Do some hollowing finally.

This commit is contained in:
tamasmeszaros 2019-10-31 14:36:33 +01:00
parent ce9c2c5dd4
commit 2165537fa5
8 changed files with 202 additions and 62 deletions

View file

@ -12,25 +12,35 @@
#include "SLASpatIndex.hpp"
namespace Slic3r {
typedef Eigen::Matrix<int, 4, 1, Eigen::DontAlign> Vec4i;
namespace sla {
/// Intermediate struct for a 3D mesh
struct Contour3D {
Pointf3s points;
std::vector<Vec3i> indices;
std::vector<Vec3i> faces3;
std::vector<Vec4i> faces4;
Contour3D& merge(const Contour3D& ctr)
{
auto s3 = coord_t(points.size());
auto s = indices.size();
auto N = coord_t(points.size());
auto N_f3 = faces3.size();
auto N_f4 = faces4.size();
points.insert(points.end(), ctr.points.begin(), ctr.points.end());
indices.insert(indices.end(), ctr.indices.begin(), ctr.indices.end());
faces3.insert(faces3.end(), ctr.faces3.begin(), ctr.faces3.end());
faces4.insert(faces4.end(), ctr.faces4.begin(), ctr.faces4.end());
for(size_t n = s; n < indices.size(); n++) {
auto& idx = indices[n]; idx.x() += s3; idx.y() += s3; idx.z() += s3;
for(size_t n = N_f3; n < faces3.size(); n++) {
auto& idx = faces3[n]; idx.x() += N; idx.y() += N; idx.z() += N;
}
for(size_t n = N_f4; n < faces4.size(); n++) {
auto& idx = faces4[n]; for (int k = 0; k < 4; k++) idx(k) += N;
}
return *this;
}
@ -38,10 +48,10 @@ struct Contour3D {
{
const size_t offs = points.size();
points.insert(points.end(), triangles.begin(), triangles.end());
indices.reserve(indices.size() + points.size() / 3);
faces3.reserve(faces3.size() + points.size() / 3);
for(int i = int(offs); i < int(points.size()); i += 3)
indices.emplace_back(i, i + 1, i + 2);
faces3.emplace_back(i, i + 1, i + 2);
return *this;
}
@ -53,10 +63,16 @@ struct Contour3D {
stream << "v " << p.transpose() << "\n";
}
for(auto& f : indices) {
for(auto& f : faces3) {
stream << "f " << (f + Vec3i(1, 1, 1)).transpose() << "\n";
}
for(auto& f : faces4) {
stream << "f " << (f + Vec4i(1, 1, 1, 1)).transpose() << "\n";
}
}
bool empty() const { return points.empty() || (faces4.empty() && faces3.empty()); }
};
using ClusterEl = std::vector<unsigned>;
@ -82,19 +98,45 @@ ClusteredPoints cluster(
// Calculate the normals for the selected points (from 'points' set) on the
// mesh. This will call squared distance for each point.
PointSet normals(const PointSet& points,
const EigenMesh3D& mesh,
const EigenMesh3D& convert_mesh,
double eps = 0.05, // min distance from edges
std::function<void()> throw_on_cancel = [](){},
const std::vector<unsigned>& selected_points = {});
/// Mesh from an existing contour.
inline TriangleMesh mesh(const Contour3D& ctour) {
return {ctour.points, ctour.indices};
inline TriangleMesh convert_mesh(const Contour3D& ctour) {
return {ctour.points, ctour.faces3};
}
/// Mesh from an evaporating 3D contour
inline TriangleMesh mesh(Contour3D&& ctour) {
return {std::move(ctour.points), std::move(ctour.indices)};
inline TriangleMesh convert_mesh(Contour3D&& ctour) {
return {std::move(ctour.points), std::move(ctour.faces3)};
}
inline Contour3D convert_mesh(const TriangleMesh &trmesh) {
Contour3D ret;
ret.points.reserve(trmesh.its.vertices.size());
ret.faces3.reserve(trmesh.its.indices.size());
for (auto &v : trmesh.its.vertices)
ret.points.emplace_back(v.cast<double>());
std::copy(trmesh.its.indices.begin(), trmesh.its.indices.end(),
std::back_inserter(ret.faces3));
return ret;
}
inline Contour3D convert_mesh(TriangleMesh &&trmesh) {
Contour3D ret;
ret.points.reserve(trmesh.its.vertices.size());
for (auto &v : trmesh.its.vertices)
ret.points.emplace_back(v.cast<double>());
ret.faces3.swap(trmesh.its.indices);
return ret;
}
}

View file

@ -69,7 +69,7 @@ Contour3D walls(
// Shorthand for the vertex arrays
auto& upts = upper.points, &lpts = lower.points;
auto& rpts = ret.points; auto& ind = ret.indices;
auto& rpts = ret.points; auto& ind = ret.faces3;
// If the Z levels are flipped, or the offset difference is negative, we
// will interpret that as the triangles normals should be inverted.
@ -677,7 +677,7 @@ void create_pad(const ExPolygons &sup_blueprint,
ThrowOnCancel thr)
{
Contour3D t = create_pad_geometry(sup_blueprint, model_blueprint, cfg, thr);
out.merge(mesh(std::move(t)));
out.merge(convert_mesh(std::move(t)));
}
std::string PadConfig::validate() const

View file

@ -12,7 +12,7 @@ Contour3D sphere(double rho, Portion portion, double fa) {
if(rho <= 1e-6 && rho >= -1e-6) return ret;
auto& vertices = ret.points;
auto& facets = ret.indices;
auto& facets = ret.faces3;
// Algorithm:
// Add points one-by-one to the sphere grid and form facets using relative
@ -102,7 +102,7 @@ Contour3D cylinder(double r, double h, size_t ssteps, const Vec3d &sp)
auto steps = int(ssteps);
auto& points = ret.points;
auto& indices = ret.indices;
auto& indices = ret.faces3;
points.reserve(2*ssteps);
double a = 2*PI/steps;
@ -211,8 +211,8 @@ Head::Head(double r_big_mm,
coord_t i1s1 = coord_t(idx1), i1s2 = coord_t(idx2);
coord_t i2s1 = i1s1 + 1, i2s2 = i1s2 + 1;
mesh.indices.emplace_back(i1s1, i2s1, i2s2);
mesh.indices.emplace_back(i1s1, i2s2, i1s2);
mesh.faces3.emplace_back(i1s1, i2s1, i2s2);
mesh.faces3.emplace_back(i1s1, i2s2, i1s2);
}
auto i1s1 = coord_t(s1.points.size()) - coord_t(steps);
@ -220,8 +220,8 @@ Head::Head(double r_big_mm,
auto i1s2 = coord_t(s1.points.size());
auto i2s2 = coord_t(s1.points.size()) + coord_t(steps) - 1;
mesh.indices.emplace_back(i2s2, i2s1, i1s1);
mesh.indices.emplace_back(i1s2, i2s2, i1s1);
mesh.faces3.emplace_back(i2s2, i2s1, i1s1);
mesh.faces3.emplace_back(i1s2, i2s2, i1s1);
// To simplify further processing, we translate the mesh so that the
// last vertex of the pointing sphere (the pinpoint) will be at (0,0,0)
@ -240,7 +240,7 @@ Pillar::Pillar(const Vec3d &jp, const Vec3d &endp, double radius, size_t st):
// move the data.
Contour3D body = cylinder(radius, height, st, endp);
mesh.points.swap(body.points);
mesh.indices.swap(body.indices);
mesh.faces3.swap(body.faces3);
}
}
@ -275,7 +275,7 @@ Pillar &Pillar::add_base(double baseheight, double radius)
base.points.emplace_back(endpt);
base.points.emplace_back(ep);
auto& indices = base.indices;
auto& indices = base.faces3;
auto hcenter = int(base.points.size() - 1);
auto lcenter = int(base.points.size() - 2);
auto offs = int(steps);
@ -466,7 +466,7 @@ const TriangleMesh &SupportTreeBuilder::merged_mesh() const
return m_meshcache;
}
m_meshcache = mesh(merged);
m_meshcache = convert_mesh(merged);
// The mesh will be passed by const-pointer to TriangleMeshSlicer,
// which will need this.