I just had a quick look through the ARB_vertex_program extension documentation, but it's a bit hard to interpret...
> If a vertex attribute binding matches "vertex.weight" or > "vertex.weight[n]", the "x", "y", "z", and "w" components of the vertex > attribute variable are filled with vertex weights <n> through <n>+3, > respectively. If "[n]" is omitted, weights zero through three are used. > For the purposes of this binding, all weights supported by the > implementation but not set by the application are set to zero, including > the extra derived weight corresponding to the fixed-function > WEIGHT_SUM_UNITY_ARB enable. For components whose corresponding weight is > not supported by the implementation (i.e., numbered MAX_VERTEX_UNITS_ARB > or larger), "y" and "z" components are set to 0.0 and "w" components are > set to 1.0. A vertex program will fail to load if a vertex attribute > binding specifies a weight number <n> that is greater than or equal to > MAX_VERTEX_UNITS_ARB or is not divisible by four. I'm not exactly sure what this means for default values, so I'll leave that up to someone more knowledgeable, but I am against committing game-specific fixes/hacks to core Mesa or the drivers. On 3/10/08, Markus Amsler <[EMAIL PROTECTED]> wrote: > Chris Rankin wrote: > > --- Markus Amsler <[EMAIL PROTECTED]> wrote: > > > >> Wow depends on weight=(1,0,0,0) or vertex.weight=vertex.generic1 in its > >> vertex shaders. > >> > > > > Hi, > > > > Just to be pedantic, what kind of mis-rendering does this patch fix? > > > It fixes displaced vertices if vertex shaders are enabled in opengl > mode. Like the flag in [1] or the character in [2]. To enable vertex > shaders you also need the [Mesa3d-dev] [PATCH] vp: Only set inputs if > actually used. patch, otherwise the gpu locks up. I'm currently playing > with enabled vertex shaders without any shader related issues. > > Markus > > [1] http://oribi.org/linux/mesa/wow_flag.png > [2] http://img201.imageshack.us/img201/513/warcraftcp4.jpg > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Mesa3d-dev mailing list > Mesa3d-dev@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mesa3d-dev > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
