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Add and document a "range" (level-of-detail) animation for individual

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objects and a range for the model as a whole.
This commit is contained in:
david 2002-04-13 12:10:20 +00:00
parent fa5a707128
commit 6b71800829
2 changed files with 60 additions and 2 deletions
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47
src/Model/model.cxx
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@ -193,9 +193,18 @@ FG3DModel::init (const string &path)
}
}
// Set up the range selector node
float ranges[2];
ssgRangeSelector * lod = new ssgRangeSelector;
lod->addKid(_model);
ranges[0] = props.getFloatValue("range/min-m", 0);
ranges[1] = props.getFloatValue("range/max-m", 5000);
lod->setRanges(ranges, 2);
// Set up the alignment node
ssgTransform * align = new ssgTransform;
align->addKid(_model);
align->addKid(lod);
sgMat4 rot_matrix;
sgMat4 off_matrix;
sgMat4 res_matrix;
@ -217,7 +226,6 @@ FG3DModel::init (const string &path)
_selector->addKid(_position);
_selector->clrTraversalMaskBits(SSGTRAV_HOT);
// Set up a location class
_location = (FGLocation *) new FGLocation;
@ -318,6 +326,8 @@ FG3DModel::make_animation (const char * object_name,
const char * type = node->getStringValue("type");
if (!strcmp("none", type)) {
animation = new NullAnimation();
} else if (!strcmp("range", type)) {
animation = new RangeAnimation();
} else if (!strcmp("select", type)) {
animation = new SelectAnimation();
} else if (!strcmp("spin", type)) {
@ -387,6 +397,39 @@ FG3DModel::NullAnimation::update (int dt)
}
////////////////////////////////////////////////////////////////////////
// Implementation of FG3DModel::RangeAnimation
////////////////////////////////////////////////////////////////////////
FG3DModel::RangeAnimation::RangeAnimation ()
: _branch(new ssgRangeSelector)
{
}
FG3DModel::RangeAnimation::~RangeAnimation ()
{
_branch = 0;
}
void
FG3DModel::RangeAnimation::init (ssgEntity * object,
SGPropertyNode * props)
{
float ranges[2];
splice_branch(_branch, object);
_branch->setName(props->getStringValue("name", 0));
ranges[0] = props->getFloatValue("min-m", 0);
ranges[1] = props->getFloatValue("max-m", 5000);
_branch->setRanges(ranges, 2);
}
void
FG3DModel::RangeAnimation::update (int dt)
{
}
////////////////////////////////////////////////////////////////////////
// Implementation of FG3DModel::SelectAnimation

15
src/Model/model.hxx
View file

@ -139,6 +139,21 @@ private:
ssgBranch * _branch;
};
/**
* A range, or level-of-detail (LOD) animation.
*/
class RangeAnimation : public Animation
{
public:
RangeAnimation ();
virtual ~RangeAnimation ();
virtual void init (ssgEntity * object, SGPropertyNode * props);
virtual void update (int dt);
private:
ssgRangeSelector * _branch;
};
/**
* Animation to select alternative versions of the same object.