Hi Robert,
I tried the sprite solution but I'm experiencing a problem I don't understand.
Basically the first point I add is not automatically shown. Adding a second
point makes both points/sprites to be visible.
Here is the code:
Code:
ControlPoints::ControlPoints()
{
osg::StateSet* stateSet = getOrCreateStateSet();
stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
/// Disable depth test to avoid sort problems and Lighting
stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
/// Setup the point sprites
osg::PointSprite *sprite = new osg::PointSprite();
stateSet->setTextureAttributeAndModes(0, sprite, osg::StateAttribute::ON);
/// Give some size to the points to be able to see the sprite
osg::Point *point = new osg::Point();
point->setSize(40.0f);
stateSet->setAttribute(point);
geometry = new osg::Geometry;
addDrawable(geometry);
osg::Vec4Array* colors = new osg::Vec4Array;
colors->push_back(osg::Vec4(1, 0, 0, 1));
geometry->setColorArray(colors);
geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POINTS, 0,
0));
geometry->setVertexArray(new osg::Vec3Array);
}
void ControlPoints::add(const osg::Vec3& iPoint)
{
osg::DrawArrays* primitiveSet =
static_cast<osg::DrawArrays*>(geometry->getPrimitiveSet(0));
primitiveSet->setCount(primitiveSet->getCount() + 1);
osg::Vec3Array* vertices =
static_cast<osg::Vec3Array*>(geometry->getVertexArray());
vertices->push_back(iPoint);
//geometry->setVertexArray(vertices);
geometry->dirtyDisplayList();
geometry->dirtyBound();
}
Every time I pick with left mouse the add method is called. But the first time
the point is not shown. Any idea?
Cheers,
Gianni[/code]
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http://forum.openscenegraph.org/viewtopic.php?p=61944#61944
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