Hi,
In my quest for food (i.e. lunch), I failed to mention what I have tried. I
create a 2D texture like:
m_DepthTexture = new osg::Texture2D();
m_DepthTexture->setInternalFormat(GL_DEPTH_COMPONENT);
m_DepthTexture->setShadowComparison(true);
m_DepthTexture->setShadowTextureMode(osg::Texture::LUMINANCE);
m_DepthTexture->setFilter(osg::Texture2D::MIN_FILTER,
osg::Texture2D::LINEAR);
m_DepthTexture->setFilter(osg::Texture2D::MAG_FILTER,
osg::Texture2D::LINEAR);
m_DepthTexture->setTextureSize(width, height);
m_CameraNode->attach(osg::CameraNode::DEPTH_BUFFER, m_DepthTexture);
Then I associate a texture environment with my geometry that I'll be
applying the shader to:
osg::ref_ptr<osg::TexEnv> texenv = new osg::TexEnv;
texenv->setMode(osg::TexEnv::DECAL);
m_Geometry->getOrCreateStateSet()->setTextureAttribute(1,texenv.get());
I set up my shader uniform as a osg::Uniform::SAMPLER_2D_SHADOW and assign
it the appropriate texture unit.
I am also attaching a osg::CameraNode::COLOR_BUFFER to the same camera node
with an appropriate texture.
Finally, I've got a simple shader program that I'm trying to use.
uniform sampler2DShadow texDepth;
void main()
{
vec4 shadow = shadow2D(texDepth, gl_TexCoord[1]);
gl_FragColor = shadow;
}
Regardless as to what my scene contains, the shader output is always pure
white. However, if I remove the shader portion, the scene renders fine.
There are no debug output errors that I have seen. The FBO is created fine.
If anyone has any insight into this problem, I'd really appreciate it.
Thanks,
Brian
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, February 12, 2007 11:12 AM
Subject: [osg-users] Question about osgdepthshadow example.
Hi,
I'm trying to modify this example slightly so that only the depth buffer
portion is rendered. The shadow is cool, but is there a way to just
render
the depth buffer?
Thanks,
Brian
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