[osg-users] Effecting MatrixTransform matrix change

[OpenSceneGraph Users]

On Thu, May 28, 2020 at 10:11 AM OpenSceneGraph Users <
osg-users at lists.openscenegraph.org> wrote:

> Hello everyone! This must be a simple one... I have a node that has one
> parent which is a MatrixTransform. I simply need to move the child node to
> a specific location that is computed at run time. I figured I just needed
> to do the following, but this caused no change in the location of the node:
>
> const osg::Matrix OriginalParentMatrix =
> pParentMatrixTransform->getMatrix();
>
> osg::Matrix TranslateContribution;
> TranslateContribution.makeTranslate(10.0f, 0.0f, 0.0f);
>
> const osg::Matrix FinalNewMatrix = (OriginalParentMatrix *
> TranslateContribution);
>
> pParentMatrixTransform->setMatrix(FinalNewMatrix);
>
> No matter what translation I set in makeTranslate(), the child node
> doesn't move. Is there some call I'm missing to cause the new matrix to
> take effect on the node's parent matrix transform? Thank you in advance!
>
> Make sure that the data variance of the transform is dynamic after you
initially create it:
pParentMatrixTransform->setDataVariance(osg::Object::DYNAMIC);

Tim

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