robertosfield wrote:
> Hi Franco,
>
>
> On Tue, 10 Sep 2019 at 03:23, Franco Tang < ()> wrote:
>
>
> > I guess that some code in osg is out-of-date and it's a bit diffcult to
> > mantain the community. However, I believe they had done pretty good work.
> >
>
>
> It's not so much that the OSG code is out-of-date, more that a range of
> different approaches to doing shadows, which approach works best is very
> data/application specific so general purpose shadow code that osgShadow
> provide can fall short, simply because it doesn't know what going to be best
> for you scenes. It's also a bit out-of-date too though :-)
>
>
>
> For some scene types you might well find that one of osgShadow
> ShadowTechnique implementations does actually work well for your scenes, if
> so, great go an use it.
>
>
> However, I would recommended learning about shadowing can be done in modern
> hardware and modern extensions. Then see what approaches might provide the
> best visual quality/perfornance for your datasets. Most modern applications
> will also be writing your own shaders, so shadows is something would fit
> within this well. It does require more knowledge but the results have the
> potential for being better.
>
>
>
> Robert.
>
> ------------------
> Post generated by Mail2Forum
Today, it's my first time to debug my application using gDebugger. I am using
Intel HUD Graphics 630 card. The origin fragment shader of osgShadow::ShadowMap
is below:
Code:
uniform sampler2D osgShadow_baseTexture;
uniform sampler2DShadow osgShadow_shadowTexture;
uniform vec2 osgShadow_ambientBias;
void main(void)
{
vec4 color = gl_Color * texture2D( osgShadow_baseTexture, gl_TexCoord[0].xy
);
gl_FragColor = color * (osgShadow_ambientBias.x + shadow2DProj(
osgShadow_shadowTexture, gl_TexCoord[1], 0.005) * osgShadow_ambientBias.y);
}
There is no version directive and I failed to build the shader program cause no
support for "gl_Color" in glsl140 or later. Then I set the version glsl130 or
below. I failed to validate shader program. I guess it's card driver stuff
especially using Intel Card.
I build osg3.4.1 with default option.
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=76667#76667
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