Puzzling question

Scripting
1

Hello to the Unity community first time poster here! I have been going through the Walker Boys tutorials learning Unity development and I am kind of stumped as to why this is happening. I am on the tool development tutorial and during step 6 of the ani tool spreadsheet creating a 2d array offset and this is my code(C#) which works fine.;

public class step62darrayoffset : MonoBehaviour
{
public int column; //u coordinate
public int row; //v coordinate
public float framesPerSecond = 8.0f;

void Update()
{
int index = Mathf.RoundToInt(Time.time * framesPerSecond); //Time control FPS.

index = index % (column * row); //End of the row(modulated).
Vector2 size = new Vector2(1.0f / column, 1.0f / row); //scale.
int u = index % column;
int v = index / column;
Vector2 offset = new Vector2(u * size.x, (1 - size.y) - (v * size.y)); //offset.
print(index);
renderer.material.mainTextureOffset = offset; //texture offset.
renderer.material.mainTextureScale = size; //texture scale.
}
}

But when i move the (u) and (v) variables to initialize them just after the index initialization when i run the animation it works for a few frames and then changes to a bunch of lines on the animation spreadsheet, like its changing the scale or something. Now i don’t mind but i usually like to initialize variables at the top if i can and don’t see why it would make a difference.

Any explanation to this issue would be much appreciated!

2

bump! nobody?

3

first off, [code ] [/code ] tags make things much more readable (and gives line numbers :slight_smile: )

void Update()
{
	int index = Mathf.RoundToInt(Time.time * framesPerSecond); //Time control FPS.

	index = index % (column * row); //End of the row(modulated).
	Vector2 size = new Vector2(1.0f / column, 1.0f / row); //scale.


	int u = index % column;
	int v = index / column;

	Vector2 offset = new Vector2(u * size.x, (1 - size.y) - (v * size.y)); //offset.
	print(index);
	renderer.material.mainTextureOffset = offset; //texture offset.
	renderer.material.mainTextureScale = size; //texture scale.

}

do you move lines 9 and 10 to just after line 3? (i.e. before line 5 where the index is updated…)

4

Yes. And thank you for replying and the tip on the /code i will use that next time.

5

And i think you answered my question thanks!