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#include "chunkmanager.hpp"
#include <osg/Material>
#include <osg/Texture2D>
#include <osgUtil/IncrementalCompileOperation>
#include <components/resource/objectcache.hpp>
#include <components/resource/scenemanager.hpp>
#include <components/sceneutil/lightmanager.hpp>
#include "compositemaprenderer.hpp"
#include "material.hpp"
#include "storage.hpp"
#include "terraindrawable.hpp"
#include "texturemanager.hpp"
namespace Terrain
{
ChunkManager::ChunkManager(Storage* storage, Resource::SceneManager* sceneMgr, TextureManager* textureManager,
CompositeMapRenderer* renderer, ESM::RefId worldspace, double expiryDelay)
: GenericResourceManager<ChunkKey>(nullptr, expiryDelay)
, QuadTreeWorld::ChunkManager(worldspace)
, mStorage(storage)
, mSceneManager(sceneMgr)
, mTextureManager(textureManager)
, mCompositeMapRenderer(renderer)
, mNodeMask(0)
, mCompositeMapSize(512)
, mCompositeMapLevel(1.f)
, mMaxCompGeometrySize(1.f)
{
mMultiPassRoot = new osg::StateSet;
mMultiPassRoot->setRenderingHint(osg::StateSet::OPAQUE_BIN);
osg::ref_ptr<osg::Material> material(new osg::Material);
material->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
mMultiPassRoot->setAttributeAndModes(material, osg::StateAttribute::ON);
}
osg::ref_ptr<osg::Node> ChunkManager::getChunk(float size, const osg::Vec2f& center, unsigned char lod,
unsigned int lodFlags, bool activeGrid, const osg::Vec3f& viewPoint, bool compile)
{
// Override lod with the vertexLodMod adjusted value.
// TODO: maybe we can refactor this code by moving all vertexLodMod code into this class.
lod = static_cast<unsigned char>(lodFlags >> (4 * 4));
const ChunkKey key{ .mCenter = center, .mLod = lod, .mLodFlags = lodFlags };
if (osg::ref_ptr<osg::Object> obj = mCache->getRefFromObjectCache(key))
return static_cast<osg::Node*>(obj.get());
const TerrainDrawable* templateGeometry = nullptr;
const TemplateKey templateKey{ .mCenter = center, .mLod = lod };
const auto pair = mCache->lowerBound(templateKey);
if (pair.has_value() && templateKey == TemplateKey{ .mCenter = pair->first.mCenter, .mLod = pair->first.mLod })
templateGeometry = static_cast<const TerrainDrawable*>(pair->second.get());
osg::ref_ptr<osg::Node> node = createChunk(size, center, lod, lodFlags, compile, templateGeometry);
mCache->addEntryToObjectCache(key, node.get());
return node;
}
void ChunkManager::reportStats(unsigned int frameNumber, osg::Stats* stats) const
{
Resource::reportStats("Terrain Chunk", frameNumber, mCache->getStats(), *stats);
}
void ChunkManager::clearCache()
{
GenericResourceManager<ChunkKey>::clearCache();
mBufferCache.clearCache();
}
void ChunkManager::releaseGLObjects(osg::State* state)
{
GenericResourceManager<ChunkKey>::releaseGLObjects(state);
mBufferCache.releaseGLObjects(state);
}
osg::ref_ptr<osg::Texture2D> ChunkManager::createCompositeMapRTT()
{
osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D;
texture->setTextureWidth(mCompositeMapSize);
texture->setTextureHeight(mCompositeMapSize);
texture->setInternalFormat(GL_RGB);
texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
return texture;
}
void ChunkManager::createCompositeMapGeometry(
float chunkSize, const osg::Vec2f& chunkCenter, const osg::Vec4f& texCoords, CompositeMap& compositeMap)
{
if (chunkSize > mMaxCompGeometrySize)
{
createCompositeMapGeometry(chunkSize / 2.f, chunkCenter + osg::Vec2f(chunkSize / 4.f, chunkSize / 4.f),
osg::Vec4f(
texCoords.x() + texCoords.z() / 2.f, texCoords.y(), texCoords.z() / 2.f, texCoords.w() / 2.f),
compositeMap);
createCompositeMapGeometry(chunkSize / 2.f, chunkCenter + osg::Vec2f(-chunkSize / 4.f, chunkSize / 4.f),
osg::Vec4f(texCoords.x(), texCoords.y(), texCoords.z() / 2.f, texCoords.w() / 2.f), compositeMap);
createCompositeMapGeometry(chunkSize / 2.f, chunkCenter + osg::Vec2f(chunkSize / 4.f, -chunkSize / 4.f),
osg::Vec4f(texCoords.x() + texCoords.z() / 2.f, texCoords.y() + texCoords.w() / 2.f,
texCoords.z() / 2.f, texCoords.w() / 2.f),
compositeMap);
createCompositeMapGeometry(chunkSize / 2.f, chunkCenter + osg::Vec2f(-chunkSize / 4.f, -chunkSize / 4.f),
osg::Vec4f(
texCoords.x(), texCoords.y() + texCoords.w() / 2.f, texCoords.z() / 2.f, texCoords.w() / 2.f),
compositeMap);
}
else
{
float left = texCoords.x() * 2.f - 1;
float top = texCoords.y() * 2.f - 1;
float width = texCoords.z() * 2.f;
float height = texCoords.w() * 2.f;
std::vector<osg::ref_ptr<osg::StateSet>> passes = createPasses(chunkSize, chunkCenter, true);
for (std::vector<osg::ref_ptr<osg::StateSet>>::iterator it = passes.begin(); it != passes.end(); ++it)
{
osg::ref_ptr<osg::Geometry> geom = osg::createTexturedQuadGeometry(
osg::Vec3(left, top, 0), osg::Vec3(width, 0, 0), osg::Vec3(0, height, 0));
geom->setUseDisplayList(
false); // don't bother making a display list for an object that is just rendered once.
geom->setUseVertexBufferObjects(false);
geom->setTexCoordArray(1, geom->getTexCoordArray(0), osg::Array::BIND_PER_VERTEX);
geom->setStateSet(*it);
compositeMap.mDrawables.emplace_back(geom);
}
}
}
std::vector<osg::ref_ptr<osg::StateSet>> ChunkManager::createPasses(
float chunkSize, const osg::Vec2f& chunkCenter, bool forCompositeMap)
{
std::vector<LayerInfo> layerList;
std::vector<osg::ref_ptr<osg::Image>> blendmaps;
mStorage->getBlendmaps(chunkSize, chunkCenter, blendmaps, layerList, mWorldspace);
bool useShaders = mSceneManager->getForceShaders();
if (!mSceneManager->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;
{
for (std::vector<LayerInfo>::const_iterator it = layerList.begin(); it != layerList.end(); ++it)
{
TextureLayer textureLayer;
textureLayer.mParallax = it->mParallax;
textureLayer.mSpecular = it->mSpecular;
textureLayer.mDiffuseMap = mTextureManager->getTexture(it->mDiffuseMap);
if (!forCompositeMap && !it->mNormalMap.empty())
textureLayer.mNormalMap = mTextureManager->getTexture(it->mNormalMap);
if (it->requiresShaders())
useShaders = true;
layers.push_back(textureLayer);
}
}
if (forCompositeMap)
useShaders = false;
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);
}
float blendmapScale = mStorage->getBlendmapScale(chunkSize);
return ::Terrain::createPasses(
useShaders, mSceneManager, layers, blendmapTextures, blendmapScale, blendmapScale);
}
osg::ref_ptr<osg::Node> ChunkManager::createChunk(float chunkSize, const osg::Vec2f& chunkCenter, unsigned char lod,
unsigned int lodFlags, bool compile, const TerrainDrawable* templateGeometry)
{
osg::ref_ptr<TerrainDrawable> geometry(new TerrainDrawable);
if (!templateGeometry)
{
osg::ref_ptr<osg::Vec3Array> positions(new osg::Vec3Array);
osg::ref_ptr<osg::Vec3Array> normals(new osg::Vec3Array);
osg::ref_ptr<osg::Vec4ubArray> colors(new osg::Vec4ubArray);
colors->setNormalize(true);
mStorage->fillVertexBuffers(lod, chunkSize, chunkCenter, mWorldspace, *positions, *normals, *colors);
osg::ref_ptr<osg::VertexBufferObject> vbo(new osg::VertexBufferObject);
positions->setVertexBufferObject(vbo);
normals->setVertexBufferObject(vbo);
colors->setVertexBufferObject(vbo);
geometry->setVertexArray(positions);
geometry->setNormalArray(normals, osg::Array::BIND_PER_VERTEX);
geometry->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
}
else
{
// Unfortunately we need to copy vertex data because of poor coupling with VertexBufferObject.
osg::ref_ptr<osg::Array> positions
= static_cast<osg::Array*>(templateGeometry->getVertexArray()->clone(osg::CopyOp::DEEP_COPY_ALL));
osg::ref_ptr<osg::Array> normals
= static_cast<osg::Array*>(templateGeometry->getNormalArray()->clone(osg::CopyOp::DEEP_COPY_ALL));
osg::ref_ptr<osg::Array> colors
= static_cast<osg::Array*>(templateGeometry->getColorArray()->clone(osg::CopyOp::DEEP_COPY_ALL));
osg::ref_ptr<osg::VertexBufferObject> vbo(new osg::VertexBufferObject);
positions->setVertexBufferObject(vbo);
normals->setVertexBufferObject(vbo);
colors->setVertexBufferObject(vbo);
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);
if (chunkSize <= 1.f)
geometry->setLightListCallback(new SceneUtil::LightListCallback);
unsigned int numVerts = (mStorage->getCellVertices(mWorldspace) - 1) * chunkSize / (1 << lod) + 1;
geometry->addPrimitiveSet(mBufferCache.getIndexBuffer(numVerts, lodFlags));
bool useCompositeMap = chunkSize >= mCompositeMapLevel;
unsigned int numUvSets = useCompositeMap ? 1 : 2;
geometry->setTexCoordArrayList(osg::Geometry::ArrayList(numUvSets, mBufferCache.getUVBuffer(numVerts)));
geometry->createClusterCullingCallback();
geometry->setStateSet(mMultiPassRoot);
if (templateGeometry)
{
if (templateGeometry->getCompositeMap())
{
geometry->setCompositeMap(templateGeometry->getCompositeMap());
geometry->setCompositeMapRenderer(mCompositeMapRenderer);
}
geometry->setPasses(templateGeometry->getPasses());
}
else
{
if (useCompositeMap)
{
osg::ref_ptr<CompositeMap> compositeMap = new CompositeMap;
compositeMap->mTexture = createCompositeMapRTT();
createCompositeMapGeometry(chunkSize, chunkCenter, osg::Vec4f(0, 0, 1, 1), *compositeMap);
mCompositeMapRenderer->addCompositeMap(compositeMap.get(), false);
geometry->setCompositeMap(compositeMap);
geometry->setCompositeMapRenderer(mCompositeMapRenderer);
TextureLayer layer;
layer.mDiffuseMap = compositeMap->mTexture;
layer.mParallax = false;
layer.mSpecular = false;
geometry->setPasses(::Terrain::createPasses(
mSceneManager->getForceShaders() || !mSceneManager->getClampLighting(), mSceneManager,
std::vector<TextureLayer>(1, layer), std::vector<osg::ref_ptr<osg::Texture2D>>(), 1.f, 1.f));
}
else
{
geometry->setPasses(createPasses(chunkSize, chunkCenter, false));
}
}
geometry->setupWaterBoundingBox(-1, chunkSize * mStorage->getCellWorldSize(mWorldspace) / numVerts);
if (!templateGeometry && compile && mSceneManager->getIncrementalCompileOperation())
{
mSceneManager->getIncrementalCompileOperation()->add(geometry);
}
geometry->setNodeMask(mNodeMask);
return geometry;
}
}
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