150 lines
4.6 KiB
C++
150 lines
4.6 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library 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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* OpenSceneGraph Public License for more details.
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*/
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#include "Exception.h"
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#include "HeightFieldLayer.h"
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#include "Layer.h"
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#include <osgDB/ReadFile>
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#include <osg/io_utils>
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using namespace ive;
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void HeightFieldLayer::write(DataOutputStream* out)
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{
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// Write Layer's identification.
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out->writeInt(IVEHEIGHTFIELDLAYER);
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// If the osg class is inherited by any other class we should also write this to file.
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osgTerrain::Layer* layer = dynamic_cast<osgTerrain::Layer*>(this);
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if (layer)
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((ive::Layer*)(layer))->write(out);
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else
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out_THROW_EXCEPTION("HeightFieldLayer::write(): Could not cast this osgLayer::HeightFieldLayer to an osgTerrain::Layer.");
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if (getFileName().empty() && getHeightField())
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{
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osg::HeightField* hf = getHeightField();
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// using inline heightfield
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out->writeBool(true);
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if (out->getVersion()>=VERSION_0035)
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{
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// Write HeightField's properties.
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out->writeUInt(hf->getNumColumns());
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out->writeUInt(hf->getNumRows());
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out->writeVec3(hf->getOrigin());
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out->writeFloat(hf->getXInterval());
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out->writeFloat(hf->getYInterval());
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out->writeQuat(hf->getRotation());
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out->writeFloat(hf->getSkirtHeight());
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out->writeUInt(hf->getBorderWidth());
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float maxError = 0.0f;
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if (getLocator())
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{
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osg::Vec3d world_origin, world_corner;
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getLocator()->convertLocalToModel(osg::Vec3d(0.0,0.0,0.0), world_origin);
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getLocator()->convertLocalToModel(osg::Vec3d(1.0,1.0,0.0), world_corner);
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double distance = (world_origin-world_corner).length();
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maxError = distance * out->getTerrainMaximumErrorToSizeRatio();
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}
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out->writePackedFloatArray(hf->getFloatArray(), maxError);
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}
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else
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{
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out->writeShape(getHeightField());
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}
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}
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else
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{
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// using external heightfield file
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out->writeBool(false);
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out->writeString(getFileName());
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}
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}
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void HeightFieldLayer::read(DataInputStream* in)
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{
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// Peek on Layer's identification.
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int id = in->peekInt();
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if (id != IVEHEIGHTFIELDLAYER)
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in_THROW_EXCEPTION("HeightFieldLayer::read(): Expected HeightFieldLayer identification.");
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// Read Layer's identification.
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id = in->readInt();
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// If the osg class is inherited by any other class we should also read this from file.
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osgTerrain::Layer* layer = dynamic_cast<osgTerrain::Layer*>(this);
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if (layer)
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((ive::Layer*)(layer))->read(in);
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else
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in_THROW_EXCEPTION("HeightFieldLayer::read(): Could not cast this osgLayer::Layer to an osg::Group.");
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bool useInlineHeightField = in->readBool();
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if (useInlineHeightField)
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{
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if (in->getVersion()>=VERSION_0035)
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{
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osg::HeightField* hf = new osg::HeightField;
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// Read HeightField's properties
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//setColor(in->readVec4());
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unsigned int col = in->readUInt();
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unsigned int row = in->readUInt();
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hf->allocate(col,row);
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hf->setOrigin(in->readVec3());
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hf->setXInterval(in->readFloat());
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hf->setYInterval(in->readFloat());
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hf->setRotation(in->readQuat());
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hf->setSkirtHeight(in->readFloat());
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hf->setBorderWidth(in->readUInt());
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if (in->getVersion()>=VERSION_0035)
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{
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in->readPackedFloatArray(hf->getFloatArray());
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}
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setHeightField(hf);
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}
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else
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{
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osg::Shape* shape = in->readShape();
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setHeightField(dynamic_cast<osg::HeightField*>(shape));
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}
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}
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else
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{
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std::string filename = in->readString();
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setFileName(filename);
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setHeightField(osgDB::readHeightFieldFile(filename,in->getOptions()));
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}
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}
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