On Wed, 3 Feb 2010, baptiste auguie wrote:
Thanks for this complementary information. My head itches slightly
when reading about these virtual layers with unidirectional absorption
and reflection properties but I guess that's imputable to my personal
background as a physicist.
It's not unidire
Thanks for this complementary information. My head itches slightly
when reading about these virtual layers with unidirectional absorption
and reflection properties but I guess that's imputable to my personal
background as a physicist.
I still have a few questions,
- is this behavior documented? (
On MacOSX I can tell Preview or Photoshop not to use a white
background yet the mixing still shows a difference (with either pdf or
png for that matter). So I guess it's something to do with mixing
colours with the transparent channel as you say. I'll try to find the
reason in the source code later
On Wed, 3 Feb 2010, baptiste auguie wrote:
That makes perfect sense, thank you, except that I'm not sure where
the white comes from when I set the background to transparent?
png("testingOrder.png", bg = "transparent")
plot.new()
par(bg="transparent")
rect(0.3, 0.5, 1, 1, col=rgb(1, 0, 0, alpha=
On 03/02/2010 9:38 AM, baptiste auguie wrote:
That makes perfect sense, thank you, except that I'm not sure where
the white comes from when I set the background to transparent?
You'd have to check the png device documentation or source code to find
out what it does when you mix half red wit
That makes perfect sense, thank you, except that I'm not sure where
the white comes from when I set the background to transparent?
png("testingOrder.png", bg = "transparent")
plot.new()
par(bg="transparent")
rect(0.3, 0.5, 1, 1, col=rgb(1, 0, 0, alpha=0.5))
rect(0, 0.5, 0.7, 1, col=rgb(0, 0, 1, al
On 03/02/2010 8:50 AM, Ken Knoblauch wrote:
baptiste auguie googlemail.com> writes:
Adding two semi-transparent colours results in non-intuitive colour
mixing (a mystery for me anyway). Is it additive (light), substractive
(paint), or something else? Consider the following example, depending
on
baptiste auguie googlemail.com> writes:
> Adding two semi-transparent colours results in non-intuitive colour
> mixing (a mystery for me anyway). Is it additive (light), substractive
> (paint), or something else? Consider the following example, depending
> on the order of the two "layers" the over
Hi,
Adding two semi-transparent colours results in non-intuitive colour
mixing (a mystery for me anyway). Is it additive (light), substractive
(paint), or something else? Consider the following example, depending
on the order of the two "layers" the overlap region is either purple
or dark red. I h
On 02/03/2010 08:43 PM, bluecuttlefish wrote:
I am using ggplot and posted this question at that helplist. It was
suggested that I try a more general R-help list for a possible solution to
this problem.
Within ggplot, I am using geom_area with red and blue and expect where they
overlap should be
I am using ggplot and posted this question at that helplist. It was
suggested that I try a more general R-help list for a possible solution to
this problem.
Within ggplot, I am using geom_area with red and blue and expect where they
overlap should be purple. But instead, it's dark red.
Playing wi
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