101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
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// $Id$
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//
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// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2006 Joerg Henrichs
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distribhuted in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#ifndef _HEADER_STATICSSG_
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#define _HEADER_STATICSSG_
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#include <vector>
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#include <plib/ssg.h>
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#define NOINTERSECT -999999.9f
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class InfoTriangle
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{
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public:
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ssgLeaf* m_leaf;
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int m_indx;
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sgVec3 m_vv1,m_vv2,m_vv3;
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unsigned int m_test_nr;
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sgVec4 m_plane;
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float m_x_min, m_x_max, m_y_min, m_y_max;
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// distance to plane in case of a hit, undefined otherwise
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float m_dist;
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public:
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InfoTriangle() {};
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InfoTriangle(ssgLeaf* l,int i,sgVec3 v1,sgVec3 v2,sgVec3 v3)
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{
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m_leaf = l; m_indx=i;
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sgCopyVec3(m_vv1,v1);
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sgCopyVec3(m_vv2,v2);
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sgCopyVec3(m_vv3,v3);
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m_test_nr=0;
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l->ref();
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}
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~InfoTriangle() { ssgDeRefDelete(m_leaf); }
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float hot(sgVec3 p);
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int collision(sgSphere *s);
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}
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; // InfoTriangle
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// =============================================================================
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typedef std::vector<InfoTriangle*> AllHits;
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// =============================================================================
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class StaticSSG
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{
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private:
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/* allLeavesType is a list storing all triangles which
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touch a certain hash bucket. */
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typedef std::vector<InfoTriangle*> allLeavesType;
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/* This is the list of buckets, each of which stores
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a list of leaves at that hash value/bucket */
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typedef std::vector<allLeavesType> allBucketsType;
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allLeavesType m_all_leaves;
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allBucketsType* m_buckets;
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float m_x_min, m_x_max, m_y_min, m_y_max;
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int m_n, m_m;
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unsigned int m_test_number;
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float m_invdx, m_invdy;
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ssgEntity* m_start;
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void Setup (int n);
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void Distribute (ssgEntity* start, sgMat4 m);
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void StoreTriangle(ssgLeaf* l, int indx, sgVec3 vv1, sgVec3 vv2, sgVec3 vv3);
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int GetHash (float x, float y)
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{
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int m1; int n1;
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GetRowCol(x,y,&m1,&n1);
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return GetHash(m1, n1);
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}
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int GetHash (int m1, int n1 ) { return m1+n1*m_m; }
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void GetRowCol(float x, float y, int *m1, int *n1)
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{
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*m1=(int)((x-m_x_min)*m_invdx);
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*n1=(int)((y-m_y_min)*m_invdy);
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}
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public:
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StaticSSG(ssgEntity* start, int n);
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void Draw(ssgBranch* b);
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float hot(sgVec3 start, sgVec3 end, ssgLeaf** l, sgVec4** nrm);
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int collision(sgSphere *s, AllHits *allHits);
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};
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#endif
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