Add "View Selected" (numpad .-key) for faceselect mode and the uv editor.

Also includes some 2d vector operations (subtract, dot, normalise).

source/blender/blenlib/BLI_arithb.h

@@ -811,6 +811,26 @@ Vec2Addf(
 	float *v1, 
 	float *v2
 );
+	void 
+Vec2Subf(
+	float *v,
+	float *v1, 
+	float *v2
+);
+	void
+Vec2Copyf(
+	float *v1,
+	float *v2
+);
+	float 
+Inp2f(
+	float *v1, 
+	float *v2
+);
+	float 
+Normalise2(
+	float *n
+);
 
 void tubemap(float x, float y, float z, float *u, float *v);
 void spheremap(float x, float y, float z, float *u, float *v);

source/blender/blenlib/intern/arithb.c

@@ -2365,6 +2365,41 @@ void Vec2Addf(float *v, float *v1, float *v2)
 	v[1]= v1[1]+ v2[1];
 }
 
+void Vec2Subf(float *v, float *v1, float *v2)
+{
+	v[0]= v1[0]- v2[0];
+	v[1]= v1[1]- v2[1];
+}
+
+void Vec2Copyf(float *v1, float *v2)
+{
+	v1[0]= v2[0];
+	v1[1]= v2[1];
+}
+
+float Inp2f(float *v1, float *v2)
+{
+	return v1[0]*v2[0]+v1[1]*v2[1];
+}
+
+float Normalise2(float *n)
+{
+	float d;
+	
+	d= n[0]*n[0]+n[1]*n[1];
+
+	if(d>1.0e-35F) {
+		d= (float)sqrt(d);
+
+		n[0]/=d; 
+		n[1]/=d; 
+	} else {
+		n[0]=n[1]= 0.0;
+		d= 0.0;
+	}
+	return d;
+}
+
 void hsv_to_rgb(float h, float s, float v, float *r, float *g, float *b)
 {
 	int i;

source/blender/include/BDR_editface.h

@@ -47,6 +47,7 @@ void select_linked_tfaces(void);
 void deselectall_tface(void);
 void selectswap_tface(void);
 void rotate_uv_tface(void);
+void minmax_tface(float *min, float *max);
 int face_pick(struct Mesh *me, short x, short y);
 void face_select(void);
 void face_borderselect(void);

source/blender/include/BIF_drawimage.h

@@ -44,6 +44,7 @@ void image_changed(struct SpaceImage *sima, int dotile);
 void image_home(void);
 void image_viewmove(void);
 void image_viewzoom(unsigned short event);
+void image_viewcentre(void);
 void uvco_to_areaco(float *vec, short *mval);
 void uvco_to_areaco_noclip(float *vec, short *mval);
 void what_image(struct SpaceImage *sima);

source/blender/include/BIF_editsima.h

@@ -46,4 +46,5 @@ void unlink_selection(void);
 void select_linked_tface_uv(void);
 void toggle_uv_select(int mode);
 void pin_tface_uv(int mode);
+int minmax_tface_uv(float *min, float *max);
 

source/blender/src/drawimage.c

@@ -1020,3 +1020,32 @@ void image_home(void)
 	scrarea_queue_winredraw(curarea);
 }
 
+void image_viewcentre(void)
+{
+	float size, min[2], max[2], d[2], xim=256.0f, yim=256.0f;
+
+	if( is_uv_tface_editing_allowed()==0 ) return;
+
+	if (!minmax_tface_uv(min, max)) return;
+
+	if(G.sima->image && G.sima->image->ibuf) {
+		xim= G.sima->image->ibuf->x;
+		yim= G.sima->image->ibuf->y;
+	}
+
+	G.sima->xof= ((min[0] + max[0])*0.5f - 0.5f)*xim;
+	G.sima->yof= ((min[1] + max[1])*0.5f - 0.5f)*yim;
+
+	d[0] = max[0] - min[0];
+	d[1] = max[1] - min[1];
+	size= 0.5*MAX2(d[0], d[1])*MAX2(xim, yim)/256.0f;
+	
+	if(size<=0.01) size= 0.01;
+
+	G.sima->zoom= 1.0/size;
+
+	calc_image_view(G.sima, 'p');
+
+	scrarea_queue_winredraw(curarea);
+}
+

source/blender/src/editface.c

@@ -844,6 +844,54 @@ void rotate_uv_tface()
 	allqueue(REDRAWIMAGE, 0);
 }
 
+void minmax_tface(float *min, float *max)
+{
+	Object *ob;
+	Mesh *me;
+	MFace *mf;
+	TFace *tf;
+	MVert *mv;
+	int a;
+	float vec[3], bmat[3][3];
+	
+	ob = OBACT;
+	if (ob==0) return;
+	me= get_mesh(ob);
+	if(me==0 || me->tface==0) return;
+	
+	Mat3CpyMat4(bmat, ob->obmat);
+
+	mv= me->mvert;
+	mf= me->mface;
+	tf= me->tface;
+	for (a=me->totface; a>0; a--, mf++, tf++) {
+		if (!mf->v3 || tf->flag & TF_HIDE || !(tf->flag & TF_SELECT))
+			continue;
+
+		VECCOPY(vec, (mv+mf->v1)->co);
+		Mat3MulVecfl(bmat, vec);
+		VecAddf(vec, vec, ob->obmat[3]);
+		DO_MINMAX(vec, min, max);		
+
+		VECCOPY(vec, (mv+mf->v2)->co);
+		Mat3MulVecfl(bmat, vec);
+		VecAddf(vec, vec, ob->obmat[3]);
+		DO_MINMAX(vec, min, max);		
+
+		VECCOPY(vec, (mv+mf->v3)->co);
+		Mat3MulVecfl(bmat, vec);
+		VecAddf(vec, vec, ob->obmat[3]);
+		DO_MINMAX(vec, min, max);		
+
+		if (mf->v4) {
+			VECCOPY(vec, (mv+mf->v4)->co);
+			Mat3MulVecfl(bmat, vec);
+			VecAddf(vec, vec, ob->obmat[3]);
+			DO_MINMAX(vec, min, max);
+		}
+	}
+}
+
 /**
  * Returns the face under the give position in screen coordinates.
  * Code extracted from face_select routine.

source/blender/src/editsima.c

@@ -1739,3 +1739,42 @@ void pin_tface_uv(int mode)
 	scrarea_queue_winredraw(curarea);
 }
 
+int minmax_tface_uv(float *min, float *max)
+{
+	Mesh *me;
+	TFace *tf;
+	MFace *mf;
+	int a, sel;
+
+	if( is_uv_tface_editing_allowed()==0 ) return 0;
+	me= get_mesh(OBACT);
+
+	INIT_MINMAX2(min, max);
+
+	sel= 0;
+	mf= (MFace*)me->mface;
+	tf= (TFace*)me->tface;
+	for(a=me->totface; a>0; a--, tf++, mf++) {
+		if(tf->flag & TF_HIDE);
+		else if(mf->v3 && (tf->flag & TF_SELECT)) {
+
+			if (tf->flag & TF_SEL1) {
+				DO_MINMAX2(tf->uv[0], min, max);
+			}
+			if (tf->flag & TF_SEL2) {
+				DO_MINMAX2(tf->uv[1], min, max);
+			}
+			if (tf->flag & TF_SEL3) {
+				DO_MINMAX2(tf->uv[2], min, max);
+			}
+			if (mf->v4 && tf->flag & TF_SEL4) {
+				DO_MINMAX2(tf->uv[3], min, max);
+			}
+
+			sel = 1;
+		}
+	}
+
+	return sel;
+}
+

source/blender/src/header_image.c

@@ -411,6 +411,8 @@ static void do_image_viewmenu(void *arg, int event)
 	case 8: /* Paint Panel... */
 		add_blockhandler(curarea, IMAGE_HANDLER_PAINT, UI_PNL_UNSTOW);
 		break;
+	case 9:
+		image_viewcentre();
 	}
 	allqueue(REDRAWVIEW3D, 0);
 }
@@ -444,6 +446,7 @@ static uiBlock *image_viewmenu(void *arg_unused)
 
 	uiDefBut(block, SEPR, 0, "",					0, yco-=6, menuwidth, 6, NULL, 0.0, 0.0, 0, 0, "");
 	
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "View Selected|NumPad .",			0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 0, 9, "");
 	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "View All|Home", 0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 1, "");
 		
 	if(!curarea->full) uiDefIconTextBut(block, BUTM, B_FULL, ICON_BLANK1, "Maximize Window|Ctrl UpArrow", 0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 0, 2, "");

source/blender/src/space.c

@@ -3835,6 +3835,10 @@ static void winqreadimagespace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 			case WKEY:
 				transform_tface_uv('w');
 				break;
+			case PADPERIOD:
+				if(G.qual==0)
+					image_viewcentre();
+				break;
 		}
 	}	
 

source/blender/src/view.c

@@ -75,6 +75,7 @@
 #include "BSE_drawview.h"	/* For inner_play_anim_loop */
 
 #include "BDR_drawobject.h"	/* For draw_object */
+#include "BDR_editface.h"	/* For minmax_tface */
 
 #include "mydevice.h"
 #include "blendef.h"
@@ -1006,6 +1007,10 @@ void centreview()	/* like a localview without local! */
 		
 		ok= 1;
 	}
+	else if (G.f & G_FACESELECT) {
+		minmax_tface(min, max);
+		ok= 1;
+	}
 	else {
 		base= FIRSTBASE;
 		while(base) {