From 17fe35ccc428e18dd226e07d5517c4816ef6be44 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Mon, 19 Apr 2021 12:23:07 +0000
Subject: [PATCH] Work done previously

---
 src/energy.c |  207 +++++++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 183 insertions(+), 24 deletions(-)

diff --git a/src/energy.c b/src/energy.c
index 5fe0d5b..5913863 100644
--- a/src/energy.c
+++ b/src/energy.c
@@ -6,6 +6,19 @@
 #include "bond.h"
 #include<math.h>
 #include<stdio.h>
+#include <gsl/gsl_vector_complex.h>
+#include <gsl/gsl_matrix.h>
+#include <gsl/gsl_eigen.h>
+
+
+
+int cmpfunc(const void *x, const void *y)
+{
+	double diff=	fabs(*(double*)x) - fabs(*(double*)y);
+	if(diff<0) return 1;
+	else return -1;
+}
+
 
 
 /** @brief Wrapper that calculates energy of every vertex in vesicle
@@ -88,7 +101,7 @@
  * @returns TS_SUCCESS on successful calculation.
 */
 inline ts_bool energy_vertex(ts_vertex *vtx){
-    ts_uint jj, i, j, cnt=0;
+    ts_uint jj, i, j;
     ts_double edge_vector_x[7]={0,0,0,0,0,0,0};
     ts_double edge_vector_y[7]={0,0,0,0,0,0,0};
     ts_double edge_vector_z[7]={0,0,0,0,0,0,0};
@@ -101,48 +114,194 @@
     ts_double vertex_normal_x=0.0;
     ts_double vertex_normal_y=0.0;
     ts_double vertex_normal_z=0.0;
-    ts_triangle *triedge[2]={NULL,NULL};
+//    ts_triangle *triedge[2]={NULL,NULL};
 
+    ts_uint nei,neip,neim;
+    ts_vertex *it, *k, *kp,*km;
+    ts_triangle *lm=NULL, *lp=NULL;
     ts_double sumnorm;
+    ts_double temp_length;
 
+
+    ts_double Se11, Se21, Se22, Se31, Se32, Se33;
+    ts_double Pv11, Pv21, Pv22, Pv31, Pv32, Pv33;
+    ts_double We;
+    ts_double Av, We_Av;
+
+	ts_double eigenval[3];
+
+	gsl_matrix *gsl_Sv=gsl_matrix_alloc(3,3);
+	gsl_vector *Sv_eigen=gsl_vector_alloc(3);
+	gsl_eigen_symm_workspace *workspace=gsl_eigen_symm_alloc(3);
+
+	ts_double mprod[7], phi[7], he[7];
+	ts_double Sv[3][3]={{0,0,0},{0,0,0},{0,0,0}};
     // Here edge vector is calculated
 //    fprintf(stderr, "Vertex has neighbours=%d\n", vtx->neigh_no);
+
+
+
+
+	Av=0;
+	for(i=0; i<vtx->tristar_no; i++){
+		vertex_normal_x=vertex_normal_x + vtx->tristar[i]->xnorm*vtx->tristar[i]->area;
+		vertex_normal_y=vertex_normal_y + vtx->tristar[i]->ynorm*vtx->tristar[i]->area;
+		vertex_normal_z=vertex_normal_z + vtx->tristar[i]->znorm*vtx->tristar[i]->area;
+		Av+=vtx->tristar[i]->area/3;
+	}
+	temp_length=sqrt(pow(vertex_normal_x,2)+pow(vertex_normal_y,2)+pow(vertex_normal_z,2));
+	vertex_normal_x=vertex_normal_x/temp_length;
+	vertex_normal_y=vertex_normal_y/temp_length;
+	vertex_normal_z=vertex_normal_z/temp_length;
+
+	Pv11=1-vertex_normal_x*vertex_normal_x;
+	Pv22=1-vertex_normal_y*vertex_normal_y;
+	Pv33=1-vertex_normal_z*vertex_normal_z;
+	Pv21=vertex_normal_x*vertex_normal_y;
+	Pv31=vertex_normal_x*vertex_normal_z;
+	Pv32=vertex_normal_y*vertex_normal_z;
+
+
+
+
     for(jj=0;jj<vtx->neigh_no;jj++){
 	edge_vector_x[jj]=vtx->neigh[jj]->x-vtx->x;
 	edge_vector_y[jj]=vtx->neigh[jj]->y-vtx->y;
 	edge_vector_z[jj]=vtx->neigh[jj]->z-vtx->z;
-	// We find lm and lp from k->tristar !
-	cnt=0;
-    	for(i=0;i<vtx->tristar_no;i++){
-        	for(j=0;j<vtx->neigh[jj]->tristar_no;j++){
-            		if((vtx->tristar[i] == vtx->neigh[jj]->tristar[j])){ //ce gre za skupen trikotnik
-                		triedge[cnt]=vtx->tristar[i];
-				cnt++;
-            		}
+
+	//Here we calculate normalized edge vector
+
+	temp_length=sqrt(edge_vector_x[jj]*edge_vector_x[jj]+edge_vector_y[jj]*edge_vector_y[jj]+edge_vector_z[jj]*edge_vector_z[jj]);
+	edge_vector_x[jj]=edge_vector_x[jj]/temp_length;
+	edge_vector_y[jj]=edge_vector_y[jj]/temp_length;
+	edge_vector_z[jj]=edge_vector_z[jj]/temp_length;
+
+	//end normalization
+//	printf("(%f %f %f)\n", vertex_normal_x, vertex_normal_y, vertex_normal_z);
+
+
+	it=vtx;
+	k=vtx->neigh[jj];
+	nei=0;
+    	for(i=0;i<it->neigh_no;i++){ // Finds the nn of it, that is k 
+        	if(it->neigh[i]==k){
+            	nei=i;
+            	break;
         	}
     	}
-	if(cnt!=2) fatal("ts_energy_vertex: both triangles not found!", 133);
-	sumnorm=sqrt( pow((triedge[0]->xnorm + triedge[1]->xnorm),2) + pow((triedge[0]->ynorm + triedge[1]->ynorm), 2) + pow((triedge[0]->znorm + triedge[1]->znorm), 2));
+    	neip=nei+1;  // I don't like it.. Smells like I must have it in correct order
+    	neim=nei-1;
+    	if(neip>=it->neigh_no) neip=0;
+    	if((ts_int)neim<0) neim=it->neigh_no-1; /* casting is essential... If not
+there the neim is never <0 !!! */
+  //  fprintf(stderr,"The numbers are: %u %u\n",neip, neim);
+    	km=it->neigh[neim];  // We located km and kp
+    	kp=it->neigh[neip];
 
-	edge_normal_x[jj]=(triedge[0]->xnorm+ triedge[1]->xnorm)/sumnorm;
-	edge_normal_y[jj]=(triedge[0]->ynorm+ triedge[1]->ynorm)/sumnorm;
-	edge_normal_z[jj]=(triedge[0]->znorm+ triedge[1]->znorm)/sumnorm;
+    	if(km==NULL || kp==NULL){
+        	fatal("energy_vertex: cannot determine km and kp!",233);
+    	}
+
+   for(i=0;i<it->tristar_no;i++){
+        for(j=0;j<k->tristar_no;j++){
+            if((it->tristar[i] == k->tristar[j])){ //ce gre za skupen trikotnik
+                if((it->tristar[i]->vertex[0] == km || it->tristar[i]->vertex[1]
+== km || it->tristar[i]->vertex[2]== km )){
+                lm=it->tristar[i];
+         //       lmidx=i;
+                }
+                else
+                {
+                lp=it->tristar[i];
+         //       lpidx=i;
+                }
+
+            }
+        }
+    }
+if(lm==NULL || lp==NULL) fatal("energy_vertex: Cannot find triangles lm and lp!",233);
+
+	//Triangle normals are NORMALIZED!
+
+	sumnorm=sqrt( pow((lm->xnorm + lp->xnorm),2) + pow((lm->ynorm + lp->ynorm), 2) + pow((lm->znorm + lp->znorm), 2));
+
+	edge_normal_x[jj]=(lm->xnorm+ lp->xnorm)/sumnorm;
+	edge_normal_y[jj]=(lm->ynorm+ lp->ynorm)/sumnorm;
+	edge_normal_z[jj]=(lm->znorm+ lp->znorm)/sumnorm;
 
 
 	edge_binormal_x[jj]=(edge_normal_y[jj]*edge_vector_z[jj])-(edge_normal_z[jj]*edge_vector_y[jj]);
 	edge_binormal_y[jj]=-(edge_normal_x[jj]*edge_vector_z[jj])+(edge_normal_z[jj]*edge_vector_x[jj]);
 	edge_binormal_z[jj]=(edge_normal_x[jj]*edge_vector_y[jj])-(edge_normal_y[jj]*edge_vector_x[jj]);
 
-	printf("(%f %f %f); (%f %f %f); (%f %f %f), %d\n", edge_vector_x[jj], edge_vector_y[jj], edge_vector_z[jj], edge_normal_x[jj], edge_normal_y[jj], edge_normal_z[jj], edge_binormal_x[jj], edge_binormal_y[jj], edge_binormal_z[jj],triedge[0]->idx);
 
-    }
-	for(i=0; i<vtx->tristar_no; i++){
-		vertex_normal_x=vertex_normal_x + vtx->tristar[i]->xnorm*vtx->tristar[i]->area;
-		vertex_normal_y=vertex_normal_y + vtx->tristar[i]->ynorm*vtx->tristar[i]->area;
-		vertex_normal_z=vertex_normal_z + vtx->tristar[i]->znorm*vtx->tristar[i]->area;
-	}
-	printf("(%f %f %f)\n", vertex_normal_x, vertex_normal_y, vertex_normal_z);
-	vtx->energy=0.0;
+	mprod[jj]=it->x*(k->y*edge_vector_z[jj]-edge_vector_y[jj]*k->z)-it->y*(k->x*edge_vector_z[jj]-k->z*edge_vector_x[jj])+it->z*(k->x*edge_vector_y[jj]-k->y*edge_vector_x[jj]);
+	phi[jj]=copysign(acos(lm->xnorm*lp->xnorm+lm->ynorm*lp->ynorm+lm->znorm*lp->znorm-1e-15),mprod[jj])+M_PI;
+//	printf("ACOS arg=%e\n", lm->xnorm*lp->xnorm+lm->ynorm*lp->ynorm+lm->znorm*lp->znorm);
+	//he was multiplied with 2 before...
+	he[jj]=sqrt( pow((edge_vector_x[jj]),2) + pow((edge_vector_y[jj]), 2) + pow((edge_vector_z[jj]), 2))*cos(phi[jj]/2.0);
+//	printf("phi[%d]=%f\n", jj,phi[jj]);
+
+	Se11=edge_binormal_x[jj]*edge_binormal_x[jj]*he[jj];
+	Se21=edge_binormal_x[jj]*edge_binormal_y[jj]*he[jj];
+	Se22=edge_binormal_y[jj]*edge_binormal_y[jj]*he[jj];
+	Se31=edge_binormal_x[jj]*edge_binormal_z[jj]*he[jj];
+	Se32=edge_binormal_y[jj]*edge_binormal_z[jj]*he[jj];
+	Se33=edge_binormal_z[jj]*edge_binormal_z[jj]*he[jj];
+
+	We=vertex_normal_x*edge_normal_x[jj]+vertex_normal_y*edge_normal_y[jj]+vertex_normal_z*edge_normal_z[jj];
+	We_Av=We/Av;
+
+	Sv[0][0]+=We_Av* ( Pv11*(Pv11*Se11+Pv21*Se21+Pv31*Se31)+Pv21*(Pv11*Se21+Pv21*Se22+Pv31*Se32)+Pv31*(Pv11*Se31+Pv21*Se32+Pv31*Se33) );
+	Sv[0][1]+=We_Av* (Pv21*(Pv11*Se11+Pv21*Se21+Pv31*Se31)+Pv22*(Pv11*Se21+Pv21*Se22+Pv31*Se32)+Pv32*(Pv11*Se31+Pv21*Se32+Pv31*Se33));
+	Sv[0][2]+=We_Av* (Pv31*(Pv11*Se11+Pv21*Se21+Pv31*Se31)+Pv32*(Pv11*Se21+Pv21*Se22+Pv31*Se32)+Pv33*(Pv11*Se31+Pv21*Se32+Pv31*Se33));
+	
+	Sv[1][0]+=We_Av* (Pv11*(Pv21*Se11+Pv22*Se21+Pv32*Se31)+Pv21*(Pv21*Se21+Pv22*Se22+Pv32*Se32)+Pv31*(Pv21*Se31+Pv22*Se32+Pv32*Se33));
+	Sv[1][1]+=We_Av* (Pv21*(Pv21*Se11+Pv22*Se21+Pv32*Se31)+Pv22*(Pv21*Se21+Pv22*Se22+Pv32*Se32)+Pv32*(Pv21*Se31+Pv22*Se32+Pv32*Se33));
+	Sv[1][2]+=We_Av* (Pv31*(Pv21*Se11+Pv22*Se21+Pv32*Se31)+Pv32*(Pv21*Se21+Pv22*Se22+Pv32*Se32)+Pv33*(Pv21*Se31+Pv22*Se32+Pv32*Se33));
+
+	Sv[2][0]+=We_Av* (Pv11*(Pv31*Se11+Pv32*Se21+Pv33*Se31)+Pv21*(Pv31*Se21+Pv32*Se22+Pv33*Se32)+Pv31*(Pv31*Se31+Pv32*Se32+Pv33*Se33));
+	Sv[2][1]+=We_Av* (Pv21*(Pv31*Se11+Pv32*Se21+Pv33*Se31)+Pv22*(Pv31*Se21+Pv32*Se22+Pv33*Se32)+Pv32*(Pv31*Se31+Pv32*Se32+Pv33*Se33));
+	Sv[2][2]+=We_Av* (Pv31*(Pv31*Se11+Pv32*Se21+Pv33*Se31)+Pv32*(Pv31*Se21+Pv32*Se22+Pv33*Se32)+Pv33*(Pv31*Se31+Pv32*Se32+Pv33*Se33));
+//	printf("(%f %f %f); (%f %f %f); (%f %f %f)\n", edge_vector_x[jj], edge_vector_y[jj], edge_vector_z[jj], edge_normal_x[jj], edge_normal_y[jj], edge_normal_z[jj], edge_binormal_x[jj], edge_binormal_y[jj], edge_binormal_z[jj]);
+
+    } // END FOR JJ
+
+	gsl_matrix_set(gsl_Sv, 0,0, Sv[0][0]);
+	gsl_matrix_set(gsl_Sv, 0,1, Sv[0][1]);
+	gsl_matrix_set(gsl_Sv, 0,2, Sv[0][2]);
+	gsl_matrix_set(gsl_Sv, 1,0, Sv[1][0]);
+	gsl_matrix_set(gsl_Sv, 1,1, Sv[1][1]);
+	gsl_matrix_set(gsl_Sv, 1,2, Sv[1][2]);
+	gsl_matrix_set(gsl_Sv, 2,0, Sv[2][0]);
+	gsl_matrix_set(gsl_Sv, 2,1, Sv[2][1]);
+	gsl_matrix_set(gsl_Sv, 2,2, Sv[2][2]);
+
+//	printf("Se= %f, %f, %f\n    %f, %f, %f\n    %f, %f, %f\n", Se11, Se21, Se31, Se21, Se22, Se32, Se31, Se32, Se33);
+//	printf("Pv= %f, %f, %f\n    %f, %f, %f\n    %f, %f, %f\n", Pv11, Pv21, Pv31, Pv21, Pv22, Pv32, Pv31, Pv32, Pv33);
+//	printf("Sv= %f, %f, %f\n    %f, %f, %f\n    %f, %f, %f\n", Sv[0][0], Sv[0][1], Sv[0][2], Sv[1][0], Sv[1][1], Sv[1][2], Sv[2][0], Sv[2][1], Sv[2][2]);
+
+
+	gsl_eigen_symm(gsl_Sv, Sv_eigen, workspace);
+
+//	printf("Eigenvalues: %f, %f, %f\n", gsl_vector_get(Sv_eigen, 0),gsl_vector_get(Sv_eigen, 1), gsl_vector_get(Sv_eigen, 2) );
+//	printf("Eigenvalues: %f, %f, %f\n", gsl_matrix_get(evec, 0,0),gsl_matrix_get(evec, 0,1), gsl_matrix_get(evec, 0,2) );
+
+
+	eigenval[0]= gsl_vector_get(Sv_eigen, 0);
+	eigenval[1]= gsl_vector_get(Sv_eigen, 1);
+	eigenval[2]= gsl_vector_get(Sv_eigen, 2);
+
+	qsort(eigenval, 3, sizeof(ts_double), cmpfunc);
+//	printf("Eigenvalues: %f, %f, %f\n", eigenval[0], eigenval[1], eigenval[2] );
+
+
+	vtx->energy=(pow(eigenval[0]+eigenval[1],2))*Av;
+
+	gsl_matrix_free(gsl_Sv);
+	gsl_vector_free(Sv_eigen);
+//	gsl_matrix_free(evec);
+	gsl_eigen_symm_free(workspace);
 	return TS_SUCCESS;
 }
 

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