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2023-08-07 19:29:24 +08:00
commit 34d6c5d489
4832 changed files with 1389451 additions and 0 deletions
--- a/CryPhysics/bvtree.h
+++ b/CryPhysics/bvtree.h
@@ -0,0 +1,142 @@
+#ifndef bvtree_h
+#define bvtree_h
+
+extern indexed_triangle g_IdxTriBuf[256];
+extern int g_IdxTriBufPos;
+extern cylinder g_CylBuf[2];
+extern int g_CylBufPos;
+extern sphere g_SphBuf[2];
+extern int g_SphBufPos;
+extern box g_BoxBuf[2];
+extern int g_BoxBufPos;
+
+////////////////////////// bounding volumes ////////////////////////
+
+struct BV {
+	int type;
+	int iNode;
+	operator primitive*() { return (primitive*)((char*)this+sizeof(type)+sizeof(iNode)); }
+};
+
+struct BBox : BV {
+	box abox;
+};
+extern BBox g_BBoxBuf[128];
+extern int g_BBoxBufPos;
+
+struct BVheightfield : BV {
+	heightfield hf;
+};
+
+struct BVray : BV {
+	ray aray;
+};
+
+inline void ResetGlobalPrimsBuffers()
+{
+	g_BBoxBufPos = 0;
+	g_IdxTriBufPos = 0;
+	g_CylBufPos = 0;
+	g_BoxBufPos = 0;
+	g_SphBufPos = 0;
+}
+
+class CGeometry;
+class CBVTree;
+
+struct surface_desc {
+	vectorf n;
+	int idx;
+	int iFeature;
+};
+struct edge_desc {
+	vectorf dir;
+	vectorf n[2];
+	int idx;
+	int iFeature;
+};
+
+struct geometry_under_test {
+	CGeometry *pGeometry;
+	CBVTree *pBVtree;
+	int *pUsedNodesMap;
+	int *pUsedNodesIdx;
+	int nUsedNodes;
+	int nMaxUsedNodes;
+	int bStopIntersection;
+	int bCurNodeUsed;
+
+	matrix3x3f R,R_rel;
+	vectorf offset,offset_rel;
+	float scale,rscale, scale_rel,rscale_rel;
+	int bTransformUpdated;
+
+	vectorf v;
+	vectorf w,centerOfMass;
+	vectorf centerOfRotation;
+	intersection_params *pParams;
+
+	vectorf axisContactNormal;
+	vectorf sweepdir,sweepdir_loc;
+	float sweepstep,sweepstep_loc;
+	vectorf ptOutsidePivot;
+
+	int typeprim;
+	primitive *primbuf; // used to get node contents
+	primitive *primbuf1;// used to get unprojection candidates
+	int szprimbuf,szprimbuf1;
+	int *iFeature_buf; // feature that led to this primitive
+	short *idbuf; // ids of unprojection candidates
+	int szprim;
+
+	surface_desc *surfaces;	// the last potentially surfaces 
+	edge_desc *edges;	// the last potentially contacting edges
+	int nSurfaces,nEdges;
+	float minAreaEdge;
+
+	geom_contact *contacts;
+	int *pnContacts;
+	int nMaxContacts;
+};
+
+enum BVtreetypes { BVT_OBB=0, BVT_AABB=1, BVT_SINGLEBOX=2, BVT_RAY=3, BVT_HEIGHTFIELD=4 };
+
+class CBVTree {
+public:
+	virtual ~CBVTree() {}
+	virtual int GetType() = 0;
+	virtual void GetBBox(box *pbox) {}
+	virtual int MaxPrimsInNode() { return 1; }
+	virtual float Build(CGeometry *pGeom) = 0;
+	virtual void SetGeomConvex() {}
+
+	virtual int PrepareForIntersectionTest(geometry_under_test *pGTest) {
+		pGTest->pUsedNodesMap = 0;
+		pGTest->pUsedNodesIdx = 0;
+		pGTest->nMaxUsedNodes = 0;
+		pGTest->nUsedNodes = -1;
+		return 1;
+	}
+	virtual void CleanupAfterIntersectionTest(geometry_under_test *pGTest) {}
+	virtual void GetNodeBV(BV *&pBV, int iNode=0) = 0;
+	virtual void GetNodeBV(BV *&pBV, const vectorf &sweepdir,float sweepstep, int iNode=0) = 0;
+	virtual void GetNodeBV(const matrix3x3f &Rw,const vectorf &offsw,float scalew, BV *&pBV, int iNode=0) = 0;
+	virtual void GetNodeBV(const matrix3x3f &Rw,const vectorf &offsw,float scalew, BV *&pBV, const vectorf &sweepdir,float sweepstep, int iNode=0) = 0;
+	virtual float SplitPriority(const BV* pBV) { return 0.0f; }
+	virtual void GetNodeChildrenBVs(const matrix3x3f &Rw,const vectorf &offsw,float scalew, const BV *pBV_parent, BV *&pBV_child1,BV *&pBV_child2) {}
+	virtual void GetNodeChildrenBVs(const BV *pBV_parent, BV *&pBV_child1,BV *&pBV_child2) {}
+	virtual void GetNodeChildrenBVs(const BV *pBV_parent, const vectorf &sweepdir,float sweepstep, BV *&pBV_child1,BV *&pBV_child2) {}
+	virtual void ReleaseLastBVs() {}
+	virtual void ReleaseLastSweptBVs() {}
+
+	virtual void GetMemoryStatistics(ICrySizer *pSizer) {}
+	virtual void Save(CMemStream &stm) {}
+	virtual void Load(CMemStream &stm, CGeometry *pGeom) {}
+
+	virtual int GetNodeContents(int iNode, BV *pBVCollider,int bColliderUsed,int bColliderLocal, 
+		geometry_under_test *pGTest,geometry_under_test *pGTestOp) = 0;
+	virtual int GetNodeContentsIdx(int iNode, int &iStartPrim) { iStartPrim=0; return 1; }
+	virtual void MarkUsedTriangle(int itri, geometry_under_test *pGTest) {}
+};
+
+#endif