// test for intersection with the fiber and a tip-tang line
// if there is an intersection in tip-tang, calculate the cc-point and update the interval
//C++ TO C# CONVERTER WARNING: 'const' methods are not available in C#:
//ORIGINAL LINE: bool cone_CC(const Point& tang, const Point& tip, const Point& base, const Point& p1, const Point& p2, const Fiber& f, Interval& i) const
protected bool cone_CC(Point tang, Point tip, Point @base, Point p1, Point p2, Fiber f, Interval i)
{
double u = 0;
double t = 0;
if (GlobalMembers.xy_line_line_intersection(f.p1, f.p2, ref u, tang, tip, ref t))
{
if ((t >= 0.0) && (t <= 1.0))
{
CCPoint cc_tmp = new CCPoint(@base + t * (tip - @base));
cc_tmp.z_projectOntoEdge(p1, p2);
cc_tmp.type = CCType.EDGE_CONE;
return(i.update_ifCCinEdgeAndTrue(u, cc_tmp, p1, p2, (true)));
}
}
return(false);
}
/// push-cutter horizontal edge case
/// horizontal are much simpler than the general case.
/// we can consider the cutter circular with an effective radius of this->width(h)
// this is the horizontal edge case
//C++ TO C# CONVERTER WARNING: 'const' methods are not available in C#:
//ORIGINAL LINE: bool horizEdgePush(const Fiber& f, Interval& i, const Point& p1, const Point& p2) const
protected bool horizEdgePush(Fiber f, Interval i, Point p1, Point p2)
{
bool result = false;
double h = p1.z - f.p1.z; // height of edge above fiber
if ((h > 0.0))
{
if (GlobalMembers.isZero_tol(p2.z - p1.z))
{ // this is the horizontal-edge special case
double eff_radius = this.width(h); // the cutter acts as a cylinder with eff_radius
// contact this cylinder/circle against edge in xy-plane
double qt = 0; // fiber is f.p1 + qt*(f.p2-f.p1)
double qv = 0; // line is p1 + qv*(p2-p1)
if (GlobalMembers.xy_line_line_intersection(p1, p2, ref qv, f.p1, f.p2, ref qt))
{
Point q = p1 + qv * (p2 - p1); // the intersection point
// from q, go v-units along tangent, then eff_r*normal, and end up on fiber:
// q + ccv*tangent + r*normal = p1 + clt*(p2-p1)
double ccv = 0;
double clt = 0;
Point xy_tang = p2 - p1;
xy_tang.z = 0;
xy_tang.xyNormalize();
Point xy_normal = xy_tang.xyPerp();
Point q1 = q + eff_radius * xy_normal;
Point q2 = q1 + (p2 - p1);
if (GlobalMembers.xy_line_line_intersection(q1, q2, ref ccv, f.p1, f.p2, ref clt))
{
double t_cl1 = clt;
double t_cl2 = qt + (qt - clt);
if (calcCCandUpdateInterval(t_cl1, ccv, q, p1, p2, f, i, f.p1.z, CCType.EDGE_HORIZ))
{
result = true;
}
if (calcCCandUpdateInterval(t_cl2, -ccv, q, p1, p2, f, i, f.p1.z, CCType.EDGE_HORIZ))
{
result = true;
}
}
}
}
}
//std::cout << " horizEdgePush = " << result << "\n";
return(result);
}
/// push-cutter cylindrical shaft case.
/// This is called when the contact is above the sphere/toroid/cone shaped lower part of the cutter
// this is used for the cylindrical shaft of Cyl, Ball, Bull, Cone
//C++ TO C# CONVERTER WARNING: 'const' methods are not available in C#:
//ORIGINAL LINE: bool shaftEdgePush(const Fiber& f, Interval& i, const Point& p1, const Point& p2) const
protected bool shaftEdgePush(Fiber f, Interval i, Point p1, Point p2)
{
// push cutter along Fiber f in contact with edge p1-p2
// contact with cylindrical cutter shaft
double u = 0;
double v = 0;
bool result = false;
if (GlobalMembers.xy_line_line_intersection(p1, p2, ref u, f.p1, f.p2, ref v))
{ // find XY-intersection btw fiber and edge
Point q = p1 + u * (p2 - p1); // edge/fiber intersection point, on edge
// Point q = f.p1 + v*(f.p2-f.p1); // q on fiber
// from q, go v_cc*xy_tangent, then r*xy_normal, and end up on fiber:
// q + v_cc*tangent + r*xy_normal = p1 + t_cl*(p2-p1)
Point xy_tang = p2 - p1;
xy_tang.z = 0;
xy_tang.xyNormalize();
Point xy_normal = xy_tang.xyPerp();
Point q1 = q + radius * xy_normal;
Point q2 = q1 + (p2 - p1);
double u_cc = 0;
double t_cl = 0;
if (GlobalMembers.xy_line_line_intersection(q1, q2, ref u_cc, f.p1, f.p2, ref t_cl))
{
double t_cl1 = t_cl; // cc_tmp1 = q +/- u_cc*(p2-p1);
double t_cl2 = v + (v - t_cl);
if (calcCCandUpdateInterval(t_cl1, u_cc, q, p1, p2, f, i, f.p1.z + center_height, CCType.EDGE_SHAFT))
{
result = true;
}
if (calcCCandUpdateInterval(t_cl2, -u_cc, q, p1, p2, f, i, f.p1.z + center_height, CCType.EDGE_SHAFT))
{
result = true;
}
}
}
//std::cout << " shaftEdgePush = " << result << "\n";
return(result);
}
