diff options
| -rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index a26824bd2b5..e7c1fc8c2d9 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -4220,7 +4220,19 @@ static float mean_value_half_tan_v2(const struct Float2_Len *d_curr, void interp_weights_poly_v3(float *w, float v[][3], const int n, const float co[3]) { - const float eps = 1e-5f; /* take care, low values cause [#36105] */ + /* Before starting to calculate the weight, we need to figure out the floating point precision we + * can expect from the supplied data. */ + float max_value = 0; + + for (int i = 0; i < n; i++) { + max_value = max_ff(max_value, fabsf(v[i][0] - co[0])); + max_value = max_ff(max_value, fabsf(v[i][1] - co[1])); + max_value = max_ff(max_value, fabsf(v[i][2] - co[2])); + } + + /* These to values we derived by empirically testing different values that works for the test + * files in D7772. */ + const float eps = 16.0f * FLT_EPSILON * max_value; const float eps_sq = eps * eps; const float *v_curr, *v_next; float ht_prev, ht; /* half tangents */ @@ -4293,8 +4305,20 @@ void interp_weights_poly_v3(float *w, float v[][3], const int n, const float co[ void interp_weights_poly_v2(float *w, float v[][2], const int n, const float co[2]) { - const float eps = 1e-5f; /* take care, low values cause [#36105] */ + /* Before starting to calculate the weight, we need to figure out the floating point precision we + * can expect from the supplied data. */ + float max_value = 0; + + for (int i = 0; i < n; i++) { + max_value = max_ff(max_value, fabsf(v[i][0] - co[0])); + max_value = max_ff(max_value, fabsf(v[i][1] - co[1])); + } + + /* These to values we derived by empirically testing different values that works for the test + * files in D7772. */ + const float eps = 16.0f * FLT_EPSILON * max_value; const float eps_sq = eps * eps; + const float *v_curr, *v_next; float ht_prev, ht; /* half tangents */ float totweight = 0.0f; |