+// hitlist.hxx
+// Height Over Terrain and Assosciated Routines for FlightGear based Scenery
+// Written by Norman Vine, started 2000.
+
#ifndef _HITLIST_HXX
#define _HITLIST_HXX
SG_USING_STD(vector);
-
class FGHitRec {
private:
public:
FGHitRec( ssgEntity *e, int idx, sgdVec3 p, sgdVec3 n ) {
- ent = e;
- index = idx;
- sgdSetVec3(point,p[0],p[1],p[2]);
- sgdSetVec3(normal,n[0],n[1],n[2]);
+ ent = e;
+ index = idx;
+ sgdSetVec3(point,p[0],p[1],p[2]);
+ sgdSetVec3(normal,n[0],n[1],n[2]);
}
ssgEntity *get_entity(void) { return ent; }
ssgEntity *last;
vector < FGHitRec > list;
+ double test_dist;
public:
- FGHitList() { last = NULL; }
- void init(void) { list.clear(); }
+ FGHitList();
+ ~FGHitList();
+
+ void init(void) { list.clear(); test_dist=DBL_MAX; }
void clear(void) { init(); last = NULL; }
void add( ssgEntity *ent, int idx, sgdVec3 point, sgdVec3 normal ) {
- list.push_back( FGHitRec( ent,idx,point,normal) );
- last = ent;
+ list.push_back( FGHitRec( ent,idx,point,normal) );
+ last = ent;
}
int num_hits(void) { return list.size(); }
ssgEntity *get_entity(int i) { return list[i].get_entity(); }
int get_face(int i) { return list[i].get_face(); }
double *get_point(int i) { return list[i].get_point(); }
double *get_normal(int i) { return list[i].get_normal(); }
-
- void Intersect( ssgBranch *branch,
- sgdVec3 orig, sgdVec3 dir );
-
- void IntersectBranch( ssgBranch *branch, sgdMat4 m,
- sgdVec3 orig, sgdVec3 dir);
-
- void IntersectCachedLeaf( sgdMat4 m,
- sgdVec3 orig, sgdVec3 dir);
-
- int IntersectLeaf( ssgLeaf *leaf, sgdMat4 m,
- sgdVec3 orig, sgdVec3 dir );
-};
+ void Intersect( ssgBranch *branch, sgdVec3 orig, sgdVec3 dir );
+ void Intersect( ssgBranch *scene, sgdMat4 m, sgdVec3 orig, sgdVec3 dir );
-inline void FGHitList::Intersect( ssgBranch *scene,
- sgdVec3 orig, sgdVec3 dir )
-{
- sgdMat4 m;
+ void IntersectBranch( ssgBranch *branch, sgdMat4 m, sgdVec3 orig, sgdVec3 dir);
-#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
-}
+ int IntersectLeaf( ssgLeaf *leaf, sgdMat4 m,
+ sgdVec3 orig, sgdVec3 dir );
+
+ int IntersectLeaf( ssgLeaf *leaf, sgdMat4 m,
+ sgdVec3 orig, sgdVec3 dir,
+ GLenum primType );
+};
-// Associated function, assuming a wgs84 world with 0,0,0 at the
+// Associated functions, assuming a wgs84 world with 0,0,0 at the
// center, find the current terrain intersection elevation for the
// point specified.
-bool fgCurrentElev( sgdVec3 abs_view_pos, sgdVec3 scenery_center,
- FGHitList *hit_list,
- double *terrain_elev, double *radius, double *normal );
-
+bool fgCurrentElev( sgdVec3 abs_view_pos,
+ double max_alt_m,
+ sgdVec3 scenery_center,
+ ssgTransform *terra_transform,
+ FGHitList *hit_list,
+ double *terrain_elev,
+ double *radius,
+ double *normal );
+
+bool fgCurrentElev( sgdVec3 abs_view_pos,
+ double max_alt_m,
+ sgdVec3 scenery_center,
+ FGHitList *hit_list,
+ double *terrain_elev,
+ double *radius,
+ double *normal );
#endif // _HITLIST_HXX