Hi Rui,
On 15 February 2013 12:39, Wang Rui <[email protected]> wrote:
> So I think we should at least find a way to return the computed near/far
> values to user level, for further debugging and testing. Do you think it a
> better alternative to set the near/far values to the owner camera in
> CullVisitor::popProjectionMatrix()?
>
Could the osg::CullSettings ClampProjectionMatrixCallback be used for this?
/** Callback for overriding the CullVisitor's default clamping
of the projection matrix to computed near and far values.
* Note, both Matrixf and Matrixd versions of
clampProjectionMatrixImplementation must be implemented as the
CullVisitor
* can target either Matrix data type, configured at compile time.*/
struct ClampProjectionMatrixCallback : public osg::Referenced
{
virtual bool
clampProjectionMatrixImplementation(osg::Matrixf& projection, double&
znear, double& zfar) const = 0;
virtual bool
clampProjectionMatrixImplementation(osg::Matrixd& projection, double&
znear, double& zfar) const = 0;
};
This is intended for providing custom computation of the znear and
zfar but you could write a callback that deferred to the
CullVisitor::clampProjectionMatrixImplementation to compute and then
passed back the value to be used however the user wants.
Robert.
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