Revision: 36295
          
http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=36295
Author:   nazgul
Date:     2011-04-23 09:07:46 +0000 (Sat, 23 Apr 2011)
Log Message:
-----------
Sculpting on shapekeys
======================

All this work with sculpting on armatured/deformed mesh allowed to
implement sculpting on non-locked keys very easy -- just use the same
approach of propagating offsets from deformed PBVH to "sculpting layer".

- If key is locked, then old logic would be used.
- If there's multires modifier enabled, sculpting would happen on multires.

Modified Paths:
--------------
    trunk/blender/source/blender/blenkernel/intern/cdderivedmesh.c
    trunk/blender/source/blender/editors/sculpt_paint/sculpt.c

Modified: trunk/blender/source/blender/blenkernel/intern/cdderivedmesh.c
===================================================================
--- trunk/blender/source/blender/blenkernel/intern/cdderivedmesh.c      
2011-04-23 08:52:27 UTC (rev 36294)
+++ trunk/blender/source/blender/blenkernel/intern/cdderivedmesh.c      
2011-04-23 09:07:46 UTC (rev 36295)
@@ -197,9 +197,21 @@
 {
        CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
        Mesh *me= ob->data;
+       int deformed= 0;
 
-       if(ob->sculpt->modifiers_active) return 0;
+       /* active modifiers means extra deformation, which can't be handled 
correct
+          on bith of PBVH and sculpt "layer" levels, so use PBVH only for 
internal brush
+          stuff and show final DerivedMesh so user would see actual object 
shape */
+       deformed|= ob->sculpt->modifiers_active;
 
+       /* as in case with modifiers, we can't synchronize deformation made 
against
+          PBVH and non-locked keyblock, so also use PBVH only for brushes and
+          final DM to give final result to user */
+       deformed|= ob->sculpt->kb && (ob->shapeflag&OB_SHAPE_LOCK) == 0;
+
+       if(deformed)
+               return 0;
+
        return (cddm->mvert == me->mvert) || ob->sculpt->kb;
 }
 

Modified: trunk/blender/source/blender/editors/sculpt_paint/sculpt.c
===================================================================
--- trunk/blender/source/blender/editors/sculpt_paint/sculpt.c  2011-04-23 
08:52:27 UTC (rev 36294)
+++ trunk/blender/source/blender/editors/sculpt_paint/sculpt.c  2011-04-23 
09:07:46 UTC (rev 36295)
@@ -175,10 +175,15 @@
 int sculpt_modifiers_active(Scene *scene, Object *ob)
 {
        ModifierData *md;
+       Mesh *me= (Mesh*)ob->data;
        MultiresModifierData *mmd= sculpt_multires_active(scene, ob);
 
        if(mmd) return 0;
 
+       /* non-locked shaoe keys could be handled in the same way as deformed 
mesh */
+       if((ob->shapeflag&OB_SHAPE_LOCK)==0 && me->key && ob->shapenr)
+               return 1;
+
        md= modifiers_getVirtualModifierList(ob);
 
        /* exception for shape keys because we can edit those */
@@ -2708,7 +2713,7 @@
 
        ss->modifiers_active= sculpt_modifiers_active(scene, ob);
 
-       if((ob->shapeflag & OB_SHAPE_LOCK) && !mmd) ss->kb= ob_get_keyblock(ob);
+       if(!mmd) ss->kb= ob_get_keyblock(ob);
        else ss->kb= NULL;
 
        if(mmd) {
@@ -3342,7 +3347,7 @@
        sculpt_update_tex(sd, ss);
 }
 
-static int sculpt_brush_stroke_init(bContext *C, ReportList *reports)
+static int sculpt_brush_stroke_init(bContext *C, ReportList *UNUSED(reports))
 {
        Scene *scene= CTX_data_scene(C);
        Object *ob= CTX_data_active_object(C);
@@ -3350,11 +3355,6 @@
        SculptSession *ss = CTX_data_active_object(C)->sculpt;
        Brush *brush = paint_brush(&sd->paint);
 
-       if(ob_get_key(ob) && !(ob->shapeflag & OB_SHAPE_LOCK)) {
-               BKE_report(reports, RPT_ERROR, "Shape key sculpting requires a 
locked shape.");
-               return 0;
-       }
-
        view3d_operator_needs_opengl(C);
        sculpt_brush_init_tex(sd, ss);
 

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