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EdgeSlide: fix divide by zero

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This commit is contained in:
Campbell Barton 2015-05-07 19:50:46 +10:00
parent 9ca2b76a9f
commit cb7fdf45cd
1 changed files with 18 additions and 7 deletions
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25
source/blender/editors/transform/transform.c
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@ -5460,7 +5460,7 @@ static BMEdge *get_other_edge(BMVert *v, BMEdge *e)
}
/* interpoaltes along a line made up of 2 segments (used for edge slide) */
static void interp_line_v3_v3v3v3(float p[3], const float v1[3], const float v2[3], const float v3[3], const float t)
static void interp_line_v3_v3v3v3(float p[3], const float v1[3], const float v2[3], const float v3[3], float t)
{
float t_mid, t_delta;
@ -5468,17 +5468,28 @@ static void interp_line_v3_v3v3v3(float p[3], const float v1[3], const float v2[
t_mid = line_point_factor_v3(v2, v1, v3);
t_delta = t - t_mid;
if (fabsf(t_delta) < FLT_EPSILON) {
copy_v3_v3(p, v2);
}
else if (t_delta < 0.0f) {
interp_v3_v3v3(p, v1, v2, t / t_mid);
if (t_delta < 0.0f) {
if (UNLIKELY(fabsf(t_mid) < FLT_EPSILON)) {
copy_v3_v3(p, v2);
}
else {
interp_v3_v3v3(p, v1, v2, t / t_mid);
}
}
else {
interp_v3_v3v3(p, v2, v3, (t - t_mid) / (1.0f - t_mid));
t = t - t_mid;
t_mid = 1.0f - t_mid;
if (UNLIKELY(fabsf(t_mid) < FLT_EPSILON)) {
copy_v3_v3(p, v3);
}
else {
interp_v3_v3v3(p, v2, v3, t / t_mid);
}
}
}
static void len_v3_ensure(float v[3], const float length)
{
normalize_v3(v);