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90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
#include "terraindrawable.hpp"
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#include <osgUtil/CullVisitor>
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#include <components/sceneutil/lightmanager.hpp>
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namespace Terrain
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{
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TerrainDrawable::TerrainDrawable()
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{
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}
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TerrainDrawable::TerrainDrawable(const TerrainDrawable ©, const osg::CopyOp ©op)
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: osg::Geometry(copy, copyop)
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, mPasses(copy.mPasses)
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, mLightListCallback(copy.mLightListCallback)
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{
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}
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void TerrainDrawable::accept(osg::NodeVisitor &nv)
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{
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if (nv.getVisitorType() != osg::NodeVisitor::CULL_VISITOR)
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{
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osg::Geometry::accept(nv);
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}
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else if (nv.validNodeMask(*this))
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{
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nv.pushOntoNodePath(this);
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cull(static_cast<osgUtil::CullVisitor*>(&nv));
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nv.popFromNodePath();
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}
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}
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inline float distance(const osg::Vec3& coord,const osg::Matrix& matrix)
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{
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return -((float)coord[0]*(float)matrix(0,2)+(float)coord[1]*(float)matrix(1,2)+(float)coord[2]*(float)matrix(2,2)+matrix(3,2));
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}
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void TerrainDrawable::cull(osgUtil::CullVisitor *cv)
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{
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const osg::BoundingBox& bb = getBoundingBox();
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if (_cullingActive && cv->isCulled(getBoundingBox()))
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return;
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osg::RefMatrix& matrix = *cv->getModelViewMatrix();
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float depth = bb.valid() ? distance(bb.center(),matrix) : 0.0f;
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if (osg::isNaN(depth))
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return;
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bool pushedLight = mLightListCallback && mLightListCallback->pushLightState(this, cv);
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for (PassVector::const_iterator it = mPasses.begin(); it != mPasses.end(); ++it)
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{
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cv->pushStateSet(*it);
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cv->addDrawableAndDepth(this, &matrix, depth);
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cv->popStateSet();
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}
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if (pushedLight)
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cv->popStateSet();
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}
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void TerrainDrawable::setPasses(const TerrainDrawable::PassVector &passes)
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{
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mPasses = passes;
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}
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void TerrainDrawable::setLightListCallback(SceneUtil::LightListCallback *lightListCallback)
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{
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mLightListCallback = lightListCallback;
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}
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void TerrainDrawable::compileGLObjects(osg::RenderInfo &renderInfo) const
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{
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for (PassVector::const_iterator it = mPasses.begin(); it != mPasses.end(); ++it)
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{
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osg::StateSet* stateset = *it;
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stateset->compileGLObjects(*renderInfo.getState());
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}
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osg::Geometry::compileGLObjects(renderInfo);
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}
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}
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