GPencil: Add new parameteres to transform layers

When using grease pencil for drawing Storyboards, it's very common to require a transform of the layers. This transform can be done using the offset modifier, but in some cases, the scene requires a lot of modifiers and makes the file hard to work.

This new feature adds a transforms Location, Rotation and Scale at Layer level, and allows to transform the layer without using a modifier, keeping the scene more clean.

{F9480695}

This feature was suggested by @pepeland after receiving feedback from several artists.

Also, done some code cleanup and rename some functions to get a better naming.

Maniphest Tasks: T83660

Differential Revision: https://developer.blender.org/D9761

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_290.c b/source/blender/blenloader/intern/versioning_290.c
index 49c8947dd04..40481505e1c 100644
--- a/source/blender/blenloader/intern/versioning_290.c
+++ b/source/blender/blenloader/intern/versioning_290.c
@@ -1582,5 +1582,18 @@ void blo_do_versions_290(FileData *fd, Library *UNUSED(lib), Main *bmain)
    */
   {
     /* Keep this block, even when empty. */
+
+    /* Grease pencil layer transform matrix. */
+    if (!DNA_struct_elem_find(fd->filesdna, "bGPDlayer", "float", "location[0]")) {
+      LISTBASE_FOREACH (bGPdata *, gpd, &bmain->gpencils) {
+        LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
+          zero_v3(gpl->location);
+          zero_v3(gpl->rotation);
+          copy_v3_fl(gpl->scale, 1.0f);
+          loc_eul_size_to_mat4(gpl->layer_mat, gpl->location, gpl->rotation, gpl->scale);
+          invert_m4_m4(gpl->layer_invmat, gpl->layer_mat);
+        }
+      }
+    }
   }
 }