Hi Gianni,
here is working code snippet with the line
*osg::Geometry* createPyramid(const osg::Matrixd& iTransform, const
osg::Vec4& iColor)*
*{*
* osg::Geometry* geom = new osg::Geometry;*
*
*
* osg::Vec3Array* vertices = new osg::Vec3Array(5+2);*
* (*vertices)[0].set(iTransform.preMult(osg::Vec3d(8.0f, 0.0f, 0.0f)));*
* (*vertices)[1].set(iTransform.preMult(osg::Vec3d(0.0f, 8.0f, 0.0f)));*
* (*vertices)[2].set(iTransform.preMult(osg::Vec3d(-8.0f, 0.0f, 0.0f)));*
* (*vertices)[3].set(iTransform.preMult(osg::Vec3d(0.0f, -8.0f, 0.0f)));*
* (*vertices)[4].set(iTransform.preMult(osg::Vec3d(0.0f, 0.0f, 25.0f)));*
*
*
* (*vertices)[5].set(iTransform.preMult(osg::Vec3d(0.0f, 0.0f, 25.0f)));
//4line*
* (*vertices)[6].set(iTransform.preMult(osg::Vec3d(0.0f, 0.0f, -50.0f)));
//4line*
*
*
* osg::UByteArray* indices = new osg::UByteArray(20);*
* (*indices)[0]=0; (*indices)[1]=1; (*indices)[2]=4;*
* (*indices)[3]=1; (*indices)[4]=2; (*indices)[5]=4;*
* (*indices)[6]=2; (*indices)[7]=3; (*indices)[8]=4;*
* (*indices)[9]=3; (*indices)[10]=0; (*indices)[11]=4;*
* (*indices)[12]=1; (*indices)[13]=0; (*indices)[14]=3;*
* (*indices)[15]=2; (*indices)[16]=1; (*indices)[17]=3;*
*
*
* (*indices)[18]=5;*
* (*indices)[19]=6;*
*
*
* geom->setVertexArray(vertices);*
* geom->setVertexIndices(indices);*
*
*
* osg::Vec4Array* colors = new osg::Vec4Array;*
* colors->push_back(iColor);*
* geom->setColorArray(colors);*
* geom->setColorBinding(osg::Geometry::BIND_OVERALL);*
*
*
* geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES,
0, indices->size()-2));*
*
*
* geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,
indices->size()-2, 2)); //4line*
*
*
* return geom;*
*}*
-Nick
On Wed, Jun 23, 2010 at 5:32 PM, Gianni Ambrosio <[email protected]> wrote:
> Hi,
> what's wrong in the following code?
>
>
> Code:
> osg::Geometry* createPyramid(const osg::Matrixd& iTransform, const
> osg::Vec4& iColor)
> {
> osg::Geometry* geom = new osg::Geometry;
>
> osg::Vec3Array* vertices = new osg::Vec3Array(5+2);
> (*vertices)[0].set(iTransform.preMult(osg::Vec3d(8.0f, 0.0f, 0.0f)));
> (*vertices)[1].set(iTransform.preMult(osg::Vec3d(0.0f, 8.0f, 0.0f)));
> (*vertices)[2].set(iTransform.preMult(osg::Vec3d(-8.0f, 0.0f, 0.0f)));
> (*vertices)[3].set(iTransform.preMult(osg::Vec3d(0.0f, -8.0f, 0.0f)));
> (*vertices)[4].set(iTransform.preMult(osg::Vec3d(0.0f, 0.0f, 25.0f)));
>
> (*vertices)[5].set(iTransform.preMult(osg::Vec3d(0.0f, 0.0f, 25.0f)));
> //4line
> (*vertices)[6].set(iTransform.preMult(osg::Vec3d(0.0f, 0.0f, -50.0f)));
> //4line
>
> osg::UByteArray* indices = new osg::UByteArray(18);
> (*indices)[0]=0; (*indices)[1]=1; (*indices)[2]=4;
> (*indices)[3]=1; (*indices)[4]=2; (*indices)[5]=4;
> (*indices)[6]=2; (*indices)[7]=3; (*indices)[8]=4;
> (*indices)[9]=3; (*indices)[10]=0; (*indices)[11]=4;
> (*indices)[12]=1; (*indices)[13]=0; (*indices)[14]=3;
> (*indices)[15]=2; (*indices)[16]=1; (*indices)[17]=3;
>
> geom->setVertexArray(vertices);
> geom->setVertexIndices(indices);
>
> osg::Vec4Array* colors = new osg::Vec4Array;
> colors->push_back(iColor);
> geom->setColorArray(colors);
> geom->setColorBinding(osg::Geometry::BIND_OVERALL);
>
> geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES,
> 0, indices->size()));
>
> geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES, 5,
> 2)); //4line
>
> return geom;
> }
>
>
>
> I added the three "//4line" lines of code to explain my problem. In this
> case I would add a line starting from the top of the pyramid downwards but I
> just see the pyramid instead.
>
> Regards
> Gianni
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=29322#29322
>
>
>
>
>
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