mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-15 10:28:34 +05:00
527 lines
10 KiB
C++
527 lines
10 KiB
C++
#include <mystdlib.h>
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#include <linalg.hpp>
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#include <csg.hpp>
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namespace netgen
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{
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Parallelogram3d :: Parallelogram3d (Point<3> ap1, Point<3> ap2, Point<3> ap3)
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{
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p1 = ap1;
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p2 = ap2;
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p3 = ap3;
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CalcData();
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}
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Parallelogram3d ::~Parallelogram3d ()
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{
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;
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}
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void Parallelogram3d :: SetPoints (Point<3> ap1,
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Point<3> ap2,
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Point<3> ap3)
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{
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p1 = ap1;
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p2 = ap2;
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p3 = ap3;
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CalcData();
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}
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void Parallelogram3d :: CalcData()
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{
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v12 = p2 - p1;
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v13 = p3 - p1;
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p4 = p2 + v13;
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n = Cross (v12, v13);
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n.Normalize();
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}
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int Parallelogram3d ::
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IsIdentic (const Surface & s2, int & inv, double eps) const
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{
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int id =
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(fabs (s2.CalcFunctionValue (p1)) <= eps) &&
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(fabs (s2.CalcFunctionValue (p2)) <= eps) &&
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(fabs (s2.CalcFunctionValue (p3)) <= eps);
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if (id)
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{
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Vec<3> n2;
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n2 = s2.GetNormalVector(p1);
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inv = (n * n2) < 0;
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}
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return id;
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}
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double Parallelogram3d :: CalcFunctionValue (const Point<3> & point) const
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{
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return n * (point - p1);
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}
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void Parallelogram3d :: CalcGradient (const Point<3> & /* point */,
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Vec<3> & grad) const
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{
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grad = n;
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}
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void Parallelogram3d :: CalcHesse (const Point<3> & /* point */, Mat<3> & hesse) const
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{
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hesse = 0;
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}
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double Parallelogram3d :: HesseNorm () const
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{
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return 0;
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}
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Point<3> Parallelogram3d :: GetSurfacePoint () const
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{
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return p1;
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}
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void Parallelogram3d :: Print (ostream & str) const
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{
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str << "Parallelogram3d " << p1 << " - " << p2 << " - " << p3 << endl;
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}
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void Parallelogram3d ::
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GetTriangleApproximation (TriangleApproximation & tas,
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const Box<3> & /* bbox */,
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double /* facets */) const
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{
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tas.AddPoint (p1);
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tas.AddPoint (p2);
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tas.AddPoint (p3);
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tas.AddPoint (p4);
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tas.AddTriangle (TATriangle (0, 0, 1, 2));
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tas.AddTriangle (TATriangle (0, 2, 1, 3));
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}
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Brick :: Brick (Point<3> ap1, Point<3> ap2,
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Point<3> ap3, Point<3> ap4)
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{
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faces.SetSize (6);
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surfaceids.SetSize (6);
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surfaceactive.SetSize(6);
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p1 = ap1; p2 = ap2;
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p3 = ap3; p4 = ap4;
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for (int i = 0; i < 6; i++)
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{
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faces[i] = new Plane (Point<3>(0,0,0), Vec<3> (0,0,1));
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surfaceactive[i] = 1;
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}
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CalcData();
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}
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Brick :: ~Brick ()
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{
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for (int i = 0; i < 6; i++)
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delete faces[i];
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}
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Primitive * Brick :: CreateDefault ()
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{
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return new Brick (Point<3> (0,0,0),
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Point<3> (1,0,0),
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Point<3> (0,1,0),
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Point<3> (0,0,1));
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}
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Primitive * Brick :: Copy () const
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{
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return new Brick (p1, p2, p3, p4);
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}
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void Brick :: Transform (Transformation<3> & trans)
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{
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trans.Transform (p1);
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trans.Transform (p2);
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trans.Transform (p3);
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trans.Transform (p4);
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CalcData();
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}
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INSOLID_TYPE Brick :: BoxInSolid (const BoxSphere<3> & box) const
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{
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/*
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int i;
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double maxval;
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for (i = 1; i <= 6; i++)
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{
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double val = faces.Get(i)->CalcFunctionValue (box.Center());
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if (i == 1 || val > maxval)
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maxval = val;
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}
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if (maxval > box.Diam()) return IS_OUTSIDE;
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if (maxval < -box.Diam()) return IS_INSIDE;
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return DOES_INTERSECT;
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*/
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bool inside = 1;
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bool outside = 0;
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Point<3> p[8];
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for (int j = 0; j < 8; j++)
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p[j] = box.GetPointNr(j);
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for (int i = 0; i < 6; i++)
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{
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bool outsidei = 1;
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for (int j = 0; j < 8; j++)
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{
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// Point<3> p = box.GetPointNr (j);
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double val = faces[i]->Plane::CalcFunctionValue (p[j]);
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if (val > 0) inside = 0;
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if (val < 0) outsidei = 0;
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}
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if (outsidei) outside = 1;
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}
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if (outside) return IS_OUTSIDE;
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if (inside) return IS_INSIDE;
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return DOES_INTERSECT;
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}
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INSOLID_TYPE Brick :: PointInSolid (const Point<3> & p,
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double eps) const
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{
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double maxval = faces[0] -> Plane::CalcFunctionValue (p);
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for (int i = 1; i < 6; i++)
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{
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double val = faces[i] -> Plane::CalcFunctionValue (p);
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if (val > maxval) maxval = val;
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}
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if (maxval > eps) return IS_OUTSIDE;
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if (maxval < -eps) return IS_INSIDE;
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return DOES_INTERSECT;
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}
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INSOLID_TYPE Brick :: VecInSolid (const Point<3> & p,
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const Vec<3> & v,
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double eps) const
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{
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INSOLID_TYPE result = IS_INSIDE;
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for (int i = 0; i < faces.Size(); i++)
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{
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INSOLID_TYPE hres = faces[i]->VecInSolid(p, v, eps);
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if (hres == IS_OUTSIDE || result == IS_OUTSIDE) result = IS_OUTSIDE;
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else if (hres == DOES_INTERSECT || result == DOES_INTERSECT) result = DOES_INTERSECT;
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else result = IS_INSIDE;
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}
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return result;
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/*
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INSOLID_TYPE is = IS_INSIDE;
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Vec<3> grad;
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double scal;
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for (int i = 0; i < faces.Size(); i++)
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{
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if (faces[i] -> PointOnSurface (p, eps))
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{
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GetSurface(i).CalcGradient (p, grad);
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scal = v * grad;
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if (scal >= eps)
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is = IS_OUTSIDE;
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if (scal >= -eps && is == IS_INSIDE)
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is = DOES_INTERSECT;
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}
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}
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return is;
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*/
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/*
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Point<3> p2 = p + 1e-2 * v;
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return PointInSolid (p2, eps);
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*/
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}
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INSOLID_TYPE Brick :: VecInSolid2 (const Point<3> & p,
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const Vec<3> & v1,
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const Vec<3> & v2,
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double eps) const
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{
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INSOLID_TYPE result = IS_INSIDE;
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for (int i = 0; i < faces.Size(); i++)
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{
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INSOLID_TYPE hres = faces[i]->VecInSolid2(p, v1, v2, eps);
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if (hres == IS_OUTSIDE || result == IS_OUTSIDE) result = IS_OUTSIDE;
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else if (hres == DOES_INTERSECT || result == DOES_INTERSECT) result = DOES_INTERSECT;
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else result = IS_INSIDE;
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}
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return result;
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}
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INSOLID_TYPE Brick :: VecInSolid3 (const Point<3> & p,
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const Vec<3> & v1,
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const Vec<3> & v2,
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double eps) const
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{
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INSOLID_TYPE result = IS_INSIDE;
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for (int i = 0; i < faces.Size(); i++)
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{
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INSOLID_TYPE hres = faces[i]->VecInSolid3(p, v1, v2, eps);
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if (hres == IS_OUTSIDE || result == IS_OUTSIDE) result = IS_OUTSIDE;
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else if (hres == DOES_INTERSECT || result == DOES_INTERSECT) result = DOES_INTERSECT;
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else result = IS_INSIDE;
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}
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return result;
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}
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INSOLID_TYPE Brick :: VecInSolid4 (const Point<3> & p,
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const Vec<3> & v,
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const Vec<3> & v2,
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const Vec<3> & m,
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double eps) const
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{
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INSOLID_TYPE result = IS_INSIDE;
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for (int i = 0; i < faces.Size(); i++)
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{
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INSOLID_TYPE hres = faces[i]->VecInSolid4(p, v, v2, m, eps);
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if (hres == IS_OUTSIDE || result == IS_OUTSIDE) result = IS_OUTSIDE;
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else if (hres == DOES_INTERSECT || result == DOES_INTERSECT) result = DOES_INTERSECT;
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else result = IS_INSIDE;
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}
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return result;
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}
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void Brick ::
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GetPrimitiveData (const char *& classname, Array<double> & coeffs) const
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{
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classname = "brick";
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coeffs.SetSize(12);
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coeffs.Elem(1) = p1(0);
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coeffs.Elem(2) = p1(1);
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coeffs.Elem(3) = p1(2);
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coeffs.Elem(4) = p2(0);
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coeffs.Elem(5) = p2(1);
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coeffs.Elem(6) = p2(2);
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coeffs.Elem(7) = p3(0);
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coeffs.Elem(8) = p3(1);
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coeffs.Elem(9) = p3(2);
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coeffs.Elem(10) = p4(0);
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coeffs.Elem(11) = p4(1);
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coeffs.Elem(12) = p4(2);
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}
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void Brick :: SetPrimitiveData (Array<double> & coeffs)
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{
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p1(0) = coeffs.Elem(1);
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p1(1) = coeffs.Elem(2);
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p1(2) = coeffs.Elem(3);
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p2(0) = coeffs.Elem(4);
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p2(1) = coeffs.Elem(5);
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p2(2) = coeffs.Elem(6);
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p3(0) = coeffs.Elem(7);
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p3(1) = coeffs.Elem(8);
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p3(2) = coeffs.Elem(9);
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p4(0) = coeffs.Elem(10);
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p4(1) = coeffs.Elem(11);
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p4(2) = coeffs.Elem(12);
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CalcData();
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}
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void Brick :: CalcData()
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{
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v12 = p2 - p1;
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v13 = p3 - p1;
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v14 = p4 - p1;
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Point<3> pi[8];
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int i1, i2, i3;
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int i, j;
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i = 0;
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for (i3 = 0; i3 <= 1; i3++)
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for (i2 = 0; i2 <= 1; i2++)
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for (i1 = 0; i1 <= 1; i1++)
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{
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pi[i] = p1 + i1 * v12 + i2 * v13 + i3 * v14;
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i++;
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}
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static int lface[6][4] =
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{ { 1, 3, 2, 4 },
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{ 5, 6, 7, 8 },
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{ 1, 2, 5, 6 },
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{ 3, 7, 4, 8 },
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{ 1, 5, 3, 7 },
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{ 2, 4, 6, 8 } };
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Array<double> data(6);
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for (i = 0; i < 6; i++)
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{
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const Point<3> lp1 = pi[lface[i][0]-1];
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const Point<3> lp2 = pi[lface[i][1]-1];
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const Point<3> lp3 = pi[lface[i][2]-1];
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Vec<3> n = Cross ((lp2-lp1), (lp3-lp1));
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n.Normalize();
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for (j = 0; j < 3; j++)
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{
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data[j] = lp1(j);
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data[j+3] = n(j);
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}
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faces[i] -> SetPrimitiveData (data);
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/*
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{
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faces.Elem(i+1) -> SetPoints
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(pi[lface[i][0]-1],
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pi[lface[i][1]-1],
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pi[lface[i][2]-1]);
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}
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*/
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}
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}
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void Brick :: Reduce (const BoxSphere<3> & box)
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{
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double val;
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// Point<3> p;
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Point<3> p[8];
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for(int j=0;j<8;j++)
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p[j]=box.GetPointNr(j);
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for (int i = 0; i < 6; i++)
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{
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bool hasout = 0;
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bool hasin = 0;
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for (int j = 0; j < 8; j++)
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{
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// p = box.GetPointNr (j);
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val = faces[i]->Plane::CalcFunctionValue (p[j]);
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if (val > 0) hasout = 1;
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else if (val < 0) hasin = 1;
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if (hasout && hasin) break;
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}
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surfaceactive[i] = hasout && hasin;
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}
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}
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void Brick :: UnReduce ()
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{
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for (int i = 0; i < 6; i++)
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surfaceactive[i] = 1;
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}
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OrthoBrick :: OrthoBrick (const Point<3> & ap1, const Point<3> & ap2)
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: Brick (ap1,
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Point<3> (ap2(0), ap1(1), ap1(2)),
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Point<3> (ap1(0), ap2(1), ap1(2)),
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Point<3> (ap1(0), ap1(1), ap2(2)))
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{
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pmin = ap1;
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pmax = ap2;
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}
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INSOLID_TYPE OrthoBrick :: BoxInSolid (const BoxSphere<3> & box) const
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{
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if (pmin(0) > box.PMax()(0) ||
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pmin(1) > box.PMax()(1) ||
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pmin(2) > box.PMax()(2) ||
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pmax(0) < box.PMin()(0) ||
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pmax(1) < box.PMin()(1) ||
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pmax(2) < box.PMin()(2))
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return IS_OUTSIDE;
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if (pmin(0) < box.PMin()(0) &&
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pmin(1) < box.PMin()(1) &&
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pmin(2) < box.PMin()(2) &&
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pmax(0) > box.PMax()(0) &&
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pmax(1) > box.PMax()(1) &&
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pmax(2) > box.PMax()(2))
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return IS_INSIDE;
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return DOES_INTERSECT;
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}
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void OrthoBrick :: Reduce (const BoxSphere<3> & box)
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{
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surfaceactive.Elem(1) =
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(box.PMin()(2) < pmin(2)) && (pmin(2) < box.PMax()(2));
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surfaceactive.Elem(2) =
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(box.PMin()(2) < pmax(2)) && (pmax(2) < box.PMax()(2));
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surfaceactive.Elem(3) =
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(box.PMin()(1) < pmin(1)) && (pmin(1) < box.PMax()(1));
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surfaceactive.Elem(4) =
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(box.PMin()(1) < pmax(1)) && (pmax(1) < box.PMax()(1));
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surfaceactive.Elem(5) =
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(box.PMin()(0) < pmin(0)) && (pmin(0) < box.PMax()(0));
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surfaceactive.Elem(6) =
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(box.PMin()(0) < pmax(0)) && (pmax(0) < box.PMax()(0));
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}
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}
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