rigidbody: Add point cache support

Add read/write/interpolate functions.

In order to get rigid body point cache id from object it's now required to pass the
scene to BKE_ptcache_ids_from_object().

Rigid body cache is drawn in the orange color of the bullet logo.

2 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index b0f1d3f37ed..edb033e80f8 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -5303,6 +5303,12 @@ static void direct_link_scene(FileData *fd, Scene *sce)
 		rbw->effector_weights = newdataadr(fd, rbw->effector_weights);
 		if (!rbw->effector_weights)
 			rbw->effector_weights = BKE_add_effector_weights(NULL);
+
+		/* link cache */
+		direct_link_pointcache_list(fd, &rbw->ptcaches, &rbw->pointcache, FALSE);
+		/* make sure simulation starts from the beginning after loading file */
+		if (rbw->pointcache)
+			rbw->ltime = rbw->pointcache->startframe;
 	}
 }
 
diff --git a/source/blender/blenloader/intern/writefile.c b/source/blender/blenloader/intern/writefile.c
index da50a05a3d9..ebd752c0118 100644
--- a/source/blender/blenloader/intern/writefile.c
+++ b/source/blender/blenloader/intern/writefile.c
@@ -2307,6 +2307,7 @@ static void write_scenes(WriteData *wd, ListBase *scebase)
 		if (sce->rigidbody_world) {
 			writestruct(wd, DATA, "RigidBodyWorld", 1, sce->rigidbody_world);
 			writestruct(wd, DATA, "EffectorWeights", 1, sce->rigidbody_world->effector_weights);
+			write_pointcaches(wd, &(sce->rigidbody_world->ptcaches));
 		}
 		
 		sce= sce->id.next;