== Transformation Constraint ==

This commit adds a new constraint to Blender: the Transformation Constraint. This constraint gives you more freedom to choose how transforms are copied from one object/bone to another object/bone. 

You can assign the Loc/Rot/Scale channels of a source to the Loc/Rot/Scale channels of a destination, specifying the range of motion (per axis) from the source to consider, and the range of motion (per axis) that will be applied to the destination. Also, for each destination axis, you can choose which of the source axes to copy from. 

A similar constraint was coded by Jason Blary (snark), as Patch #4991. This constraint is basically rewritten from scratch, although there are some elements of the original patch which may be borrowed in future.

Various notes:
* PyAPI access has been coded. 
* Space conversion is also enabled for this constraint.
* Also the useless get_constraint_col function has been removed
* Doing a rotation copy with a ratio that is not 1:1 doesn't always work correctly yet (like for the Copy Rotation constraint).

1 files changed, 27 insertions, 8 deletions

diff --git a/source/blender/src/editconstraint.c b/source/blender/src/editconstraint.c
index db1ee37405f..4ef1b4e961a 100644
--- a/source/blender/src/editconstraint.c
+++ b/source/blender/src/editconstraint.c
@@ -583,6 +583,24 @@ static void test_constraints (Object *owner, const char* substring)
 					}					
 				}
 					break;
+				case CONSTRAINT_TYPE_TRANSFORM:
+				{
+					bTransformConstraint *data = curcon->data;
+					
+					if (!exist_object(data->tar)){
+						data->tar = NULL;
+						curcon->flag |= CONSTRAINT_DISABLE;
+						break;
+					}
+					
+					if ( (data->tar == owner) &&
+						 (!get_named_bone(get_armature(owner), 
+										  data->subtarget))) {
+						curcon->flag |= CONSTRAINT_DISABLE;
+						break;
+					}
+				}
+					break;
 			}
 		}
 	}
@@ -671,21 +689,21 @@ void add_constraint(int only_IK)
 	else {
 		if(pchanact) {
 			if(pchansel)
-				nr= pupmenu("Add Constraint to Active Bone%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
+				nr= pupmenu("Add Constraint to Active Bone%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
 			else if(obsel && obsel->type==OB_CURVE)
-				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|Stretch To%x7|%l|Action%x16|Script%x18");
+				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|Stretch To%x7|%l|Action%x16|Script%x18");
 			else if(obsel)
-				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
+				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
 			else
-				nr= pupmenu("Add Constraint to New Empty Object%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Script%x18");
+				nr= pupmenu("Add Constraint to New Empty Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Script%x18");
 		}
 		else {
 			if(obsel && obsel->type==OB_CURVE)
-				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|%l|Script%x18");
+				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|%l|Script%x18");
 			else if(obsel)
-				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|%l|Script%x18");
+				nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|%l|Script%x18");
 			else
-				nr= pupmenu("Add Constraint to New Empty Object%t|Child Of%x19|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|%l|Script%x18");
+				nr= pupmenu("Add Constraint to New Empty Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|%l|Track To%x3|Floor%x4|Locked Track%x5|%l|Script%x18");
 		}
 	}
 	
@@ -773,7 +791,7 @@ void add_constraint(int only_IK)
 			}
 		}
 		else if (nr==19) {
-			con= add_new_constraint(CONSTRAINT_TYPE_CHILDOF);
+			con = add_new_constraint(CONSTRAINT_TYPE_CHILDOF);
 			
 			/* if this constraint is being added to a posechannel, make sure
 			 * the constraint gets evaluated in pose-space
@@ -783,6 +801,7 @@ void add_constraint(int only_IK)
 				con->flag |= CONSTRAINT_SPACEONCE;
 			}
 		}
+		else if (nr==20) con = add_new_constraint(CONSTRAINT_TYPE_TRANSFORM);
 		
 		if (con==NULL) return;	/* paranoia */