Added sh_init and sh_free for given datastructure.

Samo Penic

2012-06-07 074a178761daa61a419ef9c2f38f9cd7adc0cdc7

 src/triangle.c

@@ -194,12 +194,12 @@
  */
ts_bool triangle_normal_vector(ts_triangle *tria){
   ts_double x21,x31,y21,y31,z21,z31,xden;
   x21=tria->vertex[1]->data->x - tria->vertex[0]->data->x;
   x31=tria->vertex[2]->data->x - tria->vertex[0]->data->x;
   y21=tria->vertex[1]->data->y - tria->vertex[0]->data->y;
   y31=tria->vertex[2]->data->y - tria->vertex[0]->data->y;
   z21=tria->vertex[1]->data->z - tria->vertex[0]->data->z;
   z31=tria->vertex[2]->data->z - tria->vertex[0]->data->z;
   x21=tria->vertex[1]->x - tria->vertex[0]->x;
   x31=tria->vertex[2]->x - tria->vertex[0]->x;
   y21=tria->vertex[1]->y - tria->vertex[0]->y;
   y31=tria->vertex[2]->y - tria->vertex[0]->y;
   z21=tria->vertex[1]->z - tria->vertex[0]->z;
   z31=tria->vertex[2]->z - tria->vertex[0]->z;

   tria->xnorm=y21*z31 - z21*y31;
   tria->ynorm=z21*x31 - x21*z31;