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Fix T67389: Transform constraints fail at large distances

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This commit is contained in:
Germano Cavalcante
2019-07-23 14:50:59 +10:00
committed by Campbell Barton
parent 0a0e2dd8a2
commit 6e72d3e00e
3 changed files with 59 additions and 10 deletions
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22
source/blender/editors/transform/transform_constraints.c
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@@ -235,8 +235,7 @@ static void axisProjection(const TransInfo *t,
normalize_v3_v3_length(out, axis, -factor);
}
else {
float v[3], i1[3], i2[3];
float v2[3], v4[3];
float v[3];
float norm_center[3];
float plane[3];
@@ -261,14 +260,17 @@ static void axisProjection(const TransInfo *t,
}
}
else {
add_v3_v3v3(v2, t_con_center, axis);
add_v3_v3v3(v4, v, norm);
isect_line_line_v3(t_con_center, v2, v, v4, i1, i2);
sub_v3_v3v3(v, i2, v);
sub_v3_v3v3(out, i1, t_con_center);
/* Use ray-ray intersection instead of line-line because this gave
* precision issues adding small values to large numbers. */
float mul;
if (isect_ray_ray_v3(v, norm, t_con_center, axis, &mul, NULL)) {
madd_v3_v3v3fl(out, t_con_center, axis, mul);
sub_v3_v3(out, t_con_center);
}
else {
/* In practice this should never fail. */
BLI_assert(0);
}
/* possible some values become nan when
* viewpoint and object are both zero */