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OpenSceneGraph/examples/osgterrain/ShaderTerrain.cpp

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#include <osgTerrain/Layer>
#include <osgTerrain/TerrainTile>
#include <osg/Texture1D>
#include <osg/Texture2D>
#include <osg/Program>
#include <osg/Uniform>
#include <osg/io_utils>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgDB/FileUtils>
#include "ShaderTerrain.h"
using namespace osgTerrain;
#if 0
#define LOCK(mutex) OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mutex);
#else
#define LOCK(mutex) /* OpenThreads::Thread::microSleep(1);*/
#endif
const osgTerrain::Locator* osgTerrain::computeMasterLocator(const osgTerrain::TerrainTile* tile)
{
const osgTerrain::Layer* elevationLayer = tile->getElevationLayer();
const osgTerrain::Layer* colorLayer = tile->getColorLayer(0);
const Locator* elevationLocator = elevationLayer ? elevationLayer->getLocator() : 0;
const Locator* colorLocator = colorLayer ? colorLayer->getLocator() : 0;
const Locator* masterLocator = elevationLocator ? elevationLocator : colorLocator;
if (!masterLocator)
{
OSG_NOTICE<<"Problem, no locator found in any of the terrain layers"<<std::endl;
return 0;
}
return masterLocator;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// GeometryPool
//
GeometryPool::~GeometryPool()
{
printf("GeometryPool::~GeometryPool()\n");
}
bool GeometryPool::createKeyForTile(TerrainTile* tile, GeometryKey& key)
{
const osgTerrain::Locator* masterLocator = computeMasterLocator(tile);
if (masterLocator)
{
const osg::Matrixd& matrix = masterLocator->getTransform();
osg::Vec3d bottom_left = osg::Vec3d(0.0,0.0,0.0) * matrix;
osg::Vec3d bottom_right = osg::Vec3d(1.0,0.0,0.0) * matrix;
osg::Vec3d top_left = osg::Vec3d(1.0,1.0,0.0) * matrix;
key.sx = static_cast<float>((bottom_right-bottom_left).length());
key.sy = static_cast<float>((top_left-bottom_left).length());
if (masterLocator->getCoordinateSystemType()==osgTerrain::Locator::GEOCENTRIC)
{
// need to differentiate between tiles based of latitude, so use y position of bottom left corner.
key.y = static_cast<float>(bottom_left.y());
}
else
{
// when the projection is linear there is no need to differentiate tiles according to their latitude
key.y = 0.0;
}
}
osgTerrain::HeightFieldLayer* layer = dynamic_cast<osgTerrain::HeightFieldLayer*>(tile->getElevationLayer());
if (layer)
{
osg::HeightField* hf = layer->getHeightField();
if (hf)
{
key.nx = hf->getNumColumns();
key.ny = hf->getNumRows();
}
}
return true;
}
static int numberGeometryCreated = 0;
static int numberSharedGeometry = 0;
osg::ref_ptr<osg::Geometry> GeometryPool::getOrCreateGeometry(osgTerrain::TerrainTile* tile)
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_geometryMapMutex);
GeometryKey key;
createKeyForTile(tile, key);
GeometryMap::iterator itr = _geometryMap.find(key);
if (itr != _geometryMap.end())
{
++numberSharedGeometry;
// OSG_NOTICE<<"Sharing geometry "<<itr->second.get()<<", number shared = "<<std::dec<<numberSharedGeometry<<", number created "<<numberGeometryCreated<<std::endl;
// OSG_NOTICE<<" GeometryKey "<<key.y<<", sx="<<key.sx<<", sy="<<key.sy<<", "<<key.nx<<", "<<key.ny<<std::endl;
return itr->second.get();
}
osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
_geometryMap[key] = geometry;
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
geometry->setVertexArray(vertices.get());
osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array;
geometry->setNormalArray(normals.get(), osg::Array::BIND_PER_VERTEX);
osg::ref_ptr<osg::Vec4Array> colours = new osg::Vec4Array;
geometry->setColorArray(colours.get(), osg::Array::BIND_OVERALL);
colours->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
osg::ref_ptr<osg::Vec4Array> texcoords = new osg::Vec4Array;
geometry->setTexCoordArray(0, texcoords.get(), osg::Array::BIND_PER_VERTEX);
int nx = key.nx;
int ny = key.nx;
int numVertices = nx * ny;
vertices->reserve(numVertices);
normals->reserve(numVertices);
texcoords->reserve(numVertices);
double c_mult = 1.0/static_cast<double>(nx-1);
double r_mult = 1.0/static_cast<double>(ny-1);
typedef std::vector<osg::Vec2d> LocationCoords;
LocationCoords locationCoords;
locationCoords.reserve(numVertices);
osg::Vec3d pos(0.0, 0.0, 0.0);
osg::Vec3d normal(0.0, 0.0, 1.0);
osg::Vec2 delta(1.0f/static_cast<float>(nx), 1.0f/static_cast<float>(ny));
// pass in the delta texcoord per texel via the color array
(*colours)[0].x() = c_mult;
(*colours)[0].y() = r_mult;
for(int r=0; r<ny; ++r)
{
pos.y () = static_cast<double>(r)*r_mult;
for(int c=0; c<nx; ++c)
{
pos.x() = static_cast<double>(c)*c_mult;
vertices->push_back(pos);
normals->push_back(normal);
texcoords->push_back(osg::Vec4(pos.x(), pos.y(), c_mult, r_mult));
locationCoords.push_back(osg::Vec2d(pos.x(), pos.y()));
}
}
bool smallTile = numVertices <= 16384;
osg::ref_ptr<osg::DrawElements> elements = smallTile ?
static_cast<osg::DrawElements*>(new osg::DrawElementsUShort(GL_QUADS)) :
static_cast<osg::DrawElements*>(new osg::DrawElementsUInt(GL_QUADS));
elements->reserveElements((nx-1) * (ny-1) * 4);
geometry->addPrimitiveSet(elements.get());
for(int r=0; r<ny-1; ++r)
{
for(int c=0; c<nx-1; ++c)
{
int i = c+r*nx;
elements->addElement(i);
elements->addElement(i+1);
elements->addElement(i+nx+1);
elements->addElement(i+nx);
}
}
osg::Matrixd matrix;
osg::Vec3d center(0.5, 0.5, 0.0);
osg::Vec3d bottom_left(0.0,0.0,0.0);
osg::Vec3d bottom_right(1.0,0.0,0.0);
osg::Vec3d top_left(0.0,1.0,0.0);
const osgTerrain::Locator* locator = computeMasterLocator(tile);
if (locator)
{
matrix = locator->getTransform();
center = center * matrix;
bottom_left = bottom_left * matrix;
bottom_right = bottom_right * matrix;
top_left = top_left * matrix;
// shift to center.x() to x=0 and carry all the corners with it.
bottom_left.x() -= center.x();
bottom_right.x() -= center.x();
top_left.x() -= center.x();
//center.x() = 0.0;
// OSG_NOTICE<<" in lat/longs : bottom_left = "<<bottom_left<<std::endl;
// OSG_NOTICE<<" in lat/longs : bottom_right = "<<bottom_right<<std::endl;
// OSG_NOTICE<<" in lat/longs : top_left = "<<top_left<<std::endl;
const osg::EllipsoidModel* em = locator->getEllipsoidModel();
if (em && locator->getCoordinateSystemType()==osgTerrain::Locator::GEOCENTRIC)
{
osg::Matrixd localToWorldTransform;
// note y axis maps to latitude, x axis to longitude
em->computeLocalToWorldTransformFromLatLongHeight(center.y(), center.x(), center.z(), localToWorldTransform);
// OSG_NOTICE<<"We have a EllipsoidModel to take account of "<<localToWorldTransform<<std::endl;
// note y axis maps to latitude, x axis to longitude
em->convertLatLongHeightToXYZ(center.y(), center.x(), center.z(), center.x(), center.y(),center.z());
em->convertLatLongHeightToXYZ(bottom_left.y(), bottom_left.x(), bottom_left.z(), bottom_left.x(), bottom_left.y(),bottom_left.z());
em->convertLatLongHeightToXYZ(bottom_right.y(), bottom_right.x(), bottom_right.z(), bottom_right.x(), bottom_right.y(),bottom_right.z());
em->convertLatLongHeightToXYZ(top_left.y(), top_left.x(), top_left.z(), top_left.x(), top_left.y(),top_left.z());
osg::Matrixd worldToLocalTransform;
worldToLocalTransform.invert(localToWorldTransform);
center = center * worldToLocalTransform;
bottom_left = bottom_left * worldToLocalTransform;
bottom_right = bottom_right * worldToLocalTransform;
top_left = top_left * worldToLocalTransform;
for(int i=0; i<numVertices; ++i)
{
const osg::Vec2d& location = locationCoords[i];
osg::Vec3d pos = osg::Vec3d(location.x(), location.y(), 0.0) * matrix;
em->convertLatLongHeightToXYZ(pos.y(), pos.x(), 0.0, pos.x(), pos.y(),pos.z());
osg::Vec4& tc = (*texcoords)[i];
osg::Vec3d pos_right = osg::Vec3d(location.x()+static_cast<double>(tc[2]), location.y(), 0.0) * matrix;
em->convertLatLongHeightToXYZ(pos_right.y(), pos_right.x(), 0.0, pos_right.x(), pos_right.y(),pos_right.z());
osg::Vec3d pos_up = osg::Vec3d(location.x(), location.y()+static_cast<double>(tc[3]), 0.0) * matrix;
em->convertLatLongHeightToXYZ(pos_up.y(), pos_up.x(), 0.0, pos_up.x(), pos_up.y(),pos_up.z());
double length_right = (pos_right-pos).length();
double length_up = (pos_up-pos).length();
tc[2] = 1.0/length_right;
tc[3] = 1.0/length_up;
osg::Vec3d normal(pos);
normal = osg::Matrixd::transform3x3(localToWorldTransform, normal);
normal.normalize();
pos = pos * worldToLocalTransform;
pos -= center;
(*vertices)[i] = pos;
(*normals)[i] = normal;
}
}
}
// double tileWidth = (bottom_right-bottom_left).length();
// double skirtHeight = tileWidth*0.05;
// OSG_NOTICE<<" in local coords : center = "<<center<<std::endl;
// OSG_NOTICE<<" in local coords : bottom_left = "<<bottom_left<<std::endl;
// OSG_NOTICE<<" in local coords : bottom_right = "<<bottom_right<<std::endl;
// OSG_NOTICE<<" in local coords : top_left = "<<top_left<<std::endl;
// OSG_NOTICE<<" skirtHeight = "<<skirtHeight<<std::endl;
//osgDB::writeNodeFile(*geometry, "geometry.osgt");
++ numberGeometryCreated;
// OSG_NOTICE<<"Creating new geometry "<<geometry.get()<<std::endl;
return geometry;
}
osg::ref_ptr<osg::MatrixTransform> GeometryPool::getTileSubgraph(osgTerrain::TerrainTile* tile)
{
// create or reuse Geometry
osg::ref_ptr<osg::Geometry> geometry = getOrCreateGeometry(tile);
osg::ref_ptr<HeightFieldDrawable> hfDrawable = new HeightFieldDrawable();
osgTerrain::HeightFieldLayer* hfl = dynamic_cast<osgTerrain::HeightFieldLayer*>(tile->getElevationLayer());
osg::HeightField* hf = hfl ? hfl->getHeightField() : 0;
hfDrawable->setHeightField(hf);
hfDrawable->setGeometry(geometry.get());
// create a transform to place the geometry in the appropriate place
osg::ref_ptr<osg::MatrixTransform> transform = new osg::MatrixTransform;
// transform->addChild(geometry.get());
transform->addChild(hfDrawable.get());
const osgTerrain::Locator* locator = computeMasterLocator(tile);
if (locator)
{
osg::Matrixd matrix = locator->getTransform();
osg::Vec3d center = osg::Vec3d(0.5, 0.5, 0.0) * matrix;
// shift to center.x() to x=0 and carry all the corners with it.
const osg::EllipsoidModel* em = locator->getEllipsoidModel();
if (em && locator->getCoordinateSystemType()==osgTerrain::Locator::GEOCENTRIC)
{
osg::Matrixd localToWorldTransform;
// note y axis maps to latitude, x axis to longitude
em->computeLocalToWorldTransformFromLatLongHeight(center.y(), center.x(), center.z(), localToWorldTransform);
// OSG_NOTICE<<"We have a EllipsoidModel to take account of "<<localToWorldTransform<<std::endl;
transform->setMatrix(localToWorldTransform);
//osgDB::writeNodeFile(*transform, "subgraph.osgt");
}
else
{
transform->setMatrix(locator->getTransform());
}
}
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray());
osg::Vec3Array* normals = dynamic_cast<osg::Vec3Array*>(geometry->getNormalArray());
if (hf && vertices && normals && (vertices->size()==normals->size()))
{
unsigned int nr = hf->getNumRows();
unsigned int nc = hf->getNumColumns();
osg::BoundingBox bb;
osg::FloatArray* heights = hf->getFloatArray();
for(unsigned int r=0; r<nr; ++r)
{
for(unsigned int c=0; c<nc; ++c)
{
unsigned int i = r*nc+c;
float h = (*heights)[i];
const osg::Vec3& v = (*vertices)[i];
const osg::Vec3& n = (*normals)[i];
const osg::Vec3 vt(v+n*h);
bb.expandBy(vt);
}
}
hfDrawable->setInitialBound(bb);
// OSG_NOTICE<<"Assigning initial bound ("<<bb.xMin()<<", "<<bb.xMax()<<") , ("<<bb.yMin()<<", "<<bb.yMax()<<") ("<<bb.zMin()<<", "<<bb.zMax()<<")"<< std::endl;
// bb = hfDrawable->getBoundingBox();
//OSG_NOTICE<<" getBoundingBox ("<<bb.xMin()<<", "<<bb.xMax()<<") , ("<<bb.yMin()<<", "<<bb.yMax()<<") ("<<bb.zMin()<<", "<<bb.zMax()<<")"<< std::endl;
}
osg::ref_ptr<osg::StateSet> stateset = transform->getOrCreateStateSet();
// apply colour layers
applyLayers(tile, stateset.get());
return transform;
}
osg::ref_ptr<osg::Program> GeometryPool::getOrCreateProgram(LayerTypes& layerTypes)
{
#if 0
OSG_NOTICE<<"getOrCreateProgram(";
for(LayerTypes::iterator itr = layerTypes.begin();
itr != layerTypes.end();
++itr)
{
if (itr!= layerTypes.begin()) OSG_NOTICE<<", ";
switch(*itr)
{
case(HEIGHTFIELD_LAYER): OSG_NOTICE<<"HeightField"; break;
case(COLOR_LAYER): OSG_NOTICE<<"Colour"; break;
case(CONTOUR_LAYER): OSG_NOTICE<<"Contour"; break;
}
}
#endif
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_programMapMutex);
ProgramMap::iterator itr = _programMap.find(layerTypes);
if (itr!=_programMap.end())
{
// OSG_NOTICE<<") returning exisitng Program "<<itr->second.get()<<std::endl;
return itr->second.get();
}
osg::ref_ptr<osg::Program> program = new osg::Program;
_programMap[layerTypes] = program;
// OSG_NOTICE<<") creating new Program "<<program.get()<<std::endl;
osg::ref_ptr<osg::Shader> vertex_shader = osgDB::readShaderFile("shaders/terrain.vert");
program->addShader(vertex_shader.get());
osg::ref_ptr<osg::Shader> fragment_shader = osgDB::readShaderFile("shaders/terrain.frag");
program->addShader(fragment_shader.get());
return program;
}
void GeometryPool::applyLayers(osgTerrain::TerrainTile* tile, osg::StateSet* stateset)
{
typedef std::map<osgTerrain::Layer*, osg::Texture*> LayerToTextureMap;
LayerToTextureMap layerToTextureMap;
// OSG_NOTICE<<"tile->getNumColorLayers() = "<<tile->getNumColorLayers()<<std::endl;
LayerTypes layerTypes;
osgTerrain::HeightFieldLayer* hfl = dynamic_cast<osgTerrain::HeightFieldLayer*>(tile->getElevationLayer());
if (hfl)
{
osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(layerToTextureMap[hfl]);
if (!texture2D)
{
texture2D = new osg::Texture2D;
osg::ref_ptr<osg::Image> image = new osg::Image;
const void* dataPtr = hfl->getHeightField()->getFloatArray()->getDataPointer();
image->setImage(hfl->getNumRows(), hfl->getNumColumns(), 1,
GL_LUMINANCE32F_ARB,
GL_LUMINANCE, GL_FLOAT,
reinterpret_cast<unsigned char*>(const_cast<void*>(dataPtr)),
osg::Image::NO_DELETE);
texture2D->setImage(image.get());
texture2D->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::NEAREST);
texture2D->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::NEAREST);
texture2D->setWrap(osg::Texture::WRAP_S,osg::Texture::CLAMP);
texture2D->setWrap(osg::Texture::WRAP_T,osg::Texture::CLAMP);
texture2D->setBorderColor(osg::Vec4d(0.0,0.0,0.0,0.0));
texture2D->setResizeNonPowerOfTwoHint(false);
layerToTextureMap[hfl] = texture2D;
}
int textureUnit = layerTypes.size();
stateset->setTextureAttributeAndModes(textureUnit, texture2D, osg::StateAttribute::ON);
stateset->addUniform(new osg::Uniform("terrainTexture",textureUnit));
layerTypes.push_back(HEIGHTFIELD_LAYER);
}
#if 1
for(unsigned int layerNum=0; layerNum<tile->getNumColorLayers(); ++layerNum)
{
osgTerrain::Layer* colorLayer = tile->getColorLayer(layerNum);
if (!colorLayer) continue;
osgTerrain::SwitchLayer* switchLayer = dynamic_cast<osgTerrain::SwitchLayer*>(colorLayer);
if (switchLayer)
{
if (switchLayer->getActiveLayer()<0 ||
static_cast<unsigned int>(switchLayer->getActiveLayer())>=switchLayer->getNumLayers())
{
continue;
}
colorLayer = switchLayer->getLayer(switchLayer->getActiveLayer());
if (!colorLayer) continue;
}
osg::Image* image = colorLayer->getImage();
if (!image) continue;
osgTerrain::ImageLayer* imageLayer = dynamic_cast<osgTerrain::ImageLayer*>(colorLayer);
osgTerrain::ContourLayer* contourLayer = dynamic_cast<osgTerrain::ContourLayer*>(colorLayer);
if (imageLayer)
{
osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(layerToTextureMap[colorLayer]);
if (!texture2D)
{
texture2D = new osg::Texture2D;
texture2D->setImage(image);
texture2D->setMaxAnisotropy(16.0f);
texture2D->setResizeNonPowerOfTwoHint(false);
texture2D->setFilter(osg::Texture::MIN_FILTER, colorLayer->getMinFilter());
texture2D->setFilter(osg::Texture::MAG_FILTER, colorLayer->getMagFilter());
texture2D->setWrap(osg::Texture::WRAP_S,osg::Texture::CLAMP_TO_EDGE);
texture2D->setWrap(osg::Texture::WRAP_T,osg::Texture::CLAMP_TO_EDGE);
bool mipMapping = !(texture2D->getFilter(osg::Texture::MIN_FILTER)==osg::Texture::LINEAR || texture2D->getFilter(osg::Texture::MIN_FILTER)==osg::Texture::NEAREST);
bool s_NotPowerOfTwo = image->s()==0 || (image->s() & (image->s() - 1));
bool t_NotPowerOfTwo = image->t()==0 || (image->t() & (image->t() - 1));
if (mipMapping && (s_NotPowerOfTwo || t_NotPowerOfTwo))
{
OSG_INFO<<"Disabling mipmapping for non power of two tile size("<<image->s()<<", "<<image->t()<<")"<<std::endl;
texture2D->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
}
layerToTextureMap[colorLayer] = texture2D;
// OSG_NOTICE<<"Creating new ImageLayer texture "<<layerNum<<" image->s()="<<image->s()<<" image->t()="<<image->t()<<std::endl;
}
else
{
// OSG_NOTICE<<"Reusing ImageLayer texture "<<layerNum<<std::endl;
}
int textureUnit = layerTypes.size();
stateset->setTextureAttributeAndModes(textureUnit, texture2D, osg::StateAttribute::ON);
std::stringstream str;
str<<"colorTexture"<<textureUnit;
stateset->addUniform(new osg::Uniform(str.str().c_str(),textureUnit));
layerTypes.push_back(COLOR_LAYER);
}
else if (contourLayer)
{
osg::Texture1D* texture1D = dynamic_cast<osg::Texture1D*>(layerToTextureMap[colorLayer]);
if (!texture1D)
{
texture1D = new osg::Texture1D;
texture1D->setImage(image);
texture1D->setResizeNonPowerOfTwoHint(false);
texture1D->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
texture1D->setFilter(osg::Texture::MAG_FILTER, colorLayer->getMagFilter());
layerToTextureMap[colorLayer] = texture1D;
}
int textureUnit = layerTypes.size();
stateset->setTextureAttributeAndModes(textureUnit, texture1D, osg::StateAttribute::ON);
std::stringstream str;
str<<"contourTexture"<<textureUnit;
stateset->addUniform(new osg::Uniform(str.str().c_str(),textureUnit));
layerTypes.push_back(CONTOUR_LAYER);
}
}
#endif
osg::ref_ptr<osg::Program> program = getOrCreateProgram(layerTypes);
if (program.valid())
{
stateset->setAttribute(program.get());
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// HeightFieldDrawable
//
HeightFieldDrawable::HeightFieldDrawable()
{
setSupportsDisplayList(false);
}
HeightFieldDrawable::HeightFieldDrawable(const HeightFieldDrawable& rhs,const osg::CopyOp& copyop):
osg::Drawable(rhs, copyop),
_heightField(rhs._heightField),
_geometry(rhs._geometry)
{
setSupportsDisplayList(false);
}
void HeightFieldDrawable::drawImplementation(osg::RenderInfo& renderInfo) const
{
if (_geometry.valid()) _geometry->draw(renderInfo);
}
void HeightFieldDrawable::compileGLObjects(osg::RenderInfo& renderInfo) const
{
if (_geometry.valid()) _geometry->compileGLObjects(renderInfo);
}
void HeightFieldDrawable::resizeGLObjectBuffers(unsigned int maxSize)
{
if (_geometry.valid()) _geometry->resizeGLObjectBuffers(maxSize);
}
void HeightFieldDrawable::releaseGLObjects(osg::State* state) const
{
if (_geometry.valid()) _geometry->releaseGLObjects(state);
}
void HeightFieldDrawable::accept(osg::Drawable::AttributeFunctor& af)
{
if (_geometry) _geometry->accept(af);
}
void HeightFieldDrawable::accept(osg::Drawable::ConstAttributeFunctor& caf) const
{
if (_geometry) _geometry->accept(caf);
}
void HeightFieldDrawable::accept(osg::PrimitiveFunctor& pf) const
{
if (_geometry) _geometry->accept(pf);
}
void HeightFieldDrawable::accept(osg::PrimitiveIndexFunctor& pif) const
{
if (_geometry) _geometry->accept(pif);
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// ShaderTerrain
//
ShaderTerrain::ShaderTerrain()
{
// OSG_NOTICE<<"ShaderTerrain::ShaderTerrain()"<<std::endl;
_geometryPool = new GeometryPool;
}
ShaderTerrain::ShaderTerrain(const ShaderTerrain& st,const osg::CopyOp& copyop):
osgTerrain::TerrainTechnique(st, copyop),
_geometryPool(st._geometryPool)
{
// OSG_NOTICE<<"ShaderTerrain::ShaderTerrain(ShaderTerrain&, CopyOp&) "<<_geometryPool.get()<<std::endl;
}
ShaderTerrain::~ShaderTerrain()
{
}
void ShaderTerrain::init(int dirtyMask, bool assumeMultiThreaded)
{
if (!_terrainTile) return;
LOCK(_transformMutex);
++_currentTraversalCount;
#if 0
if (_currentTraversalCount>1)
{
unsigned int val = _currentTraversalCount;
printf("Has a concurrent traversal %i\n",val);
//throw "have concurrent traversal happening";
OpenThreads::Thread::YieldCurrentThread();
}
else
{
printf("Single threaded traversal\n");
}
#endif
//OSG_NOTICE<<"ShaderTerrain::init("<<dirtyMask<<", "<<assumeMultiThreaded<<")"<<std::endl;
_transform = _geometryPool->getTileSubgraph(_terrainTile);
// set tile as no longer dirty.
_terrainTile->setDirtyMask(0);
--_currentTraversalCount;
}
void ShaderTerrain::update(osgUtil::UpdateVisitor* uv)
{
LOCK(_transformMutex);
if (_terrainTile) _terrainTile->osg::Group::traverse(*uv);
if (_transform.valid()) _transform->accept(*uv);
}
void ShaderTerrain::cull(osgUtil::CullVisitor* cv)
{
LOCK(_transformMutex);
if (_transform.valid()) _transform->accept(*cv);
}
void ShaderTerrain::traverse(osg::NodeVisitor& nv)
{
if (!_terrainTile) return;
// if app traversal update the frame count.
if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR)
{
// if (_terrainTile->getDirty()) _terrainTile->init(_terrainTile->getDirtyMask(), false);
osgUtil::UpdateVisitor* uv = dynamic_cast<osgUtil::UpdateVisitor*>(&nv);
if (uv)
{
update(uv);
return;
}
}
else if (nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR)
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv);
if (cv)
{
cull(cv);
return;
}
}
{
LOCK(_transformMutex);
if (_transform.valid())
{
_transform->accept(nv);
}
}
}
void ShaderTerrain::cleanSceneGraph()
{
}
void ShaderTerrain::releaseGLObjects(osg::State* state) const
{
// LOCK(_transformMutex);
if (_transform.valid())
{
// OSG_NOTICE<<"ShaderTerrain::releaseGLObjects()"<<std::endl;
_transform->releaseGLObjects(state);
}
}
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