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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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#ifndef plCullPoly_inc
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#define plCullPoly_inc
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#include "hsTemplates.h"
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#include "hsGeometry3.h"
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#include "hsBitVector.h"
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class hsStream;
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class hsResMgr;
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struct hsMatrix44;
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const hsScalar kCullPolyDegen = 1.e-4f;
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class plCullPoly
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{
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public:
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enum {
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kNone = 0x0,
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kHole = 0x1,
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kTwoSided = 0x2
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};
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UInt32 fFlags;
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mutable hsBitVector fClipped; // fClipped[i] => edge(fVerts[i], fVerts[(i+1)%n])
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hsTArray<hsPoint3> fVerts;
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hsVector3 fNorm;
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hsScalar fDist;
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hsPoint3 fCenter;
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hsScalar fRadius;
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const hsPoint3& GetCenter() const { return fCenter; }
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hsScalar GetRadius() const { return fRadius; }
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void SetHole(hsBool on) { if( on )fFlags |= kHole; else fFlags &= ~kHole; }
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void SetTwoSided(hsBool on) { if( on )fFlags |= kTwoSided; else fFlags &= ~kTwoSided; }
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hsBool IsHole() const { return fFlags & kHole; } // Assumes kHole is 0x1
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hsBool IsTwoSided() const { return 0 != (fFlags & kTwoSided); }
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plCullPoly& Init(const plCullPoly& p) { fClipped.Clear(); fVerts.SetCount(0); fFlags = p.fFlags; fNorm = p.fNorm; fDist = p.fDist; fCenter = p.fCenter; return *this; }
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plCullPoly& Flip(const plCullPoly& p);
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plCullPoly& InitFromVerts(UInt32 f=kNone);
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hsScalar ICalcRadius() const;
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plCullPoly& Transform(const hsMatrix44& l2w, const hsMatrix44& w2l, plCullPoly& dst) const;
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void Read(hsStream* s, hsResMgr* mgr);
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void Write(hsStream* s, hsResMgr* mgr);
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hsBool DegenerateVert(const hsPoint3& p) const { return fVerts.GetCount() && (kCullPolyDegen > hsVector3(&p, &fVerts[fVerts.GetCount()-1]).MagnitudeSquared()); }
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hsBool Validate() const; // no-op, except for special debugging circumstances.
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};
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#endif // plCullPoly_inc
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