Hi Oliver, Any chance you could send me the modified files so I can run it and get a feel for it?
Cheers, Kim. On 30 May 2012 13:32, Oliver Neumann <[email protected]> wrote: > Hi, > > I added a user-definable mask functionallity to FFTOceanSurface. The mask > applies a height offset to the ocean tiles which allows the usage of the > FFTOceanSurface as rivers and lakes on different altitudes in the same > scene without having it protrude the ground (I plan to combine this with > osgEarth). > > Its currently more of a dirty hack, but still its quite usable. > > In the FFTOceanSurface Header I added 2 variables and changed the ctor: > > Code: > > osg::Image *_surfMask; > float _sufMaskMaxDist; > > public: > FFTOceanSurface(unsigned int FFTGridSize = 64, > unsigned int resolution = 256, > unsigned int numTiles = 17, > const osg::Vec2f& windDirection = osg::Vec2f(1.1f, 1.1f), > float windSpeed = 12.f, > float depth = 1000.f, > float reflectionDamping = 0.35f, > float waveScale = 1e-8f, > bool isChoppy = true, > float choppyFactor = -2.5f, > float animLoopTime = 10.f, > unsigned int numFrames = 256, > osg::Image *_surfMask=NULL, > float _sufMaskMaxDist=100.0f > ); > > > > > In FFTOceanSurface.cpp I added this to the computeSea method: > > Before the frame loop: > > Code: > > int imgDim = 0; > int imgBytesPerLine = 0; > int imgBytePerPixel = 0; > > if(_surfMask) > { > imgDim =__min(_surfMask->s(),_surfMask->t()); > imgBytePerPixel = > _surfMask->computeNumComponents(_surfMask->getPixelFormat()); > imgBytesPerLine = _surfMask->s()*imgBytePerPixel; > } > > > > > Within the frame loop before calling OceanTile() for level 0: > > > Code: > > int sizeHeights = heights->size(); > int dimHeights = (int)floor(sqrt((float)sizeHeights)+0.5f); > > if(_surfMask && imgDim>0 && dimHeights>0) // Apply surface mask > { > //Handle scaling difference between > if(dimHeights >= imgDim) > { > int imgScaling = dimHeights/imgDim; > int scaledImgDim = imgDim*imgScaling; > for(int y= 0; y < dimHeights;y++) > { > int yRow = dimHeights*y; > unsigned char* pImgOsgLine = ((unsigned char*)_surfMask->data())+ > imgBytesPerLine * (y/imgScaling); > for(int x = 0; x < dimHeights;x++) > { > if((x < scaledImgDim) &&(y < scaledImgDim)) > { > float alpha =(float)*((unsigned > char*)(pImgOsgLine+(x/imgScaling)*imgBytePerPixel))/255.0f; > float oldVal = heights->at(yRow+x); > heights->at(yRow+x) = alpha*oldVal - _sufMaskMaxDist*(1.0f-alpha); > } > else > { > heights->at(yRow+x) = -_sufMaskMaxDist; > } > } > } > } > else > { > int imgScaling_d1 = imgDim/dimHeights; > int scaledImgDim = imgDim/imgScaling_d1; > for(int y= 0; y < dimHeights;y++) > { > int yRow = dimHeights*y; > unsigned char* pImgOsgLine = ((unsigned char*)_surfMask->data()) + > imgBytesPerLine * y*imgScaling_d1; > for(int x = 0; x < dimHeights;x++) > { > if((x < scaledImgDim) &&(y < scaledImgDim) ) > { > float alpha =(float)*((unsigned > char*)(pImgOsgLine+x*imgScaling_d1*imgBytePerPixel))/255.0f; > float oldVal = heights->at(yRow+x); > heights->at(yRow+x) = alpha*oldVal - _sufMaskMaxDist*(1.0f-alpha); > } > else > { > heights->at(yRow+x) = -_sufMaskMaxDist; > } > } > } > } > } > > > > > Greetings, > Oliver > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=47939#47939 > > > > > Attachments: > http://forum.openscenegraph.org//files/ocean_masked_157.png > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- osgOcean - http://code.google.com/p/osgocean/
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