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Implement BillboardNode

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This commit is contained in:
scrawl 2015-03-20 23:14:01 +01:00
parent d486cde330
commit 32bb202290
1 changed files with 36 additions and 3 deletions
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39
components/nifosg/nifloader.cpp
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@ -128,6 +128,7 @@ namespace
} }
// NodeCallback used to update the bone matrices in skeleton space as needed for skinning. // NodeCallback used to update the bone matrices in skeleton space as needed for skinning.
// Must be set on a Bone.
class UpdateBone : public osg::NodeCallback class UpdateBone : public osg::NodeCallback
{ {
public: public:
@ -161,10 +162,39 @@ namespace
} }
}; };
// Custom node used to have a transform always oriented towards the camera. Can have translation and scale
// set just like a regular MatrixTransform, but the rotation set will be overridden in order to face the camera.
class BillboardNode : public osg::MatrixTransform
{
public:
BillboardNode() : osg::MatrixTransform() {}
BillboardNode(const BillboardNode& copy, const osg::CopyOp& copyop)
: osg::MatrixTransform(copy, copyop) {}
BillboardNode(const osg::Matrix& matrix)
: osg::MatrixTransform(matrix) {}
META_Node(NifOsg, BillboardNode)
virtual bool computeLocalToWorldMatrix(osg::Matrix& matrix, osg::NodeVisitor*) const
{
if (_referenceFrame==RELATIVE_RF)
{
matrix.preMult(_matrix);
matrix.setRotate(osg::Quat());
}
else // absolute
{
matrix = _matrix;
}
return true;
}
};
// NodeCallback used to set the inverse of the parent bone's matrix in skeleton space // NodeCallback used to set the inverse of the parent bone's matrix in skeleton space
// on the MatrixTransform that the NodeCallback is attached to. This is used so we can // on the MatrixTransform that the NodeCallback is attached to. This is used so we can
// attach skinned meshes to their actual parent node, while still having the skinning // attach skinned meshes to their actual parent node, while still having the skinning
// work in skeleton space as expected. // work in skeleton space as expected.
// Must be set on a MatrixTransform.
class InvertBoneMatrix : public osg::NodeCallback class InvertBoneMatrix : public osg::NodeCallback
{ {
public: public:
@ -298,7 +328,11 @@ namespace NifOsg
std::map<int, int> boundTextures, int animflags, int particleflags, bool collisionNode) std::map<int, int> boundTextures, int animflags, int particleflags, bool collisionNode)
{ {
osg::ref_ptr<osg::MatrixTransform> transformNode; osg::ref_ptr<osg::MatrixTransform> transformNode;
if (createSkeleton) if (nifNode->recType == Nif::RC_NiBillboardNode)
{
transformNode = new BillboardNode(toMatrix(nifNode->trafo));
}
else if (createSkeleton)
{ {
osgAnimation::Bone* bone = new osgAnimation::Bone; osgAnimation::Bone* bone = new osgAnimation::Bone;
transformNode = bone; transformNode = bone;
@ -308,8 +342,7 @@ namespace NifOsg
} }
else else
{ {
transformNode = new osg::MatrixTransform; transformNode = new osg::MatrixTransform(toMatrix(nifNode->trafo));
transformNode->setMatrix(toMatrix(nifNode->trafo));
} }
if (nifNode->recType == Nif::RC_NiBSAnimationNode) if (nifNode->recType == Nif::RC_NiBSAnimationNode)