X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FScenery%2Fhitlist.hxx;h=df54ef26a6abbe4ff6c016a089537774893a09d9;hb=048da049f87fe3f543795f3b1b511d774caa2787;hp=3a4da70a14bd3b8620c0253311042a56977440a1;hpb=bb61414e04c908b7209566527ebf409821188f8d;p=flightgear.git

diff --git a/src/Scenery/hitlist.hxx b/src/Scenery/hitlist.hxx
index 3a4da70a1..df54ef26a 100644
--- a/src/Scenery/hitlist.hxx
+++ b/src/Scenery/hitlist.hxx
@@ -1,3 +1,7 @@
+// hitlist.hxx
+// Height Over Terrain and Assosciated Routines for FlightGear based Scenery
+// Written by Norman Vine, started 2000.
+
 #ifndef _HITLIST_HXX
 #define _HITLIST_HXX
 
@@ -11,8 +15,7 @@
 
 #include <plib/ssg.h>
 
-FG_USING_STD(vector);
-
+SG_USING_STD(vector);
 
 class FGHitRec {
 
@@ -25,10 +28,10 @@ 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; }
@@ -44,15 +47,18 @@ private:
 
     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(); }
@@ -60,37 +66,37 @@ public:
     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 );
+
+    void IntersectBranch( ssgBranch *branch, sgdMat4 m, sgdVec3 orig, sgdVec3 dir);
 
-inline void FGHitList::Intersect( ssgBranch *scene,
-				  sgdVec3 orig, sgdVec3 dir )
-{
-    sgdMat4 m;
+    int IntersectLeaf( ssgLeaf *leaf, sgdMat4 m,
+                       sgdVec3 orig, sgdVec3 dir );
+
+    int IntersectLeaf( ssgLeaf *leaf, sgdMat4 m,
+                       sgdVec3 orig, sgdVec3 dir,
+                       GLenum primType );
+};
 
-    init();
 
-    if( last_hit() ) {
-	sgdMakeIdentMat4 ( m ) ;
-	IntersectCachedLeaf(m, orig, dir);
-    }
-    if( ! num_hits() ) {
-	clear();
-	sgdMakeIdentMat4 ( m ) ;
-	IntersectBranch( scene, m, orig, dir);
-    }
-}
+// 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,
+                    ssgTransform *terra_transform,
+                    FGHitList *hit_list,
+                    double *terrain_elev,
+                    double *radius,
+                    double *normal );
+
+bool fgCurrentElev( sgdVec3 abs_view_pos,
+                    sgdVec3 scenery_center,
+                    FGHitList *hit_list,
+                    double *terrain_elev,
+                    double *radius,
+                    double *normal );
 
 #endif // _HITLIST_HXX