BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  bezier spline          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message Ivan Sivak Jr. Guest Posted: Mon Aug 22, 2005 10:39 am    Post subject: bezier spline hi, I use a bezier spline as path in my 2d animation, and I'd need to set constant speed, so I'd need to rebuild spline in constant length steps in the same shape as original spline. Do you know any good algorithms or have source for this ? Thanks,Ivan Back to top somebody Guest Posted: Mon Aug 22, 2005 10:51 am    Post subject: Re: bezier spline "Ivan Sivak Jr." <sizesoftware (AT) forex-mhv (DOT) com> wrote Quote: I use a bezier spline as path in my 2d animation, and I'd need to set constant speed, so I'd need to rebuild spline in constant length steps in the same shape as original spline. Do you know any good algorithms or have source for this ? Google for "arclength parametrization". Usually, you just do an approximation and do a binary search to get a uniform enough stepping. Back to top Nils Haeck Guest Posted: Mon Aug 22, 2005 2:00 pm    Post subject: Re: bezier spline Have a look at this page for some background info: http://antigrain.com/research/adaptive_bezier/index.html#PAGE_ADAPTIVE_BEZIER What you can basically do is recursively subdivide the bezier segments in halves until each partial segment has a very small angle with its previous segment. You then simply add up all the line lengths of the partial segments and linearly interpolate in the last partial segment, to get to your new position. By the way, my new Pyro library will have full Delphi source code for this (it's already there). I need it for text-on-a-path functions. Nils Haeck www.simdesign.nl "Ivan Sivak Jr." <sizesoftware (AT) forex-mhv (DOT) com> wrote Quote: hi, I use a bezier spline as path in my 2d animation, and I'd need to set constant speed, so I'd need to rebuild spline in constant length steps in the same shape as original spline. Do you know any good algorithms or have source for this ? Thanks,Ivan Back to top John Guest Posted: Wed Aug 24, 2005 7:13 am    Post subject: Re: bezier spline Quote: By the way, my new Pyro library will have full Delphi source code for this (it's already there). I need it for text-on-a-path functions. Nils, can we have more infos about this lib? thanks John Back to top Nils Haeck Guest Posted: Wed Aug 24, 2005 3:52 pm    Post subject: Re: bezier spline Well, basically Pyro is able to render SVG content, including animations. - It is independent of GDI+ or GDI or any other 3rd party graphics library - Contains complete path filling/stroking for any SVG type of path (lines/ellipses/quadratic and cubic beziers) - Native implementation of TTF loading/font rendering - Import of DXF/PDF/SVG/EMF - Export of DXF/SVG/PDF - Anti-aliasing between 1 and 256 levels (configurable) - Many types of transforms - Many types of bitmap raster effects It is the followup of DtpDocuments, and will be released later this year. Nils Haeck www.simdesign.nl "John" <prout (AT) nospam (DOT) com> schreef in bericht news:430c1e01$1 (AT) newsgroups (DOT) borland.com... Quote: By the way, my new Pyro library will have full Delphi source code for this (it's already there). I need it for text-on-a-path functions. Nils, can we have more infos about this lib? thanks John Back to top HB Guest Posted: Wed Aug 31, 2005 1:39 am    Post subject: Re: bezier spline Hello, when can we see the first demo ? And will Pyro render svg pictures from http://openclipart.org/cgi-bin/navigate What do you mean with TTF loading ?, does it mean we can use all true type fonts which are common on Windows, do you use the freeType-library, or will it have less features ? Do you see your TTF as complete replacement of gdi-text-drawing, or would we still have to use gdi for a text box with multiple styles ? Thank you "Nils Haeck" <bla (AT) bla (DOT) com> schrieb im Newsbeitrag news:430c9689 (AT) newsgroups (DOT) borland.com... Quote: Well, basically Pyro is able to render SVG content, including animations. - It is independent of GDI+ or GDI or any other 3rd party graphics library - Contains complete path filling/stroking for any SVG type of path (lines/ellipses/quadratic and cubic beziers) - Native implementation of TTF loading/font rendering - Import of DXF/PDF/SVG/EMF - Export of DXF/SVG/PDF - Anti-aliasing between 1 and 256 levels (configurable) - Many types of transforms - Many types of bitmap raster effects It is the followup of DtpDocuments, and will be released later this year. Nils Haeck www.simdesign.nl "John" <prout (AT) nospam (DOT) com> schreef in bericht news:430c1e01$1 (AT) newsgroups (DOT) borland.com... By the way, my new Pyro library will have full Delphi source code for this (it's already there). I need it for text-on-a-path functions. Nils, can we have more infos about this lib? thanks John Back to top Nils Haeck Guest Posted: Wed Oct 12, 2005 9:29 pm    Post subject: Re: bezier spline Hi, sorry for the late reply.. didn't notice this message Quote: Hello, when can we see the first demo ? And will Pyro render svg pictures from http://openclipart.org/cgi-bin/navigate What do you mean with TTF loading ?, does it mean we can use all true type fonts which are common on Windows, do you use the freeType-library, or will it have less features ? Do you see your TTF as complete replacement of gdi-text-drawing, or would we still have to use gdi for a text box with multiple styles ? Thank you 1. Yes it renders a lot of examples from openclipart.org perfectly. Some not yet perfectly, notably because SVG filter effects are not yet fully implemented. 2. TTF loading: it will natively load the glyph outlines from the TTF file. It doesn't need GDI to render text or get the outlines. So it is a complete replacement for GDI drawing. There's one exception: I'm thinking of allowing an option to use GDI for hinted drawing of very small font sizes in horizontal text, thus benefitting from Windows ClearType technology. Indeed you can use any TTF font, and Pyro is also able to embed the font data (just the glyphs that are used). 3. I don't use the freetype library, but used it as an example on how to get the TTF font outline data. In future, Type1 fonts will be added too. 4. Demo will be available soon. Nils Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Graphics All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.