453 lines
12 KiB
C++
453 lines
12 KiB
C++
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//-----------------------------------------------------------------------------+
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// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
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// = FileName : TArcWallUnit.cpp
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// = Version : ver2.0
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// = Author : xlc
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// = CreateDate : 2002-09-09
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// = Description: 类的定义
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// = Maintainers:
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//
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//-----------------------------------------------------------------------------+
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#include "StdAfx.h"
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#include "TArcWallUnit.h"
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#include "TGGeTrianglePface.h"
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#include "TchPrivateGlobalFunc.h"
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static int CompareDouble(double x1, double x2)
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{
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if (fabs(x1 - x2) < _DIST_SNAP)
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{
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return 0;
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}
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if (x1 < x2)
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{
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return -1;
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}
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return 1;
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}
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static int ComparePointByX(const TADSGePoint3d *p1, const TADSGePoint3d *p2)
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{
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if (fabs(p1->x - p2->x) < _DIST_SNAP)
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{
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return 0;
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}
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if (p1->x < p2->x)
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{
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return -1;
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}
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return 1;
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}
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TArcWallUnit::TArcWallUnit()
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: lstHoles(FALSE),xWallBeg(0),xHoleBeg(0),xHoleEnd(0),nRadius(0)
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{
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}
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TArcWallUnit::TArcWallUnit(double rad, double wBeg, double hBeg, double hEnd)
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: lstHoles(FALSE), nRadius(rad), xWallBeg(wBeg), xHoleBeg(hBeg), xHoleEnd(hEnd)
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{
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}
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TArcWallUnit::~TArcWallUnit()
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{
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}
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// 对一系列3dface进行镶嵌
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// 对lstFaces，根据xBeg开始，以nStep的步长进行num次镶嵌
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// 结果存入lstSectFaces，lstFaces在镶嵌后扣除
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void TArcWallUnit::Tessellate(double xBeg, double nStep, int num, TDPtrList<TGGe3DFace> &lstFaces, TDPtrList<TGGe3DFace> &lstSectFaces)
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{
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for(int n = 0; n < num; n++)
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{
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double xSect = xBeg + (1 + n) * nStep; //切割位置
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int nFaceNum = lstFaces.Length();
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for(int k = 0; k<nFaceNum; k++)
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{
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TGGe3DFace &face = *lstFaces[k];
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if (face.GetFlag() & FLAG_TRIANGLE)
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{
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//3角形
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int nFlag1 = CompareDouble(face.GetVertex(0).x, xSect);
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int nFlag2 = CompareDouble(face.GetVertex(1).x, xSect);
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int nFlag3 = CompareDouble(face.GetVertex(2).x, xSect);
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if (nFlag3 <= 0)
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{
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lstSectFaces.Append(new TGGe3DFace(face));
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lstFaces.Remove(k);
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k--;
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nFaceNum--;
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}
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else if (nFlag1 >= 0)
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{
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//无切割发生
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}
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else
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{
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//发生切割
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double x1 = face.GetVertex(0).x, x2 = face.GetVertex(1).x, x3 = face.GetVertex(2).x;
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double y1 = face.GetVertex(0).y, y2 = face.GetVertex(1).y, y3 = face.GetVertex(2).y;
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double x = xSect;
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TGGe3DFace *newFace = new TGGe3DFace(face);
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int nFlag = face.GetFlag();
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int nFlagNew = newFace->GetFlag();
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if (nFlag2 > 0)
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{ //切割第一点, 三角形 ＋ 四边形
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nFlagNew |= 0x02 + 0x08;
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double y = ((x-x1) * y2 + y1 * (x2-x)) / (x2-x1);
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newFace->SetVertex(1, TADSGePoint3d(x, y));
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y = ((x-x1) * y3 + y1 * (x3-x)) / (x3-x1);
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newFace->SetVertex(2, TADSGePoint3d(x, y));
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face.SetVertex(0, newFace->GetVertex(1));
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face.SetVertex(3, newFace->GetVertex(2));
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nFlag |= 0x08;
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nFlag &= ~FLAG_TRIANGLE;
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}
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else if (nFlag2 == 0)
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{ // 三角形＋三角形
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nFlagNew |= 0x02 + 0x08;
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double y = ((x - x1) * y3 + y1 * (x3 - x)) / (x3 - x1);
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newFace->SetVertex(2, TADSGePoint3d(x, y));
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nFlag |= 0x01 + 0x08;
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face.SetVertex(0, TADSGePoint3d(x, y));
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face.SetVertex(3, TADSGePoint3d(x, y));
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}
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else
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{ // 四边形 ＋ 三角形
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double y = ((x - x3) * y2 + y3 * (x2 - x)) / (x2 - x3);
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nFlagNew |= 0x04;
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newFace->SetVertex(2, TADSGePoint3d(x,y));
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y = ((x - x1) * y3 + y1 * (x3 - x)) / (x3 - x1);
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newFace->SetVertex(3, TADSGePoint3d(x,y));
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if (nFlag & 0x04)
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{
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nFlagNew |= 0x08;
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}
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else
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{
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nFlagNew &= ~0x08;
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}
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face.SetVertex(0, newFace->GetVertex(3));
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face.SetVertex(3, newFace->GetVertex(3));
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face.SetVertex(1, newFace->GetVertex(2));
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nFlag |= 0x01 + 0x08;
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}
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face.SetFlag(nFlag);
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newFace->SetFlag(nFlagNew);
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lstSectFaces.Append(newFace);
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}
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}
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else
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{
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//4边形，已经切割过
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int nFlag2 = CompareDouble(face.GetVertex(1).x, xSect);
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int nFlag3 = CompareDouble(face.GetVertex(2).x, xSect);
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// 分4种情况
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if (nFlag3 <= 0)
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{ //整个输出
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lstSectFaces.Append(new TGGe3DFace(face));
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lstFaces.Remove(k);
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k--;
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nFaceNum--;
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}
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else
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{
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double x1 = face.GetVertex(0).x,
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x2 = face.GetVertex(1).x,
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x3 = face.GetVertex(2).x,
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x4 = face.GetVertex(3).x;
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double y1 = face.GetVertex(0).y,
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y2 = face.GetVertex(1).y,
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y3 = face.GetVertex(2).y,
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y4 = face.GetVertex(3).y;
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double x = xSect;
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TGGe3DFace *newFace = new TGGe3DFace(face);
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int nFlag = face.GetFlag();
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int nFlagNew = newFace->GetFlag();
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if (nFlag2 > 0)
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{ // 2个四边形
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nFlagNew |= 0x02;
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double y = ((x - x1) * y2 + y1 * (x2 - x)) / (x2 - x1);
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newFace->SetVertex(1, TADSGePoint3d(x, y));
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y = ((x - x3) * y4 + y3 * (x4 - x)) / (x4 - x3);
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newFace->SetVertex(2, TADSGePoint3d(x, y));
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face.SetVertex(0, newFace->GetVertex(1));
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face.SetVertex(3, newFace->GetVertex(2));
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}
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else if (nFlag2 == 0)
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{ // 4边形＋三角形
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nFlagNew |= 0x02;
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double y = ((x - x3) * y4 + y3 * (x4 - x)) / (x4 - x3);
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newFace->SetVertex(2, TADSGePoint3d(x, y));
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face.SetVertex(0, TADSGePoint3d(x, y));
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face.SetVertex(3, TADSGePoint3d(x, y));
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nFlag |= 0x01 + 0x08;
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nFlag |= FLAG_TRIANGLE;
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}
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else if (nFlag2 < 0)
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{ // 5边形＋三角形
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double y = ((x - x3) * y2 + y3 * (x2 - x)) / (x2 - x3);
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double yy = ((x - x3) * y4 + y3 * (x4 - x)) / (x4 - x3);
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newFace->SetVertex(2, TADSGePoint3d(x, yy));
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nFlagNew |= 0x02;
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TGGe3DFace *pp = new TGGe3DFace(face);
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pp->SetVertex(0, TADSGePoint3d(x, yy));
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pp->SetVertex(3, TADSGePoint3d(x, yy));
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pp->SetVertex(2, TADSGePoint3d(x, y));
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int nFlagP = pp->GetFlag();
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nFlagP |= 0x01 + 0x04 + 0x08;
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pp->SetFlag(nFlagP);
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lstSectFaces.Append(pp);
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face.SetVertex(0, TADSGePoint3d(x, yy));
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face.SetVertex(3, TADSGePoint3d(x, yy));
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nFlag |= 0x01;
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nFlag |= FLAG_TRIANGLE;
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face.SetVertex(1, TADSGePoint3d(x, y));
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}
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face.SetFlag(nFlag);
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newFace->SetFlag(nFlagNew);
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lstSectFaces.Append(newFace);
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}
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} // end if Triangle
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} // end for k
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} // end for n
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}
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void TArcWallUnit::Tessellate(TDPtrList<TGGe3DFace> &lstSectFaces, double nHeight,
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BOOL bHasTop, BOOL bHasBot, BOOL bHasLeft, BOOL bHasRight)
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{
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double xMin = xHoleBeg, xMax = xHoleEnd;
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double xBeg = xWallBeg;
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int nCirDiv = GetCirDivNum(nRadius, _AS_SYS_UNIT(g_nCirDeviation)); //整圆的分段数目
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//1. 输出xBeg~xMin的一段墙(四边形)
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if (xMin-xBeg > _DIST_SNAP)
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{
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int nDivNum = AS_INT((xMin - xBeg) / (2.0 * PI * nRadius) * nCirDiv);
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nDivNum = max(1, nDivNum);
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double nStep = (xMin - xBeg) / nDivNum;
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Tessellate(lstSectFaces, xBeg, nStep, nDivNum, nHeight,
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bHasTop, bHasBot, bHasLeft, (bHasRight && (xMax - xMin) < _DIST_SNAP));
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}
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if (xMax - xMin < _DIST_SNAP)
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{
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return;
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}
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//2. 输出xMin~xMax的一段墙（包含洞口)
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TGGePolygonEx polyOut; //外轮廓－展开坐标系
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polyOut.AppendNode(TADSGePoint3d(xMin,0), bHasBot);
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polyOut.AppendNode(TADSGePoint3d(xMax, 0), bHasRight);
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polyOut.AppendNode(TADSGePoint3d(xMax, nHeight), bHasTop);
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polyOut.AppendNode(TADSGePoint3d(xMin, nHeight), (bHasLeft && fabs(xMin - xBeg) < _DIST_SNAP));
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//在展开坐标系，分解为三角形
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TDPtrList<TGGe3DFace> lstFaces;
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AsTriangleFaces(polyOut, lstHoles, lstFaces);
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// 根据x坐标排序顶点（可能导致顺时针顶点方向）
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for(int i = 0; i < lstFaces.Length(); i++)
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{
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TGGe3DFace *pFace = lstFaces[i];
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SortVertex(pFace);
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}
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//3. 在展开坐标系，用分弧精度切割三角形，形成三角形或4边形
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int num = AS_INT((xMax - xMin) / (2.0 * PI * nRadius) * nCirDiv);
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num = max(1, num);
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double nStep = (xMax - xMin) / num;
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Tessellate(xMin, nStep, num, lstFaces, lstSectFaces);
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}
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// 对xBeg开始，以步长nStep共nDivNum步，高度为nHeight，进行镶嵌，
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// 结果存入lstSectFaces。bHasTop, bHasBot, bHasLeft, bHasRight，外围边的可见性
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void TArcWallUnit::Tessellate(TDPtrList<TGGe3DFace> &lstSectFaces, double xBeg, double nStep, int nDivNum, double nHeight,
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BOOL bHasTop, BOOL bHasBot, BOOL bHasLeft, BOOL bHasRight)
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{
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double nPrev = xBeg;
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for (int n = 1; n <= nDivNum; n++)
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{
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double nNext = xBeg + n * nStep;
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TGGe3DFace *pFace = new TGGe3DFace;
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int nFlag = pFace->GetFlag();
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// 底－右－顶－左
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if (!bHasBot)
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{
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nFlag |= 0x01;
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}
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if (bHasRight && n == nDivNum)
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{
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;
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}
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else
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{
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nFlag |= 0x02;
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}
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if (!bHasTop)
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{
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nFlag |= 0x04;
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}
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if (bHasLeft && n == 1)
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{
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;
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}
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else
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{
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nFlag |= 0x08;
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}
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pFace->SetFlag(nFlag);
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pFace->SetVertex(0, TADSGePoint3d(nPrev, 0.0));
|
|||
|
|
pFace->SetVertex(1, TADSGePoint3d(nNext, 0.0));
|
|||
|
|
pFace->SetVertex(2, TADSGePoint3d(nNext, nHeight));
|
|||
|
|
pFace->SetVertex(3, TADSGePoint3d(nPrev, nHeight));
|
|||
|
|
lstSectFaces.Append(pFace);
|
|||
|
|
|
|||
|
|
nPrev = nNext;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 把平面（含洞口）的模型，化解为三角形
|
|||
|
|
// z坐标全部为0
|
|||
|
|
int TArcWallUnit::AsTriangleFaces(const TGGePolygonEx &polyOut, const TDPtrList<TGGePoly2D> &lstHoles, TDPtrList<TGGe3DFace> &lstFaces)
|
|||
|
|
{
|
|||
|
|
TGGeTrianglePface lstTris;
|
|||
|
|
|
|||
|
|
if (Triangulate(polyOut, lstHoles, lstTris))
|
|||
|
|
{
|
|||
|
|
int nFlag = 0;
|
|||
|
|
for (int n = 0; n < lstTris.Length(); n++)
|
|||
|
|
{
|
|||
|
|
TGGeTriangle *triangle = lstTris[n];
|
|||
|
|
ASSERT(triangle);
|
|||
|
|
|
|||
|
|
TGGe3DFace *pFace = new TGGe3DFace;
|
|||
|
|
nFlag = triangle->m_nFlag;
|
|||
|
|
pFace->SetVertex(0, triangle->vertex1);
|
|||
|
|
pFace->SetVertex(1, triangle->vertex2);
|
|||
|
|
pFace->SetVertex(2, triangle->vertex3);
|
|||
|
|
pFace->SetVertex(3, triangle->vertex1);
|
|||
|
|
nFlag |= FLAG_TRIANGLE;
|
|||
|
|
pFace->SetFlag(nFlag);
|
|||
|
|
lstFaces.Append(pFace);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return RTNORM;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return RTERROR;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 把平面（含洞口）的模型，化解为三角形
|
|||
|
|
// z坐标全部为0
|
|||
|
|
int TArcWallUnit::AsTriangleFaces(const TGGePoly2D &polyOut, const TDPtrList<TGGePoly2D> &lstHoles, TDPtrList<TGGe3DFace> &lstFaces)
|
|||
|
|
{
|
|||
|
|
TGGePoly poly1;
|
|||
|
|
((TGGePoly2D &)polyOut).MapToPolygon1(poly1, _AS_SYS_UNIT(g_nCirDeviation));
|
|||
|
|
|
|||
|
|
ASSERT(poly1.Length() > 2);
|
|||
|
|
|
|||
|
|
TGGePolygonEx polyEx1(poly1);
|
|||
|
|
if (polyEx1.PathArea() > 0.0)
|
|||
|
|
{
|
|||
|
|
polyEx1.Reverse();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return AsTriangleFaces(polyEx1, lstHoles, lstFaces);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void TArcWallUnit::SortVertex(TGGe3DFace *pFace)
|
|||
|
|
{
|
|||
|
|
ASSERT(pFace);
|
|||
|
|
|
|||
|
|
TDPtrList<TADSGePoint3d> vertices;
|
|||
|
|
BOOL bInvis1 = ((pFace->GetFlag() & 0x01) != 0);
|
|||
|
|
BOOL bInvis2 = ((pFace->GetFlag() & 0x02) != 0);
|
|||
|
|
BOOL bInvis3 = ((pFace->GetFlag() & 0x04) != 0);
|
|||
|
|
|
|||
|
|
vertices.Append(new TADSGePoint3d(pFace->GetVertex(0).x, pFace->GetVertex(0).y, bInvis1));
|
|||
|
|
vertices.Append(new TADSGePoint3d(pFace->GetVertex(1).x, pFace->GetVertex(1).y, bInvis2));
|
|||
|
|
vertices.Append(new TADSGePoint3d(pFace->GetVertex(2).x, pFace->GetVertex(2).y, bInvis3));
|
|||
|
|
vertices.QuickSort(ComparePointByX);
|
|||
|
|
|
|||
|
|
TADSGePoint3d ver0 = *vertices[0], ver1 = *vertices[1], ver2 = *vertices[2];
|
|||
|
|
|
|||
|
|
TVector3D vtOld = pFace->GetNormal();
|
|||
|
|
pFace->GetVertex(0).x = ver0.x;
|
|||
|
|
pFace->GetVertex(0).y = ver0.y;
|
|||
|
|
pFace->GetVertex(1).x = ver1.x;
|
|||
|
|
pFace->GetVertex(1).y = ver1.y;
|
|||
|
|
pFace->GetVertex(2).x = ver2.x;
|
|||
|
|
pFace->GetVertex(2).y = ver2.y;
|
|||
|
|
pFace->GetVertex(3) = pFace->GetVertex(0);
|
|||
|
|
|
|||
|
|
bInvis1 = (ver0.z > 1.0E-3);
|
|||
|
|
bInvis2 = (ver1.z > 1.0E-3);
|
|||
|
|
bInvis3 = (ver2.z > 1.0E-3);
|
|||
|
|
|
|||
|
|
TVector3D vtNew = pFace->GetNormal();
|
|||
|
|
if ((vtNew & vtOld) < 0)
|
|||
|
|
{
|
|||
|
|
// 可见标记也要反转
|
|||
|
|
BOOL b1 = bInvis1, b2 = bInvis2, b3 = bInvis3;
|
|||
|
|
bInvis1 = b2;
|
|||
|
|
bInvis2 = b3;
|
|||
|
|
bInvis3 = b1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
int nFlag = pFace->GetFlag();
|
|||
|
|
if (bInvis1)
|
|||
|
|
{
|
|||
|
|
nFlag |= 0x01;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
nFlag &= ~0x01;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (bInvis2)
|
|||
|
|
{
|
|||
|
|
nFlag |= 0x02;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
nFlag &= ~0x02;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (bInvis3)
|
|||
|
|
{
|
|||
|
|
nFlag |= 0x04;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
nFlag &= ~0x04;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
pFace->SetFlag(nFlag);
|
|||
|
|
}
|