Changeset 265 for experimental/TerrainTest/rampedEllipsoidTechnique.cpp

Timestamp:

Feb 27, 2011, 8:11:34 PM (13 years ago)

Author:

Torben Dannhauer

Message:

Prototype of rampedEllipsoidFunction works.

File:

• experimental/TerrainTest/rampedEllipsoidTechnique.cpp (modified) (2 diffs)

experimental/TerrainTest/rampedEllipsoidTechnique.cpp

@@ -6 +6 @@
 {
         _height = 0.0;
-        _rampWidth_percent = 10.0;
+        _rampWidthFactor = 0.1; // 10% of ROI is ramp.
 }
 
@@ -15 +15 @@
 void rampedEllipsoidTechnique::modifyHeightfield(osg::Vec4d& modificationROI, osg::HeightField* h, osg::Vec4d tileExtends)
 {
-        //OSG_NOTIFY( osg::ALWAYS ) << "ellipsoidTechnique::modifyHeightfield()" << std::endl;
+        //OSG_NOTIFY( osg::ALWAYS ) << "rampedEllipsoidTechnique::modifyHeightfield()" << std::endl;
         //OSG_NOTIFY( osg::ALWAYS ) << "LAT: " << tileExtends[0] << " | " << tileExtends[1] << std::endl;
         //OSG_NOTIFY( osg::ALWAYS ) << "LON: " << tileExtends[2] << " | " << tileExtends[3] << std::endl;
 
-        // calculate colum start/end and row start/end of affected vertices
-        int startX=0, startY=0, endX=h->getNumColumns(), endY=h->getNumRows();
+        // Determine modificationROI without ramp
+        double deltaLatPerSide = (modificationROI[1] - modificationROI[0]) * _rampWidthFactor / 2.0;
+        double deltaLonPerSide = (modificationROI[3] - modificationROI[2]) * _rampWidthFactor / 2.0;
+        osg::Vec4d coreROI = modificationROI;
+        coreROI[0]+=deltaLatPerSide;
+        coreROI[1]-=deltaLatPerSide;
+        coreROI[2]+=deltaLonPerSide;
+        coreROI[3]-=deltaLonPerSide;
 
-        
-        // Dertermine loop variables..
-        if(tileExtends[0]<modificationROI[0])
-                startY = (modificationROI[0] - tileExtends[0]) / h->getYInterval();
-        if(tileExtends[1]>modificationROI[1])
-                endY = (modificationROI[1] - tileExtends[0]) / h->getYInterval();
+        // Calculate colum start/end and row start/end of affected vertices
+        int Y_start=0, Y_startRamp=0, Y_startCore=0, Y_endCore=0, Y_endRamp=0, Y_end=h->getNumRows();           // Lat
+        int X_start=0, X_startRamp=0, X_startCore=0, X_endCore=0, X_endRamp=0, X_end=h->getNumColumns();        // Lon
 
-        if(tileExtends[2]<modificationROI[2])
-                startX = (modificationROI[2] - tileExtends[2]) / h->getXInterval();
-        if(tileExtends[3]>modificationROI[3])
-                endX = (modificationROI[3] - tileExtends[2]) / h->getXInterval();
+        Y_startRamp = (modificationROI[0]-tileExtends[0]) / h->getYInterval();
+        Y_startCore = (coreROI[0]-tileExtends[0]) / h->getYInterval();
+        Y_endCore   = (coreROI[1]-tileExtends[0]) / h->getYInterval();
+        Y_endRamp   = (modificationROI[1]-tileExtends[0]) / h->getYInterval();
+        clampValue(Y_startRamp, Y_start, Y_end);
+        clampValue(Y_startCore, Y_start, Y_end);
+        clampValue(Y_endCore, Y_start, Y_end);
+        clampValue(Y_endRamp, Y_start, Y_end);
+
+        X_startRamp = (modificationROI[2]-tileExtends[2]) / h->getXInterval();
+        X_startCore = (coreROI[2]-tileExtends[2]) / h->getXInterval();
+        X_endCore   = (coreROI[3]-tileExtends[2]) / h->getXInterval();
+        X_endRamp   = (modificationROI[3]-tileExtends[2]) / h->getXInterval();
+        clampValue(X_startRamp, X_start, X_end);
+        clampValue(X_startCore, X_start, X_end);
+        clampValue(X_endCore, X_start, X_end);
+        clampValue(X_endRamp, X_start, X_end);
+
+        // Determine loop variables..
+        //if(tileExtends[0]<modificationROI[0])
+        //      startY = (modificationROI[0] - tileExtends[0]) / h->getYInterval();
+        //if(tileExtends[1]>modificationROI[1])
+        //      endY = (modificationROI[1] - tileExtends[0]) / h->getYInterval();
+
+        //if(tileExtends[2]<modificationROI[2])
+        //      startX = (modificationROI[2] - tileExtends[2]) / h->getXInterval();
+        //if(tileExtends[3]>modificationROI[3])
+        //      endX = (modificationROI[3] - tileExtends[2]) / h->getXInterval();
 
 
-        // Modify height value of affected vertices
-        for(int x=startX;x<endX;x++)
+        // Modify height value of affected vertices in the core ROI
+        for(int x=X_startRamp;x<X_endRamp;x++)
         {
-                for(int y=startY;y<endY;y++)
+                for(int y=Y_startRamp;y<Y_endRamp;y++)
                 {
-                        h->setHeight( x, y, _height);
+                        if( Y_startCore<=y && y<Y_endCore && X_startCore<=x && x<X_endCore )    // If vertex is inside core: Apply final height
+                        {
+                                h->setHeight( x, y, _height);
+                        }
+                        else    //  vertex is inside ramp but not inside core: apply ramp height
+                        {
+                                h->setHeight( x, y, _height-50.0);
+                        }
+                        
                 }
         }