[RQt-devel] segment glyph

[Yihui Xie]

It works great now. See the last two pictures:
http://github.com/bigbear/cranvas/wiki/Parallel-coordinates-plot

Thanks a lot!

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: 515-294-2465 Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA



On Thu, Oct 21, 2010 at 11:53 PM, Michael Lawrence
<lawrence.michael at gene.com> wrote:
> I tried to fix this. Please let me know.
>
> Michael
>
> On Wed, Oct 20, 2010 at 10:23 PM, Michael Lawrence <michafla at gene.com>
> wrote:
>>
>> I'll look into this. Just FYI, this works fine when OpenGL is disabled by
>> passing opengl=FALSE to qplotView(). Need to get this working with GL.
>>
>> Michael
>>
>> On Wed, Oct 20, 2010 at 3:18 PM, Yihui Xie <xieyihui at gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> I want to define a glyph which is a short segment as follows, but when
>>> the slope b=0, the glyph looks weird on screen (it is a filled
>>> square); other slopes are fine. I don't know what's going on:
>>>
>>> library(qtpaint)
>>> ## x: length; b: slope
>>> qglyphSegment <- function(x = 5, b = 0) {
>>>  glyph <- Qt$QPainterPath()
>>>  x0 <- x * cos(atan(b))
>>>  y0 <- x * sin(atan(b))
>>>  glyph$moveTo(-x0, -y0)
>>>  glyph$lineTo(x0, y0)
>>> #  glyph$closeSubpath()
>>>  glyph
>>> }
>>>
>>> s <- qscene()
>>> test_layer <- qlayer(s, function(layer, painter) {
>>>    qdrawGlyph(painter, qglyphSegment(), 1:10, .5, stroke = 'black')
>>>    qdrawGlyph(painter, qglyphSegment(10, 1), 1:10, .7, stroke = 'black')
>>>    qdrawGlyph(painter, qglyphSegment(10, -1), 1:10, .3, stroke = 'black')
>>> }, limits=qrect(0,0,11,1))
>>> qplotView(s)
>>> ## see the screenshot attached
>>>
>>>
>>> Thanks!
>>>
>>> Regards,
>>> Yihui
>>> --
>>> Yihui Xie <xieyihui at gmail.com>
>>> Phone: 515-294-2465 Web: http://yihui.name
>>> Department of Statistics, Iowa State University
>>> 2215 Snedecor Hall, Ames, IA
>>>
>>> _______________________________________________
>>> Qtinterfaces-devel mailing list
>>> Qtinterfaces-devel at lists.r-forge.r-project.org
>>>
>>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/qtinterfaces-devel
>>>
>>
>
>