#include "fracture.h"

double get_conductivity(net_t *inst, double *voltage, cholmod_common *c) {
	if (inst->voltage_bound) {
		double tot_cur = 0;
		for (unsigned int i = 0; i < inst->graph->num_spanning_edges; i++) {
			unsigned int e = inst->graph->spanning_edges[i];
			if (!inst->fuses[e]) {
				unsigned int v1 = inst->graph->ev[2*e];
				unsigned int v2 = inst->graph->ev[2*e+1];
				double v1y = inst->graph->vert_coords[2 * v1 + 1];
				double v2y = inst->graph->vert_coords[2 * v2 + 1];
				unsigned int s1 = v1y < v2y ? v1 : v2;
				unsigned int s2 = v1y < v2y ? v2 : v1;
				tot_cur += voltage[s1] - voltage[s2];
			}
		}

		return fabs(tot_cur);
	} else {
		return 1 / fabs(voltage[inst->graph->nv] - voltage[inst->graph->nv + 1]);
	}
}