From f8317ed450e8e1649b4b23215417ad3e5b8d607c Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Sat, 15 Oct 2011 09:43:42 +0000
Subject: fix UI jump in normal buttons for buttons which didnt start out
 normalized.

---
 source/blender/editors/interface/interface.c          | 12 ++++++++----
 source/blender/editors/interface/interface_handlers.c |  9 ++++++---
 source/blender/editors/interface/interface_intern.h   |  4 ++--
 3 files changed, 16 insertions(+), 9 deletions(-)

(limited to 'source')

diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index a816c1612a1..a62658349c1 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -1211,7 +1211,7 @@ void ui_delete_linkline(uiLinkLine *line, uiBut *but)
  * an edit override pointer while dragging for example */
 
 /* for buttons pointing to color for example */
-void ui_get_but_vectorf(uiBut *but, float *vec)
+void ui_get_but_vectorf(uiBut *but, float vec[3])
 {
 	PropertyRNA *prop;
 	int a, tot;
@@ -1249,16 +1249,20 @@ void ui_get_but_vectorf(uiBut *but, float *vec)
 			vec[0]= vec[1]= vec[2]= 0.0f;
 		}
 	}
+
+	if (but->type == BUT_NORMAL) {
+		normalize_v3(vec);
+	}
 }
 
 /* for buttons pointing to color for example */
-void ui_set_but_vectorf(uiBut *but, float *vec)
+void ui_set_but_vectorf(uiBut *but, const float vec[3])
 {
 	PropertyRNA *prop;
 	int a, tot;
 
 	if(but->editvec) {
-		VECCOPY(but->editvec, vec);
+		copy_v3_v3(but->editvec, vec);
 	}
 
 	if(but->rnaprop) {
@@ -1280,7 +1284,7 @@ void ui_set_but_vectorf(uiBut *but, float *vec)
 	}
 	else if(but->pointype == FLO) {
 		float *fp= (float *)but->poin;
-		VECCOPY(fp, vec);
+		copy_v3_v3(fp, vec);
 	}
 }
 
diff --git a/source/blender/editors/interface/interface_handlers.c b/source/blender/editors/interface/interface_handlers.c
index 9af9b2f55ad..6699e8f8701 100644
--- a/source/blender/editors/interface/interface_handlers.c
+++ b/source/blender/editors/interface/interface_handlers.c
@@ -1966,8 +1966,6 @@ static void ui_do_but_textedit_select(bContext *C, uiBlock *block, uiBut *but, u
 
 static void ui_numedit_begin(uiBut *but, uiHandleButtonData *data)
 {
-	float softrange, softmin, softmax;
-
 	if(but->type == BUT_CURVE) {
 		but->editcumap= (CurveMapping*)but->poin;
 	}
@@ -1977,10 +1975,12 @@ static void ui_numedit_begin(uiBut *but, uiHandleButtonData *data)
 	}
 	else if(ELEM3(but->type, BUT_NORMAL, HSVCUBE, HSVCIRCLE)) {
 		ui_get_but_vectorf(but, data->origvec);
-		VECCOPY(data->vec, data->origvec);
+		copy_v3_v3(data->vec, data->origvec);
 		but->editvec= data->vec;
 	}
 	else {
+		float softrange, softmin, softmax;
+
 		data->startvalue= ui_get_but_val(but);
 		data->origvalue= data->startvalue;
 		data->value= data->origvalue;
@@ -3004,6 +3004,9 @@ static int ui_numedit_but_NORMAL(uiBut *but, uiHandleButtonData *data, int mx, i
 	/* button is presumed square */
 	/* if mouse moves outside of sphere, it does negative normal */
 
+	/* note that both data->vec and data->origvec should be normalized
+	 * else we'll get a hamrless but annoying jump when first clicking */
+
 	fp= data->origvec;
 	rad= (but->x2 - but->x1);
 	radsq= rad*rad;
diff --git a/source/blender/editors/interface/interface_intern.h b/source/blender/editors/interface/interface_intern.h
index 6fb7677da6e..12e9d39e896 100644
--- a/source/blender/editors/interface/interface_intern.h
+++ b/source/blender/editors/interface/interface_intern.h
@@ -350,8 +350,8 @@ extern void ui_window_to_region(const ARegion *ar, int *x, int *y);
 extern double ui_get_but_val(uiBut *but);
 extern void ui_set_but_val(uiBut *but, double value);
 extern void ui_set_but_hsv(uiBut *but);
-extern void ui_get_but_vectorf(uiBut *but, float *vec);
-extern void ui_set_but_vectorf(uiBut *but, float *vec);
+extern void ui_get_but_vectorf(uiBut *but, float vec[3]);
+extern void ui_set_but_vectorf(uiBut *but, const float vec[3]);
 
 extern void ui_hsvcircle_vals_from_pos(float *valrad, float *valdist, rcti *rect, float mx, float my);
 
-- 
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