vertex arrays to image background

Programming Questions

psykolio

vertex arrays to image background

in Programming Questions • 2 years ago

Hello,

I'm trying to optimize an application where I use some vertex arrays for the rendering. Right now, at every frame, some elements are added to the buffers and every elements are drawn to the screen. I'd like to make a "screen capture" at some point, save the current frame like a "static image", emty the buffers and use the capture as a background (no need to compute the elements already drawn after a while).

If anyone has some advice, idea or direction to do that, it would be nice!!

Replies(3)

calsign

Re: vertex arrays to image background

2 years ago

save() will save an image to file, while loadPixels() and the pixels array will allow access to the pixels as of when loadPixels() is called. I thought I might suggest these.

psykolio

Re: vertex arrays to image background

2 years ago

thanks a lot for your reply,

since I don't need to actually save a file, I'd like to avoid storing the image in the hdd. I was thinking about something more like createGraphics() but it doesn't work with openGL...

edit: loadPixels could be an option but how do I efficiently draw every pixels of the array on the screen? Or maybe convert the pixel array into a PImage?

psykolio

Re: vertex arrays to image background

2 years ago

and then there is the FBO (frame buffer objects) solution... I've never used them but I think it's the best solution if i want to render the background fast... do anyone have some fbo examples (with Processing)????

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