mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-25 21:40:33 +05:00
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
#ifndef FILE_GEOMTEST3D
|
|
#define FILE_GEOMTEST3D
|
|
|
|
/* *************************************************************************/
|
|
/* File: geomtest3d.hh */
|
|
/* Author: Joachim Schoeberl */
|
|
/* Date: 13. Feb. 98 */
|
|
/* *************************************************************************/
|
|
|
|
|
|
|
|
extern int
|
|
IntersectTriangleLine (const Point<3> ** tri, const Point<3> ** line);
|
|
|
|
|
|
|
|
/**
|
|
Returns 0, iff
|
|
closure (tet) cup closure (tri) is empty, one corner point of tet,
|
|
one edge of tet or one face of tet
|
|
*/
|
|
extern int
|
|
IntersectTetTriangle (const Point<3> ** tet, const Point<3> ** tri,
|
|
const int * tetpi = NULL, const int * tripi = NULL);
|
|
|
|
/**
|
|
Same test as above, but tet int reference position (0, ex, ey, ez),
|
|
tetpi = 1, 2, 4, 5
|
|
*/
|
|
extern int
|
|
IntersectTetTriangleRef (const Point3d ** tri, const int * tripi = NULL);
|
|
|
|
|
|
// 1, iff not regular triangulation
|
|
extern int
|
|
IntersectTriangleTriangle (const Point<3> ** tri1, const Point<3> ** tri2);
|
|
|
|
|
|
extern void
|
|
LocalCoordinates (const Vec3d & e1, const Vec3d & e2,
|
|
const Vec3d & v, double & lam1, double & lam2);
|
|
|
|
/// return 1 = degenerated sphere
|
|
extern int
|
|
CalcSphereCenter (const Point<3> ** pts, Point<3> & c);
|
|
|
|
/// return 1 = degenerated triangle
|
|
extern int
|
|
CalcTriangleCenter (const Point3d ** pts, Point3d & c);
|
|
|
|
|
|
|
|
/*
|
|
Compute radius of cylinder fitting 4 points.
|
|
cylinder axis is in the direction of p1-p2
|
|
*/
|
|
extern double ComputeCylinderRadius (const Point3d & p1, const Point3d & p2,
|
|
const Point3d & p3, const Point3d & p4);
|
|
|
|
/*
|
|
Two triangles T1 and T2 have normals n1 and n2.
|
|
The height over the common edge is h1, and h2.
|
|
Radius of cylinder fitting both triangles
|
|
*/
|
|
extern double ComputeCylinderRadius (const Vec3d & n1, const Vec3d & n2,
|
|
double h1, double h2);
|
|
|
|
/// Minimal distance of point p to the line segment [lp1,lp2]
|
|
extern double MinDistLP2 (const Point2d & lp1, const Point2d & lp2, const Point2d & p);
|
|
|
|
/// Minimal distance of point p to the line segment [lp1,lp2]
|
|
extern double MinDistLP2 (const Point3d & lp1, const Point3d & lp2, const Point3d & p);
|
|
|
|
/// Minimal distance of point p to the triangle segment [tp1,tp2,pt3]
|
|
extern double MinDistTP2 (const Point3d & tp1, const Point3d & tp2,
|
|
const Point3d & tp3, const Point3d & p);
|
|
|
|
/// Minimal distance of the 2 lines [l1p1,l1p2] and [l2p1,l2p2]
|
|
extern double MinDistLL2 (const Point3d & l1p1, const Point3d & l1p2,
|
|
const Point3d & l2p1, const Point3d & l2p2);
|
|
|
|
|
|
#endif
|