Detecting the area of overlap

Ticker

Hey hey. I made an account just so I could ask these questions, because I couldn't find any answers online. These questions sort of go hand-in-hand.

1) How can I apply a collision shape to a polygon drawn using code? 2) (more importantly) I'm trying to detect how much of another collision shape is overlapping said polygon. I want it to return how many individual pixels are overlapping. Is there any way to do this? If not, what alternative methods can I use to achieve this?

Thanks.

picnic

Question 1- If the polygon has a random or changeable shape then I don't know but a simple general procedure for Question 2 is:

Figure out the size of the rectangle of overlap (using a rectangle around each shape). Check pixels in the relevant area of each shape - if both are set increase your counter. I made a diagram to better explain :smiley: but this would be a very expensive procedure if repeated frequently of the shapes were large.

I'm making the assumption that you can grab part of your viewport into a texture (don't know Godot well enough yet!) but image.get_pixel(x, y) allows you to read pixels directly.