Displaying 20 results from an estimated 39 matches for "tessellated".
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tessellate
2006 Jul 19
2
voronoi tessellations
Okay, been working with tripack, seems the most mature package for this. Got it to work well with their test data set - data(tritest). When i tried random numbers to explore further, i am getting some results that don't reconcile.
example run this:
library(tripack)
y <- runif(100)
x <- runif(100)
vm <- voronoi.mosaic(x,y)
plot(vm)
par(new=T)
plot(x,y,col='blue')
when
2010 Oct 15
0
tessellation from biological data in spatstat
Hi,
I'm new to this mailing list so apologies if this is too basic. I have
confocal images 512x512 from which I have extracted x,y positions of the
coordiates of labelled cells exported from ImageJ as a.csv file. I also
have images that define an underlying pattern in the tissue defined as
areas of different pixel values 0 or 255 (also 512x512) I've exported
these images as .txt
2007 Nov 27
1
voronoi/Delaunay/Dirichlet tessellation on sphere in R or S?
There's Renka's STRIPACK, and TRIPACK, respectively, ACM TOMS Algorithms
772 and 751, and there's the R package "deldir" which does the Delaunay
for a plane, but does anyone have or know of the tessellation in R for a
sphere?
Also, is there a standard indexing scheme for Delaunay facets, and
perhaps of edges in such facets? I'd expect that to be a publication
reference,
2015 May 18
2
Tessellation shaders get MEM_OUT_OF_BOUNDS errors / missing triangles
Hello,
I've been debugging a few different tessellation shader issues with
nouveau, but let's start small. I see this issue on my GK208 with high
frequency, and I *think* I've seen it once or twice on my GF108, but
it's exceedingly rare, if it does happen. I don't have a GK10x to test
on, unfortunately, but I assume it'll have the same issue as the
GK208.
The issue is
2010 Oct 16
0
Spatstat Tessellation error
...function
should give that:
>elev.quad.count<-quadratcount(points, tess=elev.tess)
But when I do this, I get a warning message saying:
Warning message:
In quadratcount.ppp(points, tess = aspect.tess) :
Tessellation does not contain all the points of X
I have checked and the extent of the tessellated elevation image is
different from the original elevation image (smaller). Is there anything I
am missing here?
Please any help will be appreciated.
--
Neba, Funwi-Gabga
Universitat Jaume I
Castellon, Spain.
[[alternative HTML version deleted]]
2010 Oct 20
0
Spatstat: tessellation problems.
...function
should give that:
>elev.quad.count<-quadratcount(points, tess=elev.tess)
But when I do this, I get a warning message saying:
Warning message:
In quadratcount.ppp(points, tess = aspect.tess) :
Tessellation does not contain all the points of X
I have checked and the extent of the tessellated elevation image is
different from the original elevation image (smaller). Is there anything I
am missing here?
Please any help will be appreciated.
--
Neba, Funwi-Gabga
Erasmus Mundus Masters
Geospatial technologies,
Superior School of Experimental Sciences and Technology,
Universitat Jaume I...
2015 May 26
2
Tessellation shaders get MEM_OUT_OF_BOUNDS errors / missing triangles
One additional observation that I just made is that on GK208, the blob
apparently doesn't use the result of S2R Rx, SR_INVOCATION_ID
wholesale in TCS. It either passes it through a I2I.S32.S32 Rx, |Rx|
(i.e. absolute value), or even more paradoxically, shl 2; shr 2; which
removes the top *2* bits, rather than just the top 1. However I see no
such behaviour on GF108.
I'm going to test out
2004 Aug 31
0
N-dimensional delaunay tesselation & voronoi diagrams
Hi,
I've been looking for functions that can do delaunay tesselation and
generate voronoi cells. I came across deldir and tripack but both seem
to be restricted to 2D points. Are there any packages that can do a
tesselation in N dimensions? I know that Matlab and Mathematica use the
qhull package to provide functions for this. Does anybody know of any R
packages that do this (maybe by calling
2015 May 18
2
[PATCH] nvc0: fix context destruction for partly implemented tesselation
Backtrace:
...
0x00007ffff57fc392 in __assert_fail () from /lib64/libc.so.6
0x00007ffff0cf5bec in nvc0_shader_stage (pipe=<optimized out>) at ./nvc0/nvc0_context.h:204
nvc0_set_constant_buffer (pipe=0x631080, shader=<optimized out>, index=<optimized out>, cb=0x0)
at nvc0/nvc0_state.c:771
0x00007ffff0a2cf63 in st_destroy_context (st=0x68a9f0) at state_tracker/st_context.c:382
2011 Feb 24
1
weighted Voronoi diagrams
Dear R-users,
Does anyone know how to do weighted Voronoi diagrams (Dirichlet
tesselation) in R? To be more specific, I have a set of coordinates for
tree locations on a plot, and I'm looking for a way to do the
tesselation so that the polygon size for each tree depends on the size
of the subject tree, and the size of its neighbors. So, the location of
the bisection between two trees
2008 Aug 18
2
Fwd: Parsing XML or KML into CSV /Using R for geocoding , OR problem
Hi,
I have a data file in a KML format which is Google Earth's format for
geographic data. I need to import it into a csv file . How can I do that.
KML format is just like XML format .example below
Which R module with deal with an OR problem (like transportation problem
using geo coded data as in the example below)
Regards,
Ajay
www.decisionstats.com
-
<?xml version="1.0"
2011 Jan 20
1
Generating time progressing line for Google Earth
Dear,
I am trying to visualise a time-progressing line (it's supposed to
represent spread patterns) using brew package and Google Earth.
The idea is to have a function which takes start and end point
geographic coordinates, as well as number of intervals to chop the path
up, and returns the collection of points segmenting this line.
Unfortunately my calculations fail for large distances,
2017 May 26
0
Wine release 2.9
The Wine development release 2.9 is now available.
What's new in this release (see below for details):
- Support for tesselation shaders in Direct3D.
- Binary mode support in WebServices.
- Clipboard changes detected through Xfixes.
- User interface improvements in RegEdit.
- Various bug fixes.
The source is available from the following locations:
2018 May 23
0
vkd3d release 1.0
The Wine team is proud to announce that release 1.0 of vkd3d, the
Direct3D 12 to Vulkan translation library, is now available.
This is the first release of vkd3d. A lot of Direct3D 12 features are still
missing and bugs are expected. The current version was tested mainly with demo
applications. A number of features that are being worked on have been deferred
to the next development cycle. This
2008 Feb 07
1
Voronoi
Hello everyone
I have a problem with tripack package, I want to perform a Voronoi
tessellation on a specific domain (I have the shape file), in order to
weight my climatic data with the area ... How Can I do it?
Thank you very much
Andrea
2013 Jul 14
2
Does R ever stop responding without a message?
Hi,
Have any of you ever encountered a situation where R stops processing an
instruction but does not give a "not responding" message?
The reason I ask is I am working in RStudio (Mac OS/X 10.7, 1.8 Ghz i7, 4
GB DDR3) and the instruction I entered in the command line pane is still
being processed since last night around 7 PM. I expected it to take on the
order of 8-12 hours to
2015 May 17
14
[PATCH 00/12] Tessellation support for nvc0
This is enough to enable tessellation support on nvc0. It seems to
work a lot better on my GF108 than GK208. I suspect that there's some
sort of scheduling shenanigans that need to be adjusted for
kepler+. Or perhaps some shader header things.
Even with the GF108, I still get occasional blue triangles in Heaven,
but I get a *ton* of them on the GK208 -- seemingly the same issue,
but it's
2020 Sep 22
0
vkd3d release 1.2
The Wine team is proud to announce that release 1.2 of vkd3d, the Direct3D to
Vulkan translation library, is now available.
This release contains improvements that are listed in the release notes below.
The main highlights are:
- Availability of libvkd3d-shader as a public library.
- Support for tessellation shaders.
- Version 1.1 root signatures.
- Stream output support.
The source is
2003 Feb 27
4
What's in a name?
Hi,
Let's play a little game. Forget all you know, or think you know.
Without any context at all, what does the following pattern make you think
of?
<p> X -> X X -> X
| ^
v |
X <- X X <- X
| ^
v |
X X -> X X
| ^ | ^
v | v |
X -> X
2017 Jun 12
3
[Mesa-dev] [RFC 0/9] Add precise/invariant semantics to TGSI
This looks like the right idea to me too. It may sound a bit weird to do
that per instruction, but d3d11 does that as well. (Some d3d versions
just have a global flag basically forbidding or allowing any such fast
math optimizations in the assembly, but I'm not actually sure everybody
honors that without tesselation...)
For 1/9:
Reviewed-by: Roland Scheidegger <sroland at vmware.com>