From 19c1fd84d1fd75e9bfd55feb670fda87a2e02086 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Fri, 08 Feb 2019 08:32:29 +0000
Subject: [PATCH] Merge branch 'master' of ssh://git.penic.eu:29418/trisurf-ng
---
src/vertex.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/src/vertex.c b/src/vertex.c
index 38647aa..59a6419 100644
--- a/src/vertex.c
+++ b/src/vertex.c
@@ -1,3 +1,4 @@
+/* vim: set ts=4 sts=4 sw=4 noet : */
#include<stdlib.h>
#include<math.h>
#include<string.h>
@@ -5,6 +6,14 @@
#include "vertex.h"
#include "bond.h"
#include<stdio.h>
+
+ts_bool vertex_list_assign_id(ts_vertex_list *vlist, ts_uint id){
+ ts_uint i;
+ for(i=0;i<vlist->n;i++){
+ vlist->vtx[i]->id = id;
+ }
+ return TS_SUCCESS;
+}
ts_vertex_list *init_vertex_list(ts_uint N){
ts_int i;
@@ -191,6 +200,19 @@
return TS_SUCCESS;
}
+/** Calculates the triple product of vectors defined by vertices vtx1, vtx2 and vtx3, ($\mathrm{vtx}_1\cdot(\mathrm{vtx}_2\cross\mathrm{vtx}_3$):
+ * \begin{vmatrix}
+ * x_1 & y_1 & z_1 \\
+ * x_2-x_1 & y_2-y_1 & z_2-z_1\\
+ * x_3-x_1 & y_3-y_1 & z_3-z_1\\
+ * \end{vmatrix}
+ * where the vertices coordinates are denoted by corresponding vertex index number. Function is used to determine the orientation of area formed by triangle formed by the three given vertices.
+ *
+ * @param vtx1 is first vertex, according to which the orientation is calculated
+ * @param vtx2 is the second vertex
+ * @param vtx3 is the third vertex
+ * @returns directionality of the area of the triangle formed by vertices vtx1, vtx2 and vtx3. It is positive if vtx1, vtx2 and vtx3 are oriented counter-clockwise.
+*/
inline ts_double vtx_direct(ts_vertex *vtx1, ts_vertex *vtx2, ts_vertex *vtx3){
ts_double dX2=vtx2->x-vtx1->x;
ts_double dY2=vtx2->y-vtx1->y;
--
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