https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210457#M15811 David, try:<BR /> <PRE>IF heel_height - bottom_cord_height - plumb_cut_topcord &lt; 0.0001 THEN...</PRE> A better option, especially if you're going to test this condition multiple times, would be:<BR /> <BR /> <B>Master Script:</B><PRE>EPS = 0.0001</PRE> <B>2D/3D scripts:</B><PRE>IF heel_height - bottom_cord_height - plumb_cut_topcord &lt; EPS THEN...</PRE> Tue, 06 Dec 2011 02:38:30 GMT vistasp 2011-12-06T02:38:30Z https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210456#M15810 <DIV class="actalk-migrated-content"><T>I am writing a script for a roof truss. I have to test for three conditions at the heel. For one of the conditions I am testing for zero ie IF heel_height - bottom_cord_height - plumb_cut_topcord = 0 THEN............ but i keep getting a warning "use of real types can result in precision problems"<BR /> <BR /> Is there a way to get around this warning? Is testing for zero what causes it?<BR /> <BR /> Thanks in advance<BR /> <BR /> David</T></DIV> Mon, 05 Dec 2011 22:47:50 GMT https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210456#M15810 Dave Seabury 2011-12-05T22:47:50Z https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210457#M15811 David, try:<BR /> <PRE>IF heel_height - bottom_cord_height - plumb_cut_topcord &lt; 0.0001 THEN...</PRE> A better option, especially if you're going to test this condition multiple times, would be:<BR /> <BR /> <B>Master Script:</B><PRE>EPS = 0.0001</PRE> <B>2D/3D scripts:</B><PRE>IF heel_height - bottom_cord_height - plumb_cut_topcord &lt; EPS THEN...</PRE> Tue, 06 Dec 2011 02:38:30 GMT https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210457#M15811 vistasp 2011-12-06T02:38:30Z https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210458#M15812 You might want to make this ... <FONT color="#ff0000">IF ABS(heel_height - bottom_cord_height - plumb_cut_topcord) &lt; 0.0001 THEN</FONT>...<BR /> <BR /> Just in case you do have the situation where you might have a negative value.<BR /> Otherwise any negative value will be less than the tollerence and will trigger the condition.<BR /> <BR /> Barry. Tue, 06 Dec 2011 03:01:09 GMT https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210458#M15812 Barry Kelly 2011-12-06T03:01:09Z https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210459#M15813 The other way is to change the value to string and check if the string ="0" (if the STR parameters set to put 1 character)<BR /> <BR /> If the object has some predefined heights/lenghts/whatever it is kind of useful.<BR /> <BR /> But if the only one thingy is checked - the mentioned before solutions are better.<BR /> <BR /> Best Regards,<BR /> Piotr Tue, 06 Dec 2011 07:46:39 GMT https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210459#M15813 Piotr Dobrowolski 2011-12-06T07:46:39Z https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210460#M15814 Piotr, Barry and Vistasp,<BR /> <BR /> Thanks for the insight and suggestions, I will try these and see if i can get to run as i think it should. <BR /> <BR /> Thanks<BR /> <BR /> David Tue, 06 Dec 2011 15:37:07 GMT https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210460#M15814 Dave Seabury 2011-12-06T15:37:07Z https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210461#M15815 Please see this thread.<BR /> <A href="http://archicad-talk.graphisoft.com/viewtopic.php?p=44256&amp;highlight=real+types#44256" target="_blank"><LINK_TEXT text="http://archicad-talk.graphisoft.com/vie ... ypes#44256">http://archicad-talk.graphisoft.com/viewtopic.php?p=44256&amp;highlight=real+types#44256</LINK_TEXT></A><BR /> Peter Devlin Tue, 06 Dec 2011 22:27:25 GMT https://community.graphisoft.com/t5/Libraries-objects/Use-of-real-types/m-p/210461#M15815 Anonymous 2011-12-06T22:27:25Z