[Bf-blender-cvs] [9b4345d718e] temp-angavrilov: Armature: apply Y scale to B-Bone segments.
Alexander Gavrilov
noreply at git.blender.org
Sat Dec 11 16:25:28 CET 2021
Commit: 9b4345d718e972ff33fb9f9a4e8d4d0e68b628a8
Author: Alexander Gavrilov
Date: Tue Jun 15 13:52:23 2021 +0300
Branches: temp-angavrilov
https://developer.blender.org/rB9b4345d718e972ff33fb9f9a4e8d4d0e68b628a8
Armature: apply Y scale to B-Bone segments.
This fixes a strange behavior where the segments were not actually
scaled in the Y direction to match their actual length, thus
producing gaps or overlap depending on the shape of the curve. For
transformation the change should be very small if enough segments
are used, but this will affect the results of the Copy Transforms
and Armature constraints, so a backwards compatibility option is
provided. Newly created bones default to the new behavior.
===================================================================
M release/scripts/startup/bl_ui/properties_data_bone.py
M source/blender/blenkernel/BKE_armature.h
M source/blender/blenkernel/intern/armature.c
M source/blender/draw/engines/overlay/overlay_armature.c
M source/blender/makesdna/DNA_armature_types.h
M source/blender/makesrna/intern/rna_armature.c
===================================================================
diff --git a/release/scripts/startup/bl_ui/properties_data_bone.py b/release/scripts/startup/bl_ui/properties_data_bone.py
index 1a00150d6d2..89faea7bb96 100644
--- a/release/scripts/startup/bl_ui/properties_data_bone.py
+++ b/release/scripts/startup/bl_ui/properties_data_bone.py
@@ -178,6 +178,8 @@ class BONE_PT_curved(BoneButtonsPanel, Panel):
col.prop(bbone, "bbone_easeout", text="Out")
col.prop(bone, "use_scale_easing")
+ topcol.prop(bone, "use_unscaled_segments")
+
col = topcol.column(align=True)
col.prop(bone, "bbone_handle_type_start", text="Start Handle")
diff --git a/source/blender/blenkernel/BKE_armature.h b/source/blender/blenkernel/BKE_armature.h
index fcba7d9d365..d927c10a933 100644
--- a/source/blender/blenkernel/BKE_armature.h
+++ b/source/blender/blenkernel/BKE_armature.h
@@ -457,7 +457,7 @@ typedef struct BBoneSplineParameters {
float length;
/* Non-uniform scale correction. */
- bool do_scale;
+ bool do_scale, do_scale_segments;
float scale[3];
/* Handle control bone data. */
diff --git a/source/blender/blenkernel/intern/armature.c b/source/blender/blenkernel/intern/armature.c
index 6701575ee9e..58adbbd453f 100644
--- a/source/blender/blenkernel/intern/armature.c
+++ b/source/blender/blenkernel/intern/armature.c
@@ -964,6 +964,8 @@ void BKE_pchan_bbone_spline_params_get(struct bPoseChannel *pchan,
param->segments = bone->segments;
param->length = bone->length;
+ param->do_scale_segments = (bone->bbone_flag & BBONE_SCALE_SEGMENTS) != 0;
+
if (!rest) {
float scale[3];
@@ -1329,6 +1331,7 @@ static void make_bbone_spline_matrix(BBoneSplineParameters *param,
const float axis[3],
float roll,
float scalex,
+ float scaley,
float scalez,
float result[4][4])
{
@@ -1346,6 +1349,7 @@ static void make_bbone_spline_matrix(BBoneSplineParameters *param,
/* BBone scale... */
mul_v3_fl(result[0], scalex);
+ mul_v3_fl(result[1], scaley);
mul_v3_fl(result[2], scalez);
}
@@ -1410,6 +1414,8 @@ int BKE_pchan_bbone_spline_compute(BBoneSplineParameters *param,
equalize_cubic_bezier(
bezt_controls, MAX_BBONE_SUBDIV, param->segments, segment_scales, bezt_points);
+ const float scale_fac = param->segments / length;
+
/* Deformation uses N+1 matrices computed at points between the segments. */
if (for_deform) {
/* Bezier derivatives. */
@@ -1422,6 +1428,32 @@ int BKE_pchan_bbone_spline_compute(BBoneSplineParameters *param,
sub_v3_v3v3(bezt_deriv2[i], bezt_deriv1[i + 1], bezt_deriv1[i]);
}
+ /* Inner segment points. */
+ float points[MAX_BBONE_SUBDIV][3], tangents[MAX_BBONE_SUBDIV][3];
+
+ copy_v3_v3(points[0], bezt_controls[0]);
+
+ for (int a = 1; a < param->segments; a++) {
+ evaluate_cubic_bezier(bezt_controls, bezt_points[a], points[a], tangents[a]);
+ }
+
+ /* Segment lengths. */
+ float seg_length[MAX_BBONE_SUBDIV + 1];
+
+ if (param->do_scale_segments) {
+ for (int a = 1; a < param->segments; a++) {
+ seg_length[a] = len_v3v3(points[a - 1], points[a]) * scale_fac;
+ }
+
+ seg_length[param->segments] = len_v3v3(points[param->segments - 1], bezt_controls[3]) *
+ scale_fac;
+ }
+ else {
+ for (int a = 1; a <= param->segments; a++) {
+ seg_length[a] = 1;
+ }
+ }
+
/* End points require special handling to fix zero length handles. */
ease_handle_axis(bezt_deriv1[0], bezt_deriv2[0], axis);
make_bbone_spline_matrix(param,
@@ -1430,19 +1462,26 @@ int BKE_pchan_bbone_spline_compute(BBoneSplineParameters *param,
axis,
roll1,
param->scale_in[0],
+ seg_length[1],
param->scale_in[2],
result_array[0].mat);
for (int a = 1; a < param->segments; a++) {
- evaluate_cubic_bezier(bezt_controls, bezt_points[a], cur, axis);
-
float fac = ((float)a) / param->segments;
float roll = interpf(roll2, roll1, fac);
float scalex = interpf(param->scale_out[0], param->scale_in[0], fac);
float scalez = interpf(param->scale_out[2], param->scale_in[2], fac);
+ float scaley = sqrtf(seg_length[a] * seg_length[a + 1]);
- make_bbone_spline_matrix(
- param, scalemats, cur, axis, roll, scalex, scalez, result_array[a].mat);
+ make_bbone_spline_matrix(param,
+ scalemats,
+ points[a],
+ tangents[a],
+ roll,
+ scalex,
+ scaley,
+ scalez,
+ result_array[a].mat);
}
negate_v3(bezt_deriv2[1]);
@@ -1453,6 +1492,7 @@ int BKE_pchan_bbone_spline_compute(BBoneSplineParameters *param,
axis,
roll2,
param->scale_out[0],
+ seg_length[param->segments],
param->scale_out[2],
result_array[param->segments].mat);
}
@@ -1469,9 +1509,10 @@ int BKE_pchan_bbone_spline_compute(BBoneSplineParameters *param,
float roll = interpf(roll2, roll1, fac);
float scalex = interpf(param->scale_out[0], param->scale_in[0], fac);
float scalez = interpf(param->scale_out[2], param->scale_in[2], fac);
+ float scaley = param->do_scale_segments ? len_v3(axis) * scale_fac : 1;
make_bbone_spline_matrix(
- param, scalemats, prev, axis, roll, scalex, scalez, result_array[a].mat);
+ param, scalemats, prev, axis, roll, scalex, scaley, scalez, result_array[a].mat);
copy_v3_v3(prev, cur);
}
}
diff --git a/source/blender/draw/engines/overlay/overlay_armature.c b/source/blender/draw/engines/overlay/overlay_armature.c
index efd9b21f2e8..cc94f226969 100644
--- a/source/blender/draw/engines/overlay/overlay_armature.c
+++ b/source/blender/draw/engines/overlay/overlay_armature.c
@@ -1105,6 +1105,8 @@ static void ebone_spline_preview(EditBone *ebone, const float result_array[MAX_B
param.segments = ebone->segments;
param.length = ebone->length;
+ param.do_scale_segments = !!(ebone->bbone_flag & BBONE_SCALE_SEGMENTS);
+
/* Get "next" and "prev" bones - these are used for handle calculations. */
if (ebone->bbone_prev_type == BBONE_HANDLE_AUTO) {
/* Use connected parent. */
diff --git a/source/blender/makesdna/DNA_armature_types.h b/source/blender/makesdna/DNA_armature_types.h
index 3b65378f9eb..eff38e837a2 100644
--- a/source/blender/makesdna/DNA_armature_types.h
+++ b/source/blender/makesdna/DNA_armature_types.h
@@ -308,6 +308,8 @@ typedef enum eBone_BBoneFlag {
BBONE_ADD_PARENT_END_ROLL = (1 << 0),
/** Multiply B-Bone easing values with Scale Length. */
BBONE_SCALE_EASING = (1 << 1),
+ /** Apply Y scale to B-Bone segments. */
+ BBONE_SCALE_SEGMENTS = (1 << 2),
} eBone_BBoneFlag;
/* bone->bbone_prev/next_flag */
diff --git a/source/blender/makesrna/intern/rna_armature.c b/source/blender/makesrna/intern/rna_armature.c
index 7a934443907..ef4722ade22 100644
--- a/source/blender/makesrna/intern/rna_armature.c
+++ b/source/blender/makesrna/intern/rna_armature.c
@@ -763,6 +763,15 @@ void rna_def_bone_curved_common(StructRNA *srna, bool is_posebone, bool is_editb
prop, "Scale Easing", "Multiply the final easing values by the Scale In/Out Y factors");
RNA_def_property_boolean_sdna(prop, NULL, "bbone_flag", BBONE_SCALE_EASING);
RNA_DEF_CURVEBONE_UPDATE(prop, is_posebone, is_editbone);
+
+ prop = RNA_def_property(srna, "use_unscaled_segments", PROP_BOOLEAN, PROP_NONE);
+ RNA_def_property_ui_text(prop,
+ "Unscaled Segments (Legacy)",
+ "Do not apply scaling necessary to fit segments to the curve length "
+ "without gaps or overlap for compatibility with old files");
+ RNA_def_property_boolean_negative_sdna(prop, NULL, "bbone_flag", BBONE_SCALE_SEGMENTS);
+ RNA_def_property_clear_flag(prop, PROP_ANIMATABLE);
+ RNA_DEF_CURVEBONE_UPDATE(prop, is_posebone, is_editbone);
}
/* Scale In/Out */
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