97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
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#ifndef _HITLIST_HXX
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#define _HITLIST_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#include <simgear/compiler.h>
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#include <vector>
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#include <plib/ssg.h>
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FG_USING_STD(vector);
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class FGHitRec {
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private:
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ssgEntity *ent;
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int index;
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sgdVec3 point;
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sgdVec3 normal;
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public:
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FGHitRec( ssgEntity *e, int idx, sgdVec3 p, sgdVec3 n ) {
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ent = e;
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index = idx;
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sgdSetVec3(point,p[0],p[1],p[2]);
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sgdSetVec3(normal,n[0],n[1],n[2]);
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}
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ssgEntity *get_entity(void) { return ent; }
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int get_face(void) { return index; }
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double *get_point(void) { return point; }
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double *get_normal(void) { return normal; }
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};
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class FGHitList {
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private:
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ssgEntity *last;
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vector < FGHitRec > list;
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public:
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FGHitList() { last = NULL; }
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void init(void) { list.clear(); }
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void clear(void) { init(); last = NULL; }
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void add( ssgEntity *ent, int idx, sgdVec3 point, sgdVec3 normal ) {
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list.push_back( FGHitRec( ent,idx,point,normal) );
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last = ent;
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}
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int num_hits(void) { return list.size(); }
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ssgEntity *get_entity(int i) { return list[i].get_entity(); }
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ssgEntity *last_hit(void) { return last; }
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int get_face(int i) { return list[i].get_face(); }
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double *get_point(int i) { return list[i].get_point(); }
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double *get_normal(int i) { return list[i].get_normal(); }
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void Intersect( ssgBranch *branch,
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sgdVec3 orig, sgdVec3 dir );
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void IntersectBranch( ssgBranch *branch, sgdMat4 m,
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sgdVec3 orig, sgdVec3 dir);
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void IntersectCachedLeaf( sgdMat4 m,
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sgdVec3 orig, sgdVec3 dir);
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int IntersectLeaf( ssgLeaf *leaf, sgdMat4 m,
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sgdVec3 orig, sgdVec3 dir );
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};
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inline void FGHitList::Intersect( ssgBranch *scene,
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sgdVec3 orig, sgdVec3 dir )
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{
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sgdMat4 m;
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init();
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if( last_hit() ) {
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sgdMakeIdentMat4 ( m ) ;
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IntersectCachedLeaf(m, orig, dir);
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}
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if( ! num_hits() ) {
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clear();
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sgdMakeIdentMat4 ( m ) ;
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IntersectBranch( scene, m, orig, dir);
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}
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}
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#endif // _HITLIST_HXX
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