GP Beta Test Forum

I've shared negation before. Here's a version of negation that's a little different:

• The inverse amount is a local variable.
• I'm using the new get-x and get-y blocks I created so that I can use the existing set color, rather than setting RGB separately.

Using this version, you can turn Big Ben into this: But if you subtract from something OTHER THAN 255, you get some really cool effects, some of which are akin to posterizing.

Here's 128: 400 is fun, too, but the forum won't let me upload it. A limit on how much I can upload?

If you remove the copy from costume block, you can negate the negation, to get other sets of interesting colors.

I got the outputs above by a new block I created "save costume as image" (seen at the bottom of the blocks image above). Using that, I can compute an image, then save it back to the images pane for export.

Using that new block, I discovered a couple of (what I think are) bugs in GP:

• If you click the save costume as block more than once, it saves multiple costumes to the pane. That's not really a problem. But if you delete one of the "128-bigben" images, all the images with that name are deleted.
• I had to right click on my costume name slot to set it to be string. But when I executed the script, it turned the slot back to readonly -- which is why my clicks on the name to change the string kept creating another copy of the costume on the images pane.

mguzdial wrote:but the forum won't let me upload it. A limit on how much I can upload?

Yes, there is a limit to the number of attachements per post. It was 5, now it is 20.

Thanks, John!

I tried putting the negate/posterize block inside an animate loop. That way, you can click on the constant and sweep up and down to explore the space. Because it takes a moment to update from the costume and iterate over the pixels, it's a little slow, but it works.