<div id="RTEContent"><br> Hello again users,<br> <br> As I explained yesterday (below) I am having some problems defining a plane sources location. Should/would the following work? (note Vec3f is a vector class that supports the standard operators, ie +, *, etc...)<br> <br> Vec3f pn(-1., 0., 1.); // normal not used<br> Vec3f pp(3., .0, -3.); // origin<br> //Vec3f pp(0., .0, 0.); // origin<br> Vec3f pu(-1.,0., -1.); // point 1 on plane, local to 0<br> Vec3f pv(0.,1.,0.); // point 2 on plane.<br> float lu = 200, lv = 150;<br> <br> Vec3f p1(pp + (lu/2.)*pu); <br> Vec3f p2(pp + (lv/2.)*pv);<br> <br> plane->SetOrigin(pp[0], pp[1], pp[2]);<br> plane->SetPoint1(pu[0], pu[1], pu[2]);<br> plane->SetPoint2(pv[0], pv[1], pv[2]);<br> <br> This works fine with the origin is 0, 0, 0 <br> But not when I change the origin to something else the plane
is skewed. I would think that point 1 and 2 would be defined such that (p1-origin) x (p2-origin) would produce the palnes normal... that probably is the case I imagine, what am I doing wrong?<br><br> Thanks for your time.<br> -tim<br> <br>Note: forwarded message attached.</div><p>
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