Remove cached intersection code so that we can support intersecting with

dynamic objects.

diff --git a/src/Scenery/hitlist.cxx b/src/Scenery/hitlist.cxx
index a819afaed4cc1d111aa680bdbd4a9acc3bb2b7fc..e4a1e06f77b5569427c29d1d38b0609a0e307056 100644 (file)
--- a/src/Scenery/hitlist.cxx
+++ b/src/Scenery/hitlist.cxx
@@ -222,7 +222,7 @@ void FGHitList::IntersectBranch( ssgBranch *branch, sgdMat4 m,
          kid = branch->getNextKid() )
     {
        if ( kid->getTraversalMask() & SSGTRAV_HOT ) {
-           bsphere = kid->getBSphere();
+            bsphere = kid->getBSphere();
            sgVec3 fcenter;
            sgCopyVec3( fcenter, bsphere->getCenter() );
            sgdVec3 center;
@@ -230,20 +230,20 @@ void FGHitList::IntersectBranch( ssgBranch *branch, sgdMat4 m,
            center[1] = fcenter[1];
            center[2] = fcenter[2];
            sgdXformPnt3( center, m ) ;
-           double radius_sqd = bsphere->getRadius() * bsphere->getRadius();
+            // watch out for overflow
            if ( sgdClosestPointToLineDistSquared( center, orig, dir ) <
-                radius_sqd )
+                double(bsphere->getRadius() * bsphere->getRadius()) )
            {
                // possible intersections
                if ( kid->isAKindOf ( ssgTypeBranch() ) ) {
                    sgdMat4 m_new;
                    sgdCopyMat4(m_new, m);
                    if ( kid->isA( ssgTypeTransform() ) ) {
-                       sgMat4 fxform;
-                       ((ssgTransform *)kid)->getTransform( fxform );
-                       sgdMat4 xform;
-                       sgdSetMat4( xform, fxform );
-                       sgdPreMultMat4( m_new, xform );
+                        sgMat4 fxform;
+                        ((ssgTransform *)kid)->getTransform( fxform );
+                        sgdMat4 xform;
+                        sgdSetMat4( xform, fxform );
+                        sgdPreMultMat4( m_new, xform );
                    }
                    IntersectBranch( (ssgBranch *)kid, m_new, orig, dir );
                } else if ( kid->isAKindOf ( ssgTypeLeaf() ) ) {
@@ -307,8 +307,8 @@ void FGHitList::IntersectCachedLeaf( sgdMat4 m,
        sgdXformPnt3( center, m );
 
        if ( sgdClosestPointToLineDistSquared( center, orig, dir ) <
-            radius*radius )
-        {
+            double(radius*radius) )
+       {
            IntersectLeaf( (ssgLeaf *)last_hit(), m, orig, dir );
        }
     }
@@ -357,34 +357,34 @@ bool fgCurrentElev( sgdVec3 abs_view_pos, sgdVec3 scenery_center,
     
     int hitcount = hit_list->num_hits();
     for ( int i = 0; i < hitcount; ++i ) {
-       geoc = sgCartToPolar3d( sc + hit_list->get_point(i) );      
-       double lat_geod, alt, sea_level_r;
-       sgGeocToGeod(geoc.lat(), geoc.radius(), &lat_geod, 
-                    &alt, &sea_level_r);
-       if ( alt > result && alt < 10000 ) {
-           result = alt;
-           this_hit = i;
-       }
+        geoc = sgCartToPolar3d( sc + hit_list->get_point(i) );      
+        double lat_geod, alt, sea_level_r;
+        sgGeocToGeod(geoc.lat(), geoc.radius(), &lat_geod, 
+                     &alt, &sea_level_r);
+        if ( alt > result && alt < 10000 ) {
+            result = alt;
+            this_hit = i;
+        }
     }
 
     if ( result > -9000 ) {
-       *terrain_elev = result;
-       *radius = geoc.radius();
-       sgVec3 tmp;
-       sgSetVec3(tmp, hit_list->get_normal(this_hit));
-       // cout << "cur_normal: " << tmp[0] << " " << tmp[1] << " "
-       //      << tmp[2] << endl;
-       /* ssgState *IntersectedLeafState =
-           ((ssgLeaf*)hit_list->get_entity(this_hit))->getState(); */
-       CurrentNormalInLocalPlane(tmp, tmp);
-       sgdSetVec3( normal, tmp );
-       // cout << "NED: " << tmp[0] << " " << tmp[1] << " " << tmp[2] << endl;
-       return true;
+        *terrain_elev = result;
+        *radius = geoc.radius();
+        sgVec3 tmp;
+        sgSetVec3(tmp, hit_list->get_normal(this_hit));
+        // cout << "cur_normal: " << tmp[0] << " " << tmp[1] << " "
+        //      << tmp[2] << endl;
+        /* ssgState *IntersectedLeafState =
+           ((ssgLeaf*)hit_list->get_entity(this_hit))->getState(); */
+        CurrentNormalInLocalPlane(tmp, tmp);
+        sgdSetVec3( normal, tmp );
+        // cout << "NED: " << tmp[0] << " " << tmp[1] << " " << tmp[2] << endl;
+        return true;
     } else {
-       SG_LOG( SG_TERRAIN, SG_INFO, "no terrain intersection" );
-       *terrain_elev = 0.0;
-       float *up = globals->get_current_view()->get_world_up();
-       sgdSetVec3(normal, up[0], up[1], up[2]);
-       return false;
+        SG_LOG( SG_TERRAIN, SG_INFO, "no terrain intersection" );
+        *terrain_elev = 0.0;
+        float *up = globals->get_current_view()->get_world_up();
+        sgdSetVec3(normal, up[0], up[1], up[2]);
+        return false;
     }
 }

diff --git a/src/Scenery/hitlist.hxx b/src/Scenery/hitlist.hxx
index 709b23a205fb106b12b8d05f12aa986781561647..b734897002d389897b816150911179c4e9ec69da 100644 (file)
--- a/src/Scenery/hitlist.hxx
+++ b/src/Scenery/hitlist.hxx
@@ -80,17 +80,23 @@ inline void FGHitList::Intersect( ssgBranch *scene,
 {
     sgdMat4 m;
 
+#ifdef USE_CACHED_HIT
+       // This optimization gives a slight speedup
+       // but it precludes using the hitlist for dynamic
+       // objects  NHV
     init();
-
     if( last_hit() ) {
        sgdMakeIdentMat4 ( m ) ;
        IntersectCachedLeaf(m, orig, dir);
     }
     if( ! num_hits() ) {
+#endif
        clear();
        sgdMakeIdentMat4 ( m ) ;
        IntersectBranch( scene, m, orig, dir);
+#ifdef USE_CACHED_HIT
     }
+#endif
 }