Slic3r::sla::PointRing< N > Class Template Reference

#include <src/libslic3r/SLA/SupportTreeUtils.hpp>

Collaboration diagram for Slic3r::sla::PointRing< N >:

Public Member Functions
	PointRing (const Vec3d &n)
Vec3d	get (size_t idx, const Vec3d &src, double r) const

Static Private Member Functions
static bool constexpr	is_one (double val)

Private Attributes
std::array< double, N - 1 >	m_phis
Vec3d	a = {0, 1, 0}
Vec3d	b
double	m_radius = 0.

Detailed Description

template<size_t N>
class Slic3r::sla::PointRing< N >

Constructor & Destructor Documentation

PointRing()

template<size_t N>

Slic3r::sla::PointRing< N >::PointRing ( const Vec3d &  n )

inline

                              : m_phis{linspace_array<N - 1>(0., 2 * PI)}
    {
        // We have to address the case when the direction vector v (same as
        // dir) is coincident with one of the world axes. In this case two of
        // its components will be completely zero and one is 1.0. Our method
        // becomes dangerous here due to division with zero. Instead, vector
        // 'a' can be an element-wise rotated version of 'v'
        if(is_one(n(X)) || is_one(n(Y)) || is_one(n(Z))) {
            a = {n(Z), n(X), n(Y)};
            b = {n(Y), n(Z), n(X)};
        }
        else {
            a(Z) = -(n(Y)*a(Y)) / n(Z); a.normalize();
            b = a.cross(n);
        }
    }

References Slic3r::sla::PointRing< N >::a, Slic3r::sla::PointRing< N >::b, Slic3r::sla::PointRing< N >::is_one(), Slic3r::X, Slic3r::Y, and Slic3r::Z.

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Member Function Documentation

get()

template<size_t N>

Vec3d Slic3r::sla::PointRing< N >::get ( size_t  idx, const Vec3d &  src, double  r  ) const

inline

    {
        if (idx == 0)
            return src;
 
        double phi = m_phis[idx - 1];
        double sinphi = std::sin(phi);
        double cosphi = std::cos(phi);
 
        double rpscos = r * cosphi;
        double rpssin = r * sinphi;
 
        // Point on the sphere
        return {src(X) + rpscos * a(X) + rpssin * b(X),
                src(Y) + rpscos * a(Y) + rpssin * b(Y),
                src(Z) + rpscos * a(Z) + rpssin * b(Z)};
    }

References Slic3r::sla::PointRing< N >::a, Slic3r::sla::PointRing< N >::b, Slic3r::sla::PointRing< N >::m_phis, Slic3r::X, Slic3r::Y, and Slic3r::Z.

Referenced by Slic3r::sla::pinhead_mesh_hit().

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is_one()

template<size_t N>

static bool constexpr Slic3r::sla::PointRing< N >::is_one ( double  val )

inlinestaticconstexprprivate

    {
        constexpr double eps = 1e-20;
 
        return std::abs(std::abs(val) - 1) < eps;
    }

Referenced by Slic3r::sla::PointRing< N >::PointRing().

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Member Data Documentation

a

template<size_t N>

Vec3d Slic3r::sla::PointRing< N >::a = {0, 1, 0}

private

Referenced by Slic3r::sla::PointRing< N >::PointRing(), and Slic3r::sla::PointRing< N >::get().

b

template<size_t N>

Vec3d Slic3r::sla::PointRing< N >::b

private

Referenced by Slic3r::sla::PointRing< N >::PointRing(), and Slic3r::sla::PointRing< N >::get().

m_phis

template<size_t N>

std::array<double, N - 1> Slic3r::sla::PointRing< N >::m_phis

private

Referenced by Slic3r::sla::PointRing< N >::get().

m_radius

template<size_t N>

double Slic3r::sla::PointRing< N >::m_radius = 0.

private

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The documentation for this class was generated from the following file:

• src/libslic3r/SLA/SupportTreeUtils.hpp