3D-printing/OrcaSlicer
1
0
Fork 0
mirror of https://github.com/SoftFever/OrcaSlicer.git synced 2025-07-11 08:47:52 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Unproject on mesh in the SLA gizmo is now performed by the MeshRaycaster class

Browse source
This commit is contained in:
Lukas Matena 2019-09-17 09:17:53 +02:00
parent 284355d378
commit b6292247e8
4 changed files with 137 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

92
src/slic3r/GUI/MeshUtils.cpp
View file

@ -3,6 +3,15 @@
#include "libslic3r/Tesselate.hpp"
#include "libslic3r/TriangleMesh.hpp"
#include "slic3r/GUI/Camera.hpp"
// There is an L function in igl that would be overridden by our localization macro.
#undef L
#include <igl/AABB.h>
#include <GL/glew.h>
namespace Slic3r {
namespace GUI {
@ -90,6 +99,89 @@ void MeshClipper::recalculate_triangles()
}
class MeshRaycaster::AABBWrapper {
public:
AABBWrapper(const TriangleMesh* mesh);
~AABBWrapper() { m_AABB.deinit(); }
typedef Eigen::Map<const Eigen::Matrix<float, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor | Eigen::DontAlign>> MapMatrixXfUnaligned;
typedef Eigen::Map<const Eigen::Matrix<int, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor | Eigen::DontAlign>> MapMatrixXiUnaligned;
igl::AABB<MapMatrixXfUnaligned, 3> m_AABB;
};
MeshRaycaster::AABBWrapper::AABBWrapper(const TriangleMesh* mesh)
{
const indexed_triangle_set* its = &mesh->its;
m_AABB.init(
MapMatrixXfUnaligned(its->vertices.front().data(), its->vertices.size(), 3),
MapMatrixXiUnaligned(its->indices.front().data(), its->indices.size(), 3));
}
MeshRaycaster::MeshRaycaster(const TriangleMesh& mesh)
: m_AABB_wrapper(new AABBWrapper(&mesh)), m_mesh(&mesh)
{
}
MeshRaycaster::~MeshRaycaster()
{
delete m_AABB_wrapper;
}
bool MeshRaycaster::unproject_on_mesh(const Vec2d& mouse_pos, const Transform3d& trafo,
const Camera& camera, std::vector<Vec3f>* positions, std::vector<Vec3f>* normals) const
{
const std::array<int, 4>& viewport = camera.get_viewport();
const Transform3d& model_mat = camera.get_view_matrix();
const Transform3d& proj_mat = camera.get_projection_matrix();
Vec3d pt1;
Vec3d pt2;
::gluUnProject(mouse_pos(0), viewport[3] - mouse_pos(1), 0.f, model_mat.data(), proj_mat.data(), viewport.data(), &pt1(0), &pt1(1), &pt1(2));
::gluUnProject(mouse_pos(0), viewport[3] - mouse_pos(1), 1.f, model_mat.data(), proj_mat.data(), viewport.data(), &pt2(0), &pt2(1), &pt2(2));
std::vector<igl::Hit> hits;
Transform3d inv = trafo.inverse();
pt1 = inv * pt1;
pt2 = inv * pt2;
if (! m_AABB_wrapper->m_AABB.intersect_ray(
AABBWrapper::MapMatrixXfUnaligned(m_mesh->its.vertices.front().data(), m_mesh->its.vertices.size(), 3),
AABBWrapper::MapMatrixXiUnaligned(m_mesh->its.indices.front().data(), m_mesh->its.indices.size(), 3),
pt1.cast<float>(), (pt2-pt1).cast<float>(), hits))
return false; // no intersection found
std::sort(hits.begin(), hits.end(), [](const igl::Hit& a, const igl::Hit& b) { return a.t < b.t; });
// Now stuff the points in the provided vector and calculate normals if asked about them:
if (positions != nullptr) {
positions->clear();
if (normals != nullptr)
normals->clear();
Vec3f bc;
Vec3f a;
Vec3f b;
int fid = 0;
for (const igl::Hit& hit : hits) {
fid = hit.id;
bc = Vec3f(1-hit.u-hit.v, hit.u, hit.v); // barycentric coordinates of the hit
a = (m_mesh->its.vertices[m_mesh->its.indices[fid](1)] - m_mesh->its.vertices[m_mesh->its.indices[fid](0)]);
b = (m_mesh->its.vertices[m_mesh->its.indices[fid](2)] - m_mesh->its.vertices[m_mesh->its.indices[fid](0)]);
positions->push_back(bc(0) * m_mesh->its.vertices[m_mesh->its.indices[fid](0)] + bc(1) * m_mesh->its.vertices[m_mesh->its.indices[fid](1)] + bc(2) * m_mesh->its.vertices[m_mesh->its.indices[fid](2)]);
if (normals != nullptr)
normals->push_back(a.cross(b));
}
}
return true;
}
} // namespace GUI
} // namespace Slic3r