Subject:
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Re: video card
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Newsgroups:
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lugnet.cad.dev.mac
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Date:
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Mon, 25 Feb 2002 14:13:46 GMT
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Viewed:
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2650 times
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"Don Heyse" <dheyse@hotmail.spam.go.away.com> writes:
> In lugnet.cad.dev.mac, Mark Abrams writes:
> > Here is the printout at startup.
> >
> > GL_VERSION = 1.1 APPLE-1.1 GL_EXTENSIONS = GL_APPLE_specular_vector
> > GL_APPLE_transform_hint GL_APPLE_packed_pixel GL_APPLE_client_storage
> > GL_ARB_transpose_matrix GL_EXT_clip_volume_hint GL_EXT_rescale_normal
> > GL_NV_texgen_reflection GL_IBM_rasterpos_clip GL_ARB_texture_env_add
> > GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract
> > GL_EXT_texture_lod_bias GL_EXT_abgr GL_EXT_bgra GL_SGIS_texture_edge_clamp
> > GL_ARB_multitexture GL_ARB_texture_env_combine GL_ARB_texture_env_dot3
> > GL_VENDOR ='Apple' GL_RENDERER ='Generic' GL_RGBA_BITS: (5, 5, 5, 0)
> > GL_DEPTH_BITS = 16 GL_STENCIL_BITS = 8 Buffer Swap Mode = 0
> > Editing mode = 1{0}
> >
> > If this sounds buggy, then it may be a good place for me to start with the
> > debugger. I borrowed a copy of 'OpenGL Progamming Guide' and a book on
> > Graphics Programming algorithims.
>
> Before you debug, I'd try all 4 of (-le, -ledit, -LE, and -LEDIT)
I have tried all 4. The differences are subtle, I'm not sure I see them all.
I like -le the best because I can see the entire model on each refresh.
> to see which methods have problems. Then comment out this line in
> main.c and recompile:
>
> #define USE_OPENGL_STENCIL
I commented this out but it did not make the trailing go away.
I can always get the trails if the first thing I do when I open the app is to
move a part. After that, the trails go away completely. It is actually worse
when I can't see any trails, because I don't know where the piece has gone.
>
> This might fix the wireframe droppings at the cost of some speed.
>
> The problems with editing mode all stem from the fact that opengl is
> not setup to do this sort of thing without resorting to extensions.
> It's very slow to make copies of the various buffers if you just want
> to move one little piece around without redrawing everything. The
> autocad folks added the KTX_buffer_region extension so you could
> backup the buffers quickly in unused video memory, and nowadays the
> pbuffers extension is starting to catch on for this as well. You
> have neither available, so I resort to a trick using the stencil
> buffer as something of a cache for the depth buffer. I've had
> problems with this on the nvidia TNT, and now perhaps on your setup.
> Compiling out the use of the stencil buffer might fix it.
>
> I wish I could find some info on that GL_APPLE_client_storage
> extension. It has a promising sounding name.
That does sound promising.
Mark
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Message has 1 Reply:
 | | Re: video card
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| (...) You could also try adding this: if ((!strcmp(verstr, "1.1 APPLE-1.1")) && (!strcmp(vendstr, "Apple")) && (!strcmp(rendstr, "Generic")) ) { printf("Stencil buffer disabled for XOR with Apple driver.\n"); // Generic Apple driver has problem with (...) (24 years ago, 26-Feb-02, to lugnet.cad.dev.mac)
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Message is in Reply To:
| | Re: video card
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| (...) Before you debug, I'd try all 4 of (-le, -ledit, -LE, and -LEDIT) to see which methods have problems. Then comment out this line in main.c and recompile: #define USE_OPENGL_STENCIL This might fix the wireframe droppings at the cost of some (...) (24 years ago, 23-Feb-02, to lugnet.cad.dev.mac)
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