FBX IO: add support for import & export of camera focal length animation.

Requested in T54050, usually would not add new stuff to FBX but this
looked like totally needed for compo needs...

1 files changed, 22 insertions, 1 deletions

diff --git a/io_scene_fbx/export_fbx_bin.py b/io_scene_fbx/export_fbx_bin.py
index d161844f..b75a8977 100644
--- a/io_scene_fbx/export_fbx_bin.py
+++ b/io_scene_fbx/export_fbx_bin.py
@@ -1896,8 +1896,9 @@ def fbx_animations_do(scene_data, ref_id, f_start, f_end, start_zero, objects=No
                                ACNW(ob_obj.key, 'LCL_SCALING', force_key, force_sek, scale))
         p_rots[ob_obj] = rot
 
-    animdata_shapes = OrderedDict()
     force_key = (simplify_fac == 0.0)
+
+    animdata_shapes = OrderedDict()
     for me, (me_key, _shapes_key, shapes) in scene_data.data_deformers_shape.items():
         # Ignore absolute shape keys for now!
         if not me.shape_keys.use_relative:
@@ -1908,6 +1909,12 @@ def fbx_animations_do(scene_data, ref_id, f_start, f_end, start_zero, objects=No
             acnode.add_group(me_key, shape.name, shape.name, (shape.name,))
             animdata_shapes[channel_key] = (acnode, me, shape)
 
+    animdata_cameras = OrderedDict()
+    for cam_obj, cam_key in scene_data.data_cameras.items():
+        cam = cam_obj.bdata.data
+        acnode = AnimationCurveNodeWrapper(cam_key, 'CAMERA_FOCAL', force_key, force_sek, (cam.lens,))
+        animdata_cameras[cam_key] = (acnode, cam)
+
     currframe = f_start
     while currframe <= f_end:
         real_currframe = currframe - f_start if start_zero else currframe
@@ -1927,6 +1934,8 @@ def fbx_animations_do(scene_data, ref_id, f_start, f_end, start_zero, objects=No
             ob_obj.dupli_list_clear()
         for anim_shape, me, shape in animdata_shapes.values():
             anim_shape.add_keyframe(real_currframe, (shape.value * 100.0,))
+        for anim_camera, camera in animdata_cameras.values():
+            anim_camera.add_keyframe(real_currframe, (camera.lens,))
         currframe += bake_step
 
     scene.frame_set(back_currframe, 0.0)
@@ -1958,6 +1967,18 @@ def fbx_animations_do(scene_data, ref_id, f_start, f_end, start_zero, objects=No
                     anim_data = animations[elem_key] = ("dummy_unused_key", OrderedDict())
                 anim_data[1][fbx_group] = (group_key, group, fbx_gname)
 
+    # And cameras' lens keys.
+    for cam_key, (anim_camera, camera) in animdata_cameras.items():
+        final_keys = OrderedDict()
+        anim_camera.simplify(simplify_fac, bake_step, force_keep)
+        if not anim_camera:
+            continue
+        for elem_key, group_key, group, fbx_group, fbx_gname in anim_camera.get_final_data(scene, ref_id, force_keep):
+                anim_data = animations.get(elem_key)
+                if anim_data is None:
+                    anim_data = animations[elem_key] = ("dummy_unused_key", OrderedDict())
+                anim_data[1][fbx_group] = (group_key, group, fbx_gname)
+
     astack_key = get_blender_anim_stack_key(scene, ref_id)
     alayer_key = get_blender_anim_layer_key(scene, ref_id)
     name = (get_blenderID_name(ref_id) if ref_id else scene.name).encode()