RNA:

Implemented RNA wrapper for ModifierData.

Note that actual interface to access data of any specific modifier is
still missing. I also marked a couple of parts as TODO that should be
reviewed to decide whether or not to expose those specific parts
via RNA.

source/blender/makesrna/RNA_access.h

@@ -88,6 +88,7 @@ extern StructRNA RNA_Mesh;
 extern StructRNA RNA_MessageSensor;
 extern StructRNA RNA_MetaBall;
 extern StructRNA RNA_MetaElem;
+extern StructRNA RNA_ModifierData;
 extern StructRNA RNA_MouseSensor;
 extern StructRNA RNA_NearSensor;
 extern StructRNA RNA_Node;

source/blender/makesrna/intern/makesrna.c

@@ -893,6 +893,7 @@ RNAProcessItem PROCESS_ITEMS[]= {
 	{"rna_mesh.c", RNA_def_mesh},
 	{"rna_meta.c", RNA_def_metaball},
 	{"rna_meta.c", RNA_def_metaelem},
+	{"rna_modifier.c", RNA_def_modifier},
 	{"rna_nodetree.c", RNA_def_nodetree},
 	{"rna_object.c", RNA_def_object},
 	{"rna_radio.c", RNA_def_radio},

source/blender/makesrna/intern/rna_internal.h

@@ -98,6 +98,7 @@ void RNA_def_material(struct BlenderRNA *brna);
 void RNA_def_mesh(struct BlenderRNA *brna);
 void RNA_def_metaball(struct BlenderRNA *brna);
 void RNA_def_metaelem(struct BlenderRNA *brna);
+void RNA_def_modifier(struct BlenderRNA *brna);
 void RNA_def_nodetree(struct BlenderRNA *brna);
 void RNA_def_object(struct BlenderRNA *brna);
 void RNA_def_radio(struct BlenderRNA *brna);

source/blender/makesrna/intern/rna_modifier.c

@@ -0,0 +1,116 @@
+/**
+ * $Id$
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * Contributor(s): Blender Foundation (2008), Juho Veps<70>l<EFBFBD>inen
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include <stdlib.h>
+
+#include "RNA_define.h"
+#include "RNA_types.h"
+
+#include "rna_internal.h"
+
+#include "DNA_modifier_types.h"
+
+#ifdef RNA_RUNTIME
+
+#else
+
+void RNA_def_modifier(BlenderRNA *brna)
+{
+	StructRNA *srna;
+	PropertyRNA *prop;
+	
+	static EnumPropertyItem type_items[] ={
+		{eModifierType_Subsurf, "SUBSURF", "Subsurf", ""},
+		{eModifierType_Lattice, "LATTICE", "Lattice", ""},
+		{eModifierType_Curve, "CURVE", "Curve", ""},
+		{eModifierType_Build, "BUILD", "Build", ""},
+		{eModifierType_Mirror, "MIRROR", "Mirror", ""},
+		{eModifierType_Decimate, "DECIMATE", "Decimate", ""},
+		{eModifierType_Wave, "WAVE", "Wave", ""},
+		{eModifierType_Armature, "ARMATURE", "Armature", ""},
+		{eModifierType_Hook, "HOOK", "Hook", ""},
+		{eModifierType_Softbody, "SOFTBODY", "Softbody", ""},
+		{eModifierType_Boolean, "BOOLEAN", "Boolean", ""},
+		{eModifierType_Array, "ARRAY", "Array", ""},
+		{eModifierType_EdgeSplit, "EDGESPLIT", "EdgeSplit", ""},
+		{eModifierType_Displace, "DISPLACE", "Displace", ""},
+		{eModifierType_UVProject, "UVPROJECT", "UVProject", ""},
+		{eModifierType_Smooth, "SMOOTH", "Smooth", ""},
+		{eModifierType_Cast, "CAST", "Cast", ""},
+		{eModifierType_MeshDeform, "MESHDEFORM", "MeshDeform", ""},
+		{eModifierType_ParticleSystem, "PARTICLESYSTEM", "Particle System", ""},
+		{eModifierType_ParticleInstance, "PARTICLEINSTANCE", "Particle Instance", ""},
+		{eModifierType_Explode, "EXPLODE", "Explode", ""},
+		{eModifierType_Cloth, "CLOTH", "Cloth", ""},
+		{eModifierType_Collision, "COLLISION", "Collision", ""},
+		{eModifierType_Bevel, "BEVEL", "Bevel", ""},
+		{eModifierType_Shrinkwrap, "SHRINKWRAP", "Shrinkwrap", ""},
+		{eModifierType_Fluidsim, "FLUIDSIM", "Fluidsim", ""},
+		{eModifierType_Mask, "MASK", "Mask", ""},
+		{eModifierType_SimpleDeform, "SIMPLEDEFORM", "SimpleDeform", ""},
+		{0, NULL, NULL, NULL}};
+	
+	/* data */
+	srna= RNA_def_struct(brna, "ModifierData", NULL , "ModifierData");
+	RNA_def_struct_sdna(srna, "ModifierData");
+	
+	/* strings */
+	prop= RNA_def_property(srna, "name", PROP_STRING, PROP_NONE);
+	RNA_def_property_string_maxlength(prop, 31);
+	RNA_def_property_ui_text(prop, "Name", "Name of the modifier.");
+	
+	/* enums */
+	prop= RNA_def_property(srna, "type", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "type", PROP_DEF_ENUM_BITFLAGS);
+	RNA_def_property_enum_items(prop, type_items);
+	RNA_def_property_ui_text(prop, "Type", "Specify the type of the modifier.");
+	
+	/* flags */
+	prop= RNA_def_property(srna, "realtime", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "mode", eModifierMode_Realtime);
+	RNA_def_property_ui_text(prop, "Realtime", "Realtime display of a modifier.");
+	
+	prop= RNA_def_property(srna, "render", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "mode", eModifierMode_Render);
+	RNA_def_property_ui_text(prop, "Render", "Use modifier during rendering.");
+	
+	prop= RNA_def_property(srna, "editmode", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "mode", eModifierMode_Editmode);
+	RNA_def_property_ui_text(prop, "Editmode", "Use modifier while in the edit mode.");
+	
+	prop= RNA_def_property(srna, "oncage", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "mode", eModifierMode_OnCage);
+	RNA_def_property_ui_text(prop, "On Cage", "Enable direct editing of modifier control cage.");
+	
+	prop= RNA_def_property(srna, "expanded", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "mode", eModifierMode_Expanded);
+	RNA_def_property_ui_text(prop, "Expanded", "Set modifier expanded in the user interface.");
+	
+	/* TODO: expose "virtual" and "disable temporary" enum items? */
+
+	/* pointers */
+	/* TODO: expose error? */
+}
+
+#endif

source/blender/makesrna/intern/rna_object.c

@@ -58,6 +58,10 @@ void RNA_def_object(BlenderRNA *brna)
 	prop= RNA_def_property(srna, "loc", PROP_FLOAT, PROP_VECTOR);
 	RNA_def_property_ui_text(prop, "Location", "");
 
+	prop= RNA_def_property(srna, "modifiers", PROP_COLLECTION, PROP_NONE);
+	RNA_def_property_struct_type(prop, "ModifierData");
+	RNA_def_property_ui_text(prop, "Modifiers", "Modifiers of this object.");
+
 	prop= RNA_def_property(srna, "sensors", PROP_COLLECTION, PROP_NONE);
 	RNA_def_property_struct_type(prop, "Sensor");
 	RNA_def_property_ui_text(prop, "Sensors", "Sensors of this object.");