Render: camera depth of field support for armature bone targets

This is useful when using an armature as a camera rig, to avoid creating and
targetting an empty object.

Differential Revision: https://developer.blender.org/D7012

2 files changed, 12 insertions, 1 deletions

diff --git a/intern/cycles/blender/addon/ui.py b/intern/cycles/blender/addon/ui.py
index 3c898d4be73..0fead409866 100644
--- a/intern/cycles/blender/addon/ui.py
+++ b/intern/cycles/blender/addon/ui.py
@@ -952,6 +952,8 @@ class CYCLES_CAMERA_PT_dof(CyclesButtonsPanel, Panel):
 
         col = split.column()
         col.prop(dof, "focus_object", text="Focus Object")
+        if dof.focus_object and dof.focus_object.type == 'ARMATURE':
+            col.prop_search(dof, "focus_subtarget", dof.focus_object.data, "bones", text="Focus Bone")
 
         sub = col.row()
         sub.active = dof.focus_object is None
diff --git a/intern/cycles/blender/camera.cpp b/intern/cycles/blender/camera.cpp
index 2ab5f02a337..6926c833096 100644
--- a/intern/cycles/blender/camera.cpp
+++ b/intern/cycles/blender/camera.cpp
@@ -143,11 +143,20 @@ static float blender_camera_focal_distance(BL::RenderEngine &b_engine,
   if (!b_dof_object)
     return b_camera.dof().focus_distance();
 
+  Transform dofmat = get_transform(b_dof_object.matrix_world());
+
+  string focus_subtarget = b_camera.dof().focus_subtarget();
+  if (b_dof_object.pose() && !focus_subtarget.empty()) {
+    BL::PoseBone b_bone = b_dof_object.pose().bones[focus_subtarget];
+    if (b_bone) {
+      dofmat = dofmat * get_transform(b_bone.matrix());
+    }
+  }
+
   /* for dof object, return distance along camera Z direction */
   BL::Array<float, 16> b_ob_matrix;
   b_engine.camera_model_matrix(b_ob, bcam->use_spherical_stereo, b_ob_matrix);
   Transform obmat = transform_clear_scale(get_transform(b_ob_matrix));
-  Transform dofmat = get_transform(b_dof_object.matrix_world());
   float3 view_dir = normalize(transform_get_column(&obmat, 2));
   float3 dof_dir = transform_get_column(&obmat, 3) - transform_get_column(&dofmat, 3);
   return fabsf(dot(view_dir, dof_dir));