diff options
| -rw-r--r-- | src/ProjectionTangential.cxx | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/ProjectionTangential.cxx b/src/ProjectionTangential.cxx index ce5b28a..a108e25 100644 --- a/src/ProjectionTangential.cxx +++ b/src/ProjectionTangential.cxx @@ -48,18 +48,21 @@ ProjectionTangential::comp_params(Hill *m1, Hill *m2, ViewParams *parms) { Hill *tmp; double a_center_tmp, scale_tmp, a_nick_tmp; - if (m1->x > m2->x) { + scale_tmp = comp_scale(m1->alph, m2->alph, m1->x, m2->x); + if (isnan(scale_tmp) || scale_tmp < 0.0) { + // try again with mountains swapped tmp = m1; m1 = m2; m2 = tmp; + scale_tmp = comp_scale(m1->alph, m2->alph, m1->x, m2->x); } a_center_tmp = comp_center_angle(m1->alph, m2->alph, m1->x, m2->x); - scale_tmp = comp_scale(m1->alph, m2->alph, m1->x, m2->x); a_nick_tmp = atan ((m1->y + tan(m1->a_nick) * parms->scale) / (parms->scale - m1->y * tan(m1->a_nick))); - if (isnan(a_center_tmp) || isnan(scale_tmp) || isnan(a_nick_tmp)) { + if (isnan(a_center_tmp) || isnan(scale_tmp) || + scale_tmp < 0.0 || isnan(a_nick_tmp)) { return 1; } else { @@ -178,7 +181,7 @@ double ProjectionTangential::comp_scale(double a1, double a2, double d1, double d2) { double sign1 = 1.0; double sc, tan_a1, tan_a2; - + tan_a1 = tan(a1); tan_a2 = tan(a2); |