osg::ref_ptr<osg::Node> TerrainGrid::buildTerrain (osg::Group* parent, float chunkSize, const osg::Vec2f& chunkCenter)
{
if (chunkSize * mNumSplits > 1.f)
{
// keep splitting
osg::ref_ptr<osg::Group> group (new osg::Group);
if (parent)
parent->addChild(group);
float newChunkSize = chunkSize/2.f;
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(newChunkSize/2.f, newChunkSize/2.f));
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(newChunkSize/2.f, -newChunkSize/2.f));
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(-newChunkSize/2.f, newChunkSize/2.f));
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(-newChunkSize/2.f, -newChunkSize/2.f));
return group;
}
else
{
float minH, maxH;
if (!mStorage->getMinMaxHeights(chunkSize, chunkCenter, minH, maxH))
return NULL; // no terrain defined
osg::Vec2f worldCenter = chunkCenter*mStorage->getCellWorldSize();
osg::ref_ptr<SceneUtil::PositionAttitudeTransform> transform (new SceneUtil::PositionAttitudeTransform);
transform->setPosition(osg::Vec3f(worldCenter.x(), worldCenter.y(), 0.f));
if (parent)
parent->addChild(transform);
osg::ref_ptr<osg::Vec3Array> positions (new osg::Vec3Array);
osg::ref_ptr<osg::Vec3Array> normals (new osg::Vec3Array);
osg::ref_ptr<osg::Vec4Array> colors (new osg::Vec4Array);
osg::ref_ptr<osg::VertexBufferObject> vbo (new osg::VertexBufferObject);
positions->setVertexBufferObject(vbo);
normals->setVertexBufferObject(vbo);
colors->setVertexBufferObject(vbo);
mStorage->fillVertexBuffers(0, chunkSize, chunkCenter, positions, normals, colors);
osg::ref_ptr<osg::Geometry> geometry (new osg::Geometry);
geometry->setVertexArray(positions);
geometry->setNormalArray(normals, osg::Array::BIND_PER_VERTEX);
geometry->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
geometry->setUseDisplayList(false);
geometry->setUseVertexBufferObjects(true);
geometry->addPrimitiveSet(mCache.getIndexBuffer(0));
// we already know the bounding box, so no need to let OSG compute it.
osg::Vec3f min(-0.5f*mStorage->getCellWorldSize()*chunkSize,
-0.5f*mStorage->getCellWorldSize()*chunkSize,
minH);
osg::Vec3f max (0.5f*mStorage->getCellWorldSize()*chunkSize,
0.5f*mStorage->getCellWorldSize()*chunkSize,
maxH);
osg::BoundingBox bounds(min, max);
geometry->setComputeBoundingBoxCallback(new StaticBoundingBoxCallback(bounds));
std::vector<LayerInfo> layerList;
std::vector<osg::ref_ptr<osg::Image> > blendmaps;
mStorage->getBlendmaps(chunkSize, chunkCenter, false, blendmaps, layerList);
// For compiling textures, I don't think the osgFX::Effect does it correctly
osg::ref_ptr<osg::Node> textureCompileDummy (new osg::Node);
unsigned int dummyTextureCounter = 0;
bool useShaders = mResourceSystem->getSceneManager()->getForceShaders();
if (!mResourceSystem->getSceneManager()->getClampLighting())
useShaders = true; // always use shaders when lighting is unclamped, this is to avoid lighting seams between a terrain chunk with normal maps and one without normal maps
std::vector<TextureLayer> layers;
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mTextureCacheMutex);
for (std::vector<LayerInfo>::const_iterator it = layerList.begin(); it != layerList.end(); ++it)
{
TextureLayer textureLayer;
textureLayer.mSpecular = it->mSpecular;
osg::ref_ptr<osg::Texture2D> texture = mTextureCache[it->mDiffuseMap];
if (!texture)
{
texture = new osg::Texture2D(mResourceSystem->getImageManager()->getImage(it->mDiffuseMap));
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
mResourceSystem->getSceneManager()->applyFilterSettings(texture);
mTextureCache[it->mDiffuseMap] = texture;
}
textureLayer.mDiffuseMap = texture;
textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(dummyTextureCounter++, texture);
if (!it->mNormalMap.empty())
{
texture = mTextureCache[it->mNormalMap];
if (!texture)
{
texture = new osg::Texture2D(mResourceSystem->getImageManager()->getImage(it->mNormalMap));
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
mResourceSystem->getSceneManager()->applyFilterSettings(texture);
mTextureCache[it->mNormalMap] = texture;
}
textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(dummyTextureCounter++, texture);
textureLayer.mNormalMap = texture;
}
if (it->requiresShaders())
useShaders = true;
layers.push_back(textureLayer);
}
}
std::vector<osg::ref_ptr<osg::Texture2D> > blendmapTextures;
for (std::vector<osg::ref_ptr<osg::Image> >::const_iterator it = blendmaps.begin(); it != blendmaps.end(); ++it)
{
osg::ref_ptr<osg::Texture2D> texture (new osg::Texture2D);
texture->setImage(*it);
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
texture->setResizeNonPowerOfTwoHint(false);
blendmapTextures.push_back(texture);
textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(dummyTextureCounter++, blendmapTextures.back());
}
// use texture coordinates for both texture units, the layer texture and blend texture
for (unsigned int i=0; i<2; ++i)
geometry->setTexCoordArray(i, mCache.getUVBuffer());
float blendmapScale = ESM::Land::LAND_TEXTURE_SIZE*chunkSize;
osg::ref_ptr<osgFX::Effect> effect (new Terrain::Effect(mShaderManager ? useShaders : false, mResourceSystem->getSceneManager()->getForcePerPixelLighting(), mResourceSystem->getSceneManager()->getClampLighting(),
mShaderManager, layers, blendmapTextures, blendmapScale, blendmapScale));
effect->addCullCallback(new SceneUtil::LightListCallback);
transform->addChild(effect);
osg::Node* toAttach = geometry.get();
effect->addChild(toAttach);
if (mIncrementalCompileOperation)
{
mIncrementalCompileOperation->add(toAttach);
mIncrementalCompileOperation->add(textureCompileDummy);
}
return transform;
}
}
osg::ref_ptr<osg::Node> TerrainGrid::buildTerrain (osg::Group* parent, float chunkSize, const osg::Vec2f& chunkCenter)
{
if (chunkSize * mNumSplits > 1.f)
{
// keep splitting
osg::ref_ptr<osg::Group> group (new osg::Group);
if (parent)
parent->addChild(group);
float newChunkSize = chunkSize/2.f;
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(newChunkSize/2.f, newChunkSize/2.f));
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(newChunkSize/2.f, -newChunkSize/2.f));
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(-newChunkSize/2.f, newChunkSize/2.f));
buildTerrain(group, newChunkSize, chunkCenter + osg::Vec2f(-newChunkSize/2.f, -newChunkSize/2.f));
return group;
}
else
{
float minH, maxH;
if (!mStorage->getMinMaxHeights(chunkSize, chunkCenter, minH, maxH))
return NULL; // no terrain defined
osg::Vec2f worldCenter = chunkCenter*mStorage->getCellWorldSize();
osg::ref_ptr<SceneUtil::PositionAttitudeTransform> transform (new SceneUtil::PositionAttitudeTransform);
transform->setPosition(osg::Vec3f(worldCenter.x(), worldCenter.y(), 0.f));
if (parent)
parent->addChild(transform);
osg::ref_ptr<osg::Vec3Array> positions (new osg::Vec3Array);
osg::ref_ptr<osg::Vec3Array> normals (new osg::Vec3Array);
osg::ref_ptr<osg::Vec4Array> colors (new osg::Vec4Array);
osg::ref_ptr<osg::VertexBufferObject> vbo (new osg::VertexBufferObject);
positions->setVertexBufferObject(vbo);
normals->setVertexBufferObject(vbo);
colors->setVertexBufferObject(vbo);
mStorage->fillVertexBuffers(0, chunkSize, chunkCenter, positions, normals, colors);
osg::ref_ptr<osg::Geometry> geometry (new osg::Geometry);
geometry->setVertexArray(positions);
geometry->setNormalArray(normals, osg::Array::BIND_PER_VERTEX);
geometry->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
geometry->setUseDisplayList(false);
geometry->setUseVertexBufferObjects(true);
geometry->addPrimitiveSet(mCache.getIndexBuffer(0));
// we already know the bounding box, so no need to let OSG compute it.
osg::Vec3f min(-0.5f*mStorage->getCellWorldSize()*chunkSize,
-0.5f*mStorage->getCellWorldSize()*chunkSize,
minH);
osg::Vec3f max (0.5f*mStorage->getCellWorldSize()*chunkSize,
0.5f*mStorage->getCellWorldSize()*chunkSize,
maxH);
osg::BoundingBox bounds(min, max);
geometry->setComputeBoundingBoxCallback(new StaticBoundingBoxCallback(bounds));
std::vector<LayerInfo> layerList;
std::vector<osg::ref_ptr<osg::Image> > blendmaps;
mStorage->getBlendmaps(chunkSize, chunkCenter, false, blendmaps, layerList);
// For compiling textures, I don't think the osgFX::Effect does it correctly
osg::ref_ptr<osg::Node> textureCompileDummy (new osg::Node);
std::vector<osg::ref_ptr<osg::Texture2D> > layerTextures;
for (std::vector<LayerInfo>::const_iterator it = layerList.begin(); it != layerList.end(); ++it)
{
layerTextures.push_back(mResourceSystem->getTextureManager()->getTexture2D(it->mDiffuseMap, osg::Texture::REPEAT, osg::Texture::REPEAT));
textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(0, layerTextures.back());
}
std::vector<osg::ref_ptr<osg::Texture2D> > blendmapTextures;
for (std::vector<osg::ref_ptr<osg::Image> >::const_iterator it = blendmaps.begin(); it != blendmaps.end(); ++it)
{
osg::ref_ptr<osg::Texture2D> texture (new osg::Texture2D);
texture->setImage(*it);
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
texture->setResizeNonPowerOfTwoHint(false);
blendmapTextures.push_back(texture);
textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(0, layerTextures.back());
}
// use texture coordinates for both texture units, the layer texture and blend texture
for (unsigned int i=0; i<2; ++i)
geometry->setTexCoordArray(i, mCache.getUVBuffer());
float blendmapScale = ESM::Land::LAND_TEXTURE_SIZE*chunkSize;
osg::ref_ptr<osgFX::Effect> effect (new Terrain::Effect(layerTextures, blendmapTextures, blendmapScale, blendmapScale));
effect->addCullCallback(new SceneUtil::LightListCallback);
transform->addChild(effect);
#if OSG_VERSION_GREATER_OR_EQUAL(3,3,3)
osg::Node* toAttach = geometry.get();
#else
osg::ref_ptr<osg::Geode> geode (new osg::Geode);
geode->addDrawable(geometry);
osg::Node* toAttach = geode.get();
#endif
effect->addChild(toAttach);
if (mIncrementalCompileOperation)
{
mIncrementalCompileOperation->add(toAttach);
mIncrementalCompileOperation->add(textureCompileDummy);
}
return transform;
}
}
