Tweaks to bevel and crease transform

They were using INPUT_SPRING in a way which didn't allow
it to easily redo the operator because INPUT_SPRING internally
is stored as a ration between old value and new one and crease
and bevel were converting this to value delta.

Now made it special input type INPUT_SPRING_DELTA which is
storing delta of the spring, meaning now values in the redo
panel kind of makes sense -- they mean how much to add/remove
to the crease/bevel weight.

Expect to be no functional changes from interactive transform
POV, just a bit more convenient to use redo panel.

1 files changed, 11 insertions, 0 deletions

diff --git a/source/blender/editors/transform/transform_input.c b/source/blender/editors/transform/transform_input.c
index 70b565859f3..6546a05aedd 100644
--- a/source/blender/editors/transform/transform_input.c
+++ b/source/blender/editors/transform/transform_input.c
@@ -94,6 +94,12 @@ static void InputSpringFlip(TransInfo *t, MouseInput *mi, const int mval[2], flo
 	}
 }
 
+static void InputSpringDelta(TransInfo *t, MouseInput *mi, const int mval[2], float output[3])
+{
+	InputSpring(t, mi, mval, output);
+	output[0] -= 1.0f;
+}
+
 static void InputTrackBall(TransInfo *UNUSED(t), MouseInput *mi, const int mval[2], float output[3])
 {
 
@@ -333,6 +339,11 @@ void initMouseInputMode(TransInfo *t, MouseInput *mi, MouseInputMode mode)
 			mi->apply = InputSpringFlip;
 			t->helpline = HLP_SPRING;
 			break;
+		case INPUT_SPRING_DELTA:
+			calcSpringFactor(mi);
+			mi->apply = InputSpringDelta;
+			t->helpline = HLP_SPRING;
+			break;
 		case INPUT_ANGLE:
 			mi->data = MEM_callocN(sizeof(double), "angle accumulator");
 			mi->apply = InputAngle;