Thanks to all who responded. This is obviously a topic many are interested in. The responses were helpful. I now have a working algorithm that captures images at regular intervals. I'm attaching the code if anyone would like to see.
Raffi -----Original Message----- From: Ewan Borland [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 16, 2002 4:39 PM To: [EMAIL PROTECTED] Subject: Re: [JAVA3D] Capturing the Canvas3D Image Hi, I too get blank images using this approach but I have successfully captured using the standard methods. I think the problem might be that you are keeping the buffered images until the IOThread writes them out. I seem to remember someone posting that buffered images retrieved in this way still get updated by the renderer. If that is the case then your IOThread is simply writing out the current frame at whatever stage it's at. Since your IOThread is independent of the rendering loop it's not surprising that you very rarely get a complete image - since it's rather unlikely that your writing of the image will correspond to the postSwap() part of the rendering loop every time. The approach I've used(which seems to work for me) is either to write out the image in the postSwap() method or to extract the data from the buffered image and store it somewhere else until you're ready to write it out (again this is done in the postSwap() method). Hope I've been some help, Ewan ---------------------------------------------------------------------------- ----- Ewan Borland BSc(hons) Computing Science and Mathematics University of Glasgow [EMAIL PROTECTED] [EMAIL PROTECTED] ---------------------------------------------------------------------------- ----- ----- Original Message ----- From: "Kasparian, Raffi J." <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, July 16, 2002 6:10 PM Subject: Re: [JAVA3D] Capturing the Canvas3D Image > I should follow this up by saying that I'm using Java 1.4.1b, Java3D > 1.3, NT4, Pentium III, 800 mhz processor, 384G RAM. > > -----Original Message----- > From: Kasparian, Raffi J. [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, July 16, 2002 11:38 AM > To: [EMAIL PROTECTED] > Subject: [JAVA3D] Capturing the Canvas3D Image > > > I am not having great success with the tried and true image capture > routines. Sometimes images are captured correctly and other times only > partial images are generated. When capturing every frame drawn, performance > is severely degraded and many times the Canvas3D itself only shows > partial or blank images. I tried putting the IO routines in a separate > thread to which I simply pass the postSwap-captured images but > performance remains bad > and the captured images are no better. I changed HelloUniverse to > capture every frame to disk and am attaching my two source files. Two > buttons "Start > Capturing" and "Stop Capturing" control the capture process. (Images > are saved to the folder "C:/CaptureHelloUniverse". Please, someone, > let me know > if I am doing something wrong or try the program out on your computers > to see if it works better on your systems. The boolean variable > useIOThread in > CaptureCanvas3D can be changed and the program recompiled to change > from handling the IO in the same thread as postSwap or in a different > thread. > > Thanks, > > > Raffi > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send > email to [EMAIL PROTECTED] and include in the body of the message > "help". > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
CaptureHelloUniverse.java
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CaptureCanvas3D.java
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