trisurf-ng.git - Gitblit

Samo Penic

2014-04-23 f06f5f9ad1e42a10d6a9367513e66c0c06295de2

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7958e9	1	#include<stdlib.h>
SP	2	#include<math.h>
	3	#include<stdio.h>
	4	#include "general.h"
	5	#include "vertex.h"
	6	#include "bond.h"
	7	#include "vesicle.h"
	8	#include "vertex.h"
	9	#include "triangle.h"
	10	#include "initial_distribution.h"
f74313	11	#include "energy.h"
1ab449	12	#include "poly.h"
8a6614	13	#include "io.h"
dc77e8	14	#include "sh.h"
459ff9	15	#include "shcomplex.h"
7958e9	16
SP	17	ts_vesicle *initial_distribution_dipyramid(ts_uint nshell, ts_uint ncmax1, ts_uint ncmax2, ts_uint ncmax3, ts_double stepsize){
1ab449	18	ts_fprintf(stdout,"Starting initial_distribution on vesicle with %u shells!...\n",nshell);
7958e9	19	ts_bool retval;
1ab449	20	ts_uint no_vertices=5nshellnshell+2;
SP	21	ts_vesicle *vesicle=init_vesicle(no_vertices,ncmax1,ncmax2,ncmax3,stepsize);
	22	vesicle->nshell=nshell;
	23	//retval = vtx_set_global_values(vesicle);
	24	retval = pentagonal_dipyramid_vertex_distribution(vesicle->vlist);
	25	retval = init_vertex_neighbours(vesicle->vlist);
	26	vesicle->vlist = init_sort_neighbours(vesicle->blist,vesicle->vlist);
b01cc1	27	// retval = init_vesicle_bonds(vesicle); // bonds are created in sort_neigh
1ab449	28	retval = init_triangles(vesicle);
SP	29	retval = init_triangle_neighbours(vesicle);
	30	retval = init_common_vertex_triangle_neighbours(vesicle);
	31	retval = init_normal_vectors(vesicle->tlist);
	32	retval = mean_curvature_and_energy(vesicle);
	33	ts_fprintf(stdout,"initial_distribution finished!\n");
41a035	34	if(retval);
7958e9	35	return vesicle;
SP	36	}
	37
	38
1ab449	39
SP	40	ts_vesicle create_vesicle_from_tape(ts_tape tape){
	41	ts_vesicle *vesicle;
bcf455	42	ts_vertex *vtx;
M	43
1ab449	44	vesicle=initial_distribution_dipyramid(tape->nshell,tape->ncxmax,tape->ncymax,tape->nczmax,tape->stepsize);
58230a	45	// Nucleus:
fe24d2	46	vesicle->R_nucleus=tape->R_nucleus*tape->R_nucleus;
M	47
	48	vesicle->clist->dmin_interspecies = tape->dmin_interspecies*tape->dmin_interspecies;
bcf455	49
58230a	50	//Initialize grafted polymers (brush):
624f81	51	vesicle->poly_list=init_poly_list(tape->npoly,tape->nmono, vesicle->vlist, vesicle);
1ab449	52	vesicle->spring_constant=tape->kspring;
SP	53	poly_assign_spring_const(vesicle);
bcf455	54
58230a	55	//Initialize filaments (polymers inside the vesicle):
M	56	vesicle->filament_list=init_poly_list(tape->nfil,tape->nfono, NULL, vesicle);
bcf455	57	poly_assign_filament_xi(vesicle,tape);
58230a	58
bcf455	59	ts_uint i,j;
M	60	for(i=0;i<vesicle->filament_list->n;i++){
	61	for(j=0;j<vesicle->filament_list->poly[i]->blist->n;j++){
	62	bond_vector(vesicle->filament_list->poly[i]->blist->bond[j]);
	63	vesicle->filament_list->poly[i]->blist->bond[j]->bond_length = sqrt(vtx_distance_sq(vesicle->filament_list->poly[i]->blist->bond[j]->vtx1,vesicle->filament_list->poly[i]->blist->bond[j]->vtx2));
	64	}
58230a	65	}
bcf455	66
M	67	for(i=0;i<vesicle->filament_list->n;i++){
	68	for(j=0;j<vesicle->filament_list->poly[i]->vlist->n;j++){
	69	vtx = vesicle->filament_list->poly[i]->vlist->vtx[j];
	70	if(vtx->bond_no == 2){
	71	vtx->energy = -(vtx->bond[0]->xvtx->bond[1]->x + vtx->bond[0]->yvtx->bond[1]->y + vtx->bond[0]->z*vtx->bond[1]->z)/vtx->bond[0]->bond_length/vtx->bond[1]->bond_length;
	72	}
	73	}
58230a	74	}
bcf455	75
ea1cce	76	for(i=0;i<vesicle->filament_list->n;i++){
M	77	vertex_list_assign_id(vesicle->filament_list->poly[i]->vlist,TS_ID_FILAMENT);
	78	}
bcf455	79
58230a	80	// vesicle->spring_constant=tape->kspring;
M	81	// poly_assign_spring_const(vesicle);
	82
1ab449	83
SP	84	vesicle->nshell=tape->nshell;
	85	vesicle->dmax=tape->dmaxtape->dmax; / dmax^2 in the vesicle dmax variable */
	86	vesicle->bending_rigidity=tape->xk0;
	87	vtx_set_global_values(vesicle); /* make xk0 default value for every vertex */
	88	ts_fprintf(stdout, "Tape setting: xk0=%e\n",tape->xk0);
	89	vesicle->stepsize=tape->stepsize;
	90	vesicle->clist->ncmax[0]=tape->ncxmax;
	91	vesicle->clist->ncmax[1]=tape->ncymax;
	92	vesicle->clist->ncmax[2]=tape->nczmax;
	93	vesicle->clist->max_occupancy=8; /* hard coded max occupancy? */
	94
	95	vesicle->pressure= tape->pressure;
	96	vesicle->pswitch=tape->pswitch;
632960	97	if(tape->shc>0){
459ff9	98	vesicle->sphHarmonics=complex_sph_init(vesicle->vlist,tape->shc);
632960	99	}
SP	100	else {
	101	vesicle->sphHarmonics=NULL;
	102	}
1ab449	103	return vesicle;
SP	104
	105	}
	106
	107
	108
	109
	110
7958e9	111	ts_bool pentagonal_dipyramid_vertex_distribution(ts_vertex_list *vlist){
SP	112	/* Some often used relations */
	113	const ts_double s1= sin(2.0*M_PI/5.0);
	114	const ts_double s2= sin(4.0*M_PI/5.0);
	115	const ts_double c1= cos(2.0*M_PI/5.0);
	116	const ts_double c2= cos(4.0*M_PI/5.0);
	117
	118	/* Calculates projection lenght of an edge bond to pentagram plane */
	119	const ts_double xl0=A0/(2.0*sin(M_PI/5.0));
	120	#ifdef TS_DOUBLE_DOUBLE
	121	const ts_double z0=sqrt(pow(A0,2)-pow(xl0,2));
	122	#endif
	123	#ifdef TS_DOUBLE_FLOAT
	124	const ts_double z0=sqrtf(powf(A0,2)-powf(xl0,2));
	125	#endif
	126	#ifdef TS_DOUBLE_LONGDOUBLE
	127	const ts_double z0=sqrtl(powl(A0,2)-powl(xl0,2));
	128	#endif
	129	// const z0=sqrt(A0A0 -xl0xl0); /* I could use pow function but if pow is used make a check on the float type. If float then powf, if long double use powl */
	130
	131	/placeholder for the pointer to vertex datastructure list... DIRTY: actual pointer points towards invalid address, one position before actual beginning of the list... This is to solve the difference between 1 based indexing in original program in fortran and 0 based indexing in C. All algorithms remain unchanged because of this!/
	132	ts_vertex **vtx=vlist->vtx -1 ;
	133
	134
	135	ts_uint nshell=(ts_uint)( sqrt((ts_double)(vlist->n-2)/5));
	136	// printf("nshell=%u\n",nshell);
	137	ts_uint i,n0; // some for loop prereq
	138	ts_int j,k;
	139	ts_double dx,dy; // end loop prereq
	140
	141	/* topmost vertex */
8f6a69	142	vtx[1]->x=0.0;
SP	143	vtx[1]->y=0.0;
	144	vtx[1]->z=z0*(ts_double)nshell;
7958e9	145
SP	146	/* starting from to in circular order on pentagrams */
	147	for(i=1;i<=nshell;i++){
	148	n0=2+5i(i-1)/2; //-1 would be for the reason that C index starts from 0
8f6a69	149	vtx[n0]->x=0.0;
SP	150	vtx[n0]->y=(ts_double)i*xl0;
	151	vtx[n0+i]->x=vtx[n0]->y*s1;
	152	vtx[n0+i]->y=vtx[n0]->y*c1;
	153	vtx[n0+2i]->x=vtx[n0]->ys2;
	154	vtx[n0+2i]->y=vtx[n0]->yc2;
	155	vtx[n0+3i]->x=-vtx[n0+2i]->x;
	156	vtx[n0+3i]->y=vtx[n0+2i]->y;
	157	vtx[n0+4*i]->x=-vtx[n0+i]->x;
	158	vtx[n0+4*i]->y=vtx[n0+i]->y;
7958e9	159	}
SP	160
	161	/* vertexes on the faces of the dipyramid */
	162	for(i=1;i<=nshell;i++){
	163	n0=2+5i(i-1)/2; // -1 would be because of C!
	164	for(j=1;j<=i-1;j++){
8f6a69	165	dx=(vtx[n0]->x-vtx[n0+4*i]->x)/(ts_double)i;
SP	166	dy=(vtx[n0]->y-vtx[n0+4*i]->y)/(ts_double)i;
	167	vtx[n0+4i+j]->x=(ts_double)jdx+vtx[n0+4*i]->x;
	168	vtx[n0+4i+j]->y=(ts_double)jdy+vtx[n0+4*i]->y;
7958e9	169	}
SP	170	for(k=0;k<=3;k++){ // I would be worried about zero starting of for
8f6a69	171	dx=(vtx[n0+(k+1)i]->x - vtx[n0+ki]->x)/(ts_double) i;
SP	172	dy=(vtx[n0+(k+1)i]->y - vtx[n0+ki]->y)/(ts_double) i;
7958e9	173	for(j=1; j<=i-1;j++){
8f6a69	174	vtx[n0+ki+j]->x= (ts_double)jdx+vtx[n0+k*i]->x;
SP	175	vtx[n0+ki+j]->y= (ts_double)jdy+vtx[n0+k*i]->y;
7958e9	176	}
SP	177	}
	178	}
	179
	180	for(i=1;i<=nshell;i++){
	181	n0= 2+ 5i(i-1)/2;
	182	for(j=0;j<=5*i-1;j++){
8f6a69	183	vtx[n0+j]->z= z0*(ts_double)(nshell-i); // I would be worried about zero starting of for
7958e9	184	}
SP	185	}
	186
	187	/* for botom part of dipyramide we calculate the positions of vertices */
	188	for(i=2+5nshell(nshell+1)/2;i<=vlist->n;i++){
8f6a69	189	vtx[i]->x=vtx[vlist->n - i +1]->x;
SP	190	vtx[i]->y=vtx[vlist->n - i +1]->y;
	191	vtx[i]->z=-vtx[vlist->n - i +1]->z;
7958e9	192	}
SP	193
	194	for(i=1;i<=vlist->n;i++){
	195	for(j=1;j<=vlist->n;j++){
	196	if(i!=j && vtx_distance_sq(vtx[i],vtx[j])<0.001){
	197	printf("Vertices %u and %u are the same!\n",i,j);
	198	}
	199	}
	200	}
	201	return TS_SUCCESS;
	202	}
	203
	204
	205
	206	ts_bool init_vertex_neighbours(ts_vertex_list *vlist){
	207	ts_vertex **vtx=vlist->vtx -1; // take a look at dipyramid function for comment.
	208	const ts_double eps=0.001; //TODO: find out if you can use EPS from math.h
	209	ts_uint i,j;
	210	ts_double dist2; // Square of distance of neighbours
	211	/this is not required if we zero all data in vertex structure at initialization /
	212	/if we force zeroing at initialization this for loop can safely be deleted /
	213	//for(i=1;i<=vlist->n;i++){
	214	// vtx[i].neigh_no=0;
	215	//}
	216	for(i=1;i<=vlist->n;i++){
	217	for(j=1;j<=vlist->n;j++){
	218	dist2=vtx_distance_sq(vtx[i],vtx[j]);
	219	if( (dist2>eps) && (dist2<(A0*A0+eps))){
	220	//if it is close enough, but not too much close (solves problem of comparing when i==j)
	221	vtx_add_neighbour(vtx[i],vtx[j]);
	222	}
	223	}
	224	// printf ("vertex %u ima %u sosedov!\n",i,vtx[i]->data->neigh_no);
	225	}
	226
	227	return TS_SUCCESS;
	228	}
	229
b01cc1	230	// TODO: with new datastructure can be rewritten. Partially it is done, but it is complicated.
SP	231	ts_vertex_list init_sort_neighbours(ts_bond_list blist,ts_vertex_list *vlist){
7958e9	232	ts_vertex **vtx=vlist->vtx -1; // take a look at dipyramid function for comment.
SP	233	ts_uint i,l,j,jj,jjj,k=0;
	234	ts_double eps=0.001; // Take a look if EPS from math.h can be used
	235
	236	/lets initialize memory for temporary vertex_list. Should we write a function instead /
b01cc1	237	ts_vertex_list *tvlist=vertex_list_copy(vlist);
7958e9	238	ts_vertex *tvtx=tvlist->vtx -1; / again to compensate for 0-indexing */
SP	239
	240	ts_double dist2; // Square of distance of neighbours
	241	ts_double direct; // Something, dont know what, but could be normal of some kind
	242	for(i=1;i<=vlist->n;i++){
	243	k++; // WHY i IS NOT GOOD??
8f6a69	244	vtx_add_cneighbour(blist,tvtx[k], tvtx[vtx[i]->neigh[0]->idx+1]); //always add 1st
7958e9	245	jjj=1;
SP	246	jj=1;
8f6a69	247	for(l=2;l<=vtx[i]->neigh_no;l++){
SP	248	for(j=2;j<=vtx[i]->neigh_no;j++){
	249	dist2=vtx_distance_sq(vtx[i]->neigh[j-1],vtx[i]->neigh[jj-1]);
	250	direct=vtx_direct(vtx[i],vtx[i]->neigh[j-1],vtx[i]->neigh[jj-1]);
	251	// TODO: check if fabs can be used with all floating point types!!
7958e9	252	if( (fabs(dist2-A0*A0)<=eps) && (direct>0.0) && (j!=jjj) ){
8f6a69	253	vtx_add_cneighbour(blist,tvtx[k],tvtx[vtx[i]->neigh[j-1]->idx+1]);
7958e9	254	jjj=jj;
SP	255	jj=j;
	256	break;
	257	}
	258	}
	259	}
	260	}
b01cc1	261	/* We use the temporary vertex for our main vertices and we abandon main
SP	262	* vertices, because their neighbours are not correctly ordered */
	263	// tvtx=vlist->vtx;
	264	// vlist->vtx=tvtx;
	265	// tvlist->vtx=vtx;
	266	vtx_list_free(vlist);
	267	/* Let's make a check if the number of bonds is correct */
	268	if((blist->n)!=3*(tvlist->n-2)){
	269	ts_fprintf(stderr,"Number of bonds is %u should be %u!\n", blist->n, 3*(tvlist->n-2));
	270	fatal("Number of bonds is not 3*(no_vertex-2).",4);
7958e9	271	}
SP	272
b01cc1	273	return tvlist;
7958e9	274	}
SP	275
	276
	277	ts_bool init_vesicle_bonds(ts_vesicle *vesicle){
	278	ts_vertex_list *vlist=vesicle->vlist;
	279	ts_bond_list *blist=vesicle->blist;
	280	ts_vertex **vtx=vesicle->vlist->vtx - 1; // Because of 0 indexing
	281	/* lets make correct clockwise ordering of in nearest neighbour list */
	282	ts_uint i,j,k;
	283	for(i=1;i<=vlist->n;i++){
	284	for(j=i+1;j<=vlist->n;j++){
8f6a69	285	for(k=0;k<vtx[i]->neigh_no;k++){ // has changed 0 to < instead of 1 and <=
SP	286	if(vtx[i]->neigh[k]==vtx[j]){ //if addresses matches it is the same
7958e9	287	bond_add(blist,vtx[i],vtx[j]);
SP	288	break;
	289	}
	290	}
	291	}
	292	}
	293	/* Let's make a check if the number of bonds is correct */
	294	if((blist->n)!=3*(vlist->n-2)){
	295	ts_fprintf(stderr,"Number of bonds is %u should be %u!\n", blist->n, 3*(vlist->n-2));
	296	fatal("Number of bonds is not 3*(no_vertex-2).",4);
	297	}
	298	return TS_SUCCESS;
	299	}
	300
	301
	302
	303	ts_bool init_triangles(ts_vesicle *vesicle){
	304	ts_uint i,j,jj,k;
	305	ts_vertex **vtx=vesicle->vlist->vtx -1; // difference between 0 indexing and 1 indexing
	306	ts_triangle_list *tlist=vesicle->tlist;
	307	ts_double dist, direct;
	308	ts_double eps=0.001; // can we use EPS from math.h?
	309	k=0;
	310	for(i=1;i<=vesicle->vlist->n;i++){
8f6a69	311	for(j=1;j<=vtx[i]->neigh_no;j++){
SP	312	for(jj=1;jj<=vtx[i]->neigh_no;jj++){
7958e9	313	// ts_fprintf(stderr,"%u: (%u,%u) neigh_no=%u ",i,j,jj,vtx[i].neigh_no);
SP	314	// ts_fprintf(stderr,"%e, %e",vtx[i].neigh[j-1]->x,vtx[i].neigh[jj-1]->x);
8f6a69	315	dist=vtx_distance_sq(vtx[i]->neigh[j-1],vtx[i]->neigh[jj-1]);
SP	316	direct=vtx_direct(vtx[i],vtx[i]->neigh[j-1],vtx[i]->neigh[jj-1]);
	317	// TODO: same as above
	318	if(fabs(dist-A0*A0)<=eps && direct < 0.0 && vtx[i]->neigh[j-1]->idx+1 > i && vtx[i]->neigh[jj-1]->idx+1 >i){
	319	triangle_add(tlist,vtx[i],vtx[i]->neigh[j-1],vtx[i]->neigh[jj-1]);
7958e9	320	}
SP	321	}
	322	}
	323	}
	324	/* We check if all triangles have 3 vertices and if the number of triangles
	325	* matches the theoretical value.
	326	*/
	327	for(i=0;i<tlist->n;i++){
	328	k=0;
	329	for(j=0;j<3;j++){
41a035	330	if(tlist->tria[i]->vertex[j]!=NULL)
7958e9	331	k++;
SP	332	}
	333	if(k!=3){
8f6a69	334	fatal("Some triangles have less than 3 vertices..",4);
7958e9	335	}
SP	336	}
	337	if(tlist->n!=2*(vesicle->vlist->n -2)){
	338	ts_fprintf(stderr,"The number of triangles is %u but should be %u!\n",tlist->n,2*(vesicle->vlist->n -2));
	339	fatal("The number of triangles doesn't match 2*(no_vertex -2).",4);
	340	}
	341	return TS_SUCCESS;
	342	}
	343
	344
	345
	346	ts_bool init_triangle_neighbours(ts_vesicle *vesicle){
	347	ts_uint i,j,nobo;
	348	ts_vertex i1,i2,i3,j1,j2,j3;
	349	// ts_vertex **vtx=vesicle->vlist->vtx -1; // difference between 0 indexing and 1 indexing
	350	ts_triangle_list *tlist=vesicle->tlist;
	351	ts_triangle **tria=tlist->tria -1;
	352	nobo=0;
	353	for(i=1;i<=tlist->n;i++){
41a035	354	i1=tria[i]->vertex[0];
SP	355	i2=tria[i]->vertex[1];
	356	i3=tria[i]->vertex[2];
7958e9	357	for(j=1;j<=tlist->n;j++){
SP	358	if(j==i) continue;
41a035	359	j1=tria[j]->vertex[0];
SP	360	j2=tria[j]->vertex[1];
	361	j3=tria[j]->vertex[2];
7958e9	362	if((i1==j1 && i3==j2) \|\| (i1==j2 && i3==j3) \|\| (i1==j3 && i3==j1)){
SP	363	triangle_add_neighbour(tria[i],tria[j]);
	364	nobo++;
	365	}
	366	}
	367	}
	368	for(i=1;i<=tlist->n;i++){
41a035	369	i1=tria[i]->vertex[0];
SP	370	i2=tria[i]->vertex[1];
	371	i3=tria[i]->vertex[2];
7958e9	372	for(j=1;j<=tlist->n;j++){
SP	373	if(j==i) continue;
41a035	374	j1=tria[j]->vertex[0];
SP	375	j2=tria[j]->vertex[1];
	376	j3=tria[j]->vertex[2];
7958e9	377	if((i1==j1 && i2==j3) \|\| (i1==j3 && i2==j2) \|\| (i1==j2 && i2==j1)){
SP	378	triangle_add_neighbour(tria[i],tria[j]);
	379	nobo++;
	380	}
	381	}
	382	}
	383	for(i=1;i<=tlist->n;i++){
41a035	384	i1=tria[i]->vertex[0];
SP	385	i2=tria[i]->vertex[1];
	386	i3=tria[i]->vertex[2];
7958e9	387	for(j=1;j<=tlist->n;j++){
SP	388	if(j==i) continue;
41a035	389	j1=tria[j]->vertex[0];
SP	390	j2=tria[j]->vertex[1];
	391	j3=tria[j]->vertex[2];
7958e9	392	if((i2==j1 && i3==j3) \|\| (i2==j3 && i3==j2) \|\| (i2==j2 && i3==j1)){
SP	393	triangle_add_neighbour(tria[i],tria[j]);
	394	nobo++;
	395	}
	396	}
	397	}
	398	if(nobo != vesicle->blist->n*2) {
	399	ts_fprintf(stderr,"Number of triangles= %u, number of bonds= %u\n",nobo/2, vesicle->blist->n);
	400	fatal("Number of triangle neighbour pairs differs from double the number of bonds!",4);
	401	}
	402	return TS_SUCCESS;
	403	}
	404
	405
	406	ts_bool init_common_vertex_triangle_neighbours(ts_vesicle *vesicle){
	407	ts_uint i,j,jp,k;
	408	ts_vertex k1,k2,k3,k4,*k5;
	409	ts_vertex **vtx=vesicle->vlist->vtx -1; // difference between 0 indexing and 1 indexing
	410	ts_triangle_list *tlist=vesicle->tlist;
	411	ts_triangle **tria=tlist->tria -1;
	412
	413	for(i=1;i<=vesicle->vlist->n;i++){
8f6a69	414	for(j=1;j<=vtx[i]->neigh_no;j++){
SP	415	k1=vtx[i]->neigh[j-1];
7958e9	416	jp=j+1;
8f6a69	417	if(j == vtx[i]->neigh_no) jp=1;
SP	418	k2=vtx[i]->neigh[jp-1];
7958e9	419	for(k=1;k<=tlist->n;k++){ // VERY NON-OPTIMAL!!! too many loops (vlist.n * vtx.neigh * tlist.n )!
41a035	420	k3=tria[k]->vertex[0];
SP	421	k4=tria[k]->vertex[1];
	422	k5=tria[k]->vertex[2];
7958e9	423	// ts_fprintf(stderr,"%u %u: k=(%u %u %u)\n",k1,k2,k3,k4,k5);
SP	424	if((vtx[i]==k3 && k1==k4 && k2==k5) \|\|
	425	(vtx[i]==k4 && k1==k5 && k2==k3) \|\|
	426	(vtx[i]==k5 && k1==k3 && k2==k4)){
b01cc1	427
SP	428	//TODO: probably something wrong with neighbour distribution.
	429	// if(vtx[i]==k3 \|\| vtx[i]==k4 \|\| vtx[i]==k5){
dac2e5	430	// if(i==6) ts_fprintf(stdout, "Vtx[%u] > Added to tristar!\n",i);
7958e9	431	vertex_add_tristar(vtx[i],tria[k]);
SP	432	}
	433	}
	434	}
	435	/* ts_fprintf(stderr,"TRISTAR for %u (%u):",i-1,vtx[i].tristar_no);
	436	for(j=0;j<vtx[i].tristar_no;j++){
	437	ts_fprintf(stderr," %u,",vtx[i].tristar[j]->idx);
	438	}
	439	ts_fprintf(stderr,"\n"); */
	440	}
	441	return TS_SUCCESS;
	442	}
	443
	444
	445	ts_bool init_normal_vectors(ts_triangle_list *tlist){
	446	/* Normals point INSIDE vesicle */
	447	ts_uint k;
	448	ts_triangle **tria=tlist->tria -1; //for 0 indexing
	449	for(k=1;k<=tlist->n;k++){
	450	triangle_normal_vector(tria[k]);
	451	}
	452	return TS_SUCCESS;
	453	}