look at jit.3m. If it's just b&w image, the mean value of any color should be representative of the % white vs. black (scale 0-255 to 0. - 100.).

David

thanks David thats a nice simple solution. Cheers.

If I wanted to develop this further I ahve a question about maths. Awesome I know,

Now that I have a % of 'life' (white squares at a given time I want to write a mathematical expression that says something like:

'if life = 'if life = >25% but .....etc for >50% and less than 75% = c3, and >75% = c4

To wirte an instruction/statement/message like this my head says if I put it between the two objects in question it will act as a sort of 'check' before produceing the outcome.

is this the case or is it better to have some sort of global message that applies to the patch as a whole? Also im trying to work through some examples with vexpr to try to acheive this - is this the right object to use?

appreciation in advance

Hi Ali, There are a couple ways deal with conditions in Max. Start with if/then, e.g.:

[if $f1 < 25. then bang]

Check out the if/then help for more syntax, multiple conditions, etc.

David