/*! \fn SoXipGLSLUniformGroup::doAction(SoAction * action)
* Adds a node to the SoXipGLSLUniformGroupElement in the current state
* \param action - the current state action, no action taken if input action is NULL
* \return void
*/
void SoXipGLSLUniformGroup::groupUpdate(SoAction * action)
{
SoChildList * children = this->getChildren();
GLint prg = SoXipGLSLShaderProgramElement::get(action->getState());
if (mNumPrograms > GLSL_MAX_NUM_SHADERS)
{
SoDebugError::postWarning(__FUNCTION__, "supports %i shaders (requested %d)", GLSL_MAX_NUM_SHADERS, mNumPrograms);
mNumPrograms = GLSL_MAX_NUM_SHADERS;
}
for (int i = 0; i < mNumPrograms; i++)
{
/*
To prevent uniforms from updating every frame
we only update the uniform if the time stamp
of the selected shader is out of date or if
anything has changed among the uniforms such
as names or values.
TODO: This fix do not work since we have no
way of knowing if other instances of this
node also changes the same uniforms. Since
this will not change the timestamp in the
manager the uniform remains as last updated
and fix don't work.
No solution to the problem yet!
Stefan Lindholm
*/
#if 0
int handle = SoXipGLSLShaderProgramElement::getProgramID(action->getState(), prgTags[i].getString());
if (glIsProgram(handle))
{
SoXipGLSLShaderProgramElement::set(action->getState(), prgTags[i].getString());
children->traverse(action);
}
#else
__uint64 currTime = SoXipGLSLShaderProgramElement::getTimeStamp(action->getState(), prgTags[i].getString());
if (currTime != mProgramTimeStamps[i] || mNeedsUpdate)
{
SoXipGLSLShaderProgramElement::set(action->getState(), prgTags[i].getString());
children->traverse(action);
mProgramTimeStamps[i] = currTime;
}
#endif
}
SoXipGLSLShaderProgramElement::set(action->getState(), prg);
mNeedsUpdate = false;
}
/*! \fn SoXipGLSLUniformGroup::doAction(SoAction * action)
* Adds a node to the SoXipGLSLUniformGroupElement in the current state
* \param action - the current state action, no action taken if input action is NULL
* \return void
*/
void SoXipGLSLUniformGroup::doAction(SoAction * action)
{
SoChildList * children = this->getChildren();
children->traverse(action);
}