Merge branch 'master' into geometry-nodes-iterative-cachegeometry-nodes-rigid-body-integration

1 files changed, 53 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_crazyspace.hh b/source/blender/blenkernel/BKE_crazyspace.hh
new file mode 100644
index 00000000000..adebf0b7884
--- /dev/null
+++ b/source/blender/blenkernel/BKE_crazyspace.hh
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup bke
+ */
+
+#pragma once
+
+#include "BLI_float3x3.hh"
+#include "BLI_math_vec_types.hh"
+#include "BLI_span.hh"
+
+struct Depsgraph;
+struct Object;
+
+namespace blender::bke::crazyspace {
+
+/**
+ * Contains information about how points have been deformed during evaluation.
+ * This allows mapping edits on evaluated data back to original data in some cases.
+ */
+struct GeometryDeformation {
+  /**
+   * Positions of the deformed points. This may also point to the original position if no
+   * deformation data is available.
+   */
+  Span<float3> positions;
+  /**
+   * Matrices that transform point translations on original data into corresponding translations in
+   * evaluated data. This may be empty if not available.
+   */
+  Span<float3x3> deform_mats;
+
+  float3 translation_from_deformed_to_original(const int position_i,
+                                               const float3 &translation) const
+  {
+    if (this->deform_mats.is_empty()) {
+      return translation;
+    }
+    const float3x3 &deform_mat = this->deform_mats[position_i];
+    return deform_mat.inverted() * translation;
+  }
+};
+
+/**
+ * During evaluation of the object, deformation data may have been generated for this object. This
+ * function either retrieves the deformation data from the evaluated object, or falls back to
+ * returning the original data.
+ */
+GeometryDeformation get_evaluated_curves_deformation(const Depsgraph &depsgraph,
+                                                     const Object &ob_orig);
+
+}  // namespace blender::bke::crazyspace