We closed this forum 18 June 2010. It has served us well since 2005 as the ALPHA forum did before it from 2002 to 2005. New discussions are ongoing at the new URL http://forum.processing.org. You'll need to sign up and get a new user account. We're sorry about that inconvenience, but we think it's better in the long run. The content on this forum will remain online.
Index › Programming Questions & Help › Syntax Questions › How to do a HeatMap?
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1
How to do a HeatMap??? (Read 1324 times)
doart3
How to do a HeatMap???
May 7th, 2010, 9:23am  
Hello,

I know this question as been asked quite a few times, but I have implemented the heatmap like some people described here, and it's really slow. I don't know if I'm doing it right.
I'm creating a image with transparent elipses (that overlap creating darker and clearer areas), after that I check each pixel of the image I created and do a lerpColor() with the alpha value of the pixel.
The problem with this is that it's too slow, do you know any better way to do a heatmap?

Thanks
doart3
Back to top
 
 
andrewowaun
Re: How to do a HeatMap???
Reply #1 - May 7th, 2010, 12:10pm  
Drawing an ellipse in processing is slower than drawing a rect and rotating for some reason.

Try using rotating rectangles. Lerp is cool but I prefer the blend functions. Gives me more range.

Back to top
 
 
Page Index Toggle Pages: 1
‹ Previous Topic | Next Topic ›