Lesson 46 problem
May 10, 2005 10:14 AM
I've a problem with lesson 46. My card can't recognize "wgl_ARB_multisample" extension. I've a radeon 9250, so it should support multisampling. The card is installed correctly.
If anybody could help me or suggest a great tutorial about OpenGL and Multisampling I would thank it.
thx
May 10, 2005 11:00 AM
The name string could be any of the following:
GL_ARB_multisample
GLX_ARB_multisample
WGL_ARB_multisample
All of the Radeons should support the extension under GL_ARB_multisample name string.
GL_ARB_multisample
GLX_ARB_multisample
WGL_ARB_multisample
All of the Radeons should support the extension under GL_ARB_multisample name string.
May 11, 2005 03:54 AM
Thx help but I can't resolve the problem.
I've tried to get available extensions both with "wglGetExtString" and "glGetString(GL_EXTENSIONS)" but neither result contains any multisample extension. I've also called "glGetIntegerv" with GL_SAMPLES and GL_SAMPLEBUFFERS and both of them is 0. It seems that I can't force my card to support multisampling :(
I've look through display control panel and didn't find any switch regarding to multisampling or FSAA. However, my purpose is to handle everything inside my program because I can't ask my users to switch it manually.
I've been examining forums and helps for nearly a full day and I'm getting totally confused about this topic. If anybody could give me a tutorial about multisample antialiasing from baseline I would be grateful.
Thx.
I've tried to get available extensions both with "wglGetExtString" and "glGetString(GL_EXTENSIONS)" but neither result contains any multisample extension. I've also called "glGetIntegerv" with GL_SAMPLES and GL_SAMPLEBUFFERS and both of them is 0. It seems that I can't force my card to support multisampling :(
I've look through display control panel and didn't find any switch regarding to multisampling or FSAA. However, my purpose is to handle everything inside my program because I can't ask my users to switch it manually.
I've been examining forums and helps for nearly a full day and I'm getting totally confused about this topic. If anybody could give me a tutorial about multisample antialiasing from baseline I would be grateful.
Thx.
May 11, 2005 12:05 PM
First the obvious check: first make sure your drivers are up to date.
Second, look up your specific card on delph3d.net, and maybe download and run their detection tool to verify that your card and driver combination support it. http://www.delphi3d.net/hardware/index.php
Next, assuming your updated drivers support the extension, there is was a tutorial at GCD by NVidia on this. See their multisample presentation for the code snippets required, and (I think) a demo with source.
Second, look up your specific card on delph3d.net, and maybe download and run their detection tool to verify that your card and driver combination support it. http://www.delphi3d.net/hardware/index.php
Next, assuming your updated drivers support the extension, there is was a tutorial at GCD by NVidia on this. See their multisample presentation for the code snippets required, and (I think) a demo with source.
May 13, 2005 01:53 AM
I've visited the Delphi3D site and found out that multismapling is supported only by Radeon 9500 and above. I' ve looked for both "GL_ARB_multisample" and "WGL_ARB_multisample" and neither of them is supported under this version. I've tried a GeForce MX440 but it failed, it is one of the few GeForce cards that don't support these extensions. Now i'm tending to give up using multisampling.
The other two methods I've heard about seem to me too cumbersome. I can't use Polygon smooth because I can't sort polygons to build it from front to back. I think the other way using accumulation buffer would slow down my application.
The other two methods I've heard about seem to me too cumbersome. I can't use Polygon smooth because I can't sort polygons to build it from front to back. I think the other way using accumulation buffer would slow down my application.
436
May 13, 2005 03:31 AM
Run lesson 24.
It lists all available extensions on your system(most of them atleast).
It's a pretty handy tool when your dealing with extension programming and stuff.
If that fails, you could allways ignore errorchecking and implement it anyway.
It lists all available extensions on your system(most of them atleast).
It's a pretty handy tool when your dealing with extension programming and stuff.
If that fails, you could allways ignore errorchecking and implement it anyway.
www.flashbang.se | www.thegeekstate.com | nehe.gamedev.net | glAux fix for lesson 6 | [twitter]thegeekstate[/twitter]
122
May 17, 2005 03:20 PM
For knowing the extensions supported you could also try this:
http://www.realtech-vr.com/glview/
Trust me it's pretty good.
http://www.realtech-vr.com/glview/
Trust me it's pretty good.
/* As always forgive (or better forget) my english *//* I promise I will learn! */
May 18, 2005 06:44 AM
I've tried all of the three detection application and none of them found any multisampling extension. Yesterday I tried a 4 years old GeForce3 and it supported multisampling. My only question is that how is antialiasing implemented on Radeon cards under version 9500. I've just tried out the accumulation buffer method. It looks smart but my program become so slow that it is untreatable.
394
May 18, 2005 11:33 AM
You could try rendering to multiple buffers and jittering the results, not really my area but that ring a bell.
Yeah, the accumulation buffer seems to be always implemented in software so without the hardware support it's awfully slow. I'm not sure if any card supports a hardware accumulation buffer, I'm sure someone who knows will be able to provide an answer.
/edit: Damn beer makes my spalling bed.
Yeah, the accumulation buffer seems to be always implemented in software so without the hardware support it's awfully slow. I'm not sure if any card supports a hardware accumulation buffer, I'm sure someone who knows will be able to provide an answer.
/edit: Damn beer makes my spalling bed.
--
Cheers,
Darren Clark
Cheers,
Darren Clark
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