Hi Yanling, You seem to be fighitng the API. For HUD's you really shouldn't need to mess around with the compute near far too much - simply disable the depth test, or do a depth clear at the begining of the HUD.
Robert. On 8/8/06, Yanling Liu <[EMAIL PROTECTED]> wrote:
Hi, just want you to know when using Fox toolkit 1.6.6 with Producer::RenderSurface and osgUtil::SceneView, there may be a problem with HUD..... I have created a CameraNode for HUD following the osgHud example. I have to manually set m_hudNode->setComputeNearFarMode(osg::CullSettings::ComputeNearFarMode::DO_NOT_COMPUTE_NEAR_FAR); otherwise the near/far limit won't be correct and triangles close together will be rendered incorrectly. Please see attached z_buffer.gif. Here is the history of the HUD problem I have encountered.. 1. osg 0.9.9, created HUD using Projection and MatrixTransform, no problem at all 2. osg 1.0, created HUD using CameraNode, has to set DO_NOT_COMPUTE_NEAR_FAR, otherwize broken trackball control (after you move scene behind the camera, you cannot move it back) 3. osg 1.1, created HUD using CameraNode, need to switch from FXGlcanvas to Producer::RenderSurface, otherwise a black window will be shown when using HUD, also has to set DO_NOT_COMPUTE_NEAR_FAR, otherwise there is rendering problem related to z-buffer (z-buffer range too large to correctly render closer triangles). Tired with the HUD thing... It may be a compatibility problem with sceneview and fox toolkit... Regards, Yanling _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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