Hi,
I can't see anything obviously wrong, can you make a small example that
breaks?
jp
On 02/06/11 13:28, Sergey Alekseev wrote:
Hi,
I haven't got an answer to my question in topic "best way to draw a tube", so I
try to make new thread.
I'm drawing top and bottom rings of tube as polygons. I calcucate vertices of
polygons according to outer radius of the tube and thickness of it's wall. I'm
using DrawElementsUShort for specification of order of the vertices.
But the code below gives an memory access violation error.
10 osg::Geometry * polyGeom = new osg::Geometry ();
11 polyGeom -> setVertexArray (vertices);
12 osg::DrawElementsUShort * elements = new
оsg::DrawElementsUShort(osg::PrimitiveSet::QUAD_STRIP);
13 //elements ->reserve (40);
14 for ( unsigned int i = 0; i< 40; i ++ )
15 elements -> push_back (i);
16 //elements [i] = i;
17 polyGeom -> setNormalBinding (osg::Geometry::BIND_OVERALL);
18 polyGeom -> addPrimitiveSet (elements);
19 item -> addDrawable (polyGeom);
This error appears at 2nd iteration of cycle in string 15. This result appears
in standard example provided with library, too.
The size of vector elements already after inizialization is really huge, it's
clearing or size change gives nothing.
Tell me please, where I'm wrong.
If I use DrawArray instead of DrawElementsUShort, the central part (inner
diameter of a tube) paints with color - the circle's half is drawing instead of
ring's half.
Thanks.
Cheers,
Sergey
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=40033#40033
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