130 lines
3.5 KiB
Plaintext
130 lines
3.5 KiB
Plaintext
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/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2008-2014 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#pragma once
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#include <osgEarth/Common>
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#include <osgEarth/TileKey>
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#include <osgEarth/TextureArena>
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#include <osgEarth/Layer>
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#include <osgEarth/TileMesher>
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#include <osg/Matrix>
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namespace osgUtil {
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class StateToCompile;
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}
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namespace osgEarth
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{
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using namespace Util;
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/**
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* Data model backing an individual terrain tile.
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*/
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class OSGEARTH_EXPORT TerrainTileModel : public osg::Referenced
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{
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public:
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struct Tile
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{
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int revision = -1;
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Texture::Ptr texture;
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osg::Matrixf matrix;
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};
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struct ColorLayer : public Tile
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{
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using Vector = std::vector<ColorLayer>;
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osg::ref_ptr<Layer> layer;
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};
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struct Elevation : public Tile
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{
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float minHeight = FLT_MAX;
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float maxHeight = -FLT_MAX;
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osg::ref_ptr<const osg::HeightField> heightField;
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};
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struct NormalMap : public Tile
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{
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// empty
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};
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struct LandCover : public ColorLayer
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{
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// empty
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};
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public:
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//! Create a new empty data model for a tile/revision pair
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TerrainTileModel(const TileKey& key_, int revision_) :
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key(key_), revision(revision_) { }
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//! Tile key corresponding to this model
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TileKey key;
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//! Map model revision from which this model was created
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int revision = -1;
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//! Whether some data here requires updates
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bool requiresUpdateTraversal = false;
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//! Terrain mesh
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TileMesh mesh;
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//! Imagery and other surface coloring layers
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ColorLayer::Vector colorLayers;
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//! Indices of shared data layers
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std::vector<unsigned> sharedLayerIndices;
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//! Elevation data
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Elevation elevation;
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//! Normal map data
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NormalMap normalMap;
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//! Land coverage data
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LandCover landCover;
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public:
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bool empty() const
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{
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return
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mesh.verts == nullptr &&
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colorLayers.empty() &&
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elevation.heightField == nullptr;
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}
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//! Get a texture given a layer ID
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Texture::Ptr getTexture(UID layerUID) const;
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const osg::Matrixf& getMatrix(UID layerUID) const;
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//! Populates the output object with things that the
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//! ICO can pre-compile.
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//! @param out Where to place objects that need pre-compiling
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//! @param bindless Whether to treat textures as bindless textures
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//! that will be managed by a TextureArena
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void getStateToCompile(
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osgUtil::StateToCompile& out,
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bool bindless,
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osg::Object* token) const;
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};
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}
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