QIDISlicer1.0.0

src/libslic3r/MeshNormals.hpp

@@ -0,0 +1,52 @@
+#ifndef MESHNORMALS_HPP
+#define MESHNORMALS_HPP
+
+#include "AABBMesh.hpp"
+
+#include "libslic3r/Execution/ExecutionSeq.hpp"
+#include "libslic3r/Execution/ExecutionTBB.hpp"
+
+namespace Slic3r {
+
+// Get a good approximation of the normal for any picking point on the mesh.
+// For points projecting to a face, this is the face normal, but when the
+// picking point is on an edge or a vertex of the mesh, the normal is the
+// normalized sum of each unique face normal (works nicely). The eps parameter
+// gives a tolerance for how close a sample point has to be to an edge or
+// vertex to start considering neighboring faces for the resulting normal.
+Vec3d get_normal(const AABBMesh &mesh,
+                 const Vec3d    &picking_point,
+                 double          eps = 0.05);
+
+using PointSet = Eigen::MatrixXd;
+
+// Calculate the normals for the selected points (from 'points' set) on the
+// mesh. This will call squared distance for each point.
+template<class Ex>
+Eigen::MatrixXd normals(
+    Ex                           ex_policy,
+    const PointSet              &points,
+    const AABBMesh              &convert_mesh,
+    double                       eps = 0.05, // min distance from edges
+    std::function<void()>        throw_on_cancel = []() {},
+    const std::vector<unsigned> &selected_points = {});
+
+extern template Eigen::MatrixXd normals(
+    ExecutionSeq                policy,
+    const PointSet              &points,
+    const AABBMesh              &convert_mesh,
+    double                       eps,
+    std::function<void()>        throw_on_cancel,
+    const std::vector<unsigned> &selected_points);
+
+extern template Eigen::MatrixXd normals(
+    ExecutionTBB                 policy,
+    const PointSet              &points,
+    const AABBMesh              &convert_mesh,
+    double                       eps,
+    std::function<void()>        throw_on_cancel,
+    const std::vector<unsigned> &selected_points);
+
+} // namespace Slic3r
+
+#endif // MESHNORMALS_HPP