WIP: Transformation of instances in world coordinate space:

Ulocking the "anisotropic" scaling checkbox will bake the transformation
into meshes to allow for scaling in world axes.

Optimized and templated the stl_transform functions, now also available for 3x3 matrices.
The Canvas3D::reload_scene() now maintains selection even if all volumes of an instance changed their IDs.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/slic3r/GUI/3DScene.cpp b/src/slic3r/GUI/3DScene.cpp
index 9038e388c..bbedc0802 100644
--- a/src/slic3r/GUI/3DScene.cpp
+++ b/src/slic3r/GUI/3DScene.cpp
@@ -716,6 +716,8 @@ int GLVolumeCollection::load_wipe_tower_preview(
     v.bounding_box = v.indexed_vertex_array.bounding_box();
     v.indexed_vertex_array.finalize_geometry(use_VBOs);
 	v.composite_id = GLVolume::CompositeID(obj_idx, 0, 0);
+    v.geometry_id.first = 0;
+    v.geometry_id.second = wipe_tower_instance_id().id;
     v.is_wipe_tower = true;
     v.shader_outside_printer_detection_enabled = ! size_unknown;
     return int(this->volumes.size() - 1);