FGFS-4.1/OpenSceneGraph
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Fixes to osg::Texture's handling of anisotropy updating and

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hardware generate mip mapping.

Added switching off generate mip map from osgText::Font.cpp.

Changed savedmodel.osg to saved_model.osg in ViewerEventHandler.
This commit is contained in:
Robert Osfield
2003-04-01 20:32:57 +00:00
parent b59760482f
commit 5a974ab091
4 changed files with 219 additions and 33 deletions
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174
examples/osgtexture2D/osgtexture2D.cpp
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@@ -30,6 +30,11 @@ public:
_currPos(0),
_prevTime(0.0)
{
// start with a mip mapped mode to ensure that
_minFilterList.push_back(osg::Texture2D::LINEAR_MIPMAP_LINEAR);
_magFilterList.push_back(osg::Texture2D::LINEAR);
_textList.push_back("Tri-linear mip mapping (default filtering)\nsetFilter(MIN_FILTER,LINEAR_MIP_LINEAR)\nsetFilter(MAG_FILTER,LINEAR)");
_minFilterList.push_back(osg::Texture2D::NEAREST);
_magFilterList.push_back(osg::Texture2D::NEAREST);
_textList.push_back("Nearest filtering\nsetFilter(MIN_FILTER,NEAREST)\nsetFilter(MAG_FILTER,NEAREST)");
@@ -50,9 +55,6 @@ public:
_magFilterList.push_back(osg::Texture2D::LINEAR);
_textList.push_back("bi-linear mip mapping\nsetFilter(MIN_FILTER,NEAREST_MIPMAP_LINEAR)\nsetFilter(MAG_FILTER,LINEAR)");
_minFilterList.push_back(osg::Texture2D::LINEAR_MIPMAP_LINEAR);
_magFilterList.push_back(osg::Texture2D::LINEAR);
_textList.push_back("Tri-linear mip mapping (default filtering)\nsetFilter(MIN_FILTER,LINEAR_MIP_LINEAR)\nsetFilter(MAG_FILTER,LINEAR)");
setValues();
}
@@ -146,6 +148,7 @@ osg::Node* createFilterWall(osg::BoundingBox& bb,const std::string& filename)
// set up the texture state.
osg::Texture2D* texture = new osg::Texture2D;
texture->setDataVariance(osg::Object::DYNAMIC); // protect from being optimized away as static state.
texture->setImage(osgDB::readImageFile(filename));
osg::StateSet* stateset = geom->getOrCreateStateSet();
@@ -297,6 +300,7 @@ osg::Node* createAnisotripicWall(osg::BoundingBox& bb,const std::string& filenam
// set up the texture state.
osg::Texture2D* texture = new osg::Texture2D;
texture->setDataVariance(osg::Object::DYNAMIC); // protect from being optimized away as static state.
texture->setImage(osgDB::readImageFile(filename));
osg::StateSet* stateset = geom->getOrCreateStateSet();
@@ -328,7 +332,7 @@ osg::Node* createAnisotripicWall(osg::BoundingBox& bb,const std::string& filenam
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// filter wall and animation callback.
// wrap wall and animation callback.
//
class WrapCallback : public osg::NodeCallback
{
@@ -352,7 +356,7 @@ public:
_textList.push_back("Clamp to border color extension\nsetWrap(WRAP_S,CLAMP_TO_BORDER)");
_wrapList.push_back(osg::Texture2D::REPEAT);
_textList.push_back("Repear wrap\nsetWrap(WRAP_S,REPEAT)");
_textList.push_back("Repeat wrap\nsetWrap(WRAP_S,REPEAT)");
_wrapList.push_back(osg::Texture2D::MIRROR);
_textList.push_back("Mirror wrap extension\nsetWrap(WRAP_S,MIRROR)");
@@ -435,7 +439,7 @@ osg::Node* createWrapWall(osg::BoundingBox& bb,const std::string& filename)
geom->setTexCoordArray(0,texcoords);
osg::Vec3Array* normals = new osg::Vec3Array(1);
(*normals)[0].set(0.0f,-1.0f,0.0f);
(*normals)[0].set(-1.0f,0.0f,0.0f);
geom->setNormalArray(normals);
geom->setNormalBinding(osg::Geometry::BIND_OVERALL);
@@ -448,6 +452,7 @@ osg::Node* createWrapWall(osg::BoundingBox& bb,const std::string& filename)
// set up the texture state.
osg::Texture2D* texture = new osg::Texture2D;
texture->setDataVariance(osg::Object::DYNAMIC); // protect from being optimized away as static state.
texture->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,0.5f)); // only used when wrap is set to CLAMP_TO_BORDER
texture->setImage(osgDB::readImageFile(filename));
@@ -482,12 +487,156 @@ osg::Node* createWrapWall(osg::BoundingBox& bb,const std::string& filename)
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// filter wall and animation callback.
// sublooad wall and animation callback.
//
osg::Node* createSubloadWall(osg::BoundingBox& bb,const std::string& filename)
class ImageUpdateCallback : public osg::NodeCallback
{
return 0;
public:
ImageUpdateCallback(osg::Texture2D* texture,osgText::Text* text,double delay=1.0):
_texture(texture),
_text(text),
_delay(delay),
_currPos(0),
_prevTime(0.0)
{
_imageList.push_back(osgDB::readImageFile("dog_left_eye.jpg"));
_textList.push_back("Subloaded Image 1 - dog_left_eye.jpg");
_imageList.push_back(osgDB::readImageFile("dog_right_eye.jpg"));
_textList.push_back("Subloaded Image 2 - dog_right_eye.jpg");
setValues();
}
virtual void operator()(osg::Node*, osg::NodeVisitor* nv)
{
if (nv->getFrameStamp())
{
double currTime = nv->getFrameStamp()->getReferenceTime();
if (currTime-_prevTime>_delay)
{
// update filter modes and text.
setValues();
// advance the current positon, wrap round if required.
_currPos++;
if (_currPos>=_imageList.size()) _currPos=0;
// record time
_prevTime = currTime;
}
}
}
void setValues()
{
// Note, as long as the images are the same dimensions subloading will be used
// to update the textures. If dimensions change then the texture objects have
// to be deleted and re-recreated.
//
// The load/subload happens during the draw traversal so doesn't happen on
// the setImage which just updates internal pointers and modifed flags.
_texture->setImage(_imageList[_currPos].get());
//_texture->dirtyTextureObject();
_text->setText(_textList[_currPos]);
}
protected:
typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
typedef std::vector<std::string> TextList;
osg::ref_ptr<osg::Texture2D> _texture;
osg::ref_ptr<osgText::Text> _text;
double _delay;
ImageList _imageList;
TextList _textList;
unsigned int _currPos;
double _prevTime;
};
osg::Node* createSubloadWall(osg::BoundingBox& bb)
{
osg::Group* group = new osg::Group;
// left hand side of bounding box.
osg::Vec3 top_left(bb.xMin(),bb.yMax(),bb.zMax());
osg::Vec3 bottom_left(bb.xMin(),bb.yMax(),bb.zMin());
osg::Vec3 bottom_right(bb.xMax(),bb.yMax(),bb.zMin());
osg::Vec3 top_right(bb.xMax(),bb.yMax(),bb.zMax());
osg::Vec3 center((bb.xMax()+bb.xMin())*0.5f,bb.yMax(),(bb.zMin()+bb.zMax())*0.5f);
float height = bb.zMax()-bb.zMin();
// create the geometry for the wall.
osg::Geometry* geom = new osg::Geometry;
osg::Vec3Array* vertices = new osg::Vec3Array(4);
(*vertices)[0] = top_left;
(*vertices)[1] = bottom_left;
(*vertices)[2] = bottom_right;
(*vertices)[3] = top_right;
geom->setVertexArray(vertices);
osg::Vec2Array* texcoords = new osg::Vec2Array(4);
(*texcoords)[0].set(0.0f,1.0f);
(*texcoords)[1].set(0.0f,0.0f);
(*texcoords)[2].set(1.0f,0.0f);
(*texcoords)[3].set(1.0f,1.0f);
geom->setTexCoordArray(0,texcoords);
osg::Vec3Array* normals = new osg::Vec3Array(1);
(*normals)[0].set(0.0f,-1.0f,0.0f);
geom->setNormalArray(normals);
geom->setNormalBinding(osg::Geometry::BIND_OVERALL);
geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS,0,4));
osg::Geode* geom_geode = new osg::Geode;
geom_geode->addDrawable(geom);
group->addChild(geom_geode);
// set up the texture state.
osg::Texture2D* texture = new osg::Texture2D;
texture->setDataVariance(osg::Object::DYNAMIC); // protect from being optimized away as static state.
texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
osg::StateSet* stateset = geom->getOrCreateStateSet();
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
// create the text label.
osgText::Text* text = new osgText::Text;
text->setFont("fonts/arial.ttf");
text->setPosition(center);
text->setCharacterSize(height*0.03f);
text->setAlignment(osgText::Text::CENTER_CENTER);
text->setAxisAlignment(osgText::Text::XZ_PLANE);
osg::Geode* text_geode = new osg::Geode;
text_geode->addDrawable(text);
osg::StateSet* text_stateset = text_geode->getOrCreateStateSet();
text_stateset->setAttributeAndModes(new osg::PolygonOffset(-1.0f,-1.0f),osg::StateAttribute::ON);
group->addChild(text_geode);
// set the update callback to cycle through the various min and mag filter modes.
group->setUpdateCallback(new ImageUpdateCallback(texture,text));
return group;
}
@@ -496,13 +645,16 @@ osg::Node* createModel()
// create the root node which will hold the model.
osg::Group* root = new osg::Group();
// turn off lighting
root->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
osg::BoundingBox bb(0.0f,0.0f,0.0f,1.0f,1.0f,1.0f);
root->addChild(createFilterWall(bb,"Images/lz.rgb"));
root->addChild(createAnisotripicWall(bb,"Images/tank.rgb"));
root->addChild(createAnisotripicWall(bb,"Images/primitives.gif"));
root->addChild(createWrapWall(bb,"Images/tree0.rgba"));
root->addChild(createSubloadWall(bb,"Images/tree0.rgba"));
root->addChild(createSubloadWall(bb));
return root;
}