FGFS-4.1/OpenSceneGraph
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From Mihai Radu, "After someone asked for a fix for non-textured object appearing black

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with the shader for textured objects. This works very well in cases
where there could be a mix of textured and non-textured objects in the
scene, and it makes the initialization more robust.
The idea is from PSSM, to add a 1pixel texture to the main rendering  as
to provide white for any objects missing textures."
This commit is contained in:
Robert Osfield
2007-12-09 16:06:14 +00:00
parent 2be3992a2f
commit 6ff9810be1
1 changed files with 32 additions and 1 deletions
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33
src/osgShadow/ShadowMap.cpp
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@@ -74,7 +74,7 @@ using namespace osgShadow;
"void main(void) \n"
"{ \n"
" vec4 texResult = texture2D(osgShadow_shadowTexture, gl_TexCoord[0].st ); \n"
" float value = texResult.g - 0.5; \n"
" float value = texResult.r + 0.5; \n"
" gl_FragColor = vec4( value, value, value, 0.8 ); \n"
"} \n";
@@ -253,6 +253,37 @@ using namespace osgShadow;
_stateset->addUniform(itr->get());
}
{
// fake texture for baseTexture, add a fake texture
// we support by default at least one texture layer
// without this fake texture we can not support
// textured and not textured scene
// TODO: at the moment the PSSM supports just one texture layer in the GLSL shader, multitexture are
// not yet supported !
osg::Image* image = new osg::Image;
// allocate the image data, noPixels x 1 x 1 with 4 rgba floats - equivilant to a Vec4!
int noPixels = 1;
image->allocateImage(noPixels,1,1,GL_RGBA,GL_FLOAT);
image->setInternalTextureFormat(GL_RGBA);
// fill in the image data.
osg::Vec4* dataPtr = (osg::Vec4*)image->data();
osg::Vec4 color(1,1,1,1);
*dataPtr = color;
// make fake texture
osg::Texture2D* fakeTex = new osg::Texture2D;
fakeTex->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
fakeTex->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
fakeTex->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
fakeTex->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
fakeTex->setImage(image);
// add fake texture
_stateset->setTextureAttribute(_baseTextureUnit,fakeTex,osg::StateAttribute::ON);
_stateset->setTextureMode(_baseTextureUnit,GL_TEXTURE_1D,osg::StateAttribute::OFF);
_stateset->setTextureMode(_baseTextureUnit,GL_TEXTURE_2D,osg::StateAttribute::ON);
_stateset->setTextureMode(_baseTextureUnit,GL_TEXTURE_3D,osg::StateAttribute::OFF);
}
}
_dirty = false;