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== Clamp-To Constraint (was Patch #4818) ==

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This (new) constraint limits the location of an object/bone to the range of locations
on a given curve. It works by comparing the location of the owner on one axis, to
the extents of the curve's bounding-box on the same axis, to find the location on
the curve.

Usage Notes:
* 'Ob:' field must point to a valid curve object
* This curve should have 'Path' turned on in order for this constraint to work. You
don't really need to do this as it will be taken care of by the code.
* 'Auto' toggle automically determines which axis should be used for the distance estimations/calculations. It is the default option, but may not work that well for
some cases.
* X/Y/Z toggles can be used to select the axis to use for these calculations. Try
to choose the axis along which the curve stretches out for most.

Python Notes:
Python API access for this constraint is not included in this commit. Will be coming
soon.
This commit is contained in:
Joshua Leung
2007-04-07 03:32:57 +00:00
parent 999e405543
commit 655f9a61de
7 changed files with 227 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
source/blender/src/editconstraint.c
View File

@@ -313,6 +313,12 @@ char *get_con_subtarget_name(bConstraint *con, Object *target)
return NULL;
}
break;
case CONSTRAINT_TYPE_CLAMPTO:
{
/* cannot have subtarget. if followpath is removed from here, remove this too... */
return NULL;
}
break;
}
return NULL;
@@ -571,6 +577,29 @@ static void test_constraints (Object *owner, const char* substring)
}
}
break;
case CONSTRAINT_TYPE_CLAMPTO:
{
bClampToConstraint *data = curcon->data;
if (!exist_object(data->tar)){
data->tar = NULL;
curcon->flag |= CONSTRAINT_DISABLE;
break;
}
if (data->tar->type != OB_CURVE){
data->tar = NULL;
curcon->flag |= CONSTRAINT_DISABLE;
break;
}
else {
Curve *cu= data->tar->data;
/* auto-set 'Path' setting on curve so this works */
cu->flag |= CU_PATH;
}
}
break;
}
}
}
@@ -661,7 +690,7 @@ void add_constraint(int only_IK)
if(pchansel)
nr= pupmenu("Add Constraint to Active Bone%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|Action%x16");
else if(obsel && obsel->type==OB_CURVE)
nr= pupmenu("Add Constraint to Active Object%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Stretch To%x7|Action%x16");
nr= pupmenu("Add Constraint to Active Object%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|Stretch To%x7|Action%x16");
else if(obsel)
nr= pupmenu("Add Constraint to Active Object%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|Action%x16");
else
@@ -669,7 +698,7 @@ void add_constraint(int only_IK)
}
else {
if(obsel && obsel->type==OB_CURVE)
nr= pupmenu("Add Constraint to Active Object%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6");
nr= pupmenu("Add Constraint to Active Object%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17");
else if(obsel)
nr= pupmenu("Add Constraint to Active Object%t|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Track To%x3|Floor%x4|Locked Track%x5");
else
@@ -728,6 +757,11 @@ void add_constraint(int only_IK)
else if(nr==14) con = add_new_constraint(CONSTRAINT_TYPE_ROTLIMIT);
else if(nr==15) con = add_new_constraint(CONSTRAINT_TYPE_SIZELIMIT);
else if(nr==16) con = add_new_constraint(CONSTRAINT_TYPE_ACTION);
else if(nr==17) {
Curve *cu= obsel->data;
cu->flag |= CU_PATH;
con = add_new_constraint(CONSTRAINT_TYPE_CLAMPTO)
}
if(con==NULL) return; /* paranoia */