[osg-users] hello,I have a problem.
Hi, I want to write a class from osg::Drawable::UpdateCallback to update a
Geometry call named geom,but there is no update happen.I dot't know what's
wrong.Does someone knows?Thanks in advance!NiuHeming
class niuhm : public osg::Drawable::UpdateCallback{public:
niuhm(const osg::Vec3& v11,const osg::Vec3& v22,const osg::Vec3& v33)
{v1=v11;v2=v22; v2=v33;
bs.radius()*=1.5f;
bs=osg::BoundingSphere(osg::Vec3(0.0f,0.0f,0.0f),4.0f);
bb.expandBy(bs);}virtual void update(osg::NodeVisitor* nv,
osg::Drawable* node){osg::Geometry* geom =
dynamic_cast(node);const osg::FrameStamp*
frameStamp = nv->getFrameStamp();if (geom && frameStamp)
{
osg::PositionAttitudeTransform* mt = new
osg::PositionAttitudeTransform(); { // set
up the animation path osg::AnimationPath* animationPath =
new osg::AnimationPath;
animationPath->insert(0.0,osg::AnimationPath::ControlPoint(bb.corner(0)));
animationPath->insert(1.0,osg::AnimationPath::ControlPoint(bb.corner(1)));
animationPath->insert(2.0,osg::AnimationPath::ControlPoint(bb.corner(2)));
animationPath->insert(3.0,osg::AnimationPath::ControlPoint(bb.corner(3)));
animationPath->insert(4.0,osg::AnimationPath::ControlPoint(bb.corner(0)));
animationPath->setLoopMode(osg::AnimationPath::SWING);
mt->setUpdateCallback(new
osg::AnimationPathCallback(animationPath)); }
// create marker for point light.
osg::Vec3 vertices = mt->getPosition();
unsigned int noXSteps = 100;
unsigned int noYSteps = 100; osg::Vec3Array* coords =
new osg::Vec3Array; coords->reserve(noXSteps*noYSteps);
osg::Vec3 dx = (v2-v1)/((float)noXSteps-1.0f);
osg::Vec3 dy = (v3-v1)/((float)noYSteps-1.0f);
unsigned int rowvertices;
unsigned int colvertices;rowvertices=(unsigned
int)((vertices._v[0])/(dx._v[0]));
colvertices=(unsigned int)((vertices._v[1])/(dy._v[1]));
unsigned int row; osg::Vec3 vRowStart = v1;
for(row=0;rowpush_back(v+osg::Vec3(0.0f,0.0f,-1.0f));
else coords->push_back(v);
v += dx; }
vRowStart+=dy;}
geom->setVertexArray(coords); } }
osg::Vec3 v1; osg::Vec3 v2; osg::Vec3 v3;
osg::BoundingSphere bs;osg::BoundingBox bb;
};
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Re: [osg-users] hello,I have a problem.
Hello. Niu:
You need to set the " class niuhm : public
osg::Drawable::UpdateCallback" object to your node to update; by:
geom->setDataVariance( ); geom->setUpdateCallback( );
You can refer to the osgcallback in the osgExamples.
xiaodong
2008/3/19 Niuheming <[EMAIL PROTECTED]>:
>
> Hi,
>I want to write a class from osg::Drawable::UpdateCallback to update a
> Geometry call named geom,but there is no update happen.I dot't know what's
> wrong.Does someone knows?
> Thanks in advance!
> NiuHeming
>
> class niuhm : public osg::Drawable::UpdateCallback
> {
> public:
> niuhm(const osg::Vec3& v11,const osg::Vec3& v22,const osg::Vec3&
> v33)
> {
> v1=v11;
> v2=v22;
>v2=v33;
>
>bs.radius()*=1.5f;
> bs=osg::BoundingSphere(osg::Vec3(0.0f,0.0f,0.0f),4.0f);
> bb.expandBy(bs);
> }
>
> ;virtual void update(osg::NodeVisitor* nv, osg::Drawable*
> node)
> {
> osg::Geometry* geom = dynamic_cast(node);
> const osg::FrameStamp* frameStamp = nv->getFrameStamp();
> if (geom && frameStamp)
> {
> osg::PositionAttitudeTransform* mt = new
> osg::PositionAttitudeTransform();
> {
> // set up the animation path
> osg::AnimationPath* animationPath = new
> osg::AnimationPath;
> animationPath->insert(0.0
> ,osg::AnimationPath::ControlPoint(bb.corner(0)));
> animationPath->inse rt(1.0
> ,osg::AnimationPath::ControlPoint(bb.corner(1)));
>animationPath->insert(2.0
> ,osg::AnimationPath::ControlPoint(bb.corner(2)));
>animationPath->insert(3.0
> ,osg::AnimationPath::ControlPoint(bb.corner(3)));
> animationPath->insert(4.0
> ,osg::AnimationPath::ControlPoint(bb.corner(0)));
>
> animationPath->setLoopMode(osg::AnimationPath::SWING);
> &nbs p; mt->setUpdateCallback(new
> osg::AnimationPathCallback(animationPath));
> }
>
> // create marker for point light.
> osg::Vec3 vertices = mt->getPosition();
>
> unsigned int noXSteps = 100;
> unsigned int noYSteps = 100;
>
> osg::Vec3Array* coords = new osg::Vec3Array;
> coords->reserve(noXSteps*noYSteps);
>
>
> osg::Vec3 dx = (v2-v1)/((float)noXSteps-1.0f);
> &nbs p;osg::Vec3 dy = (v3-v1)/((float)noYSteps-1.0f);
> unsigned int rowvertices;
>unsigned int colvertices;
> rowvertices=(unsigned
> int)((vertices._v[0])/(dx._v[0]));
> colvertices=(unsigned
> int)((vertices._v[1])/(dy._v[1]));
>
> unsigned int row;
>& nbsp; osg::Vec3 vRowStart = v1;
> for(row=0;row osg::Vec3 v = vRowStart;
> for(unsigned int col=0;colif ((row==rowvertices)&&(col==colvertices))
> coords->push_back(v+osg::Vec3(0.0f,0.0f
> ,-1.0f));
> else
> coords->push_back(v);
> v += dx;
> }
>vRowStart+=dy;
> }
>
> geom->setVertexArray(coords);
> }
>
> }
>osg::Vec3 v1;
>osg::Vec3 v2;
>osg::Vec3 v3;
> osg::BoundingSphere bs;
> osg::BoundingBox bb;
> };
>
> --
> "七件武器，七种完美" 立刻体验！
>
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Re: [osg-users] hello,I have a problem.
Hi NiuHeming,
Most likely problem is that your geometry has display lists enabled
and it hasn't been told that its now out of date so isn't updated.
If you are dynamically updating a geometry then its best to turn of
display lists via geometry->setUseDisplayLists(false); Or if you
update very occassionally then on after each batch of changes you need
a geometry->dirtyDisplayList();
Robert.
2008/3/19 Niuheming <[EMAIL PROTECTED]>:
>
>
> Hi,
>I want to write a class from osg::Drawable::UpdateCallback to update a
> Geometry call named geom,but there is no update happen.I dot't know what's
> wrong.Does someone knows?
> Thanks in advance!
> NiuHeming
>
> class niuhm : public osg::Drawable::UpdateCallback
> {
> public:
> niuhm(const osg::Vec3& v11,const osg::Vec3& v22,const osg::Vec3&
> v33)
> {
> v1=v11;
> v2=v22;
>v2=v33;
>
>bs.radius()*=1.5f;
> bs=osg::BoundingSphere(osg::Vec3(0.0f,0.0f,0.0f),4.0f);
> bb.expandBy(bs);
> }
>
> ;virtual void update(osg::NodeVisitor* nv, osg::Drawable* node)
> {
> osg::Geometry* geom = dynamic_cast(node);
> const osg::FrameStamp* frameStamp = nv->getFrameStamp();
> if (geom && frameStamp)
> {
>osg::PositionAttitudeTransform* mt = new
> osg::PositionAttitudeTransform();
> {
> // set up the animation path
> osg::AnimationPath* animationPath = new
> osg::AnimationPath;
>
> animationPath->insert(0.0,osg::AnimationPath::ControlPoint(bb.corner(0)));
> animationPath->inse
> rt(1.0,osg::AnimationPath::ControlPoint(bb.corner(1)));
>
> animationPath->insert(2.0,osg::AnimationPath::ControlPoint(bb.corner(2)));
>
> animationPath->insert(3.0,osg::AnimationPath::ControlPoint(bb.corner(3)));
>
> animationPath->insert(4.0,osg::AnimationPath::ControlPoint(bb.corner(0)));
>
> animationPath->setLoopMode(osg::AnimationPath::SWING);
> &nbs p; mt->setUpdateCallback(new
> osg::AnimationPathCallback(animationPath));
> }
>
> // create marker for point light.
> osg::Vec3 vertices = mt->getPosition();
>
>unsigned int noXSteps = 100;
> unsigned int noYSteps = 100;
>
> osg::Vec3Array* coords = new osg::Vec3Array;
> coords->reserve(noXSteps*noYSteps);
>
>
> osg::Vec3 dx = (v2-v1)/((float)noXSteps-1.0f);
> &nbs p;osg::Vec3 dy = (v3-v1)/((float)noYSteps-1.0f);
> unsigned int rowvertices;
>unsigned int colvertices;
> rowvertices=(unsigned
> int)((vertices._v[0])/(dx._v[0]));
> colvertices=(unsigned
> int)((vertices._v[1])/(dy._v[1]));
>
> unsigned int row;
>& nbsp; osg::Vec3 vRowStart = v1;
> for(row=0;row osg::Vec3 v = vRowStart;
> for(unsigned int col=0;colif ((row==rowvertices)&&(col==colvertices))
>
> coords->push_back(v+osg::Vec3(0.0f,0.0f,-1.0f));
> else
> coords->push_back(v);
> v += dx;
> }
>vRowStart+=dy;
> }
>
> geom->setVertexArray(coords);
> }
>
> }
>osg::Vec3 v1;
>osg::Vec3 v2;
>osg::Vec3 v3;
> osg::BoundingSphere bs;
> osg::BoundingBox bb;
> };
>
>
> "七件武器，七种完美" 立刻体验！
> ___
> osg-users mailing list
> osg-users@lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
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