$XMAX not working in 15?

[Pancho]

I just hoped that this otl would save my day, but it just causes additional problems.

http://www.creatogether.com/hou-curveoffset/

The rotate_back node at the end displays the errors which are produced in the temp_rotate node at the beginning.

So I replaced $CEX,$CEY... with $GCX,.... Error messages disappear. But the expression 90*min($XMAX-$XMIN,1) still causes problems. WHY! Is $XMAX also something from the past and replaced in the meantime by another syntax?

If there would be another way to inset a polygon/curve without running into interseting errors I would also be open for another solution.

Cheers

Tom

[loopyllama]

$XMAX and $XMIN work. Put down a box, then a transform, then put $XMIN in tx and the box moves. Look at the value $XMIN produces in the field...0...it cannot be evaluated in the field.

 

Try calculating that expression in an attribute, then have that "temp_rotate" node grab the value from the attribute rather than the field that it cannot evaluate.

[Pancho]

Thanks for the tip! Since I'm a beginner: How would I do that pratically? Attribute Create and put the formula into the "Value" field? Would I position this before the first node of the otl?

[Pancho]

O.k., I used an "Attribute Create", value is the formula and class is set either to detail or primitve, name is bbxa and bbya. When I try to get the value in the transform node with $BBXA and $BBYA or bbxa there error still remains. I used to be able to deal with variables in SI pretty easily, but in H everything seems to be a bit more complicated. So, how does it work?

Cheers

Tom

P.S.: In the geometry spreadsheet the values appear correctly, though with class set to primitive they disappear at the fuse_close node.

Edited November 14, 2015 by Pancho

[loopyllama]

just stuff the attribute into a detail (means it only does it once). you access the attribute by the "detail" expression. If you had a point attribute, you access by the "point" expression, etc. Sometimes certain nodes have special variables only accessible to that node, called local variables. The transform has $XMIN, $XMAX, among others. Check the help for that node and scroll to the bottom to see available local variables.

curveOffset_example_fixed.hipnc

[Pancho]

Thanks so much! BTW, do you know of a better way to do this kind of inset? Still run into a lot of problems.

Cheers

Tom