search for: tesselate

Displaying 20 results from an estimated 39 matches for "tesselate".

Did you mean: 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
Hello R Users, I am trying to do a quadrat count defined by covariate properties in spatstat. I have read my elevation raster into R (from ascii) and converted to class "im" for use in spatstat. Now I have point data of class "ppp" which window is the same extent as the elevation image. I can conveniently plot the image and the points on the image as follows:
2010 Oct 20
0
Spatstat: tessellation problems.
Hello R Users, I am trying to do a quadrat count defined by covariate properties in spatstat. I have read my elevation raster into R (from ascii) and converted to class "im" for use in spatstat. Now I have point data of class "ppp" which window is the same extent as the elevation image. I can conveniently plot the image and the points on the image as follows:
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>