Re: [osg-users] Luminance Component Drawing / Camera Defocussing effect
On 7/4/07, Harash Sharma [EMAIL PROTECTED] wrote: Hi Mr. Robert, I understand your plausibility of time, but at least can you indicate if the reduction in frame rate to 1fps when rendering to an image expected. I don't know. Stalling the graphics card? Forcing OpenGL down on to a software rendering? I can't debug your app. Robert. ___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
Re: [osg-users] Luminance Component Drawing / Camera Defocussing effect
Hi Mr. Robert. Thanks for the guidance on this issue. I have gone through the osgDistortion example and was able to render the monochrome image. But my requirement to process the captured image remained as it is. What I tried was: 1. Two Cameras were created -- one that renders the scene to a texture, and a second one that renders the texture on to the screen. But in this case, the accessibility to the image was not available. Next I attached an image object to the rendering camera. This image was set as the texture image and used by the second camera to render the processed image on to the screen. Camera-setPostDrawCallback was used to grab the image at every frame. When I did this, to my amazement, the framerate dropped from around 70 fps to 1 fps. I don't know if what I am doing is proper. If so, then is this drop in framerate expected. I am using 1024x1024 image size and to test I have applied no processing at all. Further, I am using a osgViewer::CompositeViewer. In this I want to have 2 views -- one that renders the usual colored scene while the other one that displays the processed monochrome scene. I am able to create the two views, but would like to take your guidance as to how to dynamically make one of them active while disabling the other one. Thanks in advance. Regards Harash - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. ___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
Re: [osg-users] Luminance Component Drawing / Camera Defocussing effect
Hi Harash, I'm afraid I can't walk you through this, I have time to point you in the direction but no more than this. Robert. On 7/3/07, Harash Sharma [EMAIL PROTECTED] wrote: Hi Mr. Robert. Thanks for the guidance on this issue. I have gone through the osgDistortion example and was able to render the monochrome image. But my requirement to process the captured image remained as it is. What I tried was: 1. Two Cameras were created -- one that renders the scene to a texture, and a second one that renders the texture on to the screen. But in this case, the accessibility to the image was not available. Next I attached an image object to the rendering camera. This image was set as the texture image and used by the second camera to render the processed image on to the screen. Camera-setPostDrawCallback was used to grab the image at every frame. When I did this, to my amazement, the framerate dropped from around 70 fps to 1 fps. I don't know if what I am doing is proper. If so, then is this drop in framerate expected. I am using 1024x1024 image size and to test I have applied no processing at all. Further, I am using a osgViewer::CompositeViewer. In this I want to have 2 views -- one that renders the usual colored scene while the other one that displays the processed monochrome scene. I am able to create the two views, but would like to take your guidance as to how to dynamically make one of them active while disabling the other one. Thanks in advance. Regards Harash Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. ___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/ ___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
Re: [osg-users] Luminance Component Drawing / Camera Defocussing effect
Hi Mr. Robert, I understand your plausibility of time, but at least can you indicate if the reduction in frame rate to 1fps when rendering to an image expected. Thanks Regards Harash Robert Osfield [EMAIL PROTECTED] wrote: Hi Harash, I'm afraid I can't walk you through this, I have time to point you in the direction but no more than this. Robert. On 7/3/07, Harash Sharma wrote: Hi Mr. Robert. Thanks for the guidance on this issue. I have gone through the osgDistortion example and was able to render the monochrome image. But my requirement to process the captured image remained as it is. What I tried was: 1. Two Cameras were created -- one that renders the scene to a texture, and a second one that renders the texture on to the screen. But in this case, the accessibility to the image was not available. Next I attached an image object to the rendering camera. This image was set as the texture image and used by the second camera to render the processed image on to the screen. Camera-setPostDrawCallback was used to grab the image at every frame. When I did this, to my amazement, the framerate dropped from around 70 fps to 1 fps. I don't know if what I am doing is proper. If so, then is this drop in framerate expected. I am using 1024x1024 image size and to test I have applied no processing at all. Further, I am using a osgViewer::CompositeViewer. In this I want to have 2 views -- one that renders the usual colored scene while the other one that displays the processed monochrome scene. I am able to create the two views, but would like to take your guidance as to how to dynamically make one of them active while disabling the other one. Thanks in advance. Regards Harash Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. ___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/ ___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/ - Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
[osg-users] Luminance Component Drawing / Camera Defocussing effect
Hi All, I have a very simple query. I have a 3D Scene that I want to render as monochrome image. In openGL I used to achieve this as follows: 1. Render the scene in RGB color 2. Use GL_LUMINANCE pixel format with glReadPixels to read the monochrome image, 3. Put back this Buffer using glDrawPixels. Do I have to follow the same route in OSG or is there any mechanism using which I can directly render the Luminance component. Another doubt. Is there any construct to model the defocussing / blurring effect of a camera or do we have to apply the same Image Processing techniques (applying a Gaussian filter on the captured image) to model these. I am sorry if the queries are too simplistic, but OSG is so vast that it is difficult to know everything in a short duration, since I am still a novice and at the same time I don't want to redo something. Regards Harash - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.___ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
