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 › Suggestions & Bugs › Website,  Documentation,  Book Bugs › Color Section of Tutorial by Daniel Shiffman
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1
Color Section of Tutorial by Daniel Shiffman (Read 1349 times)
incredibleyellow
Color Section of Tutorial by Daniel Shiffman
Apr 3rd, 2010, 1:26pm  
To whom it may concern,
I am a complete newbie to this stuff but i think there may be an oversight in the "COLOR" section of the tutorials.
It's no biggie but being a newbie it took a second for me to make the corrections.
In the "Color Transparency Section" the code given is:

background(0);
noStroke();

// No fourth argument means 100% opacity.
fill(0,0,255);
rect(0,0,100,200);

// 255 means 100% opacity.
fill(255,0,0,255);
rect(0,0,200,40);

// 75% opacity.
fill(255,0,0,191);
rect(0,50,200,40);

// 55% opacity.
fill(255,0,0,127);
rect(0,100,200,40);

// 25% opacity.
fill(255,0,0,63);
rect(0,150,200,40);

To make the "Alpha Transparency" example shouldn't it be:

background(0);
noStroke();

// No fourth argument means 100% opacity.
fill(0,0,255);
rect(0,0,width/2,100);

// 255 means 100% opacity.
fill(255,0,0,255);
rect(0,0,100,20);

// 75% opacity.
fill(255,0,0,191);
rect(0,25,100,20);

// 55% opacity.
fill(255,0,0,127);
rect(0,50,100,20);

// 25% opacity.
fill(255,0,0,63);
rect(0,75,100,20);

or...

size(200,200);
background(0);
noStroke();

// No fourth argument means 100% opacity.
fill(0,0,255);
rect(0,0,100,200);

// 255 means 100% opacity.
fill(255,0,0,255);
rect(0,0,200,40);

// 75% opacity.
fill(255,0,0,191);
rect(0,50,200,40);

// 55% opacity.
fill(255,0,0,127);
rect(0,100,200,40);

// 25% opacity.
fill(255,0,0,63);
rect(0,150,200,40);

?

Back to top
 
 
Cedric
Re: Color Section of Tutorial by Daniel Shiffman
Reply #1 - Apr 3rd, 2010, 1:43pm  
so what exactly did you change ?
[color=#0000ff] ???
why?
Back to top
 
... twitter.com/CedricKiefer
WWW CedricKiefer 9570393 CedricKiefer  
Daniel Shiffman
Re: Color Section of Tutorial by Daniel Shiffman
Reply #2 - Apr 4th, 2010, 6:49am  
Whoops, yes, I left off size(200,200); by accident.  Will fix now, thanks!
Back to top
« Last Edit: Apr 4th, 2010, 11:00am by Daniel Shiffman »  
http://www.learningprocessing.com | http://www.shiffman.net | http://itp.nyu.edu
WWW  
Cedric
Re: Color Section of Tutorial by Daniel Shiffman
Reply #3 - Apr 4th, 2010, 7:20am  
ah size was the problem couldnt figure it out Smiley
Back to top
 
... twitter.com/CedricKiefer
WWW CedricKiefer 9570393 CedricKiefer  
Page Index Toggle Pages: 1
‹ Previous Topic | Next Topic ›