diff --git a/source/blender/editors/transform/transform.h b/source/blender/editors/transform/transform.h
index e5bd405c0cd..2ff6d6d3dce 100644
--- a/source/blender/editors/transform/transform.h
+++ b/source/blender/editors/transform/transform.h
@@ -210,6 +210,7 @@ typedef struct MouseInput {
 	short	precision_mval[2];	/* mouse position when precision key was pressed */
 	int		center[2];
 	float	factor;
+	void 	*data; /* additional data, if needed by the particular function */
 } MouseInput;
 
 typedef struct TransInfo {
@@ -575,7 +576,8 @@ typedef enum {
 	INPUT_HORIZONTAL_RATIO,
 	INPUT_HORIZONTAL_ABSOLUTE,
 	INPUT_VERTICAL_RATIO,
-	INPUT_VERTICAL_ABSOLUTE
+	INPUT_VERTICAL_ABSOLUTE,
+	INPUT_CUSTOM_RATIO
 } MouseInputMode;
 
 void initMouseInput(TransInfo *t, MouseInput *mi, int center[2], short mval[2]);
@@ -583,6 +585,8 @@ void initMouseInputMode(TransInfo *t, MouseInput *mi, MouseInputMode mode);
 int handleMouseInput(struct TransInfo *t, struct MouseInput *mi, struct wmEvent *event);
 void applyMouseInput(struct TransInfo *t, struct MouseInput *mi, short mval[2], float output[3]);
 
+void setCustomPoints(TransInfo *t, MouseInput *mi, short start[2], short end[2]);
+
 /*********************** Generics ********************************/
 
 int initTransInfo(struct bContext *C, TransInfo *t, struct wmOperator *op, struct wmEvent *event);
diff --git a/source/blender/editors/transform/transform_generics.c b/source/blender/editors/transform/transform_generics.c
index 0b7029adde0..d93e92616e1 100644
--- a/source/blender/editors/transform/transform_generics.c
+++ b/source/blender/editors/transform/transform_generics.c
@@ -1052,7 +1052,7 @@ void postTrans (TransInfo *t)
 		}
 		MEM_freeN(t->data);
 	}
-
+	
 	if (t->ext) MEM_freeN(t->ext);
 	if (t->data2d) {
 		MEM_freeN(t->data2d);
@@ -1068,6 +1068,11 @@ void postTrans (TransInfo *t)
 		if (t->customData)
 			MEM_freeN(t->customData);
 	}
+
+	if (t->mouse.data)
+	{
+		MEM_freeN(t->mouse.data);
+	}
 }
 
 void applyTransObjects(TransInfo *t)
diff --git a/source/blender/editors/transform/transform_input.c b/source/blender/editors/transform/transform_input.c
index 6bd0a8c8d42..e1e4569623b 100644
--- a/source/blender/editors/transform/transform_input.c
+++ b/source/blender/editors/transform/transform_input.c
@@ -163,6 +163,47 @@ void InputVerticalAbsolute(TransInfo *t, MouseInput *mi, short mval[2], float ou
 	output[0] = Inpf(t->viewinv[1], vec) * 2.0f;
 }
 
+void setCustomPoints(TransInfo *t, MouseInput *mi, short start[2], short end[2])
+{
+	short *data = mi->data;
+	
+	data[0] = start[0];
+	data[1] = start[1];
+	data[2] = end[0];
+	data[3] = end[1];
+}
+
+void InputCustomRatio(TransInfo *t, MouseInput *mi, short mval[2], float output[3])
+{
+	float length;
+	float distance;
+	short *data = mi->data;
+	short dx, dy;
+	
+	dx = data[2] - data[0];
+	dy = data[3] - data[1];
+	
+	length = (float)sqrtf(dx*dx + dy*dy);
+	
+	if (mi->precision) {
+		/* deal with Shift key by adding motion / 10 to motion before shift press */
+		short mdx, mdy;
+		mdx = (mi->precision_mval[0] + (float)(mval[0] - mi->precision_mval[0]) / 10.0f) - data[2];
+		mdy = (mi->precision_mval[1] + (float)(mval[1] - mi->precision_mval[1]) / 10.0f) - data[3];
+		
+		distance = (mdx*dx + mdy*dy) / length;
+	}
+	else {
+		short mdx, mdy;
+		mdx = mval[0] - data[2];
+		mdy = mval[1] - data[3];
+		
+		distance = (mdx*dx + mdy*dy) / length;
+	}
+
+	output[0] = distance / length;
+}
+
 void InputAngle(TransInfo *t, MouseInput *mi, short mval[2], float output[3])
 {
 	double dx2 = mval[0] - mi->center[0];
@@ -291,6 +332,11 @@ void initMouseInputMode(TransInfo *t, MouseInput *mi, MouseInputMode mode)
 		mi->apply = InputVerticalAbsolute;
 		t->helpline = HLP_VARROW;
 		break;
+	case INPUT_CUSTOM_RATIO:
+		mi->apply = InputCustomRatio;
+		t->helpline = HLP_NONE;
+		mi->data = MEM_callocN(sizeof(short) * 4, "custom points");
+		break;
 	case INPUT_NONE:
 	default:
 		mi->apply = NULL;