How do I create/update uniform struct?

[Wyatt Earp]

I want to use a struct in my glsl shader.

osg::StateSet::getOrCreateUniform allows for the specification of
Uniform::Type, but I don't see an enumeration for struct. How would I
create/set the uniform struct?

WE

[Wyatt Earp]

I want to use a struct in my glsl shader.

osg::StateSet:: getOrCreateUniform allows for the specification of
Uniform::Type, but I don't see an enumeration for struct. How would I
create/set the uniform struct?

WE

[Wyatt Earp]

I want to use a struct in my glsl shader.

osg::StateSet::getOrCreateUniform allows for the specification of
Uniform::Type, but I don't see an enumeration for struct. How would I
create/set the uniform struct?

WE

[Wyatt B. S. Earp]

Sorry for the multiple posts.
Wyatt

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=17029#17029

[Robert Osfield]

Hi Wyatt,

I don't know where to start as I don't understand your point of
confusion. The best thing you can do is go look at the
include/osg/Unform header, and the examples that use uniforms, just do
a search through the OSG sources for osg::Uniform to see how it's
used.

Robert.

Post by Wyatt Earp
I want to use a struct in my glsl shader.
osg::StateSet::getOrCreateUniform allows for the specification of
Uniform::Type, but I don't see an enumeration for struct.  How would I
create/set the uniform struct?
WE
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[Ralph Kern]

Wyatt Earp schrieb:
How would I

Post by Wyatt Earp
create/set the uniform struct?

You don't create/set the whole struct at once, but the individual
members of the struct. OpenGL recognizes struct members by the typical
dot notation "<name of struct>.<name of member>".

regards Ralph

[Wyatt Earp]

This is what I was getting at...

So if I have a struct in my app

struct MyStruct
{
float fMember;
int iMember;
} _myStruct;

And in my shader

struct MyStruct
{
float fMember;
int iMember;
} myStruct;


Then in my osg code I would do this...

stateset->getOrCreateUniform("myStruct.fMember",osg::Uniform::FLOAT)->set(myStruct.fMember);
stateset->getOrCreateUniform("myStruct.iMember",osg::Uniform::INT)->set(_myStruct.iMember);

And then to access the updated data, just use the struct as usual?

something = somethinelse * myStruct.fMember;

Wyatt

Post by Wyatt Earp
How would I

Post by Wyatt Earp
create/set the uniform struct?

You don't create/set the whole struct at once, but the individual
members of the struct. OpenGL recognizes struct members by the typical
dot notation "<name of struct>.<name of member>".
regards Ralph
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