-date versions for the shaders.

from directionalspriteshader.

For billboarding with locked y I like the following script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
//Thank you! https://youtu.be/_LRZcmX_xw0
public class Billboard_Sprite : MonoBehaviour
{
private Camera theCam;

public bool useStaticBillboard; //This here prevents the twisting of the trees

// Start is called before the first frame update
void Start()
{
    theCam = Camera.main;
}

// Update is called once per frame
void LateUpdate()
{
    //transform.LookAt(theCam.transform); ((This here causes the trees to twist))

    if (!useStaticBillboard)
    {
        transform.LookAt(theCam.transform);
    } else
    {
        transform.rotation = theCam.transform.rotation;
    }


    transform.rotation = Quaternion.Euler(0f, transform.rotation.eulerAngles.y, 0f);
}

}

from directionalspriteshader.