Commit: a92fc348f46755c34023eff4fc1d7f467241c616
Author: Campbell Barton
Date: Fri Jul 8 10:18:40 2016 +1000
Branches: master
https://developer.blender.org/rBa92fc348f46755c34023eff4fc1d7f467241c616
Fix/Workaround non-uniform scaled bones failing w/ IK solver
Scaling a bone on the Y axis (for a stretch effect), wasn't supported by the IK
solver.
Support this by solving as uniform scaled bones by matching the X,Z axis to the
Y.
Requested by @pepeland, see D2088 for details.
===================================================================
M source/blender/ikplugin/intern/iksolver_plugin.c
===================================================================
diff --git a/source/blender/ikplugin/intern/iksolver_plugin.c
b/source/blender/ikplugin/intern/iksolver_plugin.c
index b3c83bf..30dd5e4 100644
--- a/source/blender/ikplugin/intern/iksolver_plugin.c
+++ b/source/blender/ikplugin/intern/iksolver_plugin.c
@@ -50,6 +50,8 @@
#include <string.h> /* memcpy */
+#define USE_NONUNIFORM_SCALE
+
/* ********************** THE IK SOLVER ******************* */
/* allocates PoseTree, and links that to root bone/channel */
@@ -542,6 +544,19 @@ void iksolver_execute_tree(struct Scene *scene, struct
Object *ob, struct bPose
/* tell blender that this channel was controlled by IK,
it's cleared on each BKE_pose_where_is() */
tree->pchan[a]->flag |= POSE_CHAIN;
}
+
+#ifdef USE_NONUNIFORM_SCALE
+ float (*pchan_scale_data)[3] = MEM_mallocN(sizeof(float[3]) *
tree->totchannel, __func__);
+
+ for (a = 0; a < tree->totchannel; a++) {
+ mat4_to_size(pchan_scale_data[a],
tree->pchan[a]->pose_mat);
+
+ /* make uniform at y scale since this controls the
length */
+ normalize_v3_length(tree->pchan[a]->pose_mat[0],
pchan_scale_data[a][1]);
+ normalize_v3_length(tree->pchan[a]->pose_mat[2],
pchan_scale_data[a][1]);
+ }
+#endif
+
/* 5. execute the IK solver */
execute_posetree(scene, ob, tree);
@@ -556,6 +571,14 @@ void iksolver_execute_tree(struct Scene *scene, struct
Object *ob, struct bPose
where_is_ik_bone(tree->pchan[a], tree->basis_change[a]);
}
+#ifdef USE_NONUNIFORM_SCALE
+ for (a = 0; a < tree->totchannel; a++) {
+ normalize_v3_length(pchan->pose_mat[0],
pchan_scale_data[a][0]);
+ normalize_v3_length(pchan->pose_mat[2],
pchan_scale_data[a][2]);
+ }
+ MEM_freeN(pchan_scale_data);
+#endif
+
/* 7. and free */
BLI_remlink(&pchan->iktree, tree);
free_posetree(tree);
_______________________________________________
Bf-blender-cvs mailing list
[email protected]
https://lists.blender.org/mailman/listinfo/bf-blender-cvs
