[osg-users] Problems resizing the screen

[Hugo Gomes]

Hello,

im having problems resizing the screen.

I start up a osgViewer::Viewer, with a menu scene for the user to select a
proper resolution before simulation starts.
When the user presses start in the menu, i set the done flag to true (to
escape the main loop), resize the screen (if necessary), set scene data with
a loader, setup the viewport with the resolution, and adjust the modelview
for the given aspect ratio, and set the done flag to false and enterin again
in the loop (viewer-frame()).

To resize im using the osg::GraphicsContext::WindowingSystemInterface. Which
works fine. The problem is the output i get whenever i choose a different
resolution than the one im using:

http://img180.imageshack.us/my.php?image=artifactsafterresizepm1.png



What is happening ? Am i forgeting something ?

Thanks
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[osg-users] BumpMapping osgFX problem

[Hugo Gomes]

Hello,

im having problems with the BumpMapping osgFX, somehow it just seems it
doesn't light the model. Model is only responding to ambient light. Is there
any quirck im forgetting of doing ?

The osgfxbrowser example works fine, so its not a hardware problem...

Here is the code for the light setup:

osg::ref_ptrosg::Light light = new osg::Light;
light-setLightNum( 0 );
light-setDiffuse( osg::Vec4( 1, 1, 1, 1 ) );
light-setSpecular( osg::Vec4( 1, 1, 0.8f, 1 ) );
light-setAmbient( osg::Vec4( 0.2f, 0.2f, 0.2f, 0.2f ) );
light-setPosition( osg::Vec4( 10, -1, 0, 0 ) );

root = new osg::LightSource;
root-setLight( light.get() );
root-setLocalStateSetModes();


Here is the code for the bump mapping FX node:

void ScenePlanet::generatePlanet()
{
PlanetRotateCallback* rotate_cb;
osg::Geode* planet_geode = new osg::Geode();

osg::StateSet* planet_stateset = planet_geode-getOrCreateStateSet();

// get the textures according to the position that they were inserted at
osg::Texture2D* texture = textures-at(0);
osg::Texture2D* normal_map = textures-at(1);
// set them up
planet_stateset-setMode(GL_LIGHTING, osg::StateAttribute::ON);
planet_stateset-setTextureAttributeAndModes( 0, texture,
osg::StateAttribute::ON );
planet_stateset-setTextureAttributeAndModes( 1, normal_map,
osg::StateAttribute::ON );

osg::TessellationHints* hints = new osg::TessellationHints;

hints-setDetailRatio(0.5f);
planet_geode-addDrawable(
new osg::ShapeDrawable(
new osg::Sphere( osg::Vec3( 0.0f,0.0f,0.0f ), 5.0f ) )
);

// set up the effects of the model
osgFX::BumpMapping* bump_fx = new osgFX::BumpMapping();
bump_fx-setEnabled( true );
bump_fx-addChild( planet_geode );
bump_fx-setNormalMapTextureUnit(1);
bump_fx-setDiffuseTextureUnit(0);
bump_fx-setLightNumber(0);

bump_fx-prepareChildren();
//bump_fx-setUpDemo();

// set up a transform to rotate the model
osg::ref_ptrosg::PositionAttitudeTransform xform =
new
osg::PositionAttitudeTransform();
xform-setPosition( osg::Vec3( 1.5, 0, 1 ) );
xform-setPivotPoint( osg::Vec3( 0, 0, 0 ) );

rotate_cb = new PlanetRotateCallback;
xform-setUpdateCallback( rotate_cb );
xform-addChild( bump_fx );

root-addChild( xform.get() );
}

Here is the code for the texture generation:

Diffuse Texture:


osg_img-setImage( size, size, 1,
   4, GL_RGBA, GL_UNSIGNED_BYTE,
   writer.GetImageData(),
   osg::Image::USE_NEW_DELETE );
texture-setImage(osg_img);
texture-setFilter(osg::Texture::MIN_FILTER,
osg::Texture::LINEAR_MIPMAP_LINEAR);
texture-setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
texture-setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
texture-setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
texture-setMaxAnisotropy( 8 );

textures-push_back( texture );



Normal Texture:


osg_normalmap_img-setImage( size, size, 1,
 4, GL_RGBA, GL_UNSIGNED_BYTE,
 writer.GetImageData(),
 osg::Image::USE_NEW_DELETE );
normalmap_texture-setImage(osg_normalmap_img);
normalmap_texture-setFilter(osg::Texture::MIN_FILTER,
osg::Texture::LINEAR_MIPMAP_LINEAR);
normalmap_texture-setFilter(osg::Texture::MAG_FILTER,
osg::Texture::LINEAR);
normalmap_texture-setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
normalmap_texture-setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
normalmap_texture-setMaxAnisotropy(8);

textures-push_back( normalmap_texture );
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[osg-users] GL_LINE and GL_POINT question

[Hugo Gomes]

Hello,

how do i set the GL_POINT_SIZE and equivalent GL_LINE_SIZE ?


Thanks in advance
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Re: [osg-users] GL_LINE and GL_POINT question

[Hugo Gomes]

Aren't they wrapped by osg ? ...
Can't i specify that info in a stateset ?

On Wed, Jul 2, 2008 at 1:36 AM, Willy P [EMAIL PROTECTED] wrote:

 http://www.opengl.org/sdk/docs/man/xhtml/glLineWidth.xml


 On Tue, Jul 1, 2008 at 4:51 PM, Hugo Gomes [EMAIL PROTECTED]
 wrote:
  Hello,
 
  how do i set the GL_POINT_SIZE and equivalent GL_LINE_SIZE ?
 
 
  Thanks in advance
 
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[osg-users] Changing fullscreen resolution with osg::Viewer

[Hugo Gomes]

Hello, i'm new to osg, and i've been building some basic scenes to learn
about it. Yet i haven't been able to change the screen resolution when in
fullscreen mode. I'm using a CompositeViewer in a main class, and a Viewer
in each scene, is there a simple way to change it without changing to SDL or
some other lib ? What about screen refresh rate, is it also possible to
change it using the CompositeViewer ?


Thanks in advance
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