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