Add Chromium-only Blender WebEngine parity work

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

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+/* SPDX-FileCopyrightText: Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+#pragma once
+
+/** \file
+ * \ingroup bke
+ */
+
+#include "BLI_math_vector_types.hh"
+
+#include "DNA_listBase.h"
+
+namespace blender {
+
+struct BVHTree;
+struct Collection;
+struct CollisionModifierData;
+struct Depsgraph;
+struct ListBase;
+struct Object;
+
+/* -------------------------------------------------------------------- */
+/** \name Collision Data Types
+ *
+ * Used for collisions in `collision.cc`.
+ * \{ */
+
+/* COLLISION FLAGS */
+enum COLLISION_FLAGS {
+  COLLISION_IN_FUTURE = (1 << 1),
+#ifdef WITH_ELTOPO
+  COLLISION_USE_COLLFACE = (1 << 2),
+  COLLISION_IS_EDGES = (1 << 3),
+#endif
+  COLLISION_INACTIVE = (1 << 4),
+};
+
+struct CollPair {
+  unsigned int face1; /* cloth face */
+  unsigned int face2; /* object face */
+  float distance;
+  float normal[3];
+  float vector[3];    /* unnormalized collision vector: p2-p1 */
+  float pa[3], pb[3]; /* collision point p1 on face1, p2 on face2 */
+  int flag;
+  float time; /* collision time, from 0 up to 1 */
+
+  /* mesh-mesh collision */
+#ifdef WITH_ELTOPO /* Either ap* or bp* can be set, but not both. */
+  float bary[3];
+  int ap1, ap2, ap3, collp, bp1, bp2, bp3;
+  int collface;
+#else
+  int ap1, ap2, ap3, bp1, bp2, bp3;
+#endif
+  /* Barycentric weights of the collision point. */
+  float aw1, aw2, aw3, bw1, bw2, bw3;
+  int pointsb[4];
+};
+
+struct EdgeCollPair {
+  unsigned int p11, p12, p21, p22;
+  float normal[3];
+  float vector[3];
+  float time;
+  int lastsign;
+  float pa[3], pb[3]; /* collision point p1 on face1, p2 on face2 */
+};
+
+struct FaceCollPair {
+  unsigned int p11, p12, p13, p21;
+  float normal[3];
+  float vector[3];
+  float time;
+  int lastsign;
+  float pa[3], pb[3]; /* collision point p1 on face1, p2 on face2 */
+};
+
+/** \} */
+
+/* Forward declarations. */
+
+/* -------------------------------------------------------------------- */
+/** \name BVH Tree Utilities
+ *
+ *  Used in `modifier.cc` from `collision.cc`.
+ * \{ */
+struct BVHTree *bvhtree_build_from_mvert(const float (*positions)[3],
+                                         const int3 *vert_tris,
+                                         int tri_num,
+                                         float epsilon);
+void bvhtree_update_from_mvert(struct BVHTree *bvhtree,
+                               const float (*positions)[3],
+                               const float (*positions_moving)[3],
+                               const int3 *vert_tris,
+                               int tri_num,
+                               bool moving);
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Collision Modifier Data
+ * \{ */
+
+/**
+ * Move Collision modifier object inter-frame with step = [0,1]
+ *
+ * \param step: is limited from 0 (frame start position) to 1 (frame end position).
+ */
+void collision_move_object(struct CollisionModifierData *collmd,
+                           float step,
+                           float prevstep,
+                           bool moving_bvh);
+
+void collision_get_collider_velocity(float vel_old[3],
+                                     float vel_new[3],
+                                     struct CollisionModifierData *collmd,
+                                     struct CollPair *collpair);
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Collision Relations
+ *
+ * Collision relations for dependency graph build.
+ * \{ */
+
+struct CollisionRelation {
+  struct CollisionRelation *next, *prev;
+  struct Object *ob;
+};
+
+/**
+ * Create list of collision relations in the collection or entire scene.
+ * This is used by the depsgraph to build relations, as well as faster
+ * lookup of colliders during evaluation.
+ */
+ListBaseT<CollisionRelation> *BKE_collision_relations_create(struct Depsgraph *depsgraph,
+                                                             struct Collection *collection,
+                                                             unsigned int modifier_type);
+void BKE_collision_relations_free(ListBaseT<CollisionRelation> *relations);
+
+/* Collision object lists for physics simulation evaluation. */
+
+/**
+ * Create effective list of colliders from relations built beforehand.
+ * Self will be excluded.
+ */
+struct Object **BKE_collision_objects_create(struct Depsgraph *depsgraph,
+                                             struct Object *self,
+                                             struct Collection *collection,
+                                             unsigned int *numcollobj,
+                                             unsigned int modifier_type);
+void BKE_collision_objects_free(struct Object **objects);
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Collision Cache
+ * \{ */
+
+struct ColliderCache {
+  struct ColliderCache *next, *prev;
+  struct Object *ob;
+  struct CollisionModifierData *collmd;
+};
+
+/**
+ * Create effective list of colliders from relations built beforehand.
+ * Self will be excluded.
+ */
+ListBaseT<ColliderCache> *BKE_collider_cache_create(struct Depsgraph *depsgraph,
+                                                    struct Object *self,
+                                                    struct Collection *collection);
+void BKE_collider_cache_free(ListBaseT<ColliderCache> **colliders);
+
+/** \} */
+
+}  // namespace blender