Merge branch 'tm_openvdb_integration' into lm_tm_hollowing

* Refactor file names in SLA dir

src/libslic3r/SLA/Rotfinder.hpp

@@ -0,0 +1,38 @@
+#ifndef SLA_ROTFINDER_HPP
+#define SLA_ROTFINDER_HPP
+
+#include <functional>
+#include <array>
+
+namespace Slic3r {
+
+class ModelObject;
+
+namespace sla {
+
+/**
+  * The function should find the best rotation for SLA upside down printing.
+  *
+  * @param modelobj The model object representing the 3d mesh.
+  * @param accuracy The optimization accuracy from 0.0f to 1.0f. Currently,
+  * the nlopt genetic optimizer is used and the number of iterations is
+  * accuracy * 100000. This can change in the future.
+  * @param statuscb A status indicator callback called with the unsigned
+  * argument spanning from 0 to 100. May not reach 100 if the optimization finds
+  * an optimum before max iterations are reached.
+  * @param stopcond A function that if returns true, the search process will be
+  * terminated and the best solution found will be returned.
+  *
+  * @return Returns the rotations around each axis (x, y, z)
+  */
+std::array<double, 3> find_best_rotation(
+        const ModelObject& modelobj,
+        float accuracy = 1.0f,
+        std::function<void(unsigned)> statuscb = [] (unsigned) {},
+        std::function<bool()> stopcond = [] () { return false; }
+        );
+
+}
+}
+
+#endif // SLAROTFINDER_HPP