Increased the gimbal lock threshold to 170 degrees from 150 degrees.
This makes it possible to look at the bottom of an object.
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1 changed files with 5 additions and 2 deletions
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@ -82,6 +82,9 @@ use constant VIEW_BOTTOM => [0.0,180.0];
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use constant VIEW_FRONT => [0.0,90.0];
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use constant VIEW_REAR => [180.0,90.0];
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#use constant GIMBALL_LOCK_THETA_MAX => 150;
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use constant GIMBALL_LOCK_THETA_MAX => 170;
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# make OpenGL::Array thread-safe
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{
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no warnings 'redefine';
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@ -254,7 +257,7 @@ sub mouse_event {
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if (TURNTABLE_MODE) {
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$self->_sphi($self->_sphi + ($pos->x - $orig->x) * TRACKBALLSIZE);
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$self->_stheta($self->_stheta - ($pos->y - $orig->y) * TRACKBALLSIZE); #-
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$self->_stheta(150) if $self->_stheta > 150;
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$self->_stheta(GIMBALL_LOCK_THETA_MAX) if $self->_stheta > GIMBALL_LOCK_THETA_MAX;
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$self->_stheta(0) if $self->_stheta < 0;
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} else {
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my $size = $self->GetClientSize;
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@ -359,7 +362,7 @@ sub select_view {
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$self->_sphi($dirvec->[0]);
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$self->_stheta($dirvec->[1]);
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# Avoid gimball lock.
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$self->_stheta(150) if $self->_stheta > 150;
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$self->_stheta(GIMBALL_LOCK_THETA_MAX) if $self->_stheta > GIMBALL_LOCK_THETA_MAX;
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$self->_stheta(0) if $self->_stheta < 0;
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# View everything.
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$self->zoom_to_bounding_box($bb);
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