Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/blenkernel/BKE_kelvinlet.h

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+/* SPDX-FileCopyrightText: Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+#pragma once
+
+/** \file
+ * \ingroup bke
+ */
+
+namespace blender {
+
+/* Regularized Kelvinlets: Sculpting Brushes based on Fundamental Solutions of Elasticity
+ * Pixar Technical Memo #17-03 */
+
+#define KELVINLET_MAX_ITERATIONS 3
+
+struct KelvinletParams {
+  float a;
+  float b;
+  float c;
+
+  float f;
+
+  float radius_scaled[KELVINLET_MAX_ITERATIONS];
+};
+
+/* Initialize KelvinletParams to store the parameters that will affect the deformation produced by
+ * a Kelvinlet */
+void BKE_kelvinlet_init_params(
+    KelvinletParams *params, float radius, float force, float shear_modulus, float poisson_ratio);
+
+/* Regularized Kelvinlets */
+/* All these functions output the displacement that should be applied to each element. */
+/* The initial coordinates of that element should not be modified during the transformation */
+void BKE_kelvinlet_grab(float radius_elem_disp[3],
+                        const KelvinletParams *params,
+                        const float elem_orig_co[3],
+                        const float brush_location[3],
+                        const float brush_delta[3]);
+void BKE_kelvinlet_grab_biscale(float radius_elem_disp[3],
+                                const KelvinletParams *params,
+                                const float elem_orig_co[3],
+                                const float brush_location[3],
+                                const float brush_delta[3]);
+void BKE_kelvinlet_grab_triscale(float radius_elem_disp[3],
+                                 const KelvinletParams *params,
+                                 const float elem_orig_co[3],
+                                 const float brush_location[3],
+                                 const float brush_delta[3]);
+void BKE_kelvinlet_scale(float radius_elem_disp[3],
+                         const KelvinletParams *params,
+                         const float elem_orig_co[3],
+                         const float brush_location[3],
+                         const float surface_normal[3]);
+void BKE_kelvinlet_twist(float radius_elem_disp[3],
+                         const KelvinletParams *params,
+                         const float elem_orig_co[3],
+                         const float brush_location[3],
+                         const float surface_normal[3]);
+
+}  // namespace blender