A neater way of updating the image_index from array values? [RESOLVED]

[innercitysumo]

I'm trying to learn coding & GameMaker and one of the things I worry about is that my solutions are very inefficient/messy because I rely heavily on the few things I know. Here's an example where I feel it could be made more elegant, but I don't know how.

I have an array that I use to keep track of the health of different parts of a ship, e.g. hull, engines etc. This value, 0-100, is then used to display a sprite - so if the health of the hull is 20% then the 20% health graphic is displayed in the relevant section.

In the Step event I am setting the image_index based on the array value as per the code below, but there is a *lot* of repetition. My first thought was to use a Switch case, but it looks like I can't do that with an array. Does anyone have any pointers on how I could do this better?

Thanks

if array[0,0] == 100
{
image_index = 0;
}

if array[0,0] == 90
{
image_index = 1;
}

if array[0,0] == 80
{
image_index = 2;
}

if array[0,0] == 70
{
image_index = 3;
}

// etc

 

[NazGhuL]

...

 

[DevNorway]

image_index = 10 - (array[0, 0]  / 10);

You probably need to use the round or floor function in this code. Pick what suits you the best.

 

[innercitysumo]

Thanks, that looks much better.