bugfix [#24324] Wrong center for scaling Bezier Curve's handles

slight change to how transform calculates the center of each bezier handle selection.
- selecting both handles but not the knot now uses the mid point between the 2, before it used the handle.
- selecting 1 handle of a curve was still setting td->center to be the knot, now use the handles location only if its selected.

2 files changed, 4 insertions, 8 deletions

diff --git a/source/blender/editors/transform/transform_conversions.c b/source/blender/editors/transform/transform_conversions.c
index 7e74d12941b..5b1813559bb 100644
--- a/source/blender/editors/transform/transform_conversions.c
+++ b/source/blender/editors/transform/transform_conversions.c
@@ -1403,7 +1403,7 @@ static void createTransCurveVerts(bContext *C, TransInfo *t)
 					  ) {
 						VECCOPY(td->iloc, bezt->vec[0]);
 						td->loc= bezt->vec[0];
-						VECCOPY(td->center, bezt->vec[1]);
+						VECCOPY(td->center, bezt->vec[(hide_handles || bezt->f2 & SELECT) ? 1:0]);
 						if (hide_handles) {
 							if(bezt->f2 & SELECT) td->flag= TD_SELECTED;
 							else td->flag= 0;
@@ -1462,7 +1462,7 @@ static void createTransCurveVerts(bContext *C, TransInfo *t)
 					  ) {
 						VECCOPY(td->iloc, bezt->vec[2]);
 						td->loc= bezt->vec[2];
-						VECCOPY(td->center, bezt->vec[1]);
+						VECCOPY(td->center, bezt->vec[(hide_handles || bezt->f2 & SELECT) ? 1:2]);
 						if (hide_handles) {
 							if(bezt->f2 & SELECT) td->flag= TD_SELECTED;
 							else td->flag= 0;
diff --git a/source/blender/editors/transform/transform_manipulator.c b/source/blender/editors/transform/transform_manipulator.c
index 030ad190dc3..f3afd5793bc 100644
--- a/source/blender/editors/transform/transform_manipulator.c
+++ b/source/blender/editors/transform/transform_manipulator.c
@@ -308,7 +308,7 @@ int calc_manipulator_stats(const bContext *C)
 					while(a--) {
 						/* exceptions
 						 * if handles are hidden then only check the center points.
-						 * If 2 or more are selected then only use the center point too.
+						 * If the center knot is selected then only use this as the center point.
 						 */
 						if (cu->drawflag & CU_HIDE_HANDLES) {
 							if (bezt->f2 & SELECT) {
@@ -316,7 +316,7 @@ int calc_manipulator_stats(const bContext *C)
 								totsel++;
 							}
 						}
-						else if ( (bezt->f1 & SELECT) + (bezt->f2 & SELECT) + (bezt->f3 & SELECT) > SELECT ) {
+						else if (bezt->f2 & SELECT) {
 							calc_tw_center(scene, bezt->vec[1]);
 							totsel++;
 						}
@@ -325,10 +325,6 @@ int calc_manipulator_stats(const bContext *C)
 								calc_tw_center(scene, bezt->vec[0]);
 								totsel++;
 							}
-							if(bezt->f2) {
-								calc_tw_center(scene, bezt->vec[1]);
-								totsel++;
-							}
 							if(bezt->f3) {
 								calc_tw_center(scene, bezt->vec[2]);
 								totsel++;