BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  OpenGL and MDI apps          BorlandTalk.com Forum Index -> C++ Builder (Graphics) View previous topic :: View next topic   Author Message Joey Rios Guest Posted: Wed Aug 04, 2004 8:45 pm    Post subject: OpenGL and MDI apps Are there any tutorials/references/samples of projects using OpenGL in an MDI application available online? I am trying to get various child windows to have there own OpenGL stuff going on. I have gotten child windows to draw a box when they are created, but have trouble when switching between various open windows. This is my first Builder and first OpenGL project, so any advice would be appreciated. Thanks in advance. Joey Back to top Bruce Salzman Guest Posted: Thu Aug 05, 2004 12:43 am    Post subject: Re: OpenGL and MDI apps Quote: Are there any tutorials/references/samples of projects using OpenGL in an MDI application available online? I am trying to get various child windows to have there own OpenGL stuff going on. I have gotten child windows to draw a box when they are created, but have trouble when switching between various open windows. This is my first Builder and first OpenGL project, so any advice would be appreciated. Thanks in advance. Joey Hi, Joey Here are my tips: The internal state of the OpenGL library is global to the machine. You have to manage resources to make sure that you render the correct display lists to the proper rendering contexts. Use glGenLists() to generate your display list numbers. They need to be unique. Call wglMakeCurrent() before rendering. Call glFlush(); and GdiFlush(); after rendering your window. Regards, Bruce Back to top Joey Rios Guest Posted: Sat Aug 07, 2004 8:57 pm    Post subject: Re: OpenGL and MDI apps Quote: Hi, Joey Here are my tips: The internal state of the OpenGL library is global to the machine. You have to manage resources to make sure that you render the correct display lists to the proper rendering contexts. Use glGenLists() to generate your display list numbers. They need to be unique. Call wglMakeCurrent() before rendering. Call glFlush(); and GdiFlush(); after rendering your window. Regards, Bruce Thanks Bruce. I think I am using my wglMakeCurrent() and glFlush() correctly thus far. Haven't heard of GdiFlush() so will look into it. My problem right now is that I can get any number of child windows that render a scene (just a green box on a white background) and while the current child window keeps itself refreshed properly through resizing and moving, all the obscured windows won't refresh themselves until I make them active. I am guessing that I need to have the parent window do some sort of stepping through its children and refresh them, but I could easily be wrong. Any advice on this? Yours appreciatively, Joey Back to top Bruce Salzman Guest Posted: Mon Aug 09, 2004 1:34 pm    Post subject: Re: OpenGL and MDI apps Quote: I think I am using my wglMakeCurrent() and glFlush() correctly thus far. Haven't heard of GdiFlush() so will look into it. My problem right now is that I can get any number of child windows that render a scene (just a green box on a white background) and while the current child window keeps itself refreshed properly through resizing and moving, all the obscured windows won't refresh themselves until I make them active. I am guessing that I need to have the parent window do some sort of stepping through its children and refresh them, but I could easily be wrong. Any advice on this? Try setting the window style bits WS_CLIPSIBLINGS and WS_CLIPCHILDREN in your MDI Child windows. Regards, Bruce Back to top Joey Rios Guest Posted: Wed Aug 11, 2004 8:39 am    Post subject: Re: OpenGL and MDI apps Quote: Try setting the window style bits WS_CLIPSIBLINGS and WS_CLIPCHILDREN in your MDI Child windows. Thanks again for the reply Bruce, I have found a reference to these flags in the Win32 Help provided with Builder, but can't see how to set them as they seem to normally be passed in the CreateWindow function in the windows API. I guess Builder hides the call to that function well enough to keep me from figuring out how to get those bits set. I know I may be running the risk of sounding totally ignorant, but that hasn't stopped me yet! Where do I set these flags? Or better yet, is there somewhere you could point me to learn a little more about these topics? How do you guys know all this stuff!? This is still my first Builder and first OpenGL project and I GREATLY appreciate your help... Joey PS: I think a lot of these questions might be cleared up if there were a good OpenGL MDI example app somewhere. Anyone know where a newb like me can find such a thing? No success hunting on my own... Back to top Bruce Salzman Guest Posted: Thu Aug 12, 2004 3:16 am    Post subject: Re: OpenGL and MDI apps Quote: I have found a reference to these flags in the Win32 Help provided with Builder, but can't see how to set them as they seem to normally be passed in the CreateWindow function in the windows API. I guess Builder hides the call to that function well enough to keep me from figuring out how to get those bits set. Add this function to your MDIChild class: void __fastcall TMDIChild::CreateParams(Controls::TCreateParams &Params) { TForm::CreateParams(Params); Params.ExStyle |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN; } CreateWnd() calls this function before creating the window. Quote: I know I may be running the risk of sounding totally ignorant, but that hasn't stopped me yet! Where do I set these flags? Or better yet, is there somewhere you could point me to learn a little more about these topics? How do you guys know all this stuff!? This is still my first Builder and first OpenGL project and I GREATLY appreciate your help... Don't worry, if you do this long enough you'll gradually soak it up :^). I think I used www.msdn.microsoft.com when I first attempted OpenGL. And www.opengl.org is full of good stuff. Regards, Bruce Back to top Bruce Salzman Guest Posted: Thu Aug 12, 2004 3:19 am    Post subject: Re: OpenGL and MDI apps That should be Params.Style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN; Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (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.