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EigenMesh3D raycaster should now be able to pick a correct intersection on the object or inside a hole

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This commit is contained in:
Lukas Matena 2019-11-19 14:27:05 +01:00
parent 9dd18a8d6d
commit 2c1d256b0c
5 changed files with 147 additions and 57 deletions
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40
src/libslic3r/SLA/EigenMesh3D.hpp
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@ -42,10 +42,10 @@ public:
// Result of a raycast
class hit_result {
double m_t = std::nan("");
int m_face_id = -1;
const EigenMesh3D *m_mesh = nullptr;
Vec3d m_dir;
Vec3d m_source;
Vec3d m_normal = Vec3d::Zero();
friend class EigenMesh3D;
// A valid object of this class can only be obtained from
@ -60,26 +60,23 @@ public:
inline double distance() const { return m_t; }
inline const Vec3d& direction() const { return m_dir; }
inline const Vec3d& source() const { return m_source; }
inline Vec3d position() const { return m_source + m_dir * m_t; }
inline int face() const { return m_face_id; }
inline bool is_valid() const { return m_mesh != nullptr; }
inline bool is_hit() const { return m_normal != Vec3d::Zero(); }
// Hit_result can decay into a double as the hit distance.
inline operator double() const { return distance(); }
inline Vec3d normal() const {
if(m_face_id < 0 || !is_valid()) return {};
auto trindex = m_mesh->m_F.row(m_face_id);
const Vec3d& p1 = m_mesh->V().row(trindex(0));
const Vec3d& p2 = m_mesh->V().row(trindex(1));
const Vec3d& p3 = m_mesh->V().row(trindex(2));
Eigen::Vector3d U = p2 - p1;
Eigen::Vector3d V = p3 - p1;
return U.cross(V).normalized();
inline const Vec3d& normal() const {
if(!is_valid())
throw std::runtime_error("EigenMesh3D::hit_result::normal() "
"called on invalid object.");
return m_normal;
}
inline bool is_inside() {
return m_face_id >= 0 && normal().dot(m_dir) > 0;
inline bool is_inside() const {
return normal().dot(m_dir) > 0;
}
};
@ -91,6 +88,11 @@ public:
// Casts a ray on the mesh and returns all hits
std::vector<hit_result> query_ray_hits(const Vec3d &s, const Vec3d &dir) const;
// Iterates over hits and holes and returns the true hit, possibly
// on the inside of a hole.
hit_result filter_hits(const std::vector<EigenMesh3D::hit_result>& obj_hits,
const std::vector<DrainHole>& holes) const;
class si_result {
double m_value;
int m_fidx;
@ -123,6 +125,16 @@ public:
Vec3d c;
return squared_distance(p, i, c);
}
Vec3d normal_by_face_id(int face_id) const {
auto trindex = F().row(face_id);
const Vec3d& p1 = V().row(trindex(0));
const Vec3d& p2 = V().row(trindex(1));
const Vec3d& p3 = V().row(trindex(2));
Eigen::Vector3d U = p2 - p1;
Eigen::Vector3d V = p3 - p1;
return U.cross(V).normalized();
}
};
// Calculate the normals for the selected points (from 'points' set) on the