1 files changed, 50 insertions, 0 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_transform.cc b/source/blender/nodes/geometry/nodes/node_geo_transform.cc
index 4fe61dff72d..251fa0866ad 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_transform.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_transform.cc
@@ -14,11 +14,19 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+#ifdef WITH_OPENVDB
+#  include <openvdb/openvdb.h>
+#endif
+
 #include "BLI_math_matrix.h"
 
 #include "DNA_pointcloud_types.h"
+#include "DNA_volume_types.h"
 
 #include "BKE_mesh.h"
+#include "BKE_volume.h"
+
+#include "DEG_depsgraph_query.h"
 
 #include "node_geometry_util.hh"
 
@@ -116,6 +124,43 @@ static void transform_instances(InstancesComponent &instances,
   }
 }
 
+static void transform_volume(Volume *volume,
+                             const float3 translation,
+                             const float3 rotation,
+                             const float3 scale,
+                             GeoNodeExecParams &params)
+{
+#ifdef WITH_OPENVDB
+  /* Scaling an axis to zero is not supported for volumes. */
+  const float3 limited_scale = {
+      (scale.x == 0.0f) ? FLT_EPSILON : scale.x,
+      (scale.y == 0.0f) ? FLT_EPSILON : scale.y,
+      (scale.z == 0.0f) ? FLT_EPSILON : scale.z,
+  };
+
+  Main *bmain = DEG_get_bmain(params.depsgraph());
+  BKE_volume_load(volume, bmain);
+
+  float matrix[4][4];
+  loc_eul_size_to_mat4(matrix, translation, rotation, limited_scale);
+
+  openvdb::Mat4s vdb_matrix;
+  memcpy(vdb_matrix.asPointer(), matrix, sizeof(float[4][4]));
+  openvdb::Mat4d vdb_matrix_d{vdb_matrix};
+
+  const int num_grids = BKE_volume_num_grids(volume);
+  for (const int i : IndexRange(num_grids)) {
+    VolumeGrid *volume_grid = BKE_volume_grid_get(volume, i);
+
+    openvdb::GridBase::Ptr grid = BKE_volume_grid_openvdb_for_write(volume, volume_grid, false);
+    openvdb::math::Transform &grid_transform = grid->transform();
+    grid_transform.postMult(vdb_matrix_d);
+  }
+#else
+  UNUSED_VARS(volume, translation, rotation, scale, params);
+#endif
+}
+
 static void geo_node_transform_exec(GeoNodeExecParams params)
 {
   GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
@@ -138,6 +183,11 @@ static void geo_node_transform_exec(GeoNodeExecParams params)
     transform_instances(instances, translation, rotation, scale);
   }
 
+  if (geometry_set.has_volume()) {
+    Volume *volume = geometry_set.get_volume_for_write();
+    transform_volume(volume, translation, rotation, scale, params);
+  }
+
   params.set_output("Geometry", std::move(geometry_set));
 }
 }  // namespace blender::nodes