<div class="gmail_quote">2010/11/29 Xiaopeng Yang <span dir="ltr"><<a href="mailto:yxp233@postech.ac.kr">yxp233@postech.ac.kr</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div></div><div class="h5">Please help me. I really need your help!</div></div><div class="h5"><br></div></blockquote><div class="gmail_quote"><br></div>I think screen coordinates will always have a z coordinate value of 0. Try getting the picked point in world coordinates. This is probably what you want anyway, right? If you get the picked point in screen coordinates, if you translate the object and then pick the "same" point, you will get a different value. I doubt this is what you want.</div>
<div class="gmail_quote"><br><div>David </div></div>