public Geom3DLine(Geom3DVector pt, Geom3DVector v, bool isDir)
{
point = new Geom3DVector(pt);
if (isDir)
{
dir = new Geom3DVector(v);
}
else
{
dir = v.sub(pt);
}
}
//<Carson(Taipei)><01-31-2019><Modified>
/// <summary>
/// Inersection of plane with line
/// </summary>
/// <param name="line"></param>
/// <param name="inter"></param>
/// <returns>true if intersection exists</returns>
public bool intersectLine(Geom3DLine line, Geom3DVector inter)
{
float q = normal.x * (origin.x - line.point.x) + normal.y * (origin.y - line.point.y) + normal.z * (origin.z - line.point.z);
float d = normal.x * line.dir.x + normal.y * line.dir.y + normal.z * line.dir.z;
if (d == 0)
{
inter.x = inter.y = inter.z = 0;
return(false);
}
float r = q / d;
if (r < 0)
{
return(false);
}
inter.x = line.point.x + r * line.dir.x;
inter.y = line.point.y + r * line.dir.y;
inter.z = line.point.z + r * line.dir.z;
return(true);
}
public Geom3DPlane(Geom3DVector o, Geom3DVector norm)
{
origin = new Geom3DVector(o);
normal = new Geom3DVector(norm);
}
public float dot(Geom3DVector v)
{
return(x * v.x + y * v.y + z * v.z);
}
public Geom3DVector sub(Geom3DVector v)
{
return(new Geom3DVector(x - v.x, y - v.y, z - v.z));
}
public Geom3DVector add(Geom3DVector v)
{
return(new Geom3DVector(x + v.x, y + v.y, z + v.z));
}
public Geom3DVector(Geom3DVector v)
{
x = v.x;
y = v.y;
z = v.z;
}