Rain effect based on what's already on screen

[Tismas]

Hi guys

Is there a simple way of doing some rain effect/blur action on already drawn things? I came up with two solutions: modifing drawing methods of all entities and somehow managing to check drawn pixels and then redraw thing with modified values, but neither of them satisfies me
Is there a better way?

[albinopapa]

When you say rain effect, are you talking about water droplets on camera lens? If so, you could try creating a method in the Graphics class that after everything is done drawing, you call this method. The method would read from the system buffer, and modify the pixels on the back buffer. If you just want to blur each object as a mist is bouncing off each object, then you could render an object, then blur the resulting image before pasting to the back buffer.

[Tismas]

I actually meant water droplets on camera and bouncing off the ground So I think I'll try modifing pixels on the back buffer for both of them. Time for deep dive into Graphics class, Thanks!

[chili]

Yeah, some simple solution to blurring involve re-using the contents of previous frames i think.

This is something I was playing with in 2012.