change Mesh.colors over time help?

Questions & Answers
1

Hello all,

I have a mesh and I am using mesh.colors to get a gradient. I am trying to get the gradient colors to change over time. I tried this but I believe that I am completely off here, and in addition the code did not work. can someone help me to change the colors in the vertical gradient over a timeframe of 5 seconds?
Here is the code that I am using:

    public Color palet;
    public Color palet1;
    public Color palet2;
    public Color palet3;
    public Color palet4;
    public Color palet5;
    public bool on = true;
    public float currentTime = 0f;
    public Mesh mesh;
    Vector3[] vertices;
    public Color[] colors;

    // Use this for initialization
    void Start()
    {
        mesh = GetComponent<MeshFilter>().mesh;
        vertices = mesh.vertices;
        colors = new Color[vertices.Length];

        for (int i = 0; i < vertices.Length; i++)
            colors _= Color.Lerp(palet1, palet, vertices*.y);*_

}

// Update is called once per frame
void Update () {
mesh.colors = colors;

if (on == false)
{
for (int i = 0; i < vertices.Length; i++)
colors = Color.Lerp(Color.Lerp(palet1,palet3, currentTime), Color.Lerp(palet, palet2, currentTime), vertices*.y);*
}
}

2

currentTime is always the same. In Update you should modify it: currentTime -= Time.deltaTime;

The third value in your lerp needs to be between 0 and 1, so if you want currenTime to start from 5 you should change it to Color.Lerp(palet1,palet3, currentTime * 0.2f). Now your mesh should change color over time. You also need a shader that supports vertex colors, if you use any standard shaders the mesh will be just white.

edit: I tested it with plane first and got same color for whole mesh. Using a mesh that actually has different y coordinates for vertices gives gradient color.

3

Here’s The Code -

     Mesh gradientPlaneMesh;
     void Start()
     {
   //gameobject which has the mesh you want to lerp the color of
   gradientPlaneMesh = GameObject.Find("Gradient Plane").GetComponent<MeshFilter>().mesh;
    }
    void Update()
    {
  Color[] meshColor = gradientPlaneMesh.colors;
  Color[] newColor = new Color[4]{topColor,topColor,bottomColor,bottomColor};
//MY MESH HAS 4 VERTICES, you can modify this number to your requirement
    gradientPlaneMesh.colors = new Color[4] {Color.Lerp(meshColor[0],newColor[0],Time.deltaTime*5f),Color.Lerp(meshColor[0],newColor[0],Time.deltaTime*5f),Color.Lerp(meshColor[2],newColor[2],Time.deltaTime*5f),Color.Lerp(meshColor[2],newColor[2],Time.deltaTime*5f)};
    }

i know i am changing only the first and third color of my mesh but i think it works for me you cna modify this code as you want, i just wanted to Make this clear that you can Change the mesh color as color.Lerp.

Happy Unitying!

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