FGFS-4.1/OpenSceneGraph
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Added project down to base implementation.

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This commit is contained in:
Robert Osfield 2007-05-28 13:56:26 +00:00
parent 8cf0704930
commit 4abacc9d3d
2 changed files with 159 additions and 33 deletions
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4
examples/osganimate/osganimate.cpp
View File

@ -181,6 +181,7 @@ osg::Node* createModel(bool overlay, osgSim::OverlayNode::OverlayTechnique techn
osg::Group* root = new osg::Group;
float baseHeight = center.z()-radius*0.6;
osg::Node* baseModel = createBase(center-osg::Vec3(0.0f,0.0f,radius*0.5),radius);
osg::Node* movingModel = createMovingModel(center,radius*0.8f);
@ -189,6 +190,7 @@ osg::Node* createModel(bool overlay, osgSim::OverlayNode::OverlayTechnique techn
osgSim::OverlayNode* overlayNode = new osgSim::OverlayNode(technique);
overlayNode->setContinuousUpdate(true);
overlayNode->setOverlaySubgraph(movingModel);
overlayNode->setOverlayBaseHeight(baseHeight);
overlayNode->addChild(baseModel);
root->addChild(overlayNode);
}
@ -260,6 +262,8 @@ int main( int argc, char **argv )
// normal viewer usage.
viewer.setUpViewOnSingleScreen(1);
return viewer.run();
#endif

188
src/osgSim/OverlayNode.cpp
View File

@ -81,18 +81,18 @@ public:
Face& face = createFace();
face.plane.set(0.0,1.0,0.0,1.0);
face.vertices.push_back(v000);
face.vertices.push_back(v010);
face.vertices.push_back(v110);
face.vertices.push_back(v100);
face.vertices.push_back(v101);
face.vertices.push_back(v001);
}
{ // top plane.
Face& face = createFace();
face.plane.set(0.0,-1.0,0.0,1.0);
face.vertices.push_back(v001);
face.vertices.push_back(v101);
face.vertices.push_back(v111);
face.vertices.push_back(v011);
face.vertices.push_back(v010);
face.vertices.push_back(v110);
}
if (withNear)
@ -100,24 +100,30 @@ public:
Face& face = createFace();
face.plane.set(0.0,0.0,-1.0,1.0);
face.vertices.push_back(v000);
face.vertices.push_back(v010);
face.vertices.push_back(v110);
face.vertices.push_back(v100);
face.vertices.push_back(v101);
face.vertices.push_back(v001);
}
if (withFar)
{ // far plane
Face& face = createFace();
face.plane.set(0.0,0.0,1.0,1.0);
face.vertices.push_back(v010);
face.vertices.push_back(v011);
face.vertices.push_back(v001);
face.vertices.push_back(v101);
face.vertices.push_back(v111);
face.vertices.push_back(v110);
face.vertices.push_back(v011);
}
}
void setToBoundingBox(const osg::BoundingBox& bb)
{
#if 0
osg::notify(osg::NOTICE)<<"setToBoundingBox xrange "<<bb.xMin()<<" "<<bb.xMax()<<std::endl;
osg::notify(osg::NOTICE)<<" "<<bb.yMin()<<" "<<bb.yMax()<<std::endl;
osg::notify(osg::NOTICE)<<" "<<bb.zMin()<<" "<<bb.zMax()<<std::endl;
#endif
const osg::Vec3d v000(bb.xMin(),bb.yMin(), bb.zMin());
const osg::Vec3d v010(bb.xMin(),bb.yMax(), bb.zMin());
const osg::Vec3d v001(bb.xMin(),bb.yMin(), bb.zMax());
@ -129,7 +135,7 @@ public:
_faces.clear();
{ // left plane.
{ // x min plane
Face& face = createFace();
face.plane.set(1.0,0.0,0.0,-bb.xMin());
face.vertices.push_back(v000);
@ -138,7 +144,7 @@ public:
face.vertices.push_back(v010);
}
{ // right plane.
{ // x max plane.
Face& face = createFace();
face.plane.set(-1.0,0.0,0.0,bb.xMax());
face.vertices.push_back(v100);
@ -147,39 +153,39 @@ public:
face.vertices.push_back(v101);
}
{ // bottom plane.
{ // y min plane.
Face& face = createFace();
face.plane.set(0.0,1.0,0.0,-bb.yMin());
face.vertices.push_back(v000);
face.vertices.push_back(v010);
face.vertices.push_back(v110);
face.vertices.push_back(v100);
face.vertices.push_back(v101);
face.vertices.push_back(v001);
}
{ // top plane.
{ // y max plane.
Face& face = createFace();
face.plane.set(0.0,-1.0,0.0,bb.yMax());
face.vertices.push_back(v001);
face.vertices.push_back(v101);
face.vertices.push_back(v111);
face.vertices.push_back(v011);
face.vertices.push_back(v010);
face.vertices.push_back(v110);
}
{ // near plane
{ // z min plane
Face& face = createFace();
face.plane.set(0.0,0.0,1.0,-bb.zMin());
face.vertices.push_back(v000);
face.vertices.push_back(v010);
face.vertices.push_back(v110);
face.vertices.push_back(v100);
face.vertices.push_back(v101);
face.vertices.push_back(v001);
}
{ // far plane
{ // z max plane
Face& face = createFace();
face.plane.set(0.0,0.0,-1.0,bb.zMax());
face.vertices.push_back(v010);
face.vertices.push_back(v011);
face.vertices.push_back(v001);
face.vertices.push_back(v101);
face.vertices.push_back(v111);
face.vertices.push_back(v110);
face.vertices.push_back(v011);
}
}
@ -322,9 +328,126 @@ public:
}
void projectDowntoBase(const osg::Vec3d& normal, double minHeight)
void projectDowntoBase(const osg::Vec3d& control, const osg::Vec3d& normal)
{
osg::notify(osg::NOTICE)<<"CustomPolytop::projectDowntoBase not implementated yet."<<std::endl;
// osg::notify(osg::NOTICE)<<"CustomPolytope::projectDowntoBase not implementated yet."<<std::endl;
Faces removedFaces;
Faces::iterator itr;
for(itr = _faces.begin();
itr != _faces.end();
)
{
Face& face = *itr;
if ((face.plane.getNormal()*normal)>=0.0)
{
removedFaces.push_back(face);
itr = _faces.erase(itr);
}
else
{
++itr;
}
}
if (removedFaces.empty()) return;
typedef std::pair<osg::Vec3d, osg::Vec3d> Edge;
typedef std::map<Edge,int> Edges;
Edges edges;
double numVerticesAdded=0.0;
osg::Vec3d center;
for(itr = removedFaces.begin();
itr != removedFaces.end();
++itr)
{
Face& face = *itr;
Vertices& vertices = face.vertices;
for(unsigned int i=0; i<vertices.size(); ++i)
{
osg::Vec3d& a = vertices[i];
osg::Vec3d& b = vertices[ (i+1) % vertices.size()];
if (a<b) ++edges[Edge(a,b)];
else ++edges[Edge(b,a)];
center += a;
numVerticesAdded += 1.0;
}
}
if (numVerticesAdded==0.0) return;
center /= numVerticesAdded;
typedef std::set<osg::Vec3> VertexSet;
VertexSet uniqueVertices;
for(Edges::iterator eitr = edges.begin();
eitr != edges.end();
++eitr)
{
if (eitr->second==1)
{
// osg::notify(osg::NOTICE)<<" edge Ok"<<std::endl;
const Edge& edge = eitr->first;
double h_first = (edge.first-control) * normal;
osg::Vec3d projected_first = edge.first - normal * h_first;
double h_second = (edge.second-control) * normal;
osg::Vec3d projected_second = edge.second - normal * h_second;
Face face;
face.plane.set(projected_first, edge.first, edge.second);
face.vertices.push_back(projected_first);
face.vertices.push_back(projected_second);
face.vertices.push_back(edge.second);
face.vertices.push_back(edge.first);
if (face.plane.distance(center)<0.0) face.plane.flip();
_faces.push_back(face);
uniqueVertices.insert(projected_first);
uniqueVertices.insert(projected_second);
}
}
Face newFace;
newFace.plane.set(normal,control);
osg::Vec3d side = ( fabs(normal.x()) < fabs(normal.y()) ) ?
osg::Vec3(1.0, 0.0, 0.0) :
osg::Vec3(0.0, 1.0, 0.0);
osg::Vec3 v = normal ^ side;
v.normalize();
osg::Vec3 u = v ^ normal;
u.normalize();
typedef std::map<double, Vec3d> AnglePositions;
AnglePositions anglePositions;
for(VertexSet::iterator vitr = uniqueVertices.begin();
vitr != uniqueVertices.end();
++vitr)
{
osg::Vec3d delta = *vitr - center;
double angle = atan2(delta * u, delta * v);
if (angle<0.0) angle += 2.0*osg::PI;
anglePositions[angle] = *vitr;
}
for(AnglePositions::iterator aitr = anglePositions.begin();
aitr != anglePositions.end();
++aitr)
{
newFace.vertices.push_back(aitr->second);
}
_faces.push_back(newFace);
}
@ -521,7 +644,7 @@ public:
++itr)
{
Face& face = *itr;
geometry->addPrimitiveSet( new osg::DrawArrays(GL_LINE_STRIP, vertices->size(), face.vertices.size()) );
geometry->addPrimitiveSet( new osg::DrawArrays(GL_LINE_LOOP, vertices->size(), face.vertices.size()) );
for(Vertices::iterator vitr = face.vertices.begin();
vitr != face.vertices.end();
++vitr)
@ -1034,25 +1157,24 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
else
{
double minHeight = -1000.0;
overlayPolytope.projectDowntoBase(osg::Vec3d(0.0,0.0,1.0), _overlayBaseHeight);
overlayPolytope.projectDowntoBase(osg::Vec3d(0.0,0.0,_overlayBaseHeight), osg::Vec3d(0.0,0.0,1.0));
}
if (overlayData._geode.valid() && overlayData._geode->getNumDrawables()>500)
if (overlayData._geode.valid() && overlayData._geode->getNumDrawables()>0)
{
overlayData._geode->removeDrawables(0, 3);
}
if (overlayData._geode.valid())
{
//overlayData._geode->addDrawable(overlayPolytope.createDrawable(osg::Vec4d(1.0f,1.0f,0.0f,1.0f)));
//overlayData._geode->addDrawable(frustum.createDrawable(osg::Vec4d(0.0f,0.0f,1.0f,1.0f)));
overlayData._geode->addDrawable(overlayPolytope.createDrawable(osg::Vec4d(1.0f,1.0f,0.0f,1.0f)));
overlayData._geode->addDrawable(frustum.createDrawable(osg::Vec4d(0.0f,0.0f,1.0f,1.0f)));
}
CustomPolytope::Vertices corners;
overlayPolytope.cut(frustum);
//overlayPolytope.cut(frustum);
overlayPolytope.getPoints(corners);
if (overlayData._geode.valid())