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Improves to CullStack.

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From M.Grngr. options support for f=switching off internal imagery in .ive files
This commit is contained in:
Robert Osfield
2003-09-26 11:20:43 +00:00
parent 7fb9f6be4b
commit f8df9991b2
7 changed files with 205 additions and 67 deletions
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166
examples/osgforest/osgforest.cpp
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@@ -21,32 +21,129 @@
// for the grid data..
#include "../osghangglide/terrain_coords.h"
class Tree : public osg::Referenced
// class to create the forest and manage the movement between various techniques.
class ForestTechniqueManager : public osg::Referenced
{
public:
Tree():
_color(255,255,255,255),
_width(1.0f),
_height(1.0f),
_type(0) {}
ForestTechniqueManager() {}
Tree(const osg::Vec3& position, const osg::UByte4& color, float width, float height, unsigned int type):
_position(position),
_color(color),
_width(width),
_height(height),
_type(type) {}
class Tree : public osg::Referenced
{
public:
Tree():
_color(255,255,255,255),
_width(1.0f),
_height(1.0f),
_type(0) {}
Tree(const osg::Vec3& position, const osg::UByte4& color, float width, float height, unsigned int type):
_position(position),
_color(color),
_width(width),
_height(height),
_type(type) {}
osg::Vec3 _position;
osg::UByte4 _color;
float _width;
float _height;
unsigned int _type;
};
typedef std::vector< osg::ref_ptr<Tree> > TreeList;
float random(float min,float max) { return min + (max-min)*(float)rand()/(float)RAND_MAX; }
int random(int min,int max) { return min + (int)((float)(max-min)*(float)rand()/(float)RAND_MAX); }
osg::Geode* createTerrain(const osg::Vec3& origin, const osg::Vec3& size);
void createTreeList(osg::Node* terrain,const osg::Vec3& origin, const osg::Vec3& size,unsigned int numTreesToCreate,TreeList& trees);
osg::Geometry* createSprite( float w, float h, osg::UByte4 color );
osg::Geometry* createOrthogonalQuads( const osg::Vec3& pos, float w, float h, osg::UByte4 color );
osg::Node* createScene();
void advanceToNextTechnique(int delta=1)
{
if (_techniqueSwitch.valid())
{
_currentTechnique = (_currentTechnique + delta)%_techniqueSwitch->getNumChildren();
_techniqueSwitch->setSingleChildOn(_currentTechnique);
}
}
osg::ref_ptr<osg::Switch> _techniqueSwitch;
int _currentTechnique;
osg::Vec3 _position;
osg::UByte4 _color;
float _width;
float _height;
unsigned int _type;
};
// event handler to capture keyboard events and use them to advance the technique used for rendering
class TechniqueEventHandler : public osgGA::GUIEventHandler, public osg::NodeCallback
{
public:
osg::Geode* createTerrain(const osg::Vec3& origin, const osg::Vec3& size)
TechniqueEventHandler(ForestTechniqueManager* ttm=0) { _ForestTechniqueManager = ttm; }
META_Object(osgforestApp,TechniqueEventHandler);
virtual void accept(osgGA::GUIEventHandlerVisitor& v) { v.visit(*this); }
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&);
virtual void getUsage(osg::ApplicationUsage& usage) const;
protected:
~TechniqueEventHandler() {}
TechniqueEventHandler(const TechniqueEventHandler&,const osg::CopyOp&) {}
osg::ref_ptr<ForestTechniqueManager> _ForestTechniqueManager;
};
bool TechniqueEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='n' ||
ea.getKey()==osgGA::GUIEventAdapter::KEY_Right ||
ea.getKey()==osgGA::GUIEventAdapter::KEY_KP_Right)
{
_ForestTechniqueManager->advanceToNextTechnique(1);
return true;
}
else if (ea.getKey()=='p' ||
ea.getKey()==osgGA::GUIEventAdapter::KEY_Left ||
ea.getKey()==osgGA::GUIEventAdapter::KEY_KP_Left)
{
_ForestTechniqueManager->advanceToNextTechnique(-1);
return true;
}
return false;
}
default:
return false;
}
}
void TechniqueEventHandler::getUsage(osg::ApplicationUsage& usage) const
{
usage.addKeyboardMouseBinding("n or Left Arrow","Advance to next technique");
usage.addKeyboardMouseBinding("p or Right Array","Move to previous technique");
}
osg::Geode* ForestTechniqueManager::createTerrain(const osg::Vec3& origin, const osg::Vec3& size)
{
osg::Geode* geode = new osg::Geode();
@@ -166,12 +263,7 @@ osg::Geode* createTerrain(const osg::Vec3& origin, const osg::Vec3& size)
return geode;
}
typedef std::vector< osg::ref_ptr<Tree> > TreeList;
float random(float min,float max) { return min + (max-min)*(float)rand()/(float)RAND_MAX; }
int random(int min,int max) { return min + (int)((float)(max-min)*(float)rand()/(float)RAND_MAX); }
void createTreeList(osg::Node* terrain,const osg::Vec3& origin, const osg::Vec3& size,unsigned int numTreesToCreate,TreeList& trees)
void ForestTechniqueManager::createTreeList(osg::Node* terrain,const osg::Vec3& origin, const osg::Vec3& size,unsigned int numTreesToCreate,TreeList& trees)
{
float max_TreeHeight = sqrtf(size.length2()/(float)numTreesToCreate);
@@ -218,7 +310,7 @@ void createTreeList(osg::Node* terrain,const osg::Vec3& origin, const osg::Vec3&
}
}
osg::Geometry* createSprite( float w, float h, osg::UByte4 color )
osg::Geometry* ForestTechniqueManager::createSprite( float w, float h, osg::UByte4 color )
{
// set up the coords
osg::Vec3Array& v = *(new osg::Vec3Array(4));
@@ -251,7 +343,7 @@ osg::Geometry* createSprite( float w, float h, osg::UByte4 color )
return geom;
}
osg::Geometry* createOrthogonalQuads( const osg::Vec3& pos, float w, float h, osg::UByte4 color )
osg::Geometry* ForestTechniqueManager::createOrthogonalQuads( const osg::Vec3& pos, float w, float h, osg::UByte4 color )
{
// set up the coords
osg::Vec3Array& v = *(new osg::Vec3Array(8));
@@ -298,7 +390,7 @@ osg::Geometry* createOrthogonalQuads( const osg::Vec3& pos, float w, float h, os
return geom;
}
osg::Node* createScene()
osg::Node* ForestTechniqueManager::createScene()
{
osg::Vec3 origin(0.0f,0.0f,0.0f);
osg::Vec3 size(1000.0f,1000.0f,200.0f);
@@ -329,7 +421,7 @@ osg::Node* createScene()
}
osg::Switch* switchNode = new osg::Switch;
_techniqueSwitch = new osg::Switch;
{
osg::Billboard* billboard = new osg::Billboard;
@@ -343,7 +435,7 @@ osg::Node* createScene()
billboard->addDrawable(createSprite(tree._width,tree._height,tree._color),tree._position);
}
switchNode->addChild(billboard);
_techniqueSwitch->addChild(billboard);
}
{
@@ -358,7 +450,7 @@ osg::Node* createScene()
geode->addDrawable(createOrthogonalQuads(tree._position,tree._width,tree._height,tree._color));
}
switchNode->addChild(geode);
_techniqueSwitch->addChild(geode);
}
{
@@ -383,15 +475,17 @@ osg::Node* createScene()
transform_group->addChild(transform);
}
switchNode->addChild(transform_group);
_techniqueSwitch->addChild(transform_group);
}
switchNode->setSingleChildOn(1);
_currentTechnique = 0;
_techniqueSwitch->setSingleChildOn(_currentTechnique);
osg::Group* scene = new osg::Group;
scene->addChild(terrain.get());
scene->addChild(switchNode);
scene->addChild(_techniqueSwitch.get());
return scene;
}
@@ -412,6 +506,10 @@ int main( int argc, char **argv )
// set up the value with sensible default event handlers.
viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
osg::ref_ptr<ForestTechniqueManager> ttm = new ForestTechniqueManager;
viewer.getEventHandlerList().push_front(new TechniqueEventHandler(ttm.get()));
// get details on keyboard and mouse bindings used by the viewer.
viewer.getUsage(*arguments.getApplicationUsage());
@@ -433,7 +531,7 @@ int main( int argc, char **argv )
return 1;
}
osg::Node* node = createScene();
osg::Node* node = ttm->createScene();
// add model to viewer.
viewer.setSceneData( node );