greasepencil_tools/draw_tools.py

@@ -2,6 +2,8 @@
 
 import bpy
 
+from .ui_panels import get_camera
+
 class GP_OT_camera_flip_x(bpy.types.Operator):
     bl_idname = "gp.camera_flip_x"
     bl_label = "Camera Flip X"
@@ -14,7 +16,7 @@ class GP_OT_camera_flip_x(bpy.types.Operator):
             and context.space_data.region_3d.view_perspective == 'CAMERA'
 
     def execute(self, context):
-        context.scene.camera.scale.x *= -1
+        get_camera().scale.x *= -1
         return {"FINISHED"}
 
 def register():

greasepencil_tools/rotate_canvas.py

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from .prefs import get_addon_prefs
+from .ui_panels import get_camera
 
 import bpy
 import math
@@ -215,8 +216,7 @@ class RC_OT_RotateCanvas(bpy.types.Operator):
         self.ratio_inv = w / h
 
         if self.in_cam:
-            # Get camera from scene
-            self.cam = bpy.context.scene.camera
+            self.cam = get_camera()
 
             #return if one element is locked (else bypass location)
             if self.cam.lock_rotation[:] != (False, False, False):

greasepencil_tools/ui_panels.py

@@ -2,6 +2,14 @@
 
 import bpy
 
+def get_camera():
+    if bpy.context.area.type == 'VIEW_3D' and bpy.context.space_data.use_local_camera:
+        # Get camera from area's local camera
+        return bpy.context.space_data.camera
+    else:
+        # Get camera from scene
+        return bpy.context.scene.camera
+
 class GP_PT_sidebarPanel(bpy.types.Panel):
     bl_label = "Grease Pencil Tools"
     bl_space_type = "VIEW_3D"
@@ -30,8 +38,9 @@ class GP_PT_sidebarPanel(bpy.types.Panel):
         row.operator('view3d.rotate_canvas_reset', text = 'Reset Rotation', icon = 'FILE_REFRESH')
         row.operator('view3d.rotate_canvas_set', text = 'Save Rotation', icon = 'DRIVER_ROTATIONAL_DIFFERENCE')
 
+        cam = get_camera()
         # View flip
-        if context.scene.camera and context.scene.camera.scale.x < 0:
+        if cam and cam.scale.x < 0:
             row = layout.row(align=True)
             row.operator('gp.camera_flip_x', text = 'Camera Mirror Flip', icon = 'MOD_MIRROR')
             row.label(text='', icon='LOOP_BACK')