More SLA support points improvements

- unselected objects are hidden when SLA gizmo is active
- support volumes are hidden when editing mode is active
- 3mf support points format versioning

src/libslic3r/SLA/SLACommon.hpp

@@ -0,0 +1,48 @@
+#ifndef SLACOMMON_HPP
+#define SLACOMMON_HPP
+
+#include <Eigen/Geometry>
+
+
+namespace Slic3r {
+    
+// Typedef from Point.hpp
+typedef Eigen::Matrix<float, 3, 1, Eigen::DontAlign> Vec3f;
+
+namespace sla {
+    
+struct SupportPoint {
+    Vec3f pos;
+    float head_front_radius;
+    bool is_new_island;
+
+    SupportPoint() :
+    pos(Vec3f::Zero()), head_front_radius(0.f), is_new_island(false) {}
+
+    SupportPoint(float pos_x, float pos_y, float pos_z, float head_radius, bool new_island) :
+    pos(pos_x, pos_y, pos_z), head_front_radius(head_radius), is_new_island(new_island) {}
+
+    SupportPoint(Vec3f position, float head_radius, bool new_island) :
+    pos(position), head_front_radius(head_radius), is_new_island(new_island) {}
+
+    SupportPoint(Eigen::Matrix<float, 5, 1, Eigen::DontAlign> data) :
+    pos(data(0), data(1), data(2)), head_front_radius(data(3)), is_new_island(data(4)) {}
+
+    bool operator==(const SupportPoint& sp) const { return (pos==sp.pos) && head_front_radius==sp.head_front_radius && is_new_island==sp.is_new_island; }
+};
+
+
+/// An index-triangle structure for libIGL functions. Also serves as an
+/// alternative (raw) input format for the SLASupportTree
+struct EigenMesh3D {
+    Eigen::MatrixXd V;
+    Eigen::MatrixXi F;
+    double ground_level = 0;
+};
+
+
+} // namespace sla
+} // namespace Slic3r
+
+
+#endif // SLASUPPORTTREE_HPP