- added editbone.matrix, readonly, utility property that calculates the matrix from the bone roll

- spine fixes
- arm now uses the average Z axis to place the poll target

release/scripts/modules/rigify/__init__.py

@@ -359,11 +359,18 @@ def add_pole_target_bone(obj, base_name, name, mode='CROSS'):
     parent_dir = parent_head - parent_tail
 
     distance = (base_dir.length + parent_dir.length)
-
+    
     if mode == 'CROSS':
+        # direction from the angle of the joint
         offset = base_dir.copy().normalize() - parent_dir.copy().normalize()
         offset.length = distance
+    elif mode == 'ZAVERAGE':
+        # between both bones Z axis
+        z_axis_a = base_ebone.matrix.copy().rotationPart() * Vector(0.0, 0.0, -1.0)
+        z_axis_b = parent_ebone.matrix.copy().rotationPart() * Vector(0.0, 0.0, -1.0)
+        offset = (z_axis_a + z_axis_b).normalize() * distance
     else:
+        # preset axis
         offset = Vector(0, 0, 0)
         if mode[0] == "+":
             val = distance

release/scripts/modules/rigify/arm.py

@@ -111,7 +111,7 @@ def ik(obj, definitions, base_names):
     ik_chain.arm_e.parent = mt.shoulder_e
     
     # Add the bone used for the arms poll target
-    ik.pole = add_pole_target_bone(obj, mt.forearm, "elbow_poll", mode='+Z')
+    ik.pole = add_pole_target_bone(obj, mt.forearm, "elbow_poll", mode='ZAVERAGE')
     
     # update bones after this!
     ik.hand_vis = add_stretch_to(obj, mt.hand, ik_chain.hand, "VIS-%s_ik" % base_names[mt.hand])

release/scripts/modules/rigify/spine.py

@@ -178,16 +178,16 @@ def main(obj, bone_definition, base_names):
     df.ribcage_e = copy_bone_simple(arm, child.name, "DEF-wgt_%s" % base_names[mt.ribcage])
     df.ribcage = df.ribcage_e.name
     df.ribcage_e.translate(Vector(spine_chain_segment_length * 2.0, - df.ribcage_e.length / 2.0, 0.0))
+    
+    ex.ribcage_copy_e = copy_bone_simple(arm, mt.ribcage, base_names[mt.ribcage])
+    ex.ribcage_copy = ex.ribcage_copy_e.name
+    ex.ribcage_copy_e.connected = False
+    ex.ribcage_copy_e.parent = ex.ribcage_hinge_e
 
     ex.ribcage_e = copy_bone_simple(arm, child.name, "MCH-wgt_%s" % base_names[mt.ribcage])
     ex.ribcage = ex.ribcage_e.name
     ex.ribcage_e.translate(Vector(0.0, - ex.ribcage_e.length / 2.0, 0.0))
-    ex.ribcage_e.parent = mt.ribcage_e
-
-    ex.ribcage_copy_e = copy_bone_simple(arm, child.name, base_names[mt.ribcage])
-    ex.ribcage_copy = ex.ribcage_copy_e.name
-    ex.ribcage_copy_e.connected = False
-    ex.ribcage_copy_e.parent = ex.ribcage_hinge_e
+    ex.ribcage_e.parent = ex.ribcage_copy_e
 
     spine_chain = [child.name for child in spine_chain]
 
@@ -294,6 +294,8 @@ def main(obj, bone_definition, base_names):
     con.target_space = 'LOCAL'
 
     # df.ribcage_p / DEF-wgt_rib_cage
+    df.ribcage_p.lock_location = True, True, True
+    
     con = df.ribcage_p.constraints.new('COPY_ROTATION')
     con.target = obj
     con.subtarget = ex.ribcage
@@ -329,7 +331,7 @@ def main(obj, bone_definition, base_names):
 
     con = ex.spine_rotate_p.constraints.new('COPY_ROTATION')
     con.target = obj
-    con.subtarget = mt.ribcage
+    con.subtarget = ex.ribcage_copy
 
 
     # ex.pelvis_p / MCH-wgt_pelvis

source/blender/makesrna/intern/rna_armature.c

@@ -43,9 +43,10 @@
 #include "BKE_context.h"
 #include "BKE_depsgraph.h"
 #include "BKE_idprop.h"
-#include "BKE_main.h"
+#include "BKE_main.h""
 
 #include "ED_armature.h"
+#include "BKE_armature.h"
 
 static void rna_Armature_update_data(Main *bmain, Scene *scene, PointerRNA *ptr)
 {
@@ -304,6 +305,21 @@ static void rna_EditBone_parent_set(PointerRNA *ptr, PointerRNA value)
 	}
 }
 
+static void rna_EditBone_matrix_get(PointerRNA *ptr, float *values)
+{
+	EditBone *ebone= (EditBone*)(ptr->data);
+
+	float	delta[3], tmat[3][3], mat[4][4];
+
+	/* Find the current bone matrix */
+	sub_v3_v3v3(delta, ebone->tail, ebone->head);
+	vec_roll_to_mat3(delta, ebone->roll, tmat);
+	copy_m4_m3(mat, tmat);
+	VECCOPY(mat[3], ebone->head);
+
+	memcpy(values, mat, 16 * sizeof(float));
+}
+
 static void rna_Armature_editbone_transform_update(Main *bmain, Scene *scene, PointerRNA *ptr)
 {
 	bArmature *arm= (bArmature*)ptr->id.data;
@@ -618,6 +634,14 @@ static void rna_def_edit_bone(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Tail Selected", "");
 	RNA_def_property_update(prop, 0, "rna_Armature_redraw_data");
 
+	/* calculated and read only, not actual data access */
+	prop= RNA_def_property(srna, "matrix", PROP_FLOAT, PROP_MATRIX);
+	//RNA_def_property_float_sdna(prop, NULL, ""); // doesnt access any real data
+	RNA_def_property_array(prop, 16);
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Editbone Matrix", "Read-only matrix calculated from the roll (armature space).");
+	RNA_def_property_float_funcs(prop, "rna_EditBone_matrix_get", NULL, NULL); // TODO - this could be made writable also
+
 	RNA_api_armature_edit_bone(srna);
 
 	RNA_define_verify_sdna(1);

source/blender/python/intern/bpy_driver.c

@@ -192,7 +192,9 @@ float BPY_pydriver_eval (ChannelDriver *driver)
 			}
 
 			fprintf(stderr, "\tBPY_pydriver_eval() - couldn't add variable '%s' to namespace \n", dtar->name);
-			BPy_errors_to_report(NULL); // TODO - reports
+			// BPy_errors_to_report(NULL); // TODO - reports
+			PyErr_Print();
+			PyErr_Clear();
 		}
 	}