Hi Jason,
On a quick pass I can't spot why the image isn't getting updated. The
osgprerender example has usage of
a colour buffer being grabbed once per frame and this certainly works try:
osgprerender cow.osg --image
Perhaps this example can help you.
Robert.
On Mon, Apr 28, 2008 at 8:06 PM, Jason Ziglar <[EMAIL PROTECTED]> wrote:
> I've got a camera set up to perform a pre-render pass, so I can generate
> a shadow map for the scene of interest. I have verified that the camera
> is running via the PostDrawCallback, but the resulting image is the same
> even though the scene is changing between images. The PostDrawCallback
> merely calls dirty() on the image - this code results in a static image.
> Anyone have any clues what is wrong with this code?
>
> Thanks in advance,
>
>
> ref_ptr<Camera> m_prerenderCamera;
> ref_ptr<Image> m_shadowImage;
> ref_ptr<Texture2D> m_shadowMap;
> const int TextureSize = 1024;
>
> m_prerenderCamera->setRenderTargetImplementation(Camera::FRAME_BUFFER_OBJECT);
> m_prerenderCamera->setClearColor(Vec4(1.0f, 0.0f, 1.0f, 1.0f));
> m_prerenderCamera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
> m_prerenderCamera->setComputeNearFarMode(Camera::DO_NOT_COMPUTE_NEAR_FAR);
>
> m_prerenderCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
> m_prerenderCamera->setProjectionMatrixAsPerspective(90.0, 1024.0/768.0,
> 1.0, 100.0);
> m_prerenderCamera->setViewMatrix(Matrix::identity());
> m_prerenderCamera->setViewport(0, 0, TextureSize, TextureSize);
> m_prerenderCamera->setRenderOrder(Camera::PRE_RENDER);
>
> {
> StateSet* ss = m_prerenderCamera->getOrCreateStateSet();
>
> osg::Depth* depth = new osg::Depth;
> ss->setAttributeAndModes(depth, StateAttribute::ON);
> }
>
> m_shadowImage->allocateImage(TextureSize, TextureSize, 1,
> GL_DEPTH_COMPONENT, GL_FLOAT);
>
> m_prerenderCamera->attach(Camera::DEPTH_BUFFER, m_shadowImage.get());
> m_prerenderCamera->addChild(m_maskingScene.get());
>
> m_shadowMap->setImage(m_shadowImage.get());
> m_prerenderCamera->setPostDrawCallback(new CameraCallback(m_shadowImage));
>
> m_shadowMap->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_BORDER);
> m_shadowMap->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_BORDER);
> m_shadowMap->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_BORDER);
> {
> StateSet* ss = m_projectedScene->getOrCreateStateSet();
> ss->setTextureAttributeAndModes(m_shadowUnit, m_shadowMap.get(),
> StateAttrib
> ss->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
> ss->setMode(GL_BLEND, osg::StateAttribute::ON);
> }
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>
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