eq[2] = eqs[0][3]*eqs[1][2] - eqs[1][3]*eqs[0][2];
/* Parametrise x and y in terms of some t. */
- if (abs(eq[0]) < abs(eq[1])) {
+ if (fabs(eq[0]) < fabs(eq[1])) {
/* Parameter is x. */
xt[0] = 1; xt[1] = 0;
yt[0] = -eq[0]/eq[1]; yt[1] = eq[2]/eq[1];