FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Clean up of the logo demo.

Browse Source
This commit is contained in:
Robert Osfield
2003-02-11 12:37:48 +00:00
parent 1ab232b113
commit 2eea610703
1 changed files with 129 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

145
src/Demos/osglogo/osglogo.cpp
View File

@@ -4,10 +4,13 @@
#include <osg/Texture2D>
#include <osg/Geometry>
#include <osg/MatrixTransform>
#include <osg/PositionAttitudeTransform>
#include <osg/BlendFunc>
#include <osg/ClearNode>
#include <osgUtil/Tesselator>
#include <osgUtil/TransformCallback>
#include <osgUtil/CullVisitor>
#include <osgText/Text>
@@ -20,6 +23,87 @@
//#include "CreateShadowedScene.h"
class MyBillboardTransform : public osg::PositionAttitudeTransform
{
public:
MyBillboardTransform():
_axis(0.0f,0.0f,1.0f),
_normal(0.0f,-1.0f,0.0f)
{
}
bool computeLocalToWorldMatrix(osg::Matrix& matrix,osg::NodeVisitor* nv) const
{
if (_referenceFrame==RELATIVE_TO_PARENTS)
{
osg::Quat billboardRotation;
osgUtil::CullVisitor* cullvisitor = dynamic_cast<osgUtil::CullVisitor*>(nv);
if (cullvisitor)
{
osg::Vec3 eyevector = cullvisitor->getEyeLocal()-_position;
eyevector.normalize();
osg::Vec3 side = _axis^_normal;
side.normalize();
float angle = acos(eyevector*side);
billboardRotation.makeRotate(osg::PI_2-angle,_axis);
}
matrix.preMult(osg::Matrix::translate(-_pivotPoint)*
osg::Matrix::rotate(_attitude)*
osg::Matrix::rotate(billboardRotation)*
osg::Matrix::translate(_position));
}
else // absolute
{
matrix = osg::Matrix::translate(-_pivotPoint)*
osg::Matrix::rotate(_attitude)*
osg::Matrix::translate(_position);
}
return true;
}
bool computeWorldToLocalMatrix(osg::Matrix& matrix,osg::NodeVisitor*) const
{
if (_referenceFrame==RELATIVE_TO_PARENTS)
{
osg::Quat billboardRotation;
matrix.postMult(osg::Matrix::translate(-_position)*
osg::Matrix::rotate(billboardRotation.inverse())*
osg::Matrix::rotate(_attitude.inverse())*
osg::Matrix::translate(_pivotPoint));
}
else // absolute
{
matrix = osg::Matrix::translate(-_position)*
osg::Matrix::rotate(_attitude.inverse())*
osg::Matrix::translate(_pivotPoint);
}
return true;
}
void setAxis(const osg::Vec3& axis) { _axis = axis; }
void setNormal(const osg::Vec3& normal) { _normal = normal; }
protected:
virtual ~MyBillboardTransform() {}
osg::Vec3 _axis;
osg::Vec3 _normal;
};
osg::Geometry* createWing(const osg::Vec3& left, const osg::Vec3& nose, const osg::Vec3& right,float chordRatio,const osg::Vec4& color)
{
osg::Geometry* geom = new osg::Geometry;
@@ -97,17 +181,28 @@ osg:: Node* createTextLeft(const osg::BoundingBox& bb)
std::string font("fonts/arial.ttf");
//osgText::Text* text = new osgText::Text(new osgText::PolygonFont(font,80, 3));
osgText::Text* text = new osgText::Text(new osgText::TextureFont(font,85));
osgText::Text* text = new osgText::Text(new osgText::TextureFont(font,100));
text->setText("OpenSceneGraph");
text->setAlignment(osgText::Text::RIGHT_CENTER);
text->setAxisAlignment(osgText::Text::XZ_PLANE);
text->setPosition(bb.center()-osg::Vec3((bb.xMax()-bb.xMin()),-(bb.yMax()-bb.yMin())*0.5f,(bb.zMax()-bb.zMin())*0.2f));
text->setPosition(bb.center()-osg::Vec3((bb.xMax()-bb.xMin()),-(bb.yMax()-bb.yMin())*0.5f,(bb.zMax()-bb.zMin())*0.3f));
//text->setColor(osg::Vec4(0.37f,0.48f,0.67f,1.0f)); // Neil's orignal OSG colour
text->setColor(osg::Vec4(0.20f,0.45f,0.60f,1.0f)); // OGL logo colour
osg::StateSet* stateset = text->getOrCreateStateSet();
osgText::Text* subscript = new osgText::Text(new osgText::TextureFont(font,45));
subscript->setText("Professional Services");
subscript->setAlignment(osgText::Text::RIGHT_CENTER);
subscript->setAxisAlignment(osgText::Text::XZ_PLANE);
subscript->setPosition(bb.center()-osg::Vec3((bb.xMax()-bb.xMin())*3.5f,-(bb.yMax()-bb.yMin())*0.3f,(bb.zMax()-bb.zMin())*0.7f));
subscript->setColor(osg::Vec4(0.0f,0.0f,0.0f,1.0f)); // black
osg::StateSet* stateset = geode->getOrCreateStateSet();
osg::BlendFunc *transp= new osg::BlendFunc();
@@ -120,6 +215,8 @@ osg:: Node* createTextLeft(const osg::BoundingBox& bb)
geode->addDrawable( text );
geode->addDrawable( subscript );
return geode;
}
@@ -127,7 +224,7 @@ osg:: Node* createGlobe(const osg::BoundingBox& bb,float ratio)
{
osg::Geode* geode = new osg::Geode();
osg::StateSet* stateset = new osg::StateSet();
osg::StateSet* stateset = geode->getOrCreateStateSet();
osg::Image* image = osgDB::readImageFile("Images/land_shallow_topo_2048.jpg");
if (image)
@@ -138,7 +235,9 @@ osg:: Node* createGlobe(const osg::BoundingBox& bb,float ratio)
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
}
geode->setStateSet( stateset );
osg::Material* material = new osg::Material;
stateset->setAttribute(material);
// the globe
geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(bb.center(),bb.radius()*ratio)));
@@ -274,13 +373,24 @@ osg::Node* createLogo()
// create a group to hold the whole model.
osg::Group* logo_group = new osg::Group;
// create a transform to orientate the box and globe.
osg::MatrixTransform* xform = new osg::MatrixTransform;
xform->setDataVariance(osg::Object::STATIC);
xform->setMatrix(osg::Matrix::translate(-bb.center())*
osg::Matrix::rotate(-osg::inDegrees(45.0f),0.0f,0.0f,1.0f)*
osg::Matrix::rotate(osg::inDegrees(45.0f),1.0f,0.0f,0.0f)*
osg::Matrix::translate(bb.center()));
osg::Quat r1,r2;
r1.makeRotate(-osg::inDegrees(45.0f),0.0f,0.0f,1.0f);
r2.makeRotate(osg::inDegrees(45.0f),1.0f,0.0f,0.0f);
MyBillboardTransform* xform = new MyBillboardTransform;
xform->setPivotPoint(bb.center());
xform->setPosition(bb.center());
xform->setAttitude(r1*r2);
// // create a transform to orientate the box and globe.
// osg::MatrixTransform* xform = new osg::MatrixTransform;
// xform->setDataVariance(osg::Object::STATIC);
// xform->setMatrix(osg::Matrix::translate(-bb.center())*
// osg::Matrix::rotate(-osg::inDegrees(45.0f),0.0f,0.0f,1.0f)*
// osg::Matrix::rotate(osg::inDegrees(45.0f),1.0f,0.0f,0.0f)*
// osg::Matrix::translate(bb.center()));
// add the box and globe to it.
//xform->addChild(createBox(bb,chordRatio));
@@ -297,13 +407,16 @@ osg::Node* createLogo()
// create the backdrop to render the shadow to.
osg::Vec3 corner(-800.0f,150.0f,-100.0f);
osg::Vec3 corner(-900.0f,150.0f,-100.0f);
osg::Vec3 top(0.0f,0.0f,300.0f); top += corner;
osg::Vec3 right(1000.0f,0.0f,0.0f); right += corner;
osg::Vec3 right(1100.0f,0.0f,0.0f); right += corner;
osg::Group* backdrop = new osg::Group;
backdrop->addChild(createBackdrop(corner,top,right));
// osg::Group* backdrop = new osg::Group;
// backdrop->addChild(createBackdrop(corner,top,right));
osg::ClearNode* backdrop = new osg::ClearNode;
backdrop->setClearColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
//osg::Vec3 lightPosition(-500.0f,-2500.0f,500.0f);
//osg::Node* scene = createShadowedScene(logo_group,backdrop,lightPosition,0.0f,0);