Comments on: Exercise 1-2

By: Anonymous

Anonymous — Fri, 06 Jan 2012 22:03:00 +0000

Yes, technically, you are correct. I’m not sure why Processing generated the rectangle one pixel higher. Most likely, this is due to the fact the Processing puts the outline of a shape on the outside pixel (i.e. the interior width is 4, so the line falls on the 5th pixel). This is mostly an artifact of looking at this shapes zoomed in.

By: Natalie

Natalie — Fri, 06 Jan 2012 08:01:00 +0000

Just realized there’s a difference between rect(CORNER) and rect(CORNERS) so disregard previous questions…. However the rectangle in the answer seems to be rect(5,0,5,4) – 1 pixel larger on each side?

By: Natalie

Natalie — Fri, 06 Jan 2012 07:51:00 +0000

Whoops autocorrect I meant rect not rectify

By: Natalie

Natalie — Fri, 06 Jan 2012 07:50:00 +0000

For rectify(5,0,4,3) in corners mode, wouldn’t (4,3) as the supposed “bottom right corner” produce an error since it is to the left of the top left corner (5,0)? I don’t understand the diagrammed rectangle in the answer but am I just completely missing something?

By: Lun Chanmaranden

Lun Chanmaranden — Tue, 15 Nov 2011 05:44:00 +0000

sum=0
for(i=1;i<=n;i++)
sum=sum+i;

By: admin

admin — Sat, 20 Sep 2008 03:13:38 +0000

Re: rect(5,0,4,3). This is another excellent point. Really, you are correct. I’m not sure why Processing generated the rectangle one pixel higher. Most likely, this is due to the fact the Processing puts the outline of a shape on the outside pixel (i.e. the interior width is 4, so the line falls on the 5th pixel). This is mostly an artifact of looking at this shapes zoomed in.

By: admin

admin — Sat, 20 Sep 2008 03:11:17 +0000

Yes, technically you are correct. However, it is physically impossible to have an ellipse with a perfect center at (3,7) with an “even” width. So Processing approximates. I didn’t mean for this to be a trick question, however, and it’s really an oversight on my part. The exercise would be a lot clearer with (3,7,5,5). Nevertheless, the above result is exactly how Processing would do it (the answer was generated with Processing itself!).

By: Pete

Pete — Sat, 20 Sep 2008 03:07:06 +0000

rect (5,0,4,3);

should be…
rect (5,0,5,4);
based upon figure 1.7 in book.

Yes? No?

By: Pete

Pete — Sat, 20 Sep 2008 03:02:18 +0000

ellipse (3,7,4,4);

should be…
ellipse (3,7,5,5);
based upon figure 1.10 in book.

Yes? No?