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Added extra SphereSegment intersection tests.

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This commit is contained in:
Robert Osfield
2006-06-05 16:25:01 +00:00
parent 947904ee85
commit 5670ce8c0a
1 changed files with 97 additions and 59 deletions
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156
examples/osgspheresegment/osgspheresegment.cpp
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@@ -22,6 +22,8 @@
#include <osgParticle/FireEffect>
#include <osgParticle/ParticleSystemUpdater>
#include <osg/io_utils>
// for the grid data..
#include "../osghangglide/terrain_coords.h"
@@ -89,8 +91,6 @@ class IntersectionUpdateCallback : public osg::NodeCallback
osgSim::SphereSegment::LineList lines = ss_->computeIntersection(possie, terrain_.get());
if (!lines.empty())
{
osg::notify(osg::NOTICE)<<"We've found intersections!!!!"<<std::endl;
if (intersectionGroup_.valid())
{
// now we need to place the intersections which are in the SphereSegmenet's coordinate frame into
@@ -98,6 +98,8 @@ class IntersectionUpdateCallback : public osg::NodeCallback
osg::MatrixTransform* mt = new osg::MatrixTransform;
mt->setMatrix(osg::computeLocalToWorld(nv->getNodePath()));
intersectionGroup_->addChild(mt);
// std::cout<<"matrix = "<<mt->getMatrix()<<std::endl;
osg::Geode* geode = new osg::Geode;
mt->addChild(geode);
@@ -135,7 +137,7 @@ class IntersectionUpdateCallback : public osg::NodeCallback
};
osg::Node* createMovingModel(const osg::Vec3& center, float radius, osg::Geode * terrainGeode, osg::Group * root)
osg::Node* createMovingModel(const osg::Vec3& center, float radius, osg::Geode * terrainGeode, osg::Group * root, bool createMovingRadar = false)
{
float animationLength = 10.0f;
@@ -163,7 +165,8 @@ osg::Node* createMovingModel(const osg::Vec3& center, float radius, osg::Geode *
xform->addChild(positioned);
model->addChild(xform);
}
if (1)
if (createMovingRadar)
{
// The IntersectionUpdateCallback has to have a safe place to put all its generated geometry into,
// and this group can't be in the parental chain of the callback otherwise we will end up invalidating
@@ -178,8 +181,8 @@ osg::Node* createMovingModel(const osg::Vec3& center, float radius, osg::Geode *
700.0f, // radius
osg::DegreesToRadians(135.0f),
osg::DegreesToRadians(240.0f),
osg::DegreesToRadians(-90.0f),
osg::DegreesToRadians(-70.0f),
osg::DegreesToRadians(-60.0f),
osg::DegreesToRadians(-40.0f),
60);
IntersectionUpdateCallback * iuc = new IntersectionUpdateCallback;
@@ -427,6 +430,8 @@ void build_world(osg::Group *root, unsigned int testCase)
osg::ref_ptr<osgSim::SphereSegment> ss = 0;
{
osg::Matrix terrainToSS;
switch(testCase)
{
case(0):
@@ -438,6 +443,7 @@ void build_world(osg::Group *root, unsigned int testCase)
osg::DegreesToRadians(-10.0f),
osg::DegreesToRadians(30.0f),
60);
root->addChild(ss.get());
break;
case(1):
ss = new osgSim::SphereSegment(
@@ -448,6 +454,7 @@ void build_world(osg::Group *root, unsigned int testCase)
osg::DegreesToRadians(-10.0f),
osg::DegreesToRadians(30.0f),
60);
root->addChild(ss.get());
break;
case(2):
ss = new osgSim::SphereSegment(
@@ -458,6 +465,7 @@ void build_world(osg::Group *root, unsigned int testCase)
osg::DegreesToRadians(-10.0f),
osg::DegreesToRadians(30.0f),
60);
root->addChild(ss.get());
break;
case(3):
ss = new osgSim::SphereSegment(
@@ -468,67 +476,94 @@ void build_world(osg::Group *root, unsigned int testCase)
osg::DegreesToRadians(-10.0f),
osg::DegreesToRadians(30.0f),
60);
root->addChild(ss.get());
break;
case(4):
{
ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
700.0f, // radius
osg::DegreesToRadians(135.0f),
osg::DegreesToRadians(240.0f),
osg::DegreesToRadians(-60.0f),
osg::DegreesToRadians(-40.0f),
60);
osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
mt->setMatrix(osg::Matrix(-0.851781, 0.156428, -0.5, 0,
-0.180627, -0.983552, -6.93889e-18, 0,
-0.491776, 0.0903136, 0.866025, 0,
598.217, 481.957, 100, 1));
mt->addChild(ss.get());
terrainToSS.invert(mt->getMatrix());
root->addChild(mt.get());
break;
}
case(5):
{
ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
700.0f, // radius
osg::DegreesToRadians(35.0f),
osg::DegreesToRadians(135.0f),
osg::DegreesToRadians(-60.0f),
osg::DegreesToRadians(-40.0f),
60);
osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
mt->setMatrix(osg::Matrix(-0.851781, 0.156428, -0.5, 0,
-0.180627, -0.983552, -6.93889e-18, 0,
-0.491776, 0.0903136, 0.866025, 0,
598.217, 481.957, 100, 1));
mt->addChild(ss.get());
terrainToSS.invert(mt->getMatrix());
root->addChild(mt.get());
break;
}
case(6):
{
ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
700.0f, // radius
osg::DegreesToRadians(-45.0f),
osg::DegreesToRadians(45.0f),
osg::DegreesToRadians(-60.0f),
osg::DegreesToRadians(-40.0f),
60);
osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
mt->setMatrix(osg::Matrix(-0.851781, 0.156428, -0.5, 0,
-0.180627, -0.983552, -6.93889e-18, 0,
-0.491776, 0.0903136, 0.866025, 0,
598.217, 481.957, 100, 1));
mt->addChild(ss.get());
terrainToSS.invert(mt->getMatrix());
root->addChild(mt.get());
break;
}
};
ss->setAllColors(osg::Vec4(1.0f,1.0f,1.0f,0.5f));
ss->setSideColor(osg::Vec4(0.0f,1.0f,1.0f,0.1f));
#if 1
root->addChild(ss.get());
#endif
}
#if 1
root->addChild(ss->computeIntersectionSubgraph(osg::Matrixd::identity(), terrainGeode.get()));
#else
osgSim::SphereSegment::LineList lines = ss->computeIntersection(osg::Matrixd::identity(), terrainGeode.get());
if (!lines.empty())
{
osg::notify(osg::NOTICE)<<"We've found intersections!!!!"<<std::endl;
osg::Geode* geode = new osg::Geode;
root->addChild(geode);
geode->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
for(osgSim::SphereSegment::LineList::iterator itr=lines.begin();
itr!=lines.end();
++itr)
if (ss.valid())
{
osg::Geometry* geom = new osg::Geometry;
geode->addDrawable(geom);
osg::Vec3Array* vertices = itr->get();
geom->setVertexArray(vertices);
geom->addPrimitiveSet(new osg::DrawArrays(GL_LINE_STRIP, 0, vertices->getNumElements()));
ss->setAllColors(osg::Vec4(1.0f,1.0f,1.0f,0.5f));
ss->setSideColor(osg::Vec4(0.0f,1.0f,1.0f,0.1f));
if (!ss->getParents().empty())
{
ss->getParent(0)->addChild(ss->computeIntersectionSubgraph(terrainToSS, terrainGeode.get()));
}
}
}
else
{
osg::notify(osg::NOTICE)<<"No intersections found"<<std::endl;
}
#endif
#if 0
osgSim::OverlayNode* overlayNode = new osgSim::OverlayNode;
overlayNode->getOrCreateStateSet()->setTextureAttribute(1, new osg::TexEnv(osg::TexEnv::DECAL));
const osg::BoundingSphere& bs = terrainGeode->getBound();
osg::Group* overlaySubgraph = createOverlay(bs.center(), bs.radius()*0.5f);
overlaySubgraph->addChild(ss.get());
overlayNode->setOverlaySubgraph(overlaySubgraph);
overlayNode->setOverlayTextureSizeHint(2048);
overlayNode->addChild(terrainGeode.get());
root->addChild(overlayNode);
#else
root->addChild(terrainGeode.get());
#endif
// create particle effects
{
@@ -556,9 +591,12 @@ void build_world(osg::Group *root, unsigned int testCase)
root->addChild(fire);
}
bool createMovingRadar = true;
// create the moving models.
{
root->addChild(createMovingModel(osg::Vec3(500.0f,500.0f,500.0f),100.0f, terrainGeode.get(), root));
root->addChild(createMovingModel(osg::Vec3(500.0f,500.0f,500.0f),100.0f, terrainGeode.get(), root, createMovingRadar));
}
}