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MeshRaycaster class is now used in SLA gizmo when selecting by rectangle

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This commit is contained in:
Lukas Matena 2019-09-17 14:14:26 +02:00
parent 3694bf3da9
commit 1dfd8a0e62
3 changed files with 63 additions and 70 deletions
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45
src/slic3r/GUI/MeshUtils.cpp
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@ -196,11 +196,52 @@ bool MeshRaycaster::unproject_on_mesh(const Vec2d& mouse_pos, const Transform3d&
}
std::vector<size_t> MeshRaycaster::get_unobscured_idxs(const Transform3d& trafo, const Camera& camera, const std::vector<Vec3f>& points) const
std::vector<unsigned> MeshRaycaster::get_unobscured_idxs(const Geometry::Transformation& trafo, const Camera& camera, const std::vector<Vec3f>& points,
std::function<bool(const Vec3f&)> fn_ignore_hit) const
{
std::vector<unsigned> out;
const Transform3d& instance_matrix_no_translation_no_scaling = trafo.get_matrix(true,false,true);
Vec3f direction_to_camera = -camera.get_dir_forward().cast<float>();
Vec3f direction_to_camera_mesh = (instance_matrix_no_translation_no_scaling.inverse().cast<float>() * direction_to_camera).normalized().eval();
Vec3f scaling = trafo.get_scaling_factor().cast<float>();
direction_to_camera_mesh = Vec3f(direction_to_camera_mesh(0)*scaling(0), direction_to_camera_mesh(1)*scaling(1), direction_to_camera_mesh(2)*scaling(2));
return std::vector<size_t>();
for (size_t i=0; i<points.size(); ++i) {
const Vec3f& pt = points[i];
bool is_obscured = false;
// Cast a ray in the direction of the camera and look for intersection with the mesh:
std::vector<igl::Hit> hits;
// Offset the start of the ray to the front of the ball + EPSILON to account for numerical inaccuracies.
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),
pt + direction_to_camera_mesh * EPSILON, direction_to_camera_mesh, hits)) {
std::sort(hits.begin(), hits.end(), [](const igl::Hit& h1, const igl::Hit& h2) { return h1.t < h2.t; });
// If the closest hit facet normal points in the same direction as the ray,
// we are looking through the mesh and should therefore discard the point:
if (m_AABB_wrapper->get_hit_normal(hits.front()).dot(direction_to_camera_mesh) > 0.f)
is_obscured = true;
// Eradicate all hits that the caller wants to ignore
for (unsigned j=0; j<hits.size(); ++j) {
const igl::Hit& hit = hits[j];
if (fn_ignore_hit(m_AABB_wrapper->get_hit_pos(hit))) {
hits.erase(hits.begin()+j);
--j;
}
}
// FIXME: the intersection could in theory be behind the camera, but as of now we only have camera direction.
// Also, the threshold is in mesh coordinates, not in actual dimensions.
if (! hits.empty())
is_obscured = true;
}
if (! is_obscured)
out.push_back(i);
}
return out;
}