This patches adds support for Font, Curve, Surface and Meta Objects in

Blender.NMesh.GetRawFromObject through a displist conversion method as used by
Blender when converting them in the UI.

Notes:	Objects with only edges (3D curves/polyline without bevel) do not have
		normals, so they are all initialised to (1, 0, 0) on conversion

		Converting from meta objects only work on the "mother ball". That is,
		the object with the lower base name.
		Example: "meta" for all the "meta.*" objects.

		Meshes extracted from curve based objects (Font/2D filled curves)
		contain	both the filled surfaces and the outlines of the shapes.

		Materials are taken from the object's material list. Material handling
		in NMesh is incorrect anyway, as it always uses the materials from the
		mesh, ignoring the setting in ob->colbits.

This patch also makes the include order a little clearer.
A couple of warnings have been fixed by using better types:
	-	Using char instead of short when parsing color values.
		The "constructor" expects and uses char anyway.

	-	Explicit casting to short when storing normals back in mvert.

	-	Changing constant doubles to floats with "f" to make compiler happy.

The only warning left regards NMFace.flag which is stored as a short but is
used to fill in TFace.flag which is a char. I didn't want to change the
object's structure so I left it like that. I didn't add an explicit cast when
putting it back in TFace so that the warning can remind us that there might be
something to change there.

2 files changed, 339 insertions, 39 deletions

diff --git a/source/blender/python/api2_2x/NMesh.c b/source/blender/python/api2_2x/NMesh.c
index 531a06fdc5d..44c0b501159 100644
--- a/source/blender/python/api2_2x/NMesh.c
+++ b/source/blender/python/api2_2x/NMesh.c
@@ -40,6 +40,7 @@
 #include "DNA_scene_types.h"
 #include "DNA_oops_types.h"
 #include "DNA_space_types.h"
+#include "DNA_curve_types.h"
 
 #include "BDR_editface.h"	/* make_tfaces */
 #include "BDR_vpaint.h"
@@ -58,10 +59,12 @@
 #include "BKE_displist.h"
 #include "BKE_DerivedMesh.h"
 #include "BKE_object.h"
-#include "BKE_depsgraph.h"
+#include "BKE_mball.h"
 #include "BKE_utildefines.h"
+#include "BKE_depsgraph.h"
 
 #include "BLI_arithb.h"
+
 #include "blendef.h"
 #include "mydevice.h"
 #include "Object.h"
@@ -315,6 +318,7 @@ void mesh_update( Mesh * mesh, Object * ob )
 	}
 }
 
+
 /*****************************/
 /*			Mesh Color Object		 */
 /*****************************/
@@ -338,10 +342,10 @@ static BPy_NMCol *newcol( char r, char g, char b, char a )
 
 static PyObject *M_NMesh_Col( PyObject * self, PyObject * args )
 {
-	short r = 255, g = 255, b = 255, a = 255;
+	char r = 255, g = 255, b = 255, a = 255;
 
-	if( PyArg_ParseTuple( args, "|hhhh", &r, &g, &b, &a ) )
-		return ( PyObject * ) newcol( (unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a );
+	if( PyArg_ParseTuple( args, "|bbbb", &r, &g, &b, &a ) )
+		return ( PyObject * ) newcol( r, g, b, a );
 
 	return NULL;
 }
@@ -367,12 +371,12 @@ static PyObject *NMCol_getattr( PyObject * self, char *name )
 static int NMCol_setattr( PyObject * self, char *name, PyObject * v )
 {
 	BPy_NMCol *mc = ( BPy_NMCol * ) self;
-	short ival;
+	char ival;
 
-	if( !PyArg_Parse( v, "h", &ival ) )
+	if( !PyArg_Parse( v, "b", &ival ) )
 		return -1;
 
-	ival = ( short ) EXPP_ClampInt( ival, 0, 255 );
+	ival = ( char ) EXPP_ClampInt( ival, 0, 255 );
 
 	if( strcmp( name, "r" ) == 0 )
 		mc->r = (unsigned char)ival;
@@ -595,6 +599,7 @@ static int NMFace_setattr( PyObject * self, char *name, PyObject * v )
 {
 	BPy_NMFace *mf = ( BPy_NMFace * ) self;
 	short ival;
+	char cval;
 
 	if( strcmp( name, "v" ) == 0 ) {
 
@@ -613,8 +618,8 @@ static int NMFace_setattr( PyObject * self, char *name, PyObject * v )
 			return 0;
 		}
 	} else if( !strcmp( name, "mat" ) || !strcmp( name, "materialIndex" ) ) {
-		PyArg_Parse( v, "h", &ival );
-		mf->mat_nr = (char)ival;
+		PyArg_Parse( v, "b", &cval );
+		mf->mat_nr = cval;
 
 		return 0;
 	} else if( strcmp( name, "smooth" ) == 0 ) {
@@ -655,8 +660,8 @@ static int NMFace_setattr( PyObject * self, char *name, PyObject * v )
 
 		return 0;
 	} else if( strcmp( name, "transp" ) == 0 ) {
-		PyArg_Parse( v, "h", &ival );
-		mf->transp = (unsigned char)ival;
+		PyArg_Parse( v, "b", &cval );
+		mf->transp = cval;
 
 		return 0;
 	} else if( strcmp( name, "image" ) == 0 ) {
@@ -1983,6 +1988,243 @@ static int get_active_faceindex( Mesh * me )
 	return -1;
 }
 
+static BPy_NMVert *nmvert_from_float(float *co, float *no, int idx) {
+	BPy_NMVert *mv;
+
+	mv = PyObject_NEW( BPy_NMVert, &NMVert_Type );
+
+	mv->index = idx;
+
+	mv->co[0] = co[0];
+	mv->co[1] = co[1];
+	mv->co[2] = co[2];
+
+	mv->no[0] = no[0];
+	mv->no[1] = no[1];
+	mv->no[2] = no[2];
+
+	mv->uvco[0] = mv->uvco[1] = mv->uvco[2] = 0.0;
+
+	mv->flag = 0;
+
+	return mv;
+}
+
+static BPy_NMFace *nmface_from_index( BPy_NMesh * mesh, int vidxs[4], char mat_nr )
+{
+	BPy_NMFace *newf = PyObject_NEW( BPy_NMFace, &NMFace_Type );
+	int i, len;
+
+	if( vidxs[3] )
+		len = 4;
+	else if( vidxs[2] )
+		len = 3;
+	else
+		len = 2;
+
+	newf->v = PyList_New( len );
+
+	for( i = 0; i < len; i++ )
+		PyList_SetItem( newf->v, i,
+				EXPP_incr_ret( PyList_GetItem
+					       ( mesh->verts, vidxs[i] ) ) );
+
+	newf->mode = TF_DYNAMIC;	/* just to initialize it to something meaninful, */
+	/* since without tfaces there are no tface->mode's, obviously. */
+	newf->image = NULL;
+	newf->uv = PyList_New( 0 );
+
+	newf->mat_nr = mat_nr;
+	newf->mf_flag = 0;
+
+	newf->col = PyList_New( 0 );
+
+	return newf;
+}
+
+/* RATHER EVIL FUNCTION BORROWED FROM fix_faceindices IN editmesh.c */
+static void correctFaceIndex(int vidx[4])
+{
+	if (vidx[3]) {
+		if (vidx[1] == 0) {
+			vidx[1] = vidx[2];
+			vidx[2] = vidx[3];
+			vidx[3] = vidx[0];
+			vidx[0] = 0;
+		}
+		if (vidx[2] == 0) {
+			int t = vidx[1];
+			vidx[2] = vidx[0];
+			vidx[1] = vidx[3];
+			vidx[3] = t;
+			vidx[0] = 0;
+		}
+		if (vidx[3] == 0) {
+			vidx[3] = vidx[2];
+			vidx[2] = vidx[1];
+			vidx[1] = vidx[0];
+			vidx[0] = 0;
+		}
+	}
+	else if (vidx[1] == 0) {
+		vidx[1] = vidx[2];
+		vidx[2] = vidx[0];
+		vidx[0] = 0;
+	}
+	else if (vidx[2] == 0) {
+		vidx[2] = vidx[1];
+		vidx[1] = vidx[0];
+		vidx[0] = 0;
+	}
+}
+
+/*
+	CREATES A NMESH FROM DISPLIST DATA. INSPIRED BY THE FUNCTIONS CALLED WHEN
+	CONVERTING OBJECTS TO MESH.
+ */
+static PyObject *new_NMesh_displist(ListBase *lb, Object *ob)
+{
+	BPy_NMesh *me;
+	DispList *dl;
+	float *data, *ndata;
+	float normal[3] = {1, 0, 0};
+	int vidx[4];
+	int parts, p1, p2, p3, p4, a, b, one_normal=0, ioffset=0;
+	int *index;
+
+	if (ob->type == OB_CURVE || ob->type == OB_FONT)
+		one_normal = 1;
+
+	me = PyObject_NEW( BPy_NMesh, &NMesh_Type );
+	me->name = EXPP_incr_ret( Py_None );
+	me->flags = 0;
+	me->mode = ME_TWOSIDED;	/* default for new meshes */
+	me->subdiv[0] = NMESH_SUBDIV;
+	me->subdiv[1] = NMESH_SUBDIV;
+	me->smoothresh = NMESH_SMOOTHRESH;
+	me->edges = NULL;
+
+	me->object = ob;
+	me->materials = EXPP_PyList_fromMaterialList( ob->mat, ob->totcol, 0 );
+
+	me->verts = PyList_New( 0 ); 
+	me->faces = PyList_New( 0 );
+
+	dl= lb->first;
+	while(dl) {
+		parts= dl->parts;
+		index= dl->index;
+		data= dl->verts;
+		ndata= dl->nors;
+
+		switch(dl->type) {
+		case DL_SEGM:
+			for(a=0; a<dl->parts*dl->nr; a++, data+=3) {
+				PyList_Append(me->verts, ( PyObject * ) nmvert_from_float(data, normal, a));
+			}
+
+			vidx[2] = vidx[3] = 0;
+
+			for(a=0; a<dl->parts; a++) {
+				for(b=1; b<dl->nr; b++) {
+					vidx[0] = ioffset + a * dl->nr + b-1;
+					vidx[1] = ioffset + a * dl->nr + b;
+					PyList_Append(me->faces, ( PyObject * ) nmface_from_index(me, vidx, 0));
+				}
+			}
+			ioffset += dl->parts * dl->nr;
+			break;
+		case DL_POLY:
+			for(a=0; a<dl->parts*dl->nr; a++, data+=3) {
+				PyList_Append(me->verts, ( PyObject * ) nmvert_from_float(data, normal, a));
+			}
+
+			vidx[2] = vidx[3] = 0;
+
+			for(a=0; a<dl->parts; a++) {
+				for(b=0; b<dl->nr; b++) {
+					vidx[0] = ioffset + a * dl->nr + b;
+					if(b==dl->nr-1) vidx[1] = ioffset + a * dl->nr;
+					else vidx[1]= ioffset + a * dl->nr + b+1;
+					PyList_Append(me->faces, ( PyObject * ) nmface_from_index(me, vidx, 0));
+				}
+			}
+			ioffset += dl->parts * dl->nr;
+			break;
+		case DL_SURF:
+			for(a=0; a<dl->parts*dl->nr; a++, data+=3, ndata+=3) {
+				PyList_Append(me->verts, ( PyObject * ) nmvert_from_float(data, ndata, a));
+			}
+
+			for(a=0; a<dl->parts; a++) {
+				
+				DL_SURFINDEX(dl->flag & DL_CYCL_U, dl->flag & DL_CYCL_V, dl->nr, dl->parts);
+				
+				
+				for(; b<dl->nr; b++) {
+					vidx[0] = p2 + ioffset;
+					vidx[1] = p1 + ioffset;
+					vidx[2] = p3 + ioffset;
+					vidx[3] = p4 + ioffset;
+					correctFaceIndex(vidx);
+
+					PyList_Append(me->faces, ( PyObject * ) nmface_from_index(me, vidx, (char)dl->col));
+
+					p2 = p1;
+					p4 = p3;
+					p1++;
+					p3++;
+				}
+			}
+			ioffset += dl->parts * dl->nr;
+			break;
+
+		case DL_INDEX3:
+			if (one_normal)
+				for(a=0; a<dl->nr; a++, data+=3)
+					PyList_Append(me->verts, ( PyObject * ) nmvert_from_float(data, ndata, a));
+			else
+				for(a=0; a<dl->nr; a++, data+=3, ndata+=3)
+					PyList_Append(me->verts, ( PyObject * ) nmvert_from_float(data, ndata, a));
+
+			while(parts--) {
+				vidx[0] = index[0] + ioffset;
+				vidx[1] = index[1] + ioffset;
+				vidx[2] = index[2] + ioffset;
+				vidx[3] = 0;
+				correctFaceIndex(vidx);
+
+				PyList_Append(me->faces, ( PyObject * ) nmface_from_index(me, vidx, (char)dl->col));
+				index+= 3;
+			}
+			ioffset += dl->nr;
+
+			break;
+
+		case DL_INDEX4:
+			for(a=0; a<dl->nr; a++, data+=3, ndata+=3) {
+				PyList_Append(me->verts, ( PyObject * ) nmvert_from_float(data, ndata, a));
+			}
+
+			while(parts--) {
+				vidx[0] = index[0] + ioffset;
+				vidx[1] = index[1] + ioffset;
+				vidx[2] = index[2] + ioffset;
+				vidx[3] = index[3] + ioffset;
+				correctFaceIndex(vidx);
+
+				PyList_Append(me->faces, ( PyObject * ) nmface_from_index(me, vidx, (char)dl->col));
+				index+= 4;
+			}
+			ioffset += dl->nr;
+			break;
+		}
+		dl= dl->next;
+	}
+
+	return ( PyObject * ) me;
+}
+
 static PyObject *new_NMesh_internal( Mesh * oldmesh,
 				     DispListMesh * dlm )
 {
@@ -2087,19 +2329,17 @@ static PyObject *new_NMesh_internal( Mesh * oldmesh,
 									 oldmc ) );
 		}
 
-    if (medges)
-    {
-      me->edges = PyList_New( totedge );
-      for( i = 0; i < totedge; i++ )
-      {
-        MEdge *edge = &medges[i];
-        PyList_SetItem( me->edges, i, (PyObject*)nmedge_from_data ( me, edge ) );
-      }
-    }
+		if (medges)
+		{
+			me->edges = PyList_New( totedge );
+			for( i = 0; i < totedge; i++ )
+			{
+				MEdge *edge = &medges[i];
+				PyList_SetItem( me->edges, i, (PyObject*)nmedge_from_data ( me, edge ) );
+			}
+		}
 
-		me->materials =
-			EXPP_PyList_fromMaterialList( oldmesh->mat,
-						      oldmesh->totcol, 0 );
+		me->materials = EXPP_PyList_fromMaterialList( oldmesh->mat, oldmesh->totcol, 0 );
 	}
 
 	return ( PyObject * ) me;
@@ -2166,9 +2406,11 @@ static PyObject *M_NMesh_GetNames(PyObject *self)
  * the vertices are already transformed / deformed. */
 static PyObject *M_NMesh_GetRawFromObject( PyObject * self, PyObject * args )
 {
-	char *name;
 	Object *ob;
 	PyObject *nmesh;
+	ListBase *lb=0;
+	DispList *dl;
+	char *name;
 
 	if( !PyArg_ParseTuple( args, "s", &name ) )
 		return EXPP_ReturnPyObjError( PyExc_TypeError,
@@ -2178,18 +2420,70 @@ static PyObject *M_NMesh_GetRawFromObject( PyObject * self, PyObject * args )
 
 	if( !ob )
 		return EXPP_ReturnPyObjError( PyExc_AttributeError, name );
-	else if( ob->type != OB_MESH )
-		return EXPP_ReturnPyObjError( PyExc_AttributeError,
-					      "Object does not have Mesh data" );
-	else {
-		int needsFree;
-		DerivedMesh *dm = mesh_get_derived_final(ob, &needsFree);
-		DispListMesh *dlm = dm->convertToDispListMesh(dm);
-		nmesh = new_NMesh_internal(ob->data, dlm );
-		if (needsFree)
-			dm->release(dm);
-		displistmesh_free(dlm);
-	}
+
+ 
+ 	switch (ob->type) {
+ 	case OB_MBALL:
+ 		if( is_basis_mball(ob)) {
+ 			lb= &ob->disp;
+ 			if(lb->first==0) makeDispListMBall(ob);
+ 			nmesh = new_NMesh_displist(lb, ob);
+ 		}
+ 		else {
+ 			return EXPP_ReturnPyObjError( PyExc_AttributeError, "Object does not have geometry data" );
+ 		}
+ 		break;
+ 	case OB_FONT:
+ 	case OB_CURVE:
+ 		{
+ 			Curve *cu= ob->data;
+ 			
+ 			lb= &cu->disp;
+ 			if(lb->first==0) makeDispListCurveTypes(ob);
+ 
+ 			dl= lb->first;
+ 			if(dl==0)
+ 				return EXPP_ReturnPyObjError( PyExc_AttributeError, "Object does not have geometry data" );
+ 			
+ 			/* rule: dl->type INDEX3 is always first in list */
+ 			if(dl->type!=DL_INDEX3) {
+ 				curve_to_filledpoly(ob->data, &cu->nurb, lb);
+ 				
+ 				dl= lb->first;
+ 			}
+ 
+ 			if(dl->nors==0) addnormalsDispList(ob, lb);
+ 
+ 			nmesh = new_NMesh_displist(lb, ob);
+ 		}
+ 		break;
+ 	case OB_SURF:
+ 	
+ 		lb= &((Curve *)ob->data)->disp;
+ 		if(lb->first==0) makeDispListCurveTypes(ob);
+ 		
+ 		dl= lb->first;
+ 		if(dl==0)
+ 			return EXPP_ReturnPyObjError( PyExc_AttributeError, "Object does not have geometry data" );
+ 		
+ 		if(dl->nors==0) addnormalsDispList(ob, lb);
+ 		nmesh = new_NMesh_displist(lb, ob);
+ 
+ 		break;
+ 	case OB_MESH:
+ 		{
+			int needsFree;
+			DerivedMesh *dm = mesh_get_derived_final(ob, &needsFree);
+			DispListMesh *dlm = dm->convertToDispListMesh(dm);
+			nmesh = new_NMesh_internal(ob->data, dlm );
+			if (needsFree)
+				dm->release(dm);
+			displistmesh_free(dlm);
+ 		}
+ 		break;
+ 	default:
+ 		return EXPP_ReturnPyObjError( PyExc_AttributeError, "Object does not have geometry data" );
+  	}
 
 /* @hack: to mark that (deformed) mesh is readonly, so the update function
  * will not try to write it. */
@@ -2851,6 +3145,8 @@ static PyObject *M_NMesh_PutRaw( PyObject * self, PyObject * args )
 			mesh = ( Mesh * ) ob->data;
 		else
 			set_mesh( ob, mesh );	// also does id.us++
+
+		nmesh->object = ob;	// linking so vgrouping methods know which obj to work on
 	}
 
 	if( name )
@@ -2902,7 +3198,6 @@ static PyObject *M_NMesh_PutRaw( PyObject * self, PyObject * args )
 	// each bit indicates the binding PER MATERIAL 
 
 	if( ob ) {		// we created a new object
-		nmesh->object = ob;	// linking so vgrouping methods know which obj to work on
 		NMesh_assignMaterials_toObject( nmesh, ob );
 		EXPP_synchronizeMaterialLists( ob );
 		return Object_CreatePyObject( ob );
@@ -3930,7 +4225,6 @@ static PyObject *NMesh_transform (PyObject *self, PyObject *args)
 		vz = mv->co[2];
 
 		/* Mat4MulVecfl(mat->matrix, mv->co); */
-
 		mv->co[0] = vx*mat->matrix[0][0] + vy*mat->matrix[1][0] +
 								vz*mat->matrix[2][0] + mat->matrix[3][0];
 		mv->co[1] = vx*mat->matrix[0][1] + vy*mat->matrix[1][1] +
diff --git a/source/blender/python/api2_2x/doc/NMesh.py b/source/blender/python/api2_2x/doc/NMesh.py
index c2f7df2a311..2fa2de747af 100644
--- a/source/blender/python/api2_2x/doc/NMesh.py
+++ b/source/blender/python/api2_2x/doc/NMesh.py
@@ -9,6 +9,7 @@ L{NMesh.addEdgesData}, etc.);
  - new optional arguments to L{NMesh.update};
  - L{NMesh.transform};
  - L{GetNames}.
+ - L{GetRawFromObject} supports Surface/Curve/Text/Meta objects
 
 Mesh Data
 =========
@@ -151,8 +152,9 @@ def GetRawFromObject(name):
   Get the raw mesh data object from the Object in Blender called I{name}.\n
   Note: The mesh coordinates are in local space, not the world space of its Object.\n
   For world space vertex coordinates, each vertex location must be multiplied by the object's 4x4 matrix.
+  This function support all the geometry based objects: Mesh, Text, Surface, Curve, Meta.
   @type name: string
-  @param name: The name of an Object of type "Mesh".
+  @param name: The name of an Object.
   @rtype: NMesh
   @return: The NMesh wrapper of the mesh data from the Object called I{name}.
   @note: For "subsurfed" meshes, it's the B{display} level of subdivision that
@@ -160,10 +162,14 @@ def GetRawFromObject(name):
       and is not available for scripts.  This is not a problem at all, since
       you can get and set the subdivision levels via scripting, too (see
       L{NMesh.getSubDivLevels}, L{NMesh.setSubDivLevels}).
+  @note: Meshes extracted from curve based objects (Font/2D filled curves)
+      contain both the filled surfaces and the outlines of the shapes.
   @warn: This function gets I{deformed} mesh data, already modified for
       displaying (think "display list").  It also doesn't let you overwrite the
       original mesh in Blender, so if you try to update it, a new mesh will
       be created.
+  @warn: For Meta Object's, this function will only return a NMesh with some geometry
+      when called on the base element (the one with the shortest name).
   """
 
 def PutRaw(nmesh, name = None, recalc_normals = 1, store_edges = 0):