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NEW: add snap connector

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Jira:STUDIO-4227

most of the codes are referenced from PrusaSlicer,thanks YuSanka for the original submits

commit 7cd99d98f537198b78158feced2aa8977bfcbe08
Author: YuSanka <yusanka@gmail.com>
Date:   Wed Jul 12 18:06:51 2023 +0200
    WIP: Cut with Rivets
    * Code refactoring: get_connector_mesh() and apply_cut_connectors() moved from ModelObject to CutGizmo.
    * Allow to change values of space and bulges for snaps
7cd99d98f5
...

Change-Id: Id4c7991a0ed5bf9608823601775920a81a3dd1c4
This commit is contained in:
zhou.xu 2023-08-25 15:36:04 +08:00 • committed by Lane.Wei
parent 5658d32633
commit 7e51bf41a1
6 changed files with 234 additions and 26 deletions
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118
src/libslic3r/TriangleMesh.cpp
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@ -1116,6 +1116,124 @@ indexed_triangle_set its_make_sphere(double radius, double fa)
return mesh;
}
indexed_triangle_set its_make_snap(double r, double h, float space_proportion, float bulge_proportion)
{
const float radius = (float) r;
const float height = (float) h;
const size_t sectors_cnt = 10; //(float)fa;
const float halfPI = 0.5f * (float) PI;
const float space_len = space_proportion * radius;
const float b_len = radius;
const float m_len = (1 + bulge_proportion) * radius;
const float t_len = 0.5f * radius;
const float b_height = 0.f;
const float m_height = 0.5f * height;
const float t_height = height;
const float b_angle = acos(space_len / b_len);
const float t_angle = acos(space_len / t_len);
const float b_angle_step = b_angle / (float) sectors_cnt;
const float t_angle_step = t_angle / (float) sectors_cnt;
const Vec2f b_vec = Eigen::Vector2f(0, b_len);
const Vec2f t_vec = Eigen::Vector2f(0, t_len);
auto add_side_vertices = [b_vec, t_vec, b_height, m_height, t_height](std::vector<stl_vertex> &vertices, float b_angle, float t_angle, const Vec2f &m_vec) {
Vec2f b_pt = Eigen::Rotation2Df(b_angle) * b_vec;
Vec2f m_pt = Eigen::Rotation2Df(b_angle) * m_vec;
Vec2f t_pt = Eigen::Rotation2Df(t_angle) * t_vec;
vertices.emplace_back(Vec3f(b_pt(0), b_pt(1), b_height));
vertices.emplace_back(Vec3f(m_pt(0), m_pt(1), m_height));
vertices.emplace_back(Vec3f(t_pt(0), t_pt(1), t_height));
};
auto add_side_facets = [](std::vector<stl_triangle_vertex_indices> &facets, int vertices_cnt, int frst_id, int scnd_id) {
int id = vertices_cnt - 1;
facets.emplace_back(frst_id, id - 2, id - 5);
facets.emplace_back(id - 2, id - 1, id - 5);
facets.emplace_back(id - 1, id - 4, id - 5);
facets.emplace_back(id - 4, id - 1, id);
facets.emplace_back(id, id - 3, id - 4);
facets.emplace_back(id, scnd_id, id - 3);
};
const float f = (b_len - m_len) / m_len; // Flattening
auto get_m_len = [b_len, f](float angle) {
const float rad_sqr = b_len * b_len;
const float sin_sqr = sin(angle) * sin(angle);
const float f_sqr = (1 - f) * (1 - f);
return sqrtf(rad_sqr / (1 + (1 / f_sqr - 1) * sin_sqr));
};
auto add_sub_mesh = [add_side_vertices, add_side_facets, get_m_len, b_height, t_height, b_angle, t_angle, b_angle_step,
t_angle_step](indexed_triangle_set &mesh, float center_x, float angle_rotation, int frst_vertex_id) {
auto &vertices = mesh.vertices;
auto &facets = mesh.indices;
// 2 special vertices, top and bottom center, rest are relative to this
vertices.emplace_back(Vec3f(center_x, 0.f, b_height));
vertices.emplace_back(Vec3f(center_x, 0.f, t_height));
float b_angle_start = angle_rotation - b_angle;
float t_angle_start = angle_rotation - t_angle;
const float b_angle_stop = angle_rotation + b_angle;
const int frst_id = frst_vertex_id;
const int scnd_id = frst_id + 1;
// add first side vertices and internal facets
{
const Vec2f m_vec = Eigen::Vector2f(0, get_m_len(b_angle_start));
add_side_vertices(vertices, b_angle_start, t_angle_start, m_vec);
int id = (int) vertices.size() - 1;
facets.emplace_back(frst_id, id - 2, id - 1);
facets.emplace_back(frst_id, id - 1, id);
facets.emplace_back(frst_id, id, scnd_id);
}
// add d side vertices and facets
while (!is_approx(b_angle_start, b_angle_stop)) {
b_angle_start += b_angle_step;
t_angle_start += t_angle_step;
const Vec2f m_vec = Eigen::Vector2f(0, get_m_len(b_angle_start));
add_side_vertices(vertices, b_angle_start, t_angle_start, m_vec);
add_side_facets(facets, (int) vertices.size(), frst_id, scnd_id);
}
// add last internal facets to close the mesh
{
int id = (int) vertices.size() - 1;
facets.emplace_back(frst_id, scnd_id, id);
facets.emplace_back(frst_id, id, id - 1);
facets.emplace_back(frst_id, id - 1, id - 2);
}
};
indexed_triangle_set mesh;
mesh.vertices.reserve(2 * (3 * (2 * sectors_cnt + 1) + 2));
mesh.indices.reserve(2 * (6 * 2 * sectors_cnt + 6));
add_sub_mesh(mesh, -space_len, halfPI, 0);
add_sub_mesh(mesh, space_len, 3 * halfPI, (int) mesh.vertices.size());
return mesh;
}
indexed_triangle_set its_convex_hull(const std::vector<Vec3f> &pts)
{
std::vector<Vec3f> dst_vertices;