Re: [osg-users] Transparency on a drawable
Thanks a lot !
I did some changes to have the same osg file, and it work very good now !!!
It seems to be a mix of different settings.
thanks for your help.
Regards,
Vincent.
2008/7/15 dimi christop <[EMAIL PROTECTED]>:
> Ok,
> I fixed your osg file so that it displays varrying tranparency (top
> transparent, bottom opaque).
> I assume this is what you wanted.
> Do an diff on the files and see what you did wrong You set the colors
> per primitive and not per vertex.
>
>
>
> - Original Message
> From: Vincent Bourdier <[EMAIL PROTECTED]>
> To: OpenSceneGraph Users
> Sent: Tuesday, July 15, 2008 1:19:23 PM
> Subject: Re: [osg-users] Transparency on a drawable
>
> Hi Dimi,
>
> this is my code :
>
> osg::StateSet* state = g->getOrCreateStateSet();
>
> state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
> osg::Material* mat = new osg::Material;
> mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
> mat->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
> state->setAttributeAndModes(mat,osg::StateAttribute::ON |
> osg::StateAttribute::OVERRIDE);
>
> osg::BlendFunc* bf = new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
> osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
> state->setAttributeAndModes(bf);
>
> state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
> state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
>
> g->setStateSet(state);
>
> there is no difference at all...
>
> thanks for help.
>
> Vincent.
>
>
> 2008/7/15 dimi christop <[EMAIL PROTECTED]>:
>
>> This is because when you set alpha to the vertices and attach also an
>> material
>> and a blending function you have to setColorMode (AMBIENT_DIFFUSE) on the
>> material.
>>
>> Dimi
>>
>> - Original Message
>> From: Vincent Bourdier <[EMAIL PROTECTED]>
>> To: OpenSceneGraph Users
>> Sent: Tuesday, July 15, 2008 11:09:23 AM
>> Subject: Re: [osg-users] Transparency on a drawable
>>
>>
>> Hi Paul.
>>
>> Nothing changes with color's alpha changed...
>>
>>
>> 2008/7/15 Paul Speed <[EMAIL PROTECTED]>:
>>
>>>
>>>
>>> Vincent Bourdier wrote:
>>>
>>>> Hi
>>>>
>>>> Yes, no solutions seems to work on my problem.
>>>> Because all the propositions concern nodes, I permit to remember that I
>>>> am looking at a way to set alpha level on a osg::Geometry ...
>>>>
>>>> On node I already have a method using material : set alpha channel, and
>>>> it works good... But on my geometry nothing look to work good...
>>>>
>>>> This is all my geometry creator code :
>>>>
>>>>osg::ref_ptr builtGeometry(){
>>>>
>>>>double alpha = 0.1;
>>>>osg::Vec4 grey(0.4,0.4,0.4,1.0);
>>>>osg::Vec4 yellow(1.0,1.0,0.0,1.0);
>>>>
>>>
>>> What happens if you put alpha for the fourth value in your color?
>>> -Paul
>>>
>>>
>>>>osg::Geometry* g = new osg::Geometry;
>>>>osg::Vec3Array* vertices= new osg::Vec3Array();
>>>>osg::Vec3Array* normals= new osg::Vec3Array();
>>>>osg::Vec4Array* colors= new osg::Vec4Array();
>>>>
>>>>normals->push_back(osg::Vec3(0,0,1));
>>>>colors->push_back(grey);
>>>>
>>>>//
>>>>//QUAD
>>>>vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
>>>>_offset));
>>>>vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
>>>>_offset));
>>>>vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
>>>>_offset));
>>>>vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
>>>>_offset));
>>>>
>>>>if(!_empty)
>>>>g->addPrimitiveSet(new
>>>>osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
>>>>else
>>>>g->addPrimitiveSet(new
>>>>osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,0,4));
>>>>
>>>>
>>>>//-
>>>>//LINE
>>>>
>>>>vertices->push_back(osg::Vec3(0.0, 1.0, _offset));
>>>>vertices->push_back(osg::Vec3(0.0, _dist, _offset)
Re: [osg-users] Transparency on a drawable
Ok,
I fixed your osg file so that it displays varrying tranparency (top
transparent, bottom opaque).
I assume this is what you wanted.
Do an diff on the files and see what you did wrong You set the colors per
primitive and not per vertex.
- Original Message
From: Vincent Bourdier <[EMAIL PROTECTED]>
To: OpenSceneGraph Users
Sent: Tuesday, July 15, 2008 1:19:23 PM
Subject: Re: [osg-users] Transparency on a drawable
Hi Dimi,
this is my code :
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
mat->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
state->setAttributeAndModes(mat,osg::StateAttribute::ON |
osg::StateAttribute::OVERRIDE);
osg::BlendFunc* bf = new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
state->setAttributeAndModes(bf);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
g->setStateSet(state);
there is no difference at all...
thanks for help.
Vincent.
2008/7/15 dimi christop <[EMAIL PROTECTED]>:
This is because when you set alpha to the vertices and attach also an material
and a blending function you have to setColorMode (AMBIENT_DIFFUSE) on the
material.
Dimi
- Original Message
From: Vincent Bourdier <[EMAIL PROTECTED]>
To: OpenSceneGraph Users
Sent: Tuesday, July 15, 2008 11:09:23 AM
Subject: Re: [osg-users] Transparency on a drawable
Hi Paul.
Nothing changes with color's alpha changed...
2008/7/15 Paul Speed <[EMAIL PROTECTED]>:
Vincent Bourdier wrote:
Hi
Yes, no solutions seems to work on my problem.
Because all the propositions concern nodes, I permit to remember that I am
looking at a way to set alpha level on a osg::Geometry ...
On node I already have a method using material : set alpha channel, and it
works good... But on my geometry nothing look to work good...
This is all my geometry creator code :
osg::ref_ptr builtGeometry(){
double alpha = 0.1;
osg::Vec4 grey(0.4,0.4,0.4,1.0);
osg::Vec4 yellow(1.0,1.0,0.0,1.0);
What happens if you put alpha for the fourth value in your color?
-Paul
osg::Geometry* g = new osg::Geometry;
osg::Vec3Array* vertices= new osg::Vec3Array();
osg::Vec3Array* normals= new osg::Vec3Array();
osg::Vec4Array* colors= new osg::Vec4Array();
normals->push_back(osg::Vec3(0,0,1));
colors->push_back(grey);
//
//QUAD
vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
_offset));
vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
_offset));
vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
_offset));
vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
_offset));
if(!_empty)
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
else
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,0,4));
//-
//LINE
vertices->push_back(osg::Vec3(0.0, 1.0, _offset));
vertices->push_back(osg::Vec3(0.0, _dist, _offset));
colors->push_back(grey);
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::LINES,4,2));
//
//LINE_LOOP
vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
_offset/2.0));
vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
_offset/2.0));
vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
_offset/2.0));
vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
_offset/2.0));
colors->push_back(yellow);
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,6,4));
g->setNormalArray(normals);
g->setVertexArray(vertices);
g->setColorArray(colors);
g->setNormalBinding(osg::Geometry::BIND_OVERALL);
g->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
g->setDataVariance(osg::Object::DYNAMIC);
//TRANSPARENCY
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
state->setAttributeAndModes(mat,osg::StateAttribute::ON |
osg::StateAttribute::OVERRIDE);
osg::BlendFunc* bf = new
osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
state->setAttributeAndModes(bf);
state->setRenderingHint(osg::StateSe
Re: [osg-users] Transparency on a drawable
Hi Dimi,
this is my code :
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
mat->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
state->setAttributeAndModes(mat,osg::StateAttribute::ON |
osg::StateAttribute::OVERRIDE);
osg::BlendFunc* bf = new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
state->setAttributeAndModes(bf);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
g->setStateSet(state);
there is no difference at all...
thanks for help.
Vincent.
2008/7/15 dimi christop <[EMAIL PROTECTED]>:
> This is because when you set alpha to the vertices and attach also an
> material
> and a blending function you have to setColorMode (AMBIENT_DIFFUSE) on the
> material.
>
> Dimi
>
> - Original Message
> From: Vincent Bourdier <[EMAIL PROTECTED]>
> To: OpenSceneGraph Users
> Sent: Tuesday, July 15, 2008 11:09:23 AM
> Subject: Re: [osg-users] Transparency on a drawable
>
>
> Hi Paul.
>
> Nothing changes with color's alpha changed...
>
>
> 2008/7/15 Paul Speed <[EMAIL PROTECTED]>:
>
>>
>>
>> Vincent Bourdier wrote:
>>
>>> Hi
>>>
>>> Yes, no solutions seems to work on my problem.
>>> Because all the propositions concern nodes, I permit to remember that I
>>> am looking at a way to set alpha level on a osg::Geometry ...
>>>
>>> On node I already have a method using material : set alpha channel, and
>>> it works good... But on my geometry nothing look to work good...
>>>
>>> This is all my geometry creator code :
>>>
>>>osg::ref_ptr builtGeometry(){
>>>
>>>double alpha = 0.1;
>>>osg::Vec4 grey(0.4,0.4,0.4,1.0);
>>>osg::Vec4 yellow(1.0,1.0,0.0,1.0);
>>>
>>
>> What happens if you put alpha for the fourth value in your color?
>> -Paul
>>
>>
>>>osg::Geometry* g = new osg::Geometry;
>>>osg::Vec3Array* vertices= new osg::Vec3Array();
>>>osg::Vec3Array* normals= new osg::Vec3Array();
>>>osg::Vec4Array* colors= new osg::Vec4Array();
>>>
>>>normals->push_back(osg::Vec3(0,0,1));
>>>colors->push_back(grey);
>>>
>>>//
>>>//QUAD
>>>vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
>>>_offset));
>>>vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
>>>_offset));
>>>vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
>>>_offset));
>>>vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
>>>_offset));
>>>
>>>if(!_empty)
>>>g->addPrimitiveSet(new
>>>osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
>>>else
>>>g->addPrimitiveSet(new
>>>osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,0,4));
>>>
>>>
>>>//-
>>>//LINE
>>>
>>>vertices->push_back(osg::Vec3(0.0, 1.0, _offset));
>>>vertices->push_back(osg::Vec3(0.0, _dist, _offset));
>>>colors->push_back(grey);
>>>g->addPrimitiveSet(new
>>>osg::DrawArrays(osg::PrimitiveSet::LINES,4,2));
>>>
>>>
>>>//
>>>//LINE_LOOP
>>>
>>>vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
>>>_offset/2.0));
>>>vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
>>>_offset/2.0));
>>>vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
>>>_offset/2.0));
>>>vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
>>>_offset/2.0));
>>>
>>>colors->push_back(yellow);
>>>g->addPrimitiveSet(new
>>>osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,6,4));
>>>
>>>g->setNormalArray(normals);
>>>g->setVertexArray(vertices);
>>>g->setColorArray(colors);
>>>
>>>g->setNormalBinding(osg::Geometry::BIND_OVERALL);
>>>g->setColorBinding(osg::Geometry::B
Re: [osg-users] Transparency on a drawable
This is because when you set alpha to the vertices and attach also an material
and a blending function you have to setColorMode (AMBIENT_DIFFUSE) on the
material.
Dimi
- Original Message
From: Vincent Bourdier <[EMAIL PROTECTED]>
To: OpenSceneGraph Users
Sent: Tuesday, July 15, 2008 11:09:23 AM
Subject: Re: [osg-users] Transparency on a drawable
Hi Paul.
Nothing changes with color's alpha changed...
2008/7/15 Paul Speed <[EMAIL PROTECTED]>:
Vincent Bourdier wrote:
Hi
Yes, no solutions seems to work on my problem.
Because all the propositions concern nodes, I permit to remember that I am
looking at a way to set alpha level on a osg::Geometry ...
On node I already have a method using material : set alpha channel, and it
works good... But on my geometry nothing look to work good...
This is all my geometry creator code :
osg::ref_ptr builtGeometry(){
double alpha = 0.1;
osg::Vec4 grey(0.4,0.4,0.4,1.0);
osg::Vec4 yellow(1.0,1.0,0.0,1.0);
What happens if you put alpha for the fourth value in your color?
-Paul
osg::Geometry* g = new osg::Geometry;
osg::Vec3Array* vertices= new osg::Vec3Array();
osg::Vec3Array* normals= new osg::Vec3Array();
osg::Vec4Array* colors= new osg::Vec4Array();
normals->push_back(osg::Vec3(0,0,1));
colors->push_back(grey);
//
//QUAD
vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
_offset));
vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
_offset));
vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
_offset));
vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
_offset));
if(!_empty)
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
else
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,0,4));
//-
//LINE
vertices->push_back(osg::Vec3(0.0, 1.0, _offset));
vertices->push_back(osg::Vec3(0.0, _dist, _offset));
colors->push_back(grey);
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::LINES,4,2));
//
//LINE_LOOP
vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
_offset/2.0));
vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
_offset/2.0));
vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
_offset/2.0));
vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
_offset/2.0));
colors->push_back(yellow);
g->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,6,4));
g->setNormalArray(normals);
g->setVertexArray(vertices);
g->setColorArray(colors);
g->setNormalBinding(osg::Geometry::BIND_OVERALL);
g->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
g->setDataVariance(osg::Object::DYNAMIC);
//TRANSPARENCY
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
state->setAttributeAndModes(mat,osg::StateAttribute::ON |
osg::StateAttribute::OVERRIDE);
osg::BlendFunc* bf = new
osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
state->setAttributeAndModes(bf);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
g->setStateSet(state);
return g;
}
Thanks for your help.
Regards,
Vincent.
2008/7/15 dimi christop <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>:
Hi Vincent,
I see you still havent found a solution. So here I send you a
complete example of transpareny.
Its a modification of the Viewer example from the Qucik start guide.
It loads up a cow and overrides the alpha to 0.1.
Hope you can start from there.
Dimi
// Viewer Example, A minimal OSG viewer
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
int
main( int, char ** )
{
// Create a Viewer.
osgViewer::Viewer viewer;
// Load a model and add it to the Viewer.
osg::ref_ptr nde = osgDB::readNodeFile( "cow.osg" );
// Create StateSet and Material
osg::StateSet* state2 = nde->getOrCreateStateSet();
osg::ref_ptr mat2 = new osg::Material;
// Set alpha to 0.1
mat2->setAlpha(osg::Material::FRONT_AND_BACK, 0.1);
state2-&
Re: [osg-users] Transparency on a drawable
Sure This is my Billboard node which won't set its geometry to transparent. thanks for help. Regards, Vincent 2008/7/15 Ulrich Hertlein <[EMAIL PROTECTED]>: > Hi Vincent, > > odd... could you save the scene and post it? > /ulrich > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > node_debug.osg Description: Binary data ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transparency on a drawable
Hi Vincent, odd... could you save the scene and post it? /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transparency on a drawable
G viewer
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>#include
>>int
>>main( int, char ** )
>>{
>>// Create a Viewer.
>>osgViewer::Viewer viewer;
>>// Load a model and add it to the Viewer.
>>osg::ref_ptr nde = osgDB::readNodeFile( "cow.osg" );
>>// Create StateSet and Material
>>osg::StateSet* state2 = nde->getOrCreateStateSet();
>> osg::ref_ptr mat2 = new osg::Material;
>> // Set alpha to 0.1
>>mat2->setAlpha(osg::Material::FRONT_AND_BACK, 0.1);
>>state2->setAttributeAndModes( mat2.get() ,
>>osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
>> // Turn on blending
>>osg::BlendFunc* bf = new
>>osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
>>osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
>>state2->setAttributeAndModes(bf);
>>viewer.setSceneData(nde.get());
>>if (!viewer.getSceneData())
>>{
>>osg::notify( osg::FATAL ) << "Unable to load data file.
>>Exiting." << std::endl;
>>return 1;
>>}
>>
>>// Display, and main loop.
>>return viewer.run();
>>}
>>
>>- Original Message
>>From: Vincent Bourdier <[EMAIL PROTECTED]
>><mailto:[EMAIL PROTECTED]>>
>>To: OpenSceneGraph Users ><mailto:osg-users@lists.openscenegraph.org>>
>>Sent: Tuesday, July 15, 2008 9:04:23 AM
>>Subject: Re: [osg-users] Transparency on a drawable
>>
>>Hi Ulrich
>>
>>thanks for help.
>>
>>I use/try this code for the moment :
>>
>>osg::StateSet* state = g->getOrCreateStateSet();
>>
>>
>> state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
>>osg::Material* mat =
>>(osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
>>if(!mat) {
>>mat = new osg::Material; }
>>mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
>>state->setAttributeAndModes(mat,osg::StateAttribute::ON);
>>state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
>>state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
>>
>>But nothing appear transparent...
>>
>>Regards,
>> Vincent
>>
>>2008/7/12 Ulrich Hertlein <[EMAIL PROTECTED]
>><mailto:[EMAIL PROTECTED]>>:
>>
>>Vincent Bourdier wrote:
>>
>>I do exactly the same things, on Nodes...
>>
>>stateset->setMode(GL_BLEND,
>> osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
>>
>>stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
>>
>>
>>Are you sure you're doing this last line? It's not in the code
>>snippet you posted initially...
>>
>>Cheers,
>>/ulrich
>>
>>
>> double opacity = 0.1;
>>
>> osg::StateSet* state = mygometry->getOrCreateStateSet();
>> state->setMode(GL_BLEND,osg::StateAttribute::ON|
>> osg::StateAttribute::OVERRIDE);
>> osg::Material* mat = (osg::Material*)state->getAttribute
>> (osg::StateAttribute::MATERIAL);
>> if(!mat) {
>> mat = new osg::Material;
>> mat->setAlpha(osg::Material::FRONT_AND_BACK,
>> opacity);
>>
>> state->setAttributeAndModes(mat,osg::StateAttribute::ON);
>> }
>>
>>
>>___
>>osg-users mailing list
>>osg-users@lists.openscenegraph.org
>><mailto:osg-users@lists.openscenegraph.org>
>>
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>>
>>
>>
>>___
>>osg-users mailing list
>>osg-users@lists.openscenegraph.org
>><mailto:osg-users@lists.openscenegraph.org>
>>
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>>
>>
>>
>>
>> ___
>> osg-users mailing list
>> osg-users@lists.openscenegraph.org
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>
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Re: [osg-users] Transparency on a drawable
(!viewer.getSceneData())
{
osg::notify( osg::FATAL ) << "Unable to load data file.
Exiting." << std::endl;
return 1;
}
// Display, and main loop.
return viewer.run();
}
- Original Message
From: Vincent Bourdier <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>
To: OpenSceneGraph Users mailto:osg-users@lists.openscenegraph.org>>
Sent: Tuesday, July 15, 2008 9:04:23 AM
Subject: Re: [osg-users] Transparency on a drawable
Hi Ulrich
thanks for help.
I use/try this code for the moment :
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat =
(osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
}
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
But nothing appear transparent...
Regards,
Vincent
2008/7/12 Ulrich Hertlein <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>:
Vincent Bourdier wrote:
I do exactly the same things, on Nodes...
stateset->setMode(GL_BLEND,
osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
Are you sure you're doing this last line? It's not in the code
snippet you posted initially...
Cheers,
/ulrich
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|
osg::StateAttribute::OVERRIDE);
osg::Material* mat = (osg::Material*)state->getAttribute
(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
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Re: [osg-users] Transparency on a drawable
Hi
Yes, no solutions seems to work on my problem.
Because all the propositions concern nodes, I permit to remember that I am
looking at a way to set alpha level on a osg::Geometry ...
On node I already have a method using material : set alpha channel, and it
works good... But on my geometry nothing look to work good...
This is all my geometry creator code :
osg::ref_ptr builtGeometry(){
>
> double alpha = 0.1;
> osg::Vec4 grey(0.4,0.4,0.4,1.0);
> osg::Vec4 yellow(1.0,1.0,0.0,1.0);
>
> osg::Geometry* g = new osg::Geometry;
> osg::Vec3Array* vertices= new osg::Vec3Array();
> osg::Vec3Array* normals= new osg::Vec3Array();
> osg::Vec4Array* colors= new osg::Vec4Array();
>
> normals->push_back(osg::Vec3(0,0,1));
> colors->push_back(grey);
>
> //
> //QUAD
> vertices->push_back(osg::Vec3( _width/2.0, _height + _dist, _offset));
> vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist, _offset));
> vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
> _offset));
> vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
> _offset));
>
> if(!_empty)
> g->addPrimitiveSet(new
> osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
> else
> g->addPrimitiveSet(new
> osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,0,4));
>
>
> //-
> //LINE
>
> vertices->push_back(osg::Vec3(0.0, 1.0, _offset));
> vertices->push_back(osg::Vec3(0.0, _dist, _offset));
> colors->push_back(grey);
> g->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,4,2));
>
>
> //
> //LINE_LOOP
>
> vertices->push_back(osg::Vec3( _width/2.0, _height + _dist,
> _offset/2.0));
> vertices->push_back(osg::Vec3(-_width/2.0, _height + _dist,
> _offset/2.0));
> vertices->push_back(osg::Vec3(-_width/2.0, 0.0 + _dist,
> _offset/2.0));
> vertices->push_back(osg::Vec3( _width/2.0, 0.0 + _dist,
> _offset/2.0));
>
> colors->push_back(yellow);
> g->addPrimitiveSet(new
> osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,6,4));
>
> g->setNormalArray(normals);
> g->setVertexArray(vertices);
> g->setColorArray(colors);
>
> g->setNormalBinding(osg::Geometry::BIND_OVERALL);
> g->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
> g->setDataVariance(osg::Object::DYNAMIC);
>
>
> //TRANSPARENCY
>
> osg::StateSet* state = g->getOrCreateStateSet();
>
> state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
> osg::Material* mat = new osg::Material;
> mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
> state->setAttributeAndModes(mat,osg::StateAttribute::ON |
> osg::StateAttribute::OVERRIDE);
>
> osg::BlendFunc* bf = new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
> osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
> state->setAttributeAndModes(bf);
>
> state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
> state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
>
> g->setStateSet(state);
>
> return g;
> }
Thanks for your help.
Regards,
Vincent.
2008/7/15 dimi christop <[EMAIL PROTECTED]>:
> Hi Vincent,
> I see you still havent found a solution. So here I send you a complete
> example of transpareny.
> Its a modification of the Viewer example from the Qucik start guide.
> It loads up a cow and overrides the alpha to 0.1.
> Hope you can start from there.
>
> Dimi
>
> // Viewer Example, A minimal OSG viewer
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
>
> int
> main( int, char ** )
> {
> // Create a Viewer.
> osgViewer::Viewer viewer;
>
> // Load a model and add it to the Viewer.
> osg::ref_ptr nde = osgDB::readNodeFile( "cow.osg" );
>
> // Create StateSet and Material
> osg::StateSet* state2 = nde->getOrCreateStateSet();
> osg::ref_ptr mat2 = new osg::Material;
>
> // Set alpha to 0.1
> mat2->setAlpha(osg::Material::FRONT_AND_BACK, 0.1);
> state2->setAttributeAndModes( mat2.get() , osg::StateAttribute::ON |
> osg::StateAttribute::OVERRIDE);
>
> // Turn on blending
> osg::BlendFunc* bf = new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
> osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
> state2->setAttributeAndModes(bf);
>
> viewer.setSceneData(nde.get());
Re: [osg-users] Transparency on a drawable
Hi Vincent,
I see you still havent found a solution. So here I send you a complete example
of transpareny.
Its a modification of the Viewer example from the Qucik start guide.
It loads up a cow and overrides the alpha to 0.1.
Hope you can start from there.
Dimi
// Viewer Example, A minimal OSG viewer
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
int
main( int, char ** )
{
// Create a Viewer.
osgViewer::Viewer viewer;
// Load a model and add it to the Viewer.
osg::ref_ptr nde = osgDB::readNodeFile( "cow.osg" );
// Create StateSet and Material
osg::StateSet* state2 = nde->getOrCreateStateSet();
osg::ref_ptr mat2 = new osg::Material;
// Set alpha to 0.1
mat2->setAlpha(osg::Material::FRONT_AND_BACK, 0.1);
state2->setAttributeAndModes( mat2.get() , osg::StateAttribute::ON |
osg::StateAttribute::OVERRIDE);
// Turn on blending
osg::BlendFunc* bf = new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
state2->setAttributeAndModes(bf);
viewer.setSceneData(nde.get());
if (!viewer.getSceneData())
{
osg::notify( osg::FATAL ) << "Unable to load data file. Exiting." <<
std::endl;
return 1;
}
// Display, and main loop.
return viewer.run();
}
- Original Message
From: Vincent Bourdier <[EMAIL PROTECTED]>
To: OpenSceneGraph Users
Sent: Tuesday, July 15, 2008 9:04:23 AM
Subject: Re: [osg-users] Transparency on a drawable
Hi Ulrich
thanks for help.
I use/try this code for the moment :
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat =
(osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
}
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
But nothing appear transparent...
Regards,
Vincent
2008/7/12 Ulrich Hertlein <[EMAIL PROTECTED]>:
Vincent Bourdier wrote:
I do exactly the same things, on Nodes...
stateset->setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
Are you sure you're doing this last line? It's not in the code snippet you
posted initially...
Cheers,
/ulrich
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|
osg::StateAttribute::OVERRIDE);
osg::Material* mat = (osg::Material*)state->getAttribute
(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
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Re: [osg-users] Transparency on a drawable
Hi Ulrich
thanks for help.
I use/try this code for the moment :
osg::StateSet* state = g->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
osg::Material* mat =
(osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
}
mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
But nothing appear transparent...
Regards,
Vincent
2008/7/12 Ulrich Hertlein <[EMAIL PROTECTED]>:
> Vincent Bourdier wrote:
>
>> I do exactly the same things, on Nodes...
>>
>>> stateset->setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
>>> osg::StateAttribute::ON );
>>> stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
>>>
>>
> Are you sure you're doing this last line? It's not in the code snippet you
> posted initially...
>
> Cheers,
> /ulrich
>
> double opacity = 0.1;
>>
>> osg::StateSet* state = mygometry->getOrCreateStateSet();
>> state->setMode(GL_BLEND,osg::StateAttribute::ON|
>> osg::StateAttribute::OVERRIDE);
>> osg::Material* mat = (osg::Material*)state->getAttribute
>> (osg::StateAttribute::MATERIAL);
>> if(!mat) {
>> mat = new osg::Material;
>> mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
>> state->setAttributeAndModes(mat,osg::StateAttribute::ON);
>> }
>>
>
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Re: [osg-users] Transparency on a drawable
Vincent Bourdier wrote:
I do exactly the same things, on Nodes...
stateset->setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
Are you sure you're doing this last line? It's not in the code snippet you
posted initially...
Cheers,
/ulrich
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|
osg::StateAttribute::OVERRIDE);
osg::Material* mat = (osg::Material*)state->getAttribute
(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
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Re: [osg-users] Transparency on a drawable
Hi Vincent,
A Drawable (which Geometry inherits from) has an associated StateSet
object the same way that Geodes (and other classes inheriting Node) do,
so the same method should work for your geometry as well. See
http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a01139.html
for more information.
--Will
Vincent Bourdier wrote:
Thanks for help.
I do exactly the same things, on Nodes...
but this time I am looking on a way to do this only on a geometry (So
under a Geode)...
If you have any suggestion..
Regards,
Vincent
2008/7/11 Brian R Hill <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>:
This is what I do:
osg::StateSet * stateset = node->getOrCreateStateSet();
osg::Material * mm =
dynamic_cast(stateset->getAttribute
(osg::StateAttribute::MATERIAL));
if (!mm)
{
mm = new osg::Material;
}
mm->setAlpha(osg::Material::FRONT, transparency);
stateset->setAttributeAndModes( mm, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON);
stateset->setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
Brian
[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> wrote: -
To: "'OpenSceneGraph Users'" mailto:osg-users@lists.openscenegraph.org>>
From: "Gordon Tomlinson" <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>
Sent by: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
Date: 07/11/2008 09:59AM
Subject: Re: [osg-users] Transparency on a drawable
Vincent
You post your initial question at a little over 2 hours ago.. you
need to
give people time to possibly respond maybe 1-2 days
http://www.catb.org/~esr/faqs/smart-questions.html
<http://www.catb.org/%7Eesr/faqs/smart-questions.html>
also a search of the mailing list archive will throw up quite a few
discussions and solutions on this very subject
From: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
[mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>] On Behalf Of
Vincent
Bourdier
Sent: Friday, July 11, 2008 8:54 AM
To: osg
Subject: Re: [osg-users] Transparency on a drawable
No one have any idea of how to set an alpha transparency level on a
geometry ?
It has no texture, juste one color...
Thanks,
Regards,
Vincent.
2008/7/11 Vincent Bourdier < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> >:
Hi All,
Just a simple question on how to set a transparency effect on a
drawable.
My geode contains 2 drawables, and I need only one to be
transparent...
I've tried :
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|
osg::StateAttribute::OVERRIDE);
osg::Material* mat = (osg::Material*)state->getAttribute
(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
Lightning is already set to ON...
But nothing appear transparent...
Thanks,
Regards
Vincent.
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--
Will Dicharry
Stellar Science Ltd Co
smime.p7s
Description: S/MIME Cryptographic Signature
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Re: [osg-users] Transparency on a drawable
Thanks for help.
I do exactly the same things, on Nodes...
but this time I am looking on a way to do this only on a geometry (So under
a Geode)...
If you have any suggestion..
Regards,
Vincent
2008/7/11 Brian R Hill <[EMAIL PROTECTED]>:
> This is what I do:
>
> osg::StateSet * stateset = node->getOrCreateStateSet();
> osg::Material * mm = dynamic_cast(stateset->getAttribute
> (osg::StateAttribute::MATERIAL));
> if (!mm)
> {
> mm = new osg::Material;
> }
> mm->setAlpha(osg::Material::FRONT, transparency);
> stateset->setAttributeAndModes( mm, osg::StateAttribute::OVERRIDE |
> osg::StateAttribute::ON);
> stateset->setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
> osg::StateAttribute::ON );
> stateset->setMode(GL_LIGHTING,osg::StateAttribute::OVERRIDE |
> osg::StateAttribute::ON );
> stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
>
> Brian
> [EMAIL PROTECTED] wrote: -
>
>
> To: "'OpenSceneGraph Users'"
> From: "Gordon Tomlinson" <[EMAIL PROTECTED]>
> Sent by: [EMAIL PROTECTED]
> Date: 07/11/2008 09:59AM
> Subject: Re: [osg-users] Transparency on a drawable
>
>
> Vincent
> You post your initial question at a little over 2 hours ago.. you need to
> give people time to possibly respond maybe 1-2 days
> http://www.catb.org/~esr/faqs/smart-questions.html<http://www.catb.org/%7Eesr/faqs/smart-questions.html>
> also a search of the mailing list archive will throw up quite a few
> discussions and solutions on this very subject
>
>
>
>
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Vincent
> Bourdier
> Sent: Friday, July 11, 2008 8:54 AM
> To: osg
> Subject: Re: [osg-users] Transparency on a drawable
>
>
> No one have any idea of how to set an alpha transparency level on a
> geometry ?
> It has no texture, juste one color...
>
> Thanks,
>
> Regards,
>
> Vincent.
>
>
> 2008/7/11 Vincent Bourdier < [EMAIL PROTECTED] >:
>
> Hi All,
>
> Just a simple question on how to set a transparency effect on a drawable.
>
> My geode contains 2 drawables, and I need only one to be transparent...
>
> I've tried :
>
>
> double opacity = 0.1;
>
>osg::StateSet* state = mygometry->getOrCreateStateSet();
>state->setMode(GL_BLEND,osg::StateAttribute::ON|
>osg::StateAttribute::OVERRIDE);
>osg::Material* mat = (osg::Material*)state->getAttribute
>(osg::StateAttribute::MATERIAL);
>if(!mat) {
>mat = new osg::Material;
>mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
>state->setAttributeAndModes(mat,osg::StateAttribute::ON);
>}
>
>
> Lightning is already set to ON...
>
> But nothing appear transparent...
>
> Thanks,
>
> Regards
>Vincent.
>
>
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>
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>
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Re: [osg-users] Transparency on a drawable
This is what I do:
osg::StateSet * stateset = node->getOrCreateStateSet();
osg::Material * mm = dynamic_cast(stateset->getAttribute
(osg::StateAttribute::MATERIAL));
if (!mm)
{
mm = new osg::Material;
}
mm->setAlpha(osg::Material::FRONT, transparency);
stateset->setAttributeAndModes( mm, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON);
stateset->setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
Brian
[EMAIL PROTECTED] wrote: -
To: "'OpenSceneGraph Users'"
From: "Gordon Tomlinson" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
Date: 07/11/2008 09:59AM
Subject: Re: [osg-users] Transparency on a drawable
Vincent
You post your initial question at a little over 2 hours ago.. you need to
give people time to possibly respond maybe 1-2 days
http://www.catb.org/~esr/faqs/smart-questions.html
also a search of the mailing list archive will throw up quite a few
discussions and solutions on this very subject
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Vincent
Bourdier
Sent: Friday, July 11, 2008 8:54 AM
To: osg
Subject: Re: [osg-users] Transparency on a drawable
No one have any idea of how to set an alpha transparency level on a
geometry ?
It has no texture, juste one color...
Thanks,
Regards,
Vincent.
2008/7/11 Vincent Bourdier < [EMAIL PROTECTED] >:
Hi All,
Just a simple question on how to set a transparency effect on a drawable.
My geode contains 2 drawables, and I need only one to be transparent...
I've tried :
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|
osg::StateAttribute::OVERRIDE);
osg::Material* mat = (osg::Material*)state->getAttribute
(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
Lightning is already set to ON...
But nothing appear transparent...
Thanks,
Regards
Vincent.
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Re: [osg-users] Transparency on a drawable
Vincent
You post your initial question at a little over 2 hours ago.. you need to
give people time to possibly respond maybe 1-2 days
http://www.catb.org/~esr/faqs/smart-questions.html
also a search of the mailing list archive will throw up quite a few
discussions and solutions on this very subject
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Vincent
Bourdier
Sent: Friday, July 11, 2008 8:54 AM
To: osg
Subject: Re: [osg-users] Transparency on a drawable
No one have any idea of how to set an alpha transparency level on a geometry
?
It has no texture, juste one color...
Thanks,
Regards,
Vincent.
2008/7/11 Vincent Bourdier <[EMAIL PROTECTED]>:
Hi All,
Just a simple question on how to set a transparency effect on a drawable.
My geode contains 2 drawables, and I need only one to be transparent...
I've tried :
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRID
E);
osg::Material* mat =
(osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
Lightning is already set to ON...
But nothing appear transparent...
Thanks,
Regards
Vincent.
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Re: [osg-users] Transparency on a drawable
This has been discussed multiple times, have you tried searching the
archives for "transparent" or "blend"? There are also several examples that
show how to do this. Try doing a recursive, case-insensitive grep on your
OSG source tree for "transparent".
The rules for transparency in OSG are not different from those of OpenGL. Do
it just like you would in OpenGL, except use the StateSet setRenderingHint
to control render order.
-Paul
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Vincent
Bourdier
Sent: Friday, July 11, 2008 6:54 AM
To: osg
Subject: Re: [osg-users] Transparency on a drawable
No one have any idea of how to set an alpha transparency level on a geometry
?
It has no texture, juste one color...
Thanks,
Regards,
Vincent.
2008/7/11 Vincent Bourdier <[EMAIL PROTECTED]>:
Hi All,
Just a simple question on how to set a transparency effect on a drawable.
My geode contains 2 drawables, and I need only one to be transparent...
I've tried :
double opacity = 0.1;
osg::StateSet* state = mygometry->getOrCreateStateSet();
state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRID
E);
osg::Material* mat =
(osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
if(!mat) {
mat = new osg::Material;
mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
state->setAttributeAndModes(mat,osg::StateAttribute::ON);
}
Lightning is already set to ON...
But nothing appear transparent...
Thanks,
Regards
Vincent.
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Re: [osg-users] Transparency on a drawable
Hi Stephan
Yes GL_BLEND is on :
osg::StateSet* state = g->getOrCreateStateSet();
>
> state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
> osg::Material* mat =
> (osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
> if(!mat) {
> mat = new osg::Material;
> }
> mat->setAlpha(osg::Material::FRONT_AND_BACK, alpha);
> state->setAttributeAndModes(mat,osg::StateAttribute::ON);
> state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
> state->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
>
2008/7/11 Stephan Maximilian Huber <[EMAIL PROTECTED]>:
> Hi,
>
> Vincent Bourdier schrieb:
>
>> Lightning is already set to ON...
>>
>> But nothing appear transparent...
>>
> is GL_BLEND enabled? a.ka. state->setMode(GL_BLEND,
> osg::StatetAttribute::ON);
>
> cheers
> Stephan
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>
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Re: [osg-users] Transparency on a drawable
Hi, Vincent Bourdier schrieb: Lightning is already set to ON... But nothing appear transparent... is GL_BLEND enabled? a.ka. state->setMode(GL_BLEND, osg::StatetAttribute::ON); cheers Stephan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transparency on a drawable
No one have any idea of how to set an alpha transparency level on a geometry
?
It has no texture, juste one color...
Thanks,
Regards,
Vincent.
2008/7/11 Vincent Bourdier <[EMAIL PROTECTED]>:
> Hi All,
>
> Just a simple question on how to set a transparency effect on a drawable.
>
> My geode contains 2 drawables, and I need only one to be transparent...
>
> I've tried :
>
> double opacity = 0.1;
>>
>> osg::StateSet* state = mygometry->getOrCreateStateSet();
>>
>> state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
>> osg::Material* mat =
>> (osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
>> if(!mat) {
>> mat = new osg::Material;
>> mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
>> state->setAttributeAndModes(mat,osg::StateAttribute::ON);
>> }
>>
>
> Lightning is already set to ON...
>
> But nothing appear transparent...
>
> Thanks,
>
> Regards
> Vincent.
>
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[osg-users] Transparency on a drawable
Hi All,
Just a simple question on how to set a transparency effect on a drawable.
My geode contains 2 drawables, and I need only one to be transparent...
I've tried :
double opacity = 0.1;
>
> osg::StateSet* state = mygometry->getOrCreateStateSet();
>
> state->setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
> osg::Material* mat =
> (osg::Material*)state->getAttribute(osg::StateAttribute::MATERIAL);
> if(!mat) {
> mat = new osg::Material;
> mat->setAlpha(osg::Material::FRONT_AND_BACK, opacity);
> state->setAttributeAndModes(mat,osg::StateAttribute::ON);
> }
>
Lightning is already set to ON...
But nothing appear transparent...
Thanks,
Regards
Vincent.
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