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Revert "Constraints: remove special meaning of Local Space for parentless Objects." 

This reverts commit 7728bfd4c4.

Although this brings back an inconsistency in the behaviour of
constraints on objects and bones, people were relying on the old
behaviour, and the new behaviour broke their files.

It is still desired to remove this inconsistency, but it will happen
more gradually.
This commit is contained in:
Sybren A. Stüvel 2020-03-09 10:44:55 +01:00
parent bc6bbe5fac
commit f881162f81
Notes: blender-bot 2023-02-14 07:25:51 +01:00 
Referenced by issue #91117, Copy Rotation object constraint not working in local space
Referenced by issue #86233, 'Transformation' constraint property between two objects does not work if the "Target" object is being evaluated in "Local" space
Referenced by issue #74274, Blender 2.82a proposed revisions
4 changed files with 59 additions and 18 deletions
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8
source/blender/blenkernel/BKE_constraint.h
View File

@ -191,8 +191,12 @@ struct bConstraintOb *BKE_constraints_make_evalob(struct Depsgraph *depsgraph,
short datatype);
void BKE_constraints_clear_evalob(struct bConstraintOb *cob);
void BKE_constraint_mat_convertspace(
struct Object *ob, struct bPoseChannel *pchan, float mat[4][4], short from, short to);
void BKE_constraint_mat_convertspace(struct Object *ob,
struct bPoseChannel *pchan,
float mat[4][4],
short from,
short to,
const bool keep_scale);
void BKE_constraint_target_matrix_get(struct Depsgraph *depsgraph,
struct Scene *scene,

59
source/blender/blenkernel/intern/constraint.c
View File

@ -255,7 +255,7 @@ void BKE_constraints_clear_evalob(bConstraintOb *cob)
* For now, this is only implemented for Objects and PoseChannels.
*/
void BKE_constraint_mat_convertspace(
Object *ob, bPoseChannel *pchan, float mat[4][4], short from, short to)
Object *ob, bPoseChannel *pchan, float mat[4][4], short from, short to, const bool keep_scale)
{
float diff_mat[4][4];
float imat[4][4];
@ -282,7 +282,7 @@ void BKE_constraint_mat_convertspace(
/* use pose-space as stepping stone for other spaces... */
if (ELEM(to, CONSTRAINT_SPACE_LOCAL, CONSTRAINT_SPACE_PARLOCAL)) {
/* call self with slightly different values */
BKE_constraint_mat_convertspace(ob, pchan, mat, CONSTRAINT_SPACE_POSE, to);
BKE_constraint_mat_convertspace(ob, pchan, mat, CONSTRAINT_SPACE_POSE, to, keep_scale);
}
break;
}
@ -318,7 +318,7 @@ void BKE_constraint_mat_convertspace(
/* use pose-space as stepping stone for other spaces */
if (ELEM(to, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_PARLOCAL)) {
/* call self with slightly different values */
BKE_constraint_mat_convertspace(ob, pchan, mat, CONSTRAINT_SPACE_POSE, to);
BKE_constraint_mat_convertspace(ob, pchan, mat, CONSTRAINT_SPACE_POSE, to, keep_scale);
}
break;
}
@ -332,7 +332,7 @@ void BKE_constraint_mat_convertspace(
/* use pose-space as stepping stone for other spaces */
if (ELEM(to, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL)) {
/* call self with slightly different values */
BKE_constraint_mat_convertspace(ob, pchan, mat, CONSTRAINT_SPACE_POSE, to);
BKE_constraint_mat_convertspace(ob, pchan, mat, CONSTRAINT_SPACE_POSE, to, keep_scale);
}
break;
}
@ -348,6 +348,27 @@ void BKE_constraint_mat_convertspace(
invert_m4_m4_safe(imat, diff_mat);
mul_m4_m4m4(mat, imat, mat);
}
else {
/* Local space in this case will have to be defined as local to the owner's
* transform-property-rotated axes. So subtract this rotation component.
*/
/* XXX This is actually an ugly hack, local space of a parent-less object *is* the same as
* global space!
* Think what we want actually here is some kind of 'Final Space', i.e
* . once transformations are applied - users are often confused about this too,
* this is not consistent with bones
* local space either... Meh :|
* --mont29
*/
BKE_object_to_mat4(ob, diff_mat);
if (!keep_scale) {
normalize_m4(diff_mat);
}
zero_v3(diff_mat[3]);
invert_m4_m4_safe(imat, diff_mat);
mul_m4_m4m4(mat, imat, mat);
}
}
else if (from == CONSTRAINT_SPACE_LOCAL && to == CONSTRAINT_SPACE_WORLD) {
/* check that object has a parent - otherwise this won't work */
@ -356,6 +377,19 @@ void BKE_constraint_mat_convertspace(
mul_m4_m4m4(diff_mat, ob->parent->obmat, ob->parentinv);
mul_m4_m4m4(mat, diff_mat, mat);
}
else {
/* Local space in this case will have to be defined as local to the owner's
* transform-property-rotated axes. So add back this rotation component.
*/
/* XXX See comment above for world->local case... */
BKE_object_to_mat4(ob, diff_mat);
if (!keep_scale) {
normalize_m4(diff_mat);
}
zero_v3(diff_mat[3]);
mul_m4_m4m4(mat, diff_mat, mat);
}
}
}
}
@ -541,7 +575,7 @@ static void constraint_target_to_mat4(Object *ob,
/* Case OBJECT */
if (substring[0] == '\0') {
copy_m4_m4(mat, ob->obmat);
BKE_constraint_mat_convertspace(ob, NULL, mat, from, to);
BKE_constraint_mat_convertspace(ob, NULL, mat, from, to, false);
}
/* Case VERTEXGROUP */
/* Current method just takes the average location of all the points in the
@ -554,11 +588,11 @@ static void constraint_target_to_mat4(Object *ob,
*/
else if (ob->type == OB_MESH) {
contarget_get_mesh_mat(ob, substring, mat);
BKE_constraint_mat_convertspace(ob, NULL, mat, from, to);
BKE_constraint_mat_convertspace(ob, NULL, mat, from, to, false);
}
else if (ob->type == OB_LATTICE) {
contarget_get_lattice_mat(ob, substring, mat);
BKE_constraint_mat_convertspace(ob, NULL, mat, from, to);
BKE_constraint_mat_convertspace(ob, NULL, mat, from, to, false);
}
/* Case BONE */
else {
@ -622,7 +656,7 @@ static void constraint_target_to_mat4(Object *ob,
}
/* convert matrix space as required */
BKE_constraint_mat_convertspace(ob, pchan, mat, from, to);
BKE_constraint_mat_convertspace(ob, pchan, mat, from, to, false);
}
}
@ -4051,9 +4085,12 @@ static void shrinkwrap_get_tarmat(struct Depsgraph *UNUSED(depsgraph),
}
/* Transform normal into requested space */
/* Note that in this specific case, we need to keep scaling in non-parented 'local2world'
* object case, because SpaceTransform also takes it into account when handling normals.
* See T42447. */
unit_m4(mat);
BKE_constraint_mat_convertspace(
cob->ob, cob->pchan, mat, CONSTRAINT_SPACE_LOCAL, scon->projAxisSpace);
cob->ob, cob->pchan, mat, CONSTRAINT_SPACE_LOCAL, scon->projAxisSpace, true);
invert_m4(mat);
mul_mat3_m4_v3(mat, no);
@ -5798,7 +5835,7 @@ void BKE_constraints_solve(struct Depsgraph *depsgraph,
/* move owner matrix into right space */
BKE_constraint_mat_convertspace(
cob->ob, cob->pchan, cob->matrix, CONSTRAINT_SPACE_WORLD, con->ownspace);
cob->ob, cob->pchan, cob->matrix, CONSTRAINT_SPACE_WORLD, con->ownspace, false);
/* prepare targets for constraint solving */
BKE_constraint_targets_for_solving_get(depsgraph, con, cob, &targets, ctime);
@ -5817,7 +5854,7 @@ void BKE_constraints_solve(struct Depsgraph *depsgraph,
/* move owner back into worldspace for next constraint/other business */
if ((con->flag & CONSTRAINT_SPACEONCE) == 0) {
BKE_constraint_mat_convertspace(
cob->ob, cob->pchan, cob->matrix, con->ownspace, CONSTRAINT_SPACE_WORLD);
cob->ob, cob->pchan, cob->matrix, con->ownspace, CONSTRAINT_SPACE_WORLD, false);
}
/* Interpolate the enforcement, to blend result of constraint into final owner transform

8
source/blender/blenkernel/intern/fcurve.c
View File

@ -1595,7 +1595,7 @@ static float dvar_eval_locDiff(ChannelDriver *driver, DriverVar *dvar)
/* extract transform just like how the constraints do it! */
copy_m4_m4(mat, pchan->pose_mat);
BKE_constraint_mat_convertspace(
ob, pchan, mat, CONSTRAINT_SPACE_POSE, CONSTRAINT_SPACE_LOCAL);
ob, pchan, mat, CONSTRAINT_SPACE_POSE, CONSTRAINT_SPACE_LOCAL, false);
/* ... and from that, we get our transform */
copy_v3_v3(tmp_loc, mat[3]);
@ -1621,7 +1621,7 @@ static float dvar_eval_locDiff(ChannelDriver *driver, DriverVar *dvar)
/* extract transform just like how the constraints do it! */
copy_m4_m4(mat, ob->obmat);
BKE_constraint_mat_convertspace(
ob, NULL, mat, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL);
ob, NULL, mat, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL, false);
/* ... and from that, we get our transform */
copy_v3_v3(tmp_loc, mat[3]);
@ -1698,7 +1698,7 @@ static float dvar_eval_transChan(ChannelDriver *driver, DriverVar *dvar)
/* just like how the constraints do it! */
copy_m4_m4(mat, pchan->pose_mat);
BKE_constraint_mat_convertspace(
ob, pchan, mat, CONSTRAINT_SPACE_POSE, CONSTRAINT_SPACE_LOCAL);
ob, pchan, mat, CONSTRAINT_SPACE_POSE, CONSTRAINT_SPACE_LOCAL, false);
}
else {
/* specially calculate local matrix, since chan_mat is not valid
@ -1726,7 +1726,7 @@ static float dvar_eval_transChan(ChannelDriver *driver, DriverVar *dvar)
/* just like how the constraints do it! */
copy_m4_m4(mat, ob->obmat);
BKE_constraint_mat_convertspace(
ob, NULL, mat, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL);
ob, NULL, mat, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL, false);
}
else {
/* transforms to matrix */

2
source/blender/makesrna/intern/rna_object_api.c
View File

@ -323,7 +323,7 @@ static void rna_Object_mat_convert_space(Object *ob,
}
}
BKE_constraint_mat_convertspace(ob, pchan, (float(*)[4])mat_ret, from, to);
BKE_constraint_mat_convertspace(ob, pchan, (float(*)[4])mat_ret, from, to, false);
}
static void rna_Object_calc_matrix_camera(Object *ob,