white background rect with only 6 alpha value turns grey not white

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white background rect with only 6 alpha value turns grey not white

in Programming Questions • 1 year ago

hi, i'm working often with alpha background rect's to slowly blend out the objects. i found out that with lower alpha values white turn grey and black too. is there a solution that white stays white and black black? thank you!

fill(255,7);
rect(0,0,width,height);

Replies(6)

gspot38

Re: white background rect with only 6 alpha value turns grey not white

10 months ago

background(255);// that means white
fill(255,7);
rect(0,0,width,height);

Try this code..

You have not set background color.. The default is gray so white on gray is gray again!

Try to change the background(255) to background(#ff0000) and you will realize that you get a red color.. after that change ONLY the alpha of your fill .. and you 'll get the idea!

Re: white background rect with only 6 alpha value turns grey not white

10 months ago

Why answer a 5 month old topic?

calsign

Re: white background rect with only 6 alpha value turns grey not white

10 months ago

Agreed. This is the second or third time that they have done it. I sent them a PM...

Re: white background rect with only 6 alpha value turns grey not white

10 months ago

I just found this question on the unanswered ones and I replied..I did not notice that was 5 months old..

I replied because maybe someone has the same question. You should ask why this kind of question hasn't been answered for 5 months..

Re: white background rect with only 6 alpha value turns grey not white

10 months ago

This question has been answered before. See for example:

https://forum.processing.org/topic/background-will-not-fade-to-white
https://forum.processing.org/topic/screen-fading-code-doesn-t-work-in-opengl
http://wiki.processing.org/w/Fading_the_screen_to_black/any_color
http://processing.org/discourse/beta/num_1199456841.html
http://processing.org/discourse/alpha/board_general_action_display_num_1077824259.html
http://processing.org/bugs/bugzilla/850.html

Re: white background rect with only 6 alpha value turns grey not white

10 months ago

I am not fan of reviving old topics for asking your own question, but the answer above is OK for me, going from a good willing to help, even if that's not for the original poster but for those searching for answers.
amnon.owed made it an even better reference thread!

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white background rect with only 6 alpha value turns grey not white

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Re: white background rect with only 6 alpha value turns grey not white

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Re: white background rect with only 6 alpha value turns grey not white

Re: white background rect with only 6 alpha value turns grey not white

Re: white background rect with only 6 alpha value turns grey not white

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