search for: bezier

I'm trying to use R to determine the quality of a cubic Bezier curve approximation of an elliptical arc. I know the four control points and I want to compute (x,y) coordinates of many points on the curve. I can't find anything in either the base distribution or CRAN that does this; all the spline-related packages seem to be about *fitting* piecewise Bezie...

Hi dear all, I am wondering if there is a function existing in R that did the quadratic bezier curve interpolation? I hope to generate a bezier curve based on three sets of points: two end of the line and a control point. Thanks in advance. Tengfei -- Tengfei Yin MCDB PhD student 1620 Howe Hall, 2274, Iowa State University Ames, IA,50011-2274 [[alternative HTML version deleted]]

...be 4, and I wanted to see how the physics look like with grid sizes that aren't 4x4. I changed the defines to my new grid size, but unfortunately it didn't work. I investigated this "bug" (it's not exactly a bug because users can't change the grid size), and found out the bezier patch was written for specifically 4x4 grids. The attached patch makes the bezier patch to work on every grid size defined (grid sizes could even be an option, although i think 4x4 indeed gives the best effect). Thanks, Roi. -------------- next part -------------- A non-text attachment was scrubbe...

Does anyone know how to do hermite or Bezier splines in R? I can find Matlab routines, but really need to implement them in R. Failing that I'd be interested in other conformal splines. I need to smooth and interpolate animal tracking data. Antarctic Wildlife Research Unit School of Zoology University of Tasmania PO Box 252-05 Hoba...

The Wine development release 2.15 is now available. What's new in this release (see below for details): - Support for AES encryption. - Improved Bezier support in Direct2D. - Chunked transfer improvements in WinInet. - Various bug fixes. The source is available from the following locations: http://dl.winehq.org/wine/source/2.x/wine-2.15.tar.xz http://mirrors.ibiblio.org/wine/source/2.x/wine-2.15.tar.xz Binary packages for various distri...

Hello, I'm a grad. student in statistics and am looking for some information on how R draws its contours. I suspect you are using a Bezier spline. I have the C code but am curious about how it works. Riley A. Metzger University of Waterloo Waterloo, Ontario, N2L 3G1 (519) 888-4567 Ext. 3715 rileymetzger at alumni.uwaterloo.ca

...DGRAPHVIZ_MAJOR=2 -DGRAPHVIZ_MINOR=20 -DWin32 -O2 -Wall -std=gnu99 -c agwrite.c -o agwrite.o x86_64-w64-mingw32-gcc -I"C:/PROGRA~1/R/R-213~1.0/include" -IC:/BenSave/GoodiesW in64/graphviz/include/graphviz -DGRAPHVIZ_MAJOR=2 -DGRAPHVIZ_MINOR=20 -DWin32 -O2 -Wall -std=gnu99 -c bezier.c -o bezier.o x86_64-w64-mingw32-gcc -I"C:/PROGRA~1/R/R-213~1.0/include" -IC:/BenSave/GoodiesW in64/graphviz/include/graphviz -DGRAPHVIZ_MAJOR=2 -DGRAPHVIZ_MINOR=20 -DWin32 -O2 -Wall -std=gnu99 -c buildEdgeList.c -o buildEdgeList.o x86_64-w64-mingw32-gcc -I"C:/PROGRA~1/R/R-213...

...th parameters (alpha = 1.85342, beta = 348.18) The Time marginal has been fitted through a Weibull curve with parameters (alpha = 0.334489, beta = 9.14066) The scaling factor = 1403.88. My goal is: 1. to generate and plot the 2D surface which is generated by the product of the two curves (like Bezier surfaces) 2. to generate a 3D stairsplot of the above table 3. *ideally* to draw the generated product surface *and* the 3D stairplot in the same plot I had a look at graphic functions (persp, plot3D, sctterplot3d) but I feel intimidated. I have to sample somehow the two curves to generate the p...

...viz needs to link to the graph.dll from graphviz, E:\paboyoun>..\biocbld\bbs-2.4-bioc\R\bin\R CMD build Rgraphviz [...omitting output...] ** libs making DLL ... [...omitting output...] gcc -shared -s -o Rgraphviz.dll tmp.def LL_funcs.o Rgraphviz.o RgraphvizInit.o agopen.o agread.o agwr ite.o bezier.o buildEdgeList.o buildNodeList.o doLayout.o graphvizVersion.o init.o -LC:/Graphviz2.22/ bin -lgvc -lgraph -lcdt -Le:/biocbld/bbs-2.4-bioc/R/bin -lR [...omitting output...] but at run time R dispatches to the graph.dll from the graph package to resolve the symbols. R-2.9> Sys.which("gra...

...ror state when adding the vertex fails in d2d_geometry_sink_BeginFigure(). d2d1/tests: Make the window client rect match the DXGI swapchain dimensions. d2d1/tests: Introduce a helper function to add lines to a geometry sink. d2d1/tests: Introduce a helper function to add quadratic bezier curves to a geometry sink. d2d1: Properly test which side of a bezier curve is the inside. d2d1: Introduce a separate structure for fill specific geometry fields. d2d1: Store separate bezier vertices. d2d1: Use d2d_point_set() in d2d_rectangle_geometry_init(). Hugh McMaster...

...): autogen: add default patch prefix Peter Hutterer (9): Ignore LED updates for disabled devices Add a comment regarding scroll dist default values Move axis value calculation into a helper function Calculate the required scroll distance based on the angle Add a bezier curve implementation Implement stylus pressure curve support Add tablet tool area ratio property Drop unnecessary function declaration xf86-input-libinput 0.24.0 git tag: xf86-input-libinput-0.24.0 https://xorg.freedesktop.org/archive/individual/driver/xf86-input-libinput-...

...implement the solution in S. There are a lot of spline algorithms and I am looking for some direction on what is most appropriate. I need a spline that can be made to extrapolate certain data points as described below. Of course it needs to happen algorithmically as I have lots of this data. Can a Bezier be fit to data? Consider a material volume sampled in discrete non-uniform intervals. There is a continuous trend in properties that is integrated over each interval. We are aware of the specific form of the continuous trend, but it is concealed by the interval nature of the data. The specific...

Hello All, I am in need of sample code to create gnuplot's sbezier output in numerical form. Below are some details of what I have done. I just fed 2000 lines of data to the above gplot script and it seg faulted, when I cut the data down it down it worked fine. The results are very good for the purpose, which is to give a guestimation as to what fills the sp...

...drwxrwxrwx 15 gaio domain users 272 28 nov 15.49 gaio.V2 drwxrwxrwx 15 gaio sa 4096 28 nov 14.47 gaio.V2.good drwxrwxrwx 17 gaio sa 4096 4 nov 11.57 gaio.V6 This seems a little strange and dangerous to me. What i'm missing?! Thanks. -- Stiamo arrivando a Beziers. Attento alle curve. (Claudio, in auto con Igor diretto in Spagna)

...ibute one's own changes. (Google SoC project) * Pressure and Tilt Sensitivity: The calligraphy tool may now use a tablet pen with pressure and tilt support to vary the width and angle of a calligraphic stroke. * Better Node Editing: One may freely drag, bend, and stretch a Bezier curve by any point and not only by a node. Also, one may easily add a new node at any point on the curve. * New Extensions: There are now extensions for envelope distortion, whirling, and adding nodes. * Refinements: Inkscape now supports improved precision, expanded li...

Hello, I am author of a Morse code training software written in Perl at http://starling.ws/morse Currently I output to *.wav and, if on Unix, convert to *.ogg. And that's okay for a trainer. But I have desire to upgrade the project to a real-time communication tool...or at least a Morse code audio mail routine. And I should like to avoid *.wav. I'd like some means of writing a pure

...st. > * The way the DC classes are designed are great but: > ??? - FXDCPrint is just way too buggy and incomplete.? It probably > should be removed from the release (or a word of warning in the docs > should be present) > ??? - FXDC is in serious need of supporting: > ??? ??? * bezier/bspline drawing > ??? ??? * hit testing > ??? ??? * FXDCWindow''s with double buffering (sans opengl) > ????? Three things that are relatively common in other toolkits (Tk, > FLTK, etc). These are again shortcomings of FOX itself. You can report them to the foxgui-users list...

Hello all, I discovered that the pdf device uses fonts to represent "points" symbols (as in plot(...,type="p",...) ). Namely it uses ZapfDingbats with symbol U+25cf. This can lead to problems when the font is not available, or available in another version (such as points being replaced by other symbols, or worst: slightly displaced). Furthermore, it also causes

...itialization to a separate function, add another ScriptShape() test. usp10/tests: Remove workarounds that are no longer useful. shell32: Implement Application() property for Folder and FolderItems. dwrite/tests: Added a helper to initialize test text source. d2d1: Use better bezier segment bounds approximation when updating figure bounds. d2d1: Implement GetBounds() for path geometries. d3d9: Ask for texture GetDC() capability GET_DC based on texture format instead of initial swapchain buffer format. shell32/tests: Remove workarounds that are no longer relev...

...8.1. Nikolay Sivov (38): d3d9/tests: Test for GetDC()-capable backbuffer created with D3DFMT_UNKNOWN format. shell32: Implement Parent() property for ShellDispatch objects. shell32: Added remaining Application() properties. d2d1: Improve figure bounds updating for quadratic beziers. gdiplus: Implement playback for EmfPlusRecordTypeSetPixelOffsetMode. gdiplus: Implement playback for EmfPlusRecordTypeSetCompositingQuality. gdiplus: Implement playback for EmfPlusRecordTypeSetInterpolationMode. d3d9/tests: Some tests for D3DPRESENTFLAG_LOCKABLE_BACKBUFFER...