Re: [osg-users] issue about getting the material properties from the current state in rendering info

2015-06-23 Thread Gianluca Natale 
Thanks Sebastian,
I'm simply trying to get the alpha value of the diffuse component of the 
material properties, because I have to pass it to an underlying
graphic library that I use for rendering that custom drawable.

BTW, I further investigated.
In the following function:

State::captureCurrentState(StateSet stateset)

The _attributeMap actually contains as MATERIAL attribute exactly the pointer 
to the osg::Material property that I created.
But in the attribute stack it appears as the 'last_applied_attribute', and 
'changed' is set to true.
For all other attributes the pointers stored in 'last_applied_attribute' are 
correct as well, but 'changed' is set to false.
Also, in that AttributeStack the member attributeVec contains just one element, 
that is not the correct one (it points to a different osg::Material).
While for all the other attributes, which have 'changed' set to false, 
last_applied_attribute coincides with the first element in attributeVec.

I don't know anything of that code, but I don't understand why osg::Material 
appears to be changed while other attributes not.
Or should I use a different API to get the current osg::Material?

Thanks,
Gianluca Natale


From: osg-users [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf 
Of Sebastian Messerschmidt
Sent: martedì 23 giugno 2015 18:15
To: OpenSceneGraph Users; Osg Users
Subject: Re: [osg-users] issue about getting the material properties from the 
current state in rendering info


Am 23.06.2015 18:05, schrieb Gianluca Natale:
Hi all,
I'm using OSG 3.0.1.
I have an issue when I try to retrieve the material properties from the 
rendering info, in my custom drawable.

To be clearer:
I have a custom drawable, for which I implemented a

myDrawable::drawImplementation(osg::RenderInfo osgRenderInfo).

When I try to get the material properties inside that function, by following 
code:

osg::StateSet  drwbStateSet;
osg::State *state = osgRenderInfo.getState();
state-captureCurrentState(drwbStateSet);

the returned material properties is invalid.
Specifically, I put a breakpoint in following function:

StateSet::setAttribute(StateAttribute *attribute, StateAttribute::OverrideValue 
value)

that is called inside captureCurrentState.
When the attribute is an osg::Material, the _ptr is different from the one 
allocated when the material has been set, in the state set associated to a 
parent node of that drawable.
Furthermore, _userDataContainer is 0x, so no valid 
osg::Material is returned in the captured state set.
User data defaults to nullptr. So if you're not setting it up that is expected.
As you don't explain why you are trying to inspect state during draw it is hard 
to guess what you are after.
I simply guess that your state is set up somewhere further up in the stategraph 
(i.e. in one of the parents) and that state is set up lazy.
Maybe Robert can give some insights here.




Any idea of the possible cause of the issue? Where did I go wrong?
BTW, all other attributes (polygon offset, polygon mode, etc...) are returned 
correctly.
Are you sure you are setting up an osg::Material state attribute somewhere?


Thanks,
Gianluca Natale






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[osg-users] issue about getting the material properties from the current state in rendering info

2015-06-23 Thread Gianluca Natale 
Hi all,
I'm using OSG 3.0.1.
I have an issue when I try to retrieve the material properties from the 
rendering info, in my custom drawable.

To be clearer:
I have a custom drawable, for which I implemented a

myDrawable::drawImplementation(osg::RenderInfo osgRenderInfo).

When I try to get the material properties inside that function, by following 
code:

osg::StateSet  drwbStateSet;
osg::State *state = osgRenderInfo.getState();
state-captureCurrentState(drwbStateSet);

the returned material properties is invalid.
Specifically, I put a breakpoint in following function:

StateSet::setAttribute(StateAttribute *attribute, StateAttribute::OverrideValue 
value)

that is called inside captureCurrentState.
When the attribute is an osg::Material, the _ptr is different from the one 
allocated when the material has been set, in the state set associated to a 
parent node of that drawable.
Furthermore, _userDataContainer is 0x, so no valid 
osg::Material is returned in the captured state set.

Any idea of the possible cause of the issue? Where did I go wrong?
BTW, all other attributes (polygon offset, polygon mode, etc...) are returned 
correctly.

Thanks,
Gianluca Natale


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Re: [osg-users] issue about getting the material properties from the current state in rendering info

2015-06-23 Thread Trajce Nikolov NICK 
Hi,

I think you can get the current material like this : (didn't compiled but
maybe as a hint)

osg::State* state = renderInfo.getState();
osg::State::AttributeMap attrMap = state-getAttributeMap();
osg::StateAttribute::TypeMemberPair typeMember =
std::make_pairosg::StateAttribute::Type,int(osg::StateAttribute::MATERIAL,0);
osg::State::AttributeStack stack = attrMap[typeMember];
osg::State::AttributeVec attributes = stack.attributeVec;

you iterate over attributes and dynamic_cast osg::StateAttribute to
osg::Material



On Tue, Jun 23, 2015 at 6:15 PM, Sebastian Messerschmidt 
sebastian.messerschm...@gmx.de wrote:


 Am 23.06.2015 18:05, schrieb Gianluca Natale:

  Hi all,

 I’m using OSG 3.0.1.

 I have an issue when I try to retrieve the material properties from the
 rendering info, in my custom drawable.



 To be clearer:

 I have a custom drawable, for which I implemented a



 myDrawable::drawImplementation(osg::RenderInfo osgRenderInfo).



 When I try to get the material properties inside that function, by
 following code:



 osg::StateSet  drwbStateSet;

 osg::State *state = osgRenderInfo.getState();

 state-captureCurrentState(drwbStateSet);



 the returned material properties is invalid.

 Specifically, I put a breakpoint in following function:



 StateSet::setAttribute(StateAttribute *attribute,
 StateAttribute::OverrideValue value)



 that is called inside captureCurrentState.

 When the attribute is an osg::Material, the _ptr is different from the one
 allocated when the material has been set, in the state set associated to a
 parent node of that drawable.

 Furthermore, _userDataContainer is 0x, so no valid
 osg::Material is returned in the captured state set.

 User data defaults to nullptr. So if you're not setting it up that is
 expected.
 As you don't explain why you are trying to inspect state during draw it is
 hard to guess what you are after.
 I simply guess that your state is set up somewhere further up in the
 stategraph (i.e. in one of the parents) and that state is set up lazy.
 Maybe Robert can give some insights here.




 Any idea of the possible cause of the issue? Where did I go wrong?

 BTW, all other attributes (polygon offset, polygon mode, etc…) are
 returned correctly.

 Are you sure you are setting up an osg::Material state attribute somewhere?



 Thanks,

 Gianluca Natale






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Re: [osg-users] issue about getting the material properties from the current state in rendering info

2015-06-23 Thread Farshid Lashkari 
Hi Gianluca,

Have you tried using getLastAppliedAttribute on the osg::State object?

const osg::Material* mat = dynamic_castconst
osg::Material*(state.getLastAppliedAttribute(osg::StateAttribute::MATERIAL));
if(mat)
{
// do something with material
}

I've used this method to access attributes from the current state and it
has worked for me.

Cheers,
Farshid

On Tue, Jun 23, 2015 at 9:49 AM, Gianluca Natale nat...@europe.altair.com
wrote:

  Thanks Sebastian,

 I’m simply trying to get the alpha value of the diffuse component of the
 material properties, because I have to pass it to an underlying

 graphic library that I use for rendering that custom drawable.



 BTW, I further investigated.

 In the following function:



 State::captureCurrentState(StateSet stateset)



 The _attributeMap actually contains as MATERIAL attribute exactly the
 pointer to the osg::Material property that I created.

 But in the attribute stack it appears as the ‘last_applied_attribute’, and
 ‘changed’ is set to true.

 For all other attributes the pointers stored in ‘last_applied_attribute’
 are correct as well, but ‘changed’ is set to false.

 Also, in that AttributeStack the member attributeVec contains just one
 element, that is not the correct one (it points to a different
 osg::Material).

 While for all the other attributes, which have ‘changed’ set to false,
 last_applied_attribute coincides with the first element in attributeVec.



 I don’t know anything of that code, but I don’t understand why
 osg::Material appears to be changed while other attributes not.

 Or should I use a different API to get the current osg::Material?



 Thanks,

 Gianluca Natale





 *From:* osg-users [mailto:osg-users-boun...@lists.openscenegraph.org] *On
 Behalf Of *Sebastian Messerschmidt
 *Sent:* martedì 23 giugno 2015 18:15
 *To:* OpenSceneGraph Users; Osg Users
 *Subject:* Re: [osg-users] issue about getting the material properties
 from the current state in rendering info





 Am 23.06.2015 18:05, schrieb Gianluca Natale:

 Hi all,

 I’m using OSG 3.0.1.

 I have an issue when I try to retrieve the material properties from the
 rendering info, in my custom drawable.



 To be clearer:

 I have a custom drawable, for which I implemented a



 myDrawable::drawImplementation(osg::RenderInfo osgRenderInfo).



 When I try to get the material properties inside that function, by
 following code:



 osg::StateSet  drwbStateSet;

 osg::State *state = osgRenderInfo.getState();

 state-captureCurrentState(drwbStateSet);



 the returned material properties is invalid.

 Specifically, I put a breakpoint in following function:



 StateSet::setAttribute(StateAttribute *attribute,
 StateAttribute::OverrideValue value)



 that is called inside captureCurrentState.

 When the attribute is an osg::Material, the _ptr is different from the one
 allocated when the material has been set, in the state set associated to a
 parent node of that drawable.

 Furthermore, _userDataContainer is 0x, so no valid
 osg::Material is returned in the captured state set.

 User data defaults to nullptr. So if you're not setting it up that is
 expected.
 As you don't explain why you are trying to inspect state during draw it is
 hard to guess what you are after.
 I simply guess that your state is set up somewhere further up in the
 stategraph (i.e. in one of the parents) and that state is set up lazy.
 Maybe Robert can give some insights here.





 Any idea of the possible cause of the issue? Where did I go wrong?

 BTW, all other attributes (polygon offset, polygon mode, etc…) are
 returned correctly.

 Are you sure you are setting up an osg::Material state attribute somewhere?



 Thanks,

 Gianluca Natale








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Re: [osg-users] issue about getting the material properties from the current state in rendering info

2015-06-23 Thread Sebastian Messerschmidt 


Am 23.06.2015 18:05, schrieb Gianluca Natale:


Hi all,

I'm using OSG 3.0.1.

I have an issue when I try to retrieve the material properties from 
the rendering info, in my custom drawable.


To be clearer:

I have a custom drawable, for which I implemented a

myDrawable::drawImplementation(osg::RenderInfo osgRenderInfo).

When I try to get the material properties inside that function, by 
following code:


osg::StateSet  drwbStateSet;

osg::State *state = osgRenderInfo.getState();

state-captureCurrentState(drwbStateSet);

the returned material properties is invalid.

Specifically, I put a breakpoint in following function:

StateSet::setAttribute(StateAttribute *attribute, 
StateAttribute::OverrideValue value)


that is called inside captureCurrentState.

When the attribute is an osg::Material, the _ptr is different from the 
one allocated when the material has been set, in the state set 
associated to a parent node of that drawable.


Furthermore, _userDataContainer is 0x, so no valid 
osg::Material is returned in the captured state set.


User data defaults to nullptr. So if you're not setting it up that is 
expected.
As you don't explain why you are trying to inspect state during draw it 
is hard to guess what you are after.
I simply guess that your state is set up somewhere further up in the 
stategraph (i.e. in one of the parents) and that state is set up lazy.

Maybe Robert can give some insights here.



Any idea of the possible cause of the issue? Where did I go wrong?

BTW, all other attributes (polygon offset, polygon mode, etc...) are 
returned correctly.



Are you sure you are setting up an osg::Material state attribute somewhere?


Thanks,

Gianluca Natale



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Re: [osg-users] issue about getting the material properties from the current state in rendering info

2015-06-23 Thread Jannik Heller 
Hi Gianluca,


 The _attributeMap actually contains as MATERIAL attribute exactly the pointer 
 to the osg::Material property that I created. 
 But in the attribute stack it appears as the ‘last_applied_attribute’, and 
 ‘changed’ is set to true. 
 For all other attributes the pointers stored in ‘last_applied_attribute’ are 
 correct as well, but ‘changed’ is set to false. 


try calling osg::State::apply() to apply changed state that hasn't been applied 
yet.

Cheers,
Jannik

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