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486 lines
12 KiB
C++
486 lines
12 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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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 Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include <map>
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#include <vector>
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#include "nel/pacs/collision_mesh_build.h"
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#include "nel/pacs/local_retriever.h"
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#include "nel/pacs/exterior_mesh.h"
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#include "mouline.h"
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#include "build_surfaces.h"
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using namespace std;
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using namespace NLMISC;
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using namespace NLPACS;
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/*
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// a reference on an edge
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struct CEdgeKey
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{
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uint32 V0;
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uint32 V1;
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CEdgeKey() {}
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CEdgeKey(uint32 v0, uint32 v1) : V0(v0), V1(v1) {}
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bool operator() (const CEdgeKey &a, const CEdgeKey &b)
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{
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return a.V0 < b.V0 || (a.V0 == b.V0 && a.V1 < b.V1);
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}
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};
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// the info on an edge
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struct CEdgeInfo
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{
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sint32 Left, LeftEdge;
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sint32 Right, RightEdge;
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CEdgeInfo(sint32 left=-1, sint32 leftEdge=-1, sint32 right=-1, sint32 rightEdge=-1) : Left(left), LeftEdge(leftEdge), Right(right), RightEdge(rightEdge) {}
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};
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typedef map<CEdgeKey, CEdgeInfo, CEdgeKey> TLinkRelloc;
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typedef TLinkRelloc::iterator ItTLinkRelloc;
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//
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void linkMesh(CCollisionMeshBuild &cmb, bool linkInterior)
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{
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uint i, j;
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TLinkRelloc relloc;
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// check each edge of each face
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for (i=0; i<cmb.Faces.size(); ++i)
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{
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if (cmb.Faces[i].Surface == CCollisionFace::ExteriorSurface && linkInterior ||
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cmb.Faces[i].Surface >= CCollisionFace::InteriorSurfaceFirst && !linkInterior)
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continue;
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for (j=0; j<3; ++j)
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{
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cmb.Faces[i].Edge[j] = -1;
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uint edge = (j+2)%3;
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uint32 va = cmb.Faces[i].V[j],
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vb = cmb.Faces[i].V[(j+1)%3];
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ItTLinkRelloc it;
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if ((it = relloc.find(CEdgeKey(va, vb))) != relloc.end())
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{
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// in this case, the left triangle of the edge has already been found.
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// should throw an error
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nlerror("On face %d, edge %d: left side of edge (%d,%d) already linked to face %d",
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i, edge, va, vb, (*it).second.Left);
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}
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else if ((it = relloc.find(CEdgeKey(vb, va))) != relloc.end())
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{
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// in this case, we must check the right face has been set yet
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if ((*it).second.Right != -1)
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{
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nlerror("On face %d, edge %d: right side of edge (%d,%d) already linked to face %d",
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i, edge, vb, va, (*it).second.Right);
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}
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(*it).second.Right = i;
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(*it).second.RightEdge = edge;
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}
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else
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{
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// if the edge wasn't present yet, create it and set it up.
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relloc.insert(make_pair(CEdgeKey(va, vb), CEdgeInfo(i, edge, -1, -1)));
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}
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}
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}
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// for each checked edge, update the edge info inside the faces
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ItTLinkRelloc it;
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for (it=relloc.begin(); it!=relloc.end(); ++it)
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{
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sint32 left, leftEdge;
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sint32 right, rightEdge;
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// get the link info on the edge
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left = (*it).second.Left;
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leftEdge = (*it).second.LeftEdge;
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right = (*it).second.Right;
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rightEdge = (*it).second.RightEdge;
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// update both faces
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if (left != -1)
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cmb.Faces[left].Edge[leftEdge] = right;
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if (right != -1)
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cmb.Faces[right].Edge[rightEdge] = left;
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}
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}
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*/
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void buildExteriorMesh(CCollisionMeshBuild &cmb, CExteriorMesh &em)
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{
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uint startFace = 0;
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vector<CExteriorMesh::CEdge> edges;
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uint i;
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for (i=0; i<cmb.Faces.size(); ++i)
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{
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cmb.Faces[i].EdgeFlags[0] = false;
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cmb.Faces[i].EdgeFlags[1] = false;
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cmb.Faces[i].EdgeFlags[2] = false;
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}
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while (true)
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{
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// find the first non interior face
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uint i, edge;
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bool found = false;
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for (i=startFace; i<cmb.Faces.size() && !found; ++i)
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{
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if (cmb.Faces[i].Surface != CCollisionFace::ExteriorSurface)
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continue;
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for (edge=0; edge<3 && !found; ++edge)
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if (cmb.Faces[i].Edge[edge] == -1 && !cmb.Faces[i].EdgeFlags[edge])
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{
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// nlassert(cmb.Faces[i].Material != 0xdeadbeef);
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found = true;
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break;
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}
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if (found)
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break;
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}
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//
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if (!found)
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break;
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// cmb.Faces[i].Material = 0xdeadbeef;
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startFace = i+1;
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sint32 current = i;
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sint32 next = cmb.Faces[current].Edge[edge];
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sint oedge;
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sint pivot = (edge+1)%3;
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sint nextEdge = edge;
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bool allowThis = true;
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uint numLink = 0;
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uint firstEdge = (uint)edges.size();
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vector<CExteriorMesh::CEdge> loop;
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while (true)
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{
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if (cmb.Faces[current].EdgeFlags[nextEdge])
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{
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// if reaches the end of the border, then quits.
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break;
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}
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else if (next == -1)
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{
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// if the next edge belongs to the border, then go on the same element
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cmb.Faces[current].EdgeFlags[nextEdge] = true;
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/// \todo get the real edge link
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sint link = (cmb.Faces[current].Visibility[nextEdge]) ? -1 : 0; //(numLink++);
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//edges.push_back(CExteriorMesh::CEdge(cmb.Vertices[cmb.Faces[current].V[pivot]], link));
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loop.push_back(CExteriorMesh::CEdge(cmb.Vertices[cmb.Faces[current].V[pivot]], link));
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pivot = (pivot+1)%3;
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nextEdge = (nextEdge+1)%3;
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next = cmb.Faces[current].Edge[nextEdge];
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}
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else
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{
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// if the next element is inside the surface, then go to the next element
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for (oedge=0; oedge<3 && cmb.Faces[next].Edge[oedge]!=current; ++oedge)
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;
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nlassert(oedge != 3);
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current = next;
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pivot = (oedge+2)%3;
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nextEdge = (oedge+1)%3;
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next = cmb.Faces[current].Edge[nextEdge];
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}
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}
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// mark the end of a ext mesh block
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// this way, collisions won't be checked in the pacs engine
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if (loop.size() >= 3)
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{
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uint n = (uint)loop.size();
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while (loop.front().Link >= 0 && loop.back().Link >= 0 && n > 0)
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{
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loop.push_back(loop.front());
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loop.erase(loop.begin());
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--n;
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}
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}
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loop.push_back(loop.front());
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loop.back().Link = -2;
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edges.insert(edges.end(), loop.begin(), loop.end());
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//edges.push_back(edges[firstEdge]);
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//edges.back().Link = -2;
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}
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bool previousWasLink = false;
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sint previousLink = -1;
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for (i=0; i<edges.size(); ++i)
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{
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// nldebug("ext-mesh: vertex=%d (%.2f,%.2f,%.2f) link=%d", i, edges[i].Start.x, edges[i].Start.y, edges[i].Start.z, edges[i].Link);
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if (edges[i].Link >= 0)
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{
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if (!previousWasLink)
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++previousLink;
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edges[i].Link = previousLink;
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previousWasLink = true;
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}
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else
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{
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previousWasLink = false;
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}
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}
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em.setEdges(edges);
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}
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//
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void linkExteriorToInterior(CLocalRetriever &lr)
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{
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CExteriorMesh em = lr.getExteriorMesh();
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vector<CExteriorMesh::CEdge> edges = em.getEdges();
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vector<CExteriorMesh::CLink> links;
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const vector<CChain> &chains = lr.getChains();
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const vector<COrderedChain3f> &ochains = lr.getFullOrderedChains();
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const vector<uint16> &bchains = lr.getBorderChains();
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{
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uint i;
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nlinfo("Border chains (to be linked) for this retriever:");
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for (i=0; i<bchains.size(); ++i)
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{
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static char buf[512], w[256];
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const CChain &chain = chains[bchains[i]];
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sprintf(buf, "Border chain %d: chain=%d ", i, bchains[i]);
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uint och;
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for (och=0; och<chain.getSubChains().size(); ++och)
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{
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const COrderedChain3f &ochain = ochains[chain.getSubChain(och)];
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sprintf(w, "subchain=%d", chain.getSubChain(och));
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strcat(buf, w);
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uint v;
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for (v=0; v<ochain.getVertices().size(); ++v)
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{
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sprintf(w, " (%.2f,%.2f)", ochain[v].x, ochain[v].y);
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strcat(buf, w);
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}
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}
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nlinfo("%s", buf);
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}
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}
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uint edge, ch;
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for (edge=0; edge+1<edges.size(); )
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{
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if (edges[edge].Link == -1 || edges[edge].Link == -2)
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{
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++edge;
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continue;
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}
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uint startedge = edge;
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uint stopedge;
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for (stopedge=edge; stopedge+1<edges.size() && edges[stopedge+1].Link == edges[startedge].Link; ++stopedge)
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;
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edge = stopedge+1;
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CVector start = edges[startedge].Start, stop = edges[stopedge+1].Start;
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bool found = false;
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for (ch=0; ch<bchains.size() && !found; ++ch)
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{
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// get the border chain.
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//const CChain &chain = chains[bchains[ch]];
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const CVector &cstart = lr.getStartVector(bchains[ch]),
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&cstop = lr.getStopVector(bchains[ch]);
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float d = (start-cstart).norm()+(stop-cstop).norm();
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if (d < 1.0e-1f)
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{
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found = true;
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break;
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}
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}
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// create a link
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CExteriorMesh::CLink link;
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if (!found)
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{
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nlwarning("in linkInteriorToExterior():");
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nlwarning("couldn't find any link to the exterior edge %d-%d!!", startedge, stopedge);
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}
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else
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{
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// set it up to point on the chain and surface
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link.BorderChainId = ch;
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link.ChainId = bchains[ch];
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link.SurfaceId = (uint16)chains[link.ChainId].getLeft();
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}
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// enlarge the links
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if (edges[startedge].Link >= (sint)links.size())
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links.resize(edges[startedge].Link+1);
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// if the link already exists, warning
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if (links[edges[startedge].Link].BorderChainId != 0xFFFF ||
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links[edges[startedge].Link].ChainId != 0xFFFF ||
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links[edges[startedge].Link].SurfaceId != 0xFFFF)
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{
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nlwarning("in linkInteriorToExterior():");
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nlwarning("link %d already set!!", edges[startedge].Link);
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}
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// setup the link
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links[edges[startedge].Link] = link;
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}
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// em.setEdges(edges);
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em.setLinks(links);
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lr.setExteriorMesh(em);
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}
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//
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void computeRetriever(CCollisionMeshBuild &cmb, CLocalRetriever &lr, CVector &translation, bool useCmbTrivialTranslation)
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{
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// set the retriever
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lr.setType(CLocalRetriever::Interior);
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// if should use the own cmb bbox, then compute it
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if (useCmbTrivialTranslation)
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{
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translation = cmb.computeTrivialTranslation();
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// snap the translation vector to a meter wide grid
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translation.x = (float)ceil(translation.x);
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translation.y = (float)ceil(translation.y);
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translation.z = 0.0f;
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}
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uint i, j;
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for (i=0; i<cmb.Faces.size(); ++i)
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{
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CVector normal = ((cmb.Vertices[cmb.Faces[i].V[1]]-cmb.Vertices[cmb.Faces[i].V[0]])^(cmb.Vertices[cmb.Faces[i].V[2]]-cmb.Vertices[cmb.Faces[i].V[0]])).normed();
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if (normal.z < 0.0f)
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{
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nlwarning("Face %d in cmb (%s) has negative normal! -- face is flipped", i, cmb.Faces[i].Surface == CCollisionFace::InteriorSurfaceFirst ? "interior" : "exterior");
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/*
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std::swap(cmb.Faces[i].V[1], cmb.Faces[i].V[2]);
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std::swap(cmb.Faces[i].Visibility[1], cmb.Faces[i].Visibility[2]);
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*/
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}
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}
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// first link faces
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/*
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linkMesh(cmb, false);
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linkMesh(cmb, true);
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*/
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vector<string> errors;
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cmb.link(false, errors);
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cmb.link(true, errors);
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if (!errors.empty())
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{
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nlwarning("Edge issues reported !!");
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uint i;
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for (i=0; i<errors.size(); ++i)
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nlwarning("%s", errors[i].c_str());
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nlerror("Can't continue.");
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}
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// translate the meshbuild to the local axis
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cmb.translate(translation);
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// find the exterior mesh border
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CExteriorMesh extMesh;
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buildExteriorMesh(cmb, extMesh);
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lr.setExteriorMesh(extMesh);
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// build the surfaces in the local retriever
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buildSurfaces(cmb, lr);
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// create the snapping faces and vertices
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// after the build surfaces because the InternalSurfaceId is filled within buildSurfaces()...
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buildSnapping(cmb, lr);
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//
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lr.computeLoopsAndTips();
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lr.findBorderChains();
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lr.updateChainIds();
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lr.computeTopologies();
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lr.unify();
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lr.computeCollisionChainQuad();
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/*
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//
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for (i=0; i<lr.getSurfaces().size(); ++i)
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lr.dumpSurface(i);
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*/
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//
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linkExteriorToInterior(lr);
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// compute the bbox of the retriever
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CAABBox bbox;
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bool first = true;
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for (i=0; i<extMesh.getEdges().size(); ++i)
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if (!first)
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bbox.extend(extMesh.getEdge(i).Start);
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else
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bbox.setCenter(extMesh.getEdge(i).Start), first=false;
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for (i=0; i<lr.getOrderedChains().size(); ++i)
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for (j=0; j<lr.getOrderedChain(i).getVertices().size(); ++j)
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if (!first)
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bbox.extend(lr.getOrderedChain(i)[j].unpack3f());
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else
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bbox.setCenter(lr.getOrderedChain(i)[j].unpack3f()), first=false;
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CVector bboxhs = bbox.getHalfSize();
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bboxhs.z = 10000.0f;
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bbox.setHalfSize(bboxhs);
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lr.setBBox(bbox);
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}
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