From e623d073628120b427994e0c45206a5ee4dd1915 Mon Sep 17 00:00:00 2001
From: Sergey Sharybin <sergey@blender.org>
Date: Fri, 3 Nov 2023 15:41:05 +0100
Subject: [PATCH] Fix missing relations built for camera referenced by markers

A missing part since PR #110139: the nodes and relations builders
needs to be in-sync and build the same objects. The relations builder
was missing relations building for camera referenced by markers.

Pull Request: https://projects.blender.org/blender/blender/pulls/114443
---
 .../depsgraph/intern/builder/deg_builder_relations.h |  1 +
 .../intern/builder/deg_builder_relations_scene.cc    | 12 ++++++++++++
 .../builder/deg_builder_relations_view_layer.cc      |  4 +---
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.h b/source/blender/depsgraph/intern/builder/deg_builder_relations.h
index 4eafd66b0c0..1c2ba7298e2 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.h
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.h
@@ -125,6 +125,7 @@ class DepsgraphRelationBuilder : public DepsgraphBuilder {
 
   virtual void build_idproperties(IDProperty *id_property);
 
+  virtual void build_scene_camera(Scene *scene);
   virtual void build_scene_render(Scene *scene, ViewLayer *view_layer);
   virtual void build_scene_parameters(Scene *scene);
   virtual void build_scene_compositor(Scene *scene);
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations_scene.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations_scene.cc
index 0b117867c9f..166607a6d45 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations_scene.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations_scene.cc
@@ -32,6 +32,18 @@ void DepsgraphRelationBuilder::build_scene_render(Scene *scene, ViewLayer *view_
   }
 }
 
+void DepsgraphRelationBuilder::build_scene_camera(Scene *scene)
+{
+  if (scene->camera != nullptr) {
+    build_object(scene->camera);
+  }
+  LISTBASE_FOREACH (TimeMarker *, marker, &scene->markers) {
+    if (!ELEM(marker->camera, nullptr, scene->camera)) {
+      build_object(marker->camera);
+    }
+  }
+}
+
 void DepsgraphRelationBuilder::build_scene_parameters(Scene *scene)
 {
   if (built_map_.checkIsBuiltAndTag(scene, BuilderMap::TAG_PARAMETERS)) {
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc
index 287050ebe01..203d26bd346 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc
@@ -118,9 +118,7 @@ void DepsgraphRelationBuilder::build_view_layer(Scene *scene,
 
   build_view_layer_collections(view_layer);
 
-  if (scene->camera != nullptr) {
-    build_object(scene->camera);
-  }
+  build_scene_camera(scene);
   /* Rigidbody. */
   if (scene->rigidbody_world != nullptr) {
     build_rigidbody(scene);