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Added setPosition and setWidth methods into ScalarBar and changed the

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implementation to use these values to position and set the size of the
scalar bar.  Also made the characterSize value a float rather than
the previous int.
This commit is contained in:
Robert Osfield
2004-06-02 12:37:14 +00:00
parent 673244a60c
commit 7f94839e94
3 changed files with 73 additions and 117 deletions
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145
src/osgSim/ScalarBar.cpp
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@@ -56,6 +56,18 @@ std::string ScalarBar::getTitle() const
return _title;
}
void ScalarBar::setPosition(const osg::Vec3& pos)
{
_position = pos;
createDrawables();
}
void ScalarBar::setWidth(float width)
{
_width = width;
createDrawables();
}
void ScalarBar::setOrientation(ScalarBar::Orientation orientation)
{
_orientation = orientation;
@@ -101,43 +113,21 @@ const ScalarBar::TextProperties& ScalarBar::getTextProperties() const
return _textProperties;
}
namespace
{
struct MaxCoordLess
{
enum Axis{X_AXIS, Y_AXIS, Z_AXIS};
Axis _axis;
MaxCoordLess(Axis axis): _axis(axis) {}
bool operator()(const osgText::Text* d1, const osgText::Text* d2)
{
if(_axis == X_AXIS ) return d1->getBound().xMax() < d2->getBound().xMax();
else if(_axis == Y_AXIS) return d1->getBound().yMax() < d2->getBound().yMax();
else if(_axis == Z_AXIS) return d1->getBound().zMax() < d2->getBound().zMax();
return false;
}
};
struct AlignCentreOnYValue
{
float _y;
AlignCentreOnYValue(float y): _y(y) {}
void operator()(osgText::Text* t)
{
t->setPosition(osg::Vec3(t->getBound().center().x(), _y, t->getBound().center().z()));
t->setAlignment(osgText::Text::CENTER_CENTER);
}
};
}
void ScalarBar::createDrawables()
{
// Remove any existing Drawables
_drawables.erase(_drawables.begin(), _drawables.end());
osg::Matrix matrix;
if(_orientation==HORIZONTAL)
{
matrix = osg::Matrix::translate(_position);
}
else
{
matrix = osg::Matrix::rotate(osg::DegreesToRadians(90.0f),1.0f,0.0f,0.0f) * osg::Matrix::translate(_position);
}
// 1. First the bar
// =================
@@ -152,34 +142,16 @@ void ScalarBar::createDrawables()
vs->reserve(2*(_numColors+1));
float incr = (_stc->getMax() - _stc->getMin()) / _numColors;
float arOffset;
if(_orientation==HORIZONTAL)
{
arOffset = _numColors * incr * _aspectRatio; // Bar height for a horizontal bar
}
else
{
arOffset = (_numColors*incr)/_aspectRatio; // Bar width for a vertical bar
}
float xincr = (_width) / _numColors;
float arOffset = _width * _aspectRatio;
int i;
for(i=1; i<=_numColors; ++i)
{
// Make a quad
if(_orientation==HORIZONTAL)
{
vs->push_back(osg::Vec3(_stc->getMin() + (i-1) * incr, 0.0f, 0.0f));
vs->push_back(osg::Vec3(_stc->getMin() + (i-1) * incr, arOffset, 0.0f));
vs->push_back(osg::Vec3(_stc->getMin() + i * incr, arOffset, 0.0f));
vs->push_back(osg::Vec3(_stc->getMin() + i * incr, 0.0f, 0.0f));
}
else
{
vs->push_back(osg::Vec3(0.0f, _stc->getMin() + (i-1) * incr, 0.0f));
vs->push_back(osg::Vec3(arOffset, _stc->getMin() + (i-1) * incr, 0.0f));
vs->push_back(osg::Vec3(arOffset, _stc->getMin() + i * incr, 0.0f));
vs->push_back(osg::Vec3(0.0f, _stc->getMin() + i * incr, 0.0f));
}
vs->push_back(osg::Vec3((i-1) * xincr, 0.0f, 0.0f)*matrix);
vs->push_back(osg::Vec3((i-1) * xincr, arOffset, 0.0f)*matrix);
vs->push_back(osg::Vec3(i * xincr, arOffset, 0.0f)*matrix);
vs->push_back(osg::Vec3(i * xincr, 0.0f, 0.0f)*matrix);
}
bar->setVertexArray(vs.get());
@@ -198,7 +170,7 @@ void ScalarBar::createDrawables()
// Normal
osg::ref_ptr<osg::Vec3Array> ns(new osg::Vec3Array);
ns->push_back(osg::Vec3(0.0f,0.0f,1.0f));
ns->push_back(osg::Matrix::transform3x3(osg::Vec3(0.0f,0.0f,1.0f),matrix));
bar->setNormalArray(ns.get());
bar->setNormalBinding(osg::Geometry::BIND_OVERALL);
@@ -212,12 +184,13 @@ void ScalarBar::createDrawables()
// Check the character size, if it's 0, estimate a good character size
float characterSize = _textProperties._characterSize;
if(characterSize == 0) characterSize = ((_stc->getMax()-_stc->getMin())*0.3)/_numLabels;
if(characterSize == 0) characterSize = _width * 0.03f;
osgText::Font* font = osgText::readFontFile(_textProperties._fontFile.c_str());
std::vector<osgText::Text*> texts(_numLabels); // We'll need to collect pointers to these for later
float labelIncr = (_stc->getMax()-_stc->getMin())/(_numLabels-1);
float labelxIncr = (_width)/(_numLabels-1);
for(i=0; i<_numLabels; ++i)
{
osgText::Text* text = new osgText::Text;
@@ -227,29 +200,15 @@ void ScalarBar::createDrawables()
text->setCharacterSize(characterSize);
text->setText(_sp->printScalar(_stc->getMin()+(i*labelIncr)));
if(_orientation == HORIZONTAL)
{
text->setPosition(osg::Vec3(_stc->getMin() + (i*labelIncr), arOffset, 0.0f));
text->setAlignment(osgText::Text::CENTER_BOTTOM);
}
else
{
text->setPosition(osg::Vec3(arOffset, _stc->getMin() + (i*labelIncr), 0.0f));
text->setAlignment(osgText::Text::LEFT_CENTER);
}
text->setPosition(osg::Vec3((i*labelxIncr), arOffset, 0.0f)*matrix);
text->setAlignment(osgText::Text::CENTER_BASE_LINE);
text->setAxisAlignment( (_orientation==HORIZONTAL) ? osgText::Text::XY_PLANE : osgText::Text::XZ_PLANE );
addDrawable(text);
texts[i] = text;
}
// Make sure the text labels are all properly aligned - different words will have a different
// vertical alignment depending on the letters used in the labels. E.g. a 'y' has a dangling tail.
if(_orientation == HORIZONTAL)
{
std::vector<osgText::Text*>::iterator maxYIt = std::max_element(texts.begin(), texts.end(), MaxCoordLess(MaxCoordLess::Y_AXIS));
std::for_each(texts.begin(), texts.end(), AlignCentreOnYValue((*maxYIt)->getBound().center().y()));
}
// 3. And finally the title
// ========================
@@ -263,38 +222,12 @@ void ScalarBar::createDrawables()
text->setCharacterSize(characterSize);
text->setText(_title);
if(_orientation==HORIZONTAL)
{
// Horizontal bars have the title above the scalar bar and the labels.
// Need to move the title above any labels, using maximum y value of the
// existing text objects
float titleY = (_numLabels>0) ? arOffset + characterSize : arOffset;
std::vector<osgText::Text*>::iterator maxYIt = std::max_element(texts.begin(), texts.end(), MaxCoordLess(MaxCoordLess::Y_AXIS));
float titleY;
if(maxYIt != texts.end()) titleY = (*maxYIt)->getBound().yMax() * 1.1f;
else titleY = arOffset; // No labels, so just use arOffset
// Position the title at the middle of the bar above any labels.
text->setPosition(osg::Vec3(_stc->getMin() + ((_stc->getMax()-_stc->getMin())/2.0f), titleY, 0.0f));
text->setAlignment(osgText::Text::CENTER_BOTTOM);
}
else if(_orientation==VERTICAL)
{
// Vertical bars have the title to the right of the scalar bar and the labels.
// Need to move the title out beyond any labels, using the maximum x value of the
// existing text objects
std::vector<osgText::Text*>::iterator maxXIt = std::max_element(texts.begin(), texts.end(), MaxCoordLess(MaxCoordLess::X_AXIS));
float titleX;
if(maxXIt != texts.end()) titleX = (*maxXIt)->getBound().xMax() * 1.1f;
else titleX = arOffset; // No labels, so just use arOffset
// Position the title in the at the middle of the bar, to the right of any labels.
text->setPosition(osg::Vec3(titleX, _stc->getMin() + ((_stc->getMax()-_stc->getMin())/2.0f), 0.0f));
text->setAlignment(osgText::Text::LEFT_CENTER);
}
// Position the title at the middle of the bar above any labels.
text->setPosition(osg::Vec3((_width/2.0f), titleY, 0.0f)*matrix);
text->setAlignment(osgText::Text::CENTER_BASE_LINE);
text->setAxisAlignment( (_orientation==HORIZONTAL) ? osgText::Text::XY_PLANE : osgText::Text::XZ_PLANE );
addDrawable(text);
}