Exemplo n.º 1
0
OSG_BASE_DLLMAPPING 
void extend(SphereVolume &srcVol, const CylinderVolume &vol)
{
    Pnt3f   min, max, min1, max1, min2, max2, c;
    Real32  r;

    if((!srcVol.isValid   () && !srcVol.isEmpty()) ||
         srcVol.isInfinite()                       ||
         srcVol.isStatic  ()                         )
    {
        return;
    }

    if(!vol.isValid())
        return;

    if(srcVol.isEmpty())
    {
        if(vol.isEmpty())
        {
            return;
        }
        else
        {
            vol.getBounds(min, max);
            vol.getCenter(c);

            r = (min - c).length();

            srcVol.setValue(c, r);

            return;
        }
    }
    else if(vol.isEmpty())
    {
        return;
    }

    srcVol.getBounds(min,  max);
    vol   .getBounds(min1, max1);

    min2 = Pnt3f(osgMin(min.x(), min1.x()), 
                 osgMin(min.y(), min1.y()),
                 osgMin(min.z(), min1.z()));

    max2 = Pnt3f(osgMax(max.x(), max1.x()), 
                 osgMax(max.y(), max1.y()),
                 osgMax(max.z(), max1.z()));

    c = Pnt3f((min2.x() + max2.x()) * 0.5f, 
              (min2.y() + max2.y()) * 0.5f,
              (min2.z() + max2.z()) * 0.5f);

    r = ((max2 - min2).length()) * 0.5f;

    srcVol.setValue(c, r);

    return;
}
Exemplo n.º 2
0
OSG_BASE_DLLMAPPING 
void extend(CylinderVolume &srcVol, const CylinderVolume &vol)
{
    Pnt3f  min, max, min1, max1, min2, max2, apos;
    Vec2f  p;
    Vec3f  adir;
    Real32 r;

    if((!srcVol.isValid   () && !srcVol.isEmpty()) ||
         srcVol.isInfinite()                       ||
         srcVol.isStatic  ()                         )
    {
        return;
    }

    if(!vol.isValid())
        return;

    if(srcVol.isEmpty())
    {
        if(vol.isEmpty())
        {
            return;
        }
        else
        {
            srcVol = vol;
            return;
        }
    }
    else if(vol.isEmpty())
    {
        return;
    }

    srcVol.getBounds(min,  max);
    vol   .getBounds(min1, max1);

    min2 = Pnt3f(osgMin(min.x(), min1.x()), 
                 osgMin(min.y(), min1.y()),
                 osgMin(min.z(), min1.z()));
    max2 = Pnt3f(osgMax(max.x(), max1.x()), 
                 osgMax(max.y(), max1.y()),
                 osgMax(max.z(), max1.z()));

    p = Vec2f(max2.x() - min2.x(), max2.y() - min2.y());
    r = (p.length()) * 0.5f;

    adir = Vec3f(0.f, 0.f, max2.z() - min2.z());
    apos = Pnt3f(p.x(), p.y(), min2.z());

    srcVol.setValue(apos, adir, r);

    return;
}
Exemplo n.º 3
0
OSG_BASE_DLLMAPPING 
void extend(BoxVolume &srcVol, const CylinderVolume &vol)
{
    Pnt3f min, max;

    if((!srcVol.isValid   () && !srcVol.isEmpty()) ||
         srcVol.isInfinite()                       ||
         srcVol.isStatic  ()                         )
    {
        return;
    }

    if(!vol.isValid())
        return;

    if(srcVol.isEmpty())
    {
        if(vol.isEmpty())
        {
            return;
        }
        else
        {
            vol   .getBounds(min, max);
            srcVol.setBounds(min, max);

            return;
        }
    }
    else if(vol.isEmpty())
    {
        return;
    }

    vol.getBounds(min, max);

    srcVol.setBounds(osgMin(min.x(), srcVol.getMin().x()),
                     osgMin(min.y(), srcVol.getMin().y()),
                     osgMin(min.z(), srcVol.getMin().z()),
                     osgMax(max.x(), srcVol.getMax().x()),
                     osgMax(max.y(), srcVol.getMax().y()),
                     osgMax(max.z(), srcVol.getMax().z()));

    if(vol.isInfinite())
        srcVol.setInfinite(true);

    return;
}
Exemplo n.º 4
0
OSG_BASE_DLLMAPPING 
bool intersect(const SphereVolume &sphere, const CylinderVolume &cylinder)
{
    bool  retCode;
    Pnt3f apos;
    Vec3f adir;

    cylinder.getAxis(apos, adir);

    if(sphere.isEmpty() || cylinder.isEmpty())
    {
        retCode = false;
    }
    else if(sphere.isInfinite() || cylinder.isInfinite())
    {
        retCode = true;
    }
    else
    {
        Real32  d = 0.f, s1 = 0.f, s2 = 0.f;
        Pnt3f   c;
        Vec3f   u, u1, u2;

        //get the distance between the upper and lower point of the cylinder
        // and the sphere center

        s1 = (apos        - sphere.getCenter()).length();
        s2 = (apos + adir - sphere.getCenter()).length();

        if ((s1<=DBL_EPSILON) || (s2<=DBL_EPSILON)) 
            return true;
        
        //check the smallest distance and set the vector coordinate
        if(s1 <= s2)
        {
            d = s1;
            c = apos;
        }
        else
        {
            d = s2;
            c = apos + adir;
        }

        // decompose the vector in u1 and u2 which are parallel and 
        // perpendicular to the cylinder axis respectively

        u  = ((d - sphere.getRadius()) / d) * (c - sphere.getCenter());

        u1 = (u[0] * adir[0] + u[1] * adir[1] + u[2] * adir[2]) / 
             (adir.length() * adir.length()) * adir;
        u2 = u - u1;

        if(u2.length() <= 10e-6)
        {
            retCode = (d <= sphere.getRadius());
        }
        else
        {
            retCode = (u2.length() <= cylinder.getRadius());
        }
    }

    return retCode;
}
Exemplo n.º 5
0
OSG_BASE_DLLMAPPING 
bool intersect(const BoxVolume &box, const CylinderVolume &cylinder)
{
    bool  retCode;
    Pnt3f apos;
    Vec3f adir;

    cylinder.getAxis(apos, adir);

    if(box.isEmpty() == true || cylinder.isEmpty() == true)
    {
        retCode = false;
    }
    else if(box.isInfinite() == true || cylinder.isInfinite() == true)
    {
        retCode = true;
    }
    else
    {
        Real32  s1 = 0, s2 = 0, s3 = 0, s4 = 0, d = 0, d1 = 0, d2 = 0;
        Pnt3f   c, p, p1, p2;
        Vec3f   u, u1, u2;

        // find the distance between the min and the max of the box
        //with the lower point and the upper point of the cylinder respectively

        s1 = (apos - box.getMin()).length();
        s2 = (apos - box.getMax()).length();

        s3 = (apos + adir - box.getMin()).length();
        s4 = (apos + adir - box.getMax()).length();

        //Check the minimum of the above distances

        if(s1 <= s2)
        {
            d1 = s1;
            p1 = box.getMin();
        }
        else
        {
            d1 = s2;
            p1 = box.getMax();
        }

        if(s3 <= s4)
        {
            d2 = s3;
            p2 = box.getMin();
        }
        else
        {
            d2 = s4;
            p2 = box.getMax();
        }

        //set the value of the vector corresponding to the shortest distance
        if(d1 <= d2)
        {
            d = d1;
            c = apos;
            p = p1;
        }
        else
        {
            d = d2;
            c = apos + adir;
            p = p2;
        }

        // decompose the vector in u1 and u2 which are parallel and 
        // perpendicular to the cylinder axis respectively
        u  = p - c;
        u1 = (u[0] * adir[0] + u[1] * adir[1] + u[2] * adir[2]) /
            (adir.length() * adir.length()) * adir;

        u2 = u - u1;

        if(u1.length() <= 10e-6)
        {
            retCode = true;
        }
        else if(u2.length() <= 10e-6)
        {
            retCode = (d <= 10e-6);
        }
        else
        {
            retCode = (u2.length() <= cylinder.getRadius());
        }
    }

    return retCode;
}