Simple material script mistake (help with C#)

Unity Engine
1

Hello all,

I have waterfalls in my project which have 3 different planes of geometry, scrolling their UVs at different intervals, in order to achieve the effect I want. To do this I have been using the UV Scrolling code from the wiki, and I attached the script three times to each waterfall (one for each material index).

Here is the original code:

using UnityEngine;
using System.Collections;

public class uvScroll : MonoBehaviour
{
    public int materialIndex = 0;
    public Vector2 uvAnimationRate = new Vector2( 1.0f, 0.0f );
    public string textureName = "_MainTex";

    Vector2 uvOffset = Vector2.zero;

    void LateUpdate()
    {
        uvOffset += ( uvAnimationRate * Time.deltaTime );
        if( renderer.enabled )
        {
            renderer.materials[ materialIndex ].SetTextureOffset( textureName, uvOffset );
        }
    }
}

Desiring a clean project, I attempted to combine the functions of the three into one simple script, but my scripting skills are horribly lacking and the UVs end up being scrolled at a rate equal to the sum of all 3 floats, rather than each material index scrolling at its own rate.

Here is my modified code:

using UnityEngine;
using System.Collections;

public class uvScroll_waterfall : MonoBehaviour
{
    public int materialIndex0 = 0;
	public int materialIndex1 = 1;
	public int materialIndex2 = 2;
    public Vector2 uvAnimationRate0 = new Vector2( 0.0f, 1.25f );
	public Vector2 uvAnimationRate1 = new Vector2( -0.15f, 1.0f );
	public Vector2 uvAnimationRate2 = new Vector2( 0.15f, 0.75f );
	public string textureName0 = "_BumpMap";
    public string textureName1 = "_MainTex";
	public string textureName2 = "_MainTex";

    Vector2 uvOffset = Vector2.zero;

    void LateUpdate()
    {
        uvOffset += ( uvAnimationRate0 * Time.deltaTime );
        if( renderer.enabled )
        {
            renderer.materials[ materialIndex0 ].SetTextureOffset( textureName0, uvOffset );
        }

        uvOffset += ( uvAnimationRate1 * Time.deltaTime );
        if( renderer.enabled )
        {
            renderer.materials[ materialIndex1 ].SetTextureOffset( textureName1, uvOffset );
        }

		uvOffset += ( uvAnimationRate2 * Time.deltaTime );
        if( renderer.enabled )
        {
            renderer.materials[ materialIndex2 ].SetTextureOffset( textureName2, uvOffset );
        }
    }
}

Can a more experienced C# user tell me how to structure this so that each material scrolls at it’s own rate?

Many thanks for any help or suggestions!

2

The reason it’s doing so is because you’re executing the same thing three times in a row.
Any reason why you want to do that anyway?
According to what you said you have 3 different planes, which I assume are different gameobjects? If so, attach a script to each one and change attributes in that instance.

3

It’s actually one game object with 3 different planes, each having a unique material assignment.

4

Tell me more

The problem might be in

uvOffset += ( uvAnimationRate1 * Time.deltaTime );

What is done here as far as I understand is it adds more to the value each time thus speeding it up. Try using three different offsets instead of one.

5

Thanks for the reply! I will try this.