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Transform Constraints: When axis is quasi perpendicular to the screen (within 5 degrees), it uses vertical motion of the mouse instead of normal axis projection. This behavior isn't new, but the 5 degrees limit is (it's also the limit at which manipulator axis disappear), it used to be much lower than that making small angles hard to manage.

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This commit is contained in:
Martin Poirier
2010-01-15 00:35:21 +00:00
parent 4770cc031d
commit 01236d49f9
1 changed files with 10 additions and 2 deletions
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12
source/blender/editors/transform/transform_constraints.c
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@@ -198,15 +198,23 @@ static void postConstraintChecks(TransInfo *t, float vec[3], float pvec[3]) {
}
static void axisProjection(TransInfo *t, float axis[3], float in[3], float out[3]) {
float norm[3], vec[3], factor;
float norm[3], vec[3], factor, angle;
if(in[0]==0.0f && in[1]==0.0f && in[2]==0.0f)
return;
print_v3("viewinv[2]", t->viewinv[2]);
angle = fabs(angle_v3v3(axis, t->viewinv[2]));
if (angle > M_PI / 2) {
angle = M_PI - angle;
}
angle = 180.0f * angle / M_PI;
/* For when view is parallel to constraint... will cause NaNs otherwise
So we take vertical motion in 3D space and apply it to the
constraint axis. Nice for camera grab + MMB */
if(1.0f - fabs(dot_v3v3(axis, t->viewinv[2])) < 0.000001f) {
if(angle < 5.0f) {
project_v3_v3v3(vec, in, t->viewinv[1]);
factor = dot_v3v3(t->viewinv[1], vec) * 2.0f;
/* since camera distance is quite relative, use quadratic relationship. holding shift can compensate */