- moved mesh_getVertexCos to mesh.c and prototyped

- make mesh_modifier build vertex locations on demand

source/blender/blenkernel/BKE_mesh.h

@@ -93,6 +93,10 @@ void mesh_calculate_vertex_normals	(struct Mesh *me);
 	 */
 void mesh_calc_normals(struct MVert *mverts, int numVerts, struct MFace *mfaces, int numFaces, float **faceNors_r);
 
+	/* Return a newly MEM_malloc'd array of all the mesh vertex locations
+	 * (_numVerts_r_ may be NULL) */
+float (*mesh_getVertexCos(struct Mesh *me, int *numVerts_r))[3];
+
 #ifdef __cplusplus
 }
 #endif

source/blender/blenkernel/intern/DerivedMesh.c

@@ -1123,18 +1123,6 @@ DerivedMesh *derivedmesh_from_displistmesh(DispListMesh *dlm)
 
 typedef float vec3f[3];
 
-static vec3f *mesh_getVertexCos(Mesh *me, int *numVerts_r)
-{
-	int i, numVerts = *numVerts_r = me->totvert;
-	float (*cos)[3] = MEM_mallocN(sizeof(*cos)*numVerts, "vertexcos1");
-
-	for (i=0; i<numVerts; i++) {
-		VECCOPY(cos[i], me->mvert[i].co);
-	}
-
-	return cos;
-}
-
 static void mesh_calc_modifiers(Object *ob, float (*inputVertexCos)[3], DerivedMesh **deform_r, DerivedMesh **final_r, int useRenderParams, int useDeform)
 {
 	Mesh *me = ob->data;

source/blender/blenkernel/intern/deform.c

@@ -59,6 +59,7 @@
 #include "BKE_object.h"
 #include "BKE_softbody.h"
 #include "BKE_utildefines.h"
+#include "BKE_mesh.h"
 
 #include "BLI_blenlib.h"
 #include "BLI_arithb.h"
@@ -231,31 +232,14 @@ void mesh_modifier(Object *ob, float (**vertexCos_r)[3])
 {
 	MVert *origMVert=NULL;
 	Mesh *me= ob->data;
-	int a, done=0;
+	float (*vertexCos)[3] = NULL;
-	float (*vertexCos)[3];
+	int a;
 
-	*vertexCos_r = NULL;
-	
 	do_mesh_key(me);
-	
-	/* conditions if it's needed */
-	if(ob->hooks.first);
-	else if(ob->effect.first);	// weak... particles too
-	else if(ob->parent && ob->parent->type==OB_LATTICE);
-	else if(ob->parent && ob->partype==PARSKEL); 
-	else if(ob->softflag & OB_SB_ENABLE);
-	else return;
-	
-	if(me->totvert==0) return;
-	
-	vertexCos = MEM_mallocN(sizeof(*vertexCos)*me->totvert, "mm_vertexcos");
-	for (a=0; a<me->totvert; a++) {
-		VECCOPY(vertexCos[a], me->mvert[a].co);
-	}
 
 	/* hooks */
 	if(ob->hooks.first) {
-		done= 1;
+		if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 		
 		/* NULL signals initialize */
 		hook_object_deform(ob, 0, NULL);
@@ -272,50 +256,45 @@ void mesh_modifier(Object *ob, float (**vertexCos_r)[3])
 	
 		for (wav= ob->effect.first; wav; wav= wav->next) {
 			if(wav->type==EFF_WAVE) {
+				if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 				init_wave_deform(wav);
 
 				for(a=0; a<me->totvert; a++) {
 					calc_wave_deform(wav, ctime, vertexCos[a]);
 				}
-
-				done = 1;
 			}
 		}
 	}
 
 	if((ob->softflag & OB_SB_ENABLE) && !(ob->softflag & OB_SB_POSTDEF)) {
-		done= 1;
+		if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 		sbObjectStep(ob, (float)G.scene->r.cfra, vertexCos);
 	}
 
 	if (ob->parent && me->totvert) {
 		if(ob->parent->type==OB_CURVE && ob->partype==PARSKEL) {
+			if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 			curve_deform_verts(ob->parent, ob, vertexCos, me->totvert);
-			done= 1;
 		}
 		else if(ob->parent->type==OB_LATTICE) {
+			if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 			lattice_deform_verts(ob->parent, ob, vertexCos, me->totvert);
-			done= 1;
 		}
 		else if(ob->parent->type==OB_ARMATURE && ob->partype==PARSKEL) {
 				// misleading making displists... very bad
 			if (ob->parent!=G.obedit) {
+				if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 				armature_deform_verts(ob->parent, ob, vertexCos, me->totvert);
 			}
-			done= 1;
 		}
 	}
 
 	if((ob->softflag & OB_SB_ENABLE) && (ob->softflag & OB_SB_POSTDEF)) {
-		done= 1;
+		if (!vertexCos) vertexCos = mesh_getVertexCos(me, NULL);
 		sbObjectStep(ob, (float)G.scene->r.cfra, vertexCos);
 	}
 
-	if (done) {
+	*vertexCos_r = vertexCos;
-		*vertexCos_r = vertexCos;
-	} else {
-		MEM_freeN(vertexCos_r);
-	}
 }
 
 int curve_modifier(Object *ob, char mode)

source/blender/blenkernel/intern/mesh.c

@@ -1283,3 +1283,16 @@ void mesh_calc_normals(MVert *mverts, int numVerts, MFace *mfaces, int numFaces,
 		MEM_freeN(fnors);
 	}
 }
+
+float (*mesh_getVertexCos(Mesh *me, int *numVerts_r))[3]
+{
+	int i, numVerts = me->totvert;
+	float (*cos)[3] = MEM_mallocN(sizeof(*cos)*numVerts, "vertexcos1");
+
+	if (numVerts_r) *numVerts_r = numVerts;
+	for (i=0; i<numVerts; i++) {
+		VECCOPY(cos[i], me->mvert[i].co);
+	}
+
+	return cos;
+}