예제 #1
0
//---------------------------------------------------------------------------------------
void    Portal::Split(Plane& plane, Portal& a, Portal& b)
{
    a.CopyProps(*this);
    b.CopyProps(*this);


    if((_n == plane._n && _c == plane._c) ||
        (_n == -plane._n && _c == -plane._c) )
    {
#ifdef WINDOWS
#   pragma message("see this")
#endif
        a._vxes = _vxes;
        b._vxes = _vxes;
        return;
    }

    v3d_t  iv;
    v3d_t itxB = *_vxes.begin();
    v3d_t itxA = _vxes.back();

    f32_t    fB;
    f32_t	fA = plane.DistTo(itxA);

    FOREACH(vvector<v3d_t>, _vxes, vxI)
    {
        itxB = *vxI;
        fB   = plane.DistTo(itxB);
        if(fB > GEpsilon)
        {
            if(fA < -GEpsilon)
            {
                f32_t   t = -fA /(fB - fA);
                iv.interpolate(itxA,itxB,t);
                a._vxes << iv;
                b._vxes << iv;
            }
            a._vxes<<itxB;
        }
        else if(fB < -GEpsilon)
        {
            if(fA > GEpsilon)
            {
                f32_t t = -fA /(fB - fA);           // t of segment
                iv.interpolate(itxA,itxB,t);
                a._vxes <<iv;
                b._vxes <<iv;
            }
            b._vxes<<itxB;
        }
        else
        {
            a._vxes << itxB;
            b._vxes << itxB;
        }
        itxA = itxB;
        fA   = fB;
    }
예제 #2
0
파일: split.cpp 프로젝트: comarius/getic3d
void    Face::Split(Plane& plane, Face& frontFace, 
					Face& backFace)
{
	Vertex vertex1	= m_points.first();
	Vertex vertex2	= m_points.back();
	float  fB;
	float  fA		= plane.DistTo(vertex2._xyz);
	
	for_each(vertex in m_poins)
	{
		vertex1 = *vertex;
		fB      = plane.DistTo(vertex1._xyz);
		if(fB > EPSILON)
		{
			if(fA < -EPSILON)
			{
				float   t = -fA /(fB - fA);
				Vertex midvertex = vertex1 + 
								   (vertex2-vertex1)*t;
				frontFace << midvertex;
				backFace << midvertex;
			}
			frontFace<<vertex1;
		}
		else if(fB < -EPSILON)
		{
			if(fA > EPSILON)
			{
				float t = -fA /(fB - fA); 
				Vertex midvertex = vertex1 + 
								   (vertex2-vertex1)*t;
				frontFace<<midvertex;
				backFace <<midvertex;
			}
			backFace <<vertex1;
		}
		else
		{
			frontFace << vertex1;
			backFace << vertex1;
		}
		vertex2 = vertex1;
		fA   = fB;
	}