I have noticed that the vertices x, y, z
from a model come to the TriangleFunctor as x, z, -y. This is probably
normal as OSG is Z pos up…
This is a great system; thanks Robert!
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Robert Osfield
Sent: Wednesday, August 30, 2006
4:37 AM
To: osg users
Subject: Re: [osg-users]
Collecting vertex array... is this correct?
Hi Mustafa,
The role of the osg::TriangleFunctor is to decomposs all GL_POLYGON, GL_QUADS,
GL_TRIANGLE_FAN, GL_TRIANGLE_STRIP e etc into straight triangles. This is
what makes the TriangleFunctor and TriangleIndexFunctor much easier to use for
polygon querry type work.
Robert.
On 8/30/06, Mustafa
<[EMAIL PROTECTED]> wrote:
If the Geometry is a colletion of TriangleFan or GL_POLYGONS etc...
will this function again generate a distinct triangles from this
QUADS, POLYGONS and TRIANGLEFANs etc ?
2006/8/30, Don Burns <
[EMAIL PROTECTED]>:
> Hi Jeff,
>
> An improvement would be to use a osg::Vec3Array instead of a
> std::vector<float> m_VertexList. An osg::Vec3Array is, in
essence, an
> std::vector<osg::Vec3> ... . This keeps your triples
together.
>
> -don
>
>
> On 8/29/06, Jeff Kershner <[EMAIL PROTECTED]>
wrote:
> >
> >
> >
> >
> >
> >
> > I am using the TriangleFunctor like Robert suggested to get triangle
> information. What I need is a vertex buffer that I can give to
the physics
> objects. Something is not working between OSG and ODE and I am
not sure if
> I am not getting the triangles correctly.
> >
> >
> >
> > This is what I do:
> >
> >
> >
> > struct Triangle
> >
> > {
> >
>
>
void operator() (const osg::Vec3& v1, const osg::Vec3& v2,
> const osg::Vec3& v3, bool)
> >
>
> {
> >
>
>
m_VertexList.push_back(v1[0]);
> >
>
>
m_VertexList.push_back(v1[1]);
> >
>
>
m_VertexList.push_back(v1[2]);
> >
> >
> >
>
>
m_VertexList.push_back(v2[0]);
> >
>
>
m_VertexList.push_back(v2[1]);
> >
>
>
m_VertexList.push_back(v2[2]);
> >
> >
> >
>
>
m_VertexList.push_back(v3[0]);
> >
>
>
m_VertexList.push_back(v3[1]);
> >
>
>
m_VertexList.push_back(v3[2]);
> >
>
> }
> >
> >
> >
> > std::vector<float> m_VertexList;
> >
> > };
> >
> >
> >
> > …
> >
> > osg::TriangleFunctor<Triangle> tf;
> >
> > pGeometry->accept(tf);
> >
> >
> >
> > So after this m_VertexList should be a list of all the
vertices… correct?
> >
> >
> >
> > Then to create a vertex array I am doing the following:
> >
> >
> >
> > float* pVertexArray = new float[tf.m_VertexList.size()];
> >
> > int c = 0;
> >
> > for (vector<float>::iterator it = tf.m_VertexList.begin (); it
!=
> tf.VertexList.end(); it++)
> >
>
>
pVertexBuffer[c++] = *it;
> >
> >
> >
> > Is this a correct to create a Vertex Array?
> >
> > /jk
> >
> > _______________________________________________
> > osg-users mailing list
> > [email protected]
> > http://openscenegraph.net/mailman/listinfo/osg-users
> > http://www.openscenegraph.org/
> >
> >
>
>
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://openscenegraph.net/mailman/listinfo/osg-users
> http://www.openscenegraph.org/
>
>
_______________________________________________
osg-users mailing list
[email protected]
http://openscenegraph.net/mailman/listinfo/osg-users
http://www.openscenegraph.org/
