search for: tessellation

...it looks at it should. -zubin > > From: Prof Brian Ripley <ripley at stats.ox.ac.uk> > Date: 2006/07/19 Wed AM 03:15:51 EDT > To: Don MacQueen <macq at llnl.gov> > CC: zubin <binabina at bellsouth.net>, r-help at stat.math.ethz.ch > Subject: Re: [R] voronoi tessellations > > On Tue, 18 Jul 2006, Don MacQueen wrote: > > > I'll suggest going to the CRAN packages page and doing a search for "voronoi". > > The problem here is that `Voronoi tessellation' is a secondary name. The > concept has many names, including Dirichle...

...stat) data01 <- read.csv("250810.csv", skip=1) x <- data01[[2]] y <- data01[[3]] data02 <- ppp(x, y, xrange=c(0,512), yrange=c(0,512)) unitname(data02) <- c("pixel", "pixels") plot(data02) #etc etc #I can also import my text images and convert them to a tessellation using the following: a <- read.table("FOLLICLES.txt") win <- owin(c(0,512), c(0,512)) unitname(win) <- c("pixel", "pixels") b <- as.matrix(a, xrange=c(0,512), yrange=c(0,512)) unitname(b) <- c("pixel", "pixels") c <- im(b, xcol=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, or even textbook. TIA, - Jan [[alternative HTML version deleted]]

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 sa...

...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: >plot(elevation, axes=T, col=terrain.colors(20)) >plot(points, add=T, cex=0.5) I have also created a tessellation of the elevation image into 4 categories as follows: >elev.cut<-cut(elevation.im, breaks=elev.quantiles, labels=c("Very low","Low","High","Very High")) >elev.tess<-tess(image=elev.cut) I would like to do a quadrat count to know how many points l...

...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: >plot(elevation, axes=T, col=terrain.colors(20)) >plot(points, add=T, cex=0.5) I have also created a tessellation of the elevation image into 4 categories as follows: >elev.cut<-cut(elevation.im, breaks=elev.quantiles, labels=c("Very low","Low","High","Very High")) >elev.tess<-tess(image=elev.cut) I would like to do a quadrat count to know how many points l...

...omorrow whether this is the cause of my GK208 woes. On Fri, May 22, 2015 at 5:10 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote: > On Mon, May 18, 2015 at 4:48 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote: >> 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...

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

...uveau/nvc0/nvc0_context.h index 09d08e4..f910541 100644 --- a/src/gallium/drivers/nouveau/nvc0/nvc0_context.h +++ b/src/gallium/drivers/nouveau/nvc0/nvc0_context.h @@ -195,8 +195,8 @@ nvc0_shader_stage(unsigned pipe) { switch (pipe) { case PIPE_SHADER_VERTEX: return 0; -/* case PIPE_SHADER_TESSELLATION_CONTROL: return 1; */ -/* case PIPE_SHADER_TESSELLATION_EVALUATION: return 2; */ + case PIPE_SHADER_TESS_CTRL: return 1; + case PIPE_SHADER_TESS_EVAL: return 2; case PIPE_SHADER_GEOMETRY: return 3; case PIPE_SHADER_FRAGMENT: return 4; case PIPE_SHADER_COMPUTE: return 5; -- 2.4.1

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

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"

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,

...ognize SM5+ patch input primitive types. wined3d: Add checkGLcall() to wined3d_unordered_access_view_clear_uint(). wined3d: Ignore dcl_index_range instruction in GLSL backend. d3d11: Make "offsets" optional in d3d11_immediate_context_SOSetTargets(). wined3d: Handle tessellation shaders registers. wined3d: Generate code for domain shaders. d3d11/tests: Port test_clear_state() from d3d10core. wined3d: Invalidate domain shader state regardless of ARB_clip_control support. wined3d: Fill whole structure in find_ds_compile_args(). wined3d: Handle d...

...s 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 includes in particular geometry and tessellation shaders support, various shader translation improvements, as well as various improvements for core Direct3D 12 methods. The source is available from the following location: https://dl.winehq.org/vkd3d/source/vkd3d-1.0.tar.xz The current source can also be pulled directly from the git repositor...

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

...ion 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 complete, but I'm nearing 24 hours with no progress, no messages, etc. The command is essentially splitting the a ppp (marked point pattern) into a tessellation/grid. There are about a couple million points in the pattern and each has a vector of four marks. That said, I processed a similar command with 700,000 points in the pattern (each point with a vector of two marks) yesterday and it took only around 3 hours. Is there anyway I can be certain the co...

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*...

...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 available from the following location: https://dl.winehq.org/vkd3d/source/vkd3d-1.2.tar.xz The current source can also be pulled directly from the git repository: https://source.winehq.org/git/vkd3d.git/ Vkd...

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

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>