topic Re: Why doesn't my 2D poly calculation work? in Libraries & objects

Why doesn't my 2D poly calculation work?

JGoode — Tue, 08 Aug 2017 12:22:47 GMT

I can't seem to work out why the calculations don't seem to be working as I think I might have used the same sort of calculation previously. Is there any reason why it is not changing the object at all?

Re: Why doesn't my 2D poly calculation work?

Piotr Dobrowolski — Tue, 08 Aug 2017 15:36:18 GMT

Use put and get for polygons instead writing inline.
no of nodes will be depending on the command type NSP/3..4..5
(how many status type data after coords)
and the all points at the end of the _poly like command will be "get(nsp)"

Best Regards,
Piotr

Re: Why doesn't my 2D poly calculation work?

Barry Kelly — Wed, 09 Aug 2017 01:31:18 GMT

Using PUT and GET for polygon nodes is great when the number of nodes is variable.
In a case like this where the number of nodes is fixed it really won't make any difference.

Are you saying that when you adjust the value of the 'rail_width' parameter that your object is not changing?
If so do a find and select for 'rail_width' in the master parameter and the first part of this 2D script to see if the value for that parameter is being set - overriding the parameter value.

Or possibly you are using a value for 'rail_width' that just doesn't make sense for the points you are plotting - i.e. value is too small?

Otherwise I don't understand what you mean by 'calculation' as all you have here is a polygon definition.

Barry.

Re: Why doesn't my 2D poly calculation work?

JGoode — Wed, 09 Aug 2017 11:18:52 GMT

Barry wrote:
Otherwise I don't understand what you mean by 'calculation' as all you have here is a polygon definition.

The calculation that defines the points in the object as in rail_width/2-(rail_width/2-0.49*********)
All bits of the definition that included this didn't work so I was wondering if there was a reason why they wouldn't work. I have it working now anyway using a different method.

Re: Why doesn't my 2D poly calculation work?

Piotr Dobrowolski — Wed, 09 Aug 2017 13:49:02 GMT

Ok what is the error?
Polygon does not show? or shows incorrectly? You get error message (what message)?

Best Regards,
Piotr

Re: Why doesn't my 2D poly calculation work?

Bruce — Thu, 10 Aug 2017 01:18:44 GMT

Have you checked to make sure you haven't accidentally created a 2D symbol, as from memory this will stop the 2D script from running?

Re: Why doesn't my 2D poly calculation work?

Barry Kelly — Thu, 10 Aug 2017 02:00:16 GMT

Bruce wrote:
Have you checked to make sure you haven't accidentally created a 2D symbol, as from memory this will stop the 2D script from running?

If there is a 2D script this should override anything drawn in the 2D symbol window.
Unless it is called as a FRAGMENT.

Barry.

Re: Why doesn't my 2D poly calculation work?

Barry Kelly — Thu, 10 Aug 2017 02:03:53 GMT

JGoode wrote:
Barry wrote:
Otherwise I don't understand what you mean by 'calculation' as all you have here is a polygon definition.
The calculation that defines the points in the object as in rail_width/2-(rail_width/2-0.49*********)
All bits of the definition that included this didn't work so I was wondering if there was a reason why they wouldn't work. I have it working now anyway using a different method.

I don't see anything wrong with your script.
So long as you are adjusting the parameter for 'rail_width' your object should adjust.
But as I said be sure this parameter is not being set to a fixed value before the polygon or in the master or parameter script.

It is very hard to tell what is happening without seeing the entire object scripts.

Barry.

Re: Why doesn't my 2D poly calculation work?

Anonymous — Fri, 11 Aug 2017 04:54:57 GMT

Hi,

it appears like you are trying to draw flanges, connections to the wall?

assuming that 0.49266 is a big number, or spacing between....that may be where you are going wrong....as you are canceling out your Rail_width/2 by adding it then minusing it at that point you are using that big number...

this looks like code from a projection with the facets of a curve turned into code...when it should be just the true size...

choosing a simple Poly2_B script(not fill distortions)
4 points, plus closing point (5 in total)(-1 to close a poly at end)

Flange_Depth = 0.012
Flange_Diameter = 0.04225

for the origin it would be
Poly2_b 5, 3, gs_fill_pen, gs_back_pen,
-Flange_Diameter/2, 0, 1,
-Flange_Diameter/2, Flange_Depth, 1,
Flange_Diameter/2, Flange_Depth, 1,
Flange_Diameter/2, 0, 1,
-Flange_Diameter/2, 0, -1

for the middle connection it would be...
Poly2_b 5, 3, gs_fill_pen, gs_back_pen,
Rail_width/2-Flange_Diameter/2, 0, 1,
Rail_width/2-Flange_Diameter/2, Flange_Depth, 1,
Rail_width/2+Flange_Diameter/2, Flange_Depth, 1,
Rail_width/2+Flange_Diameter/2, 0, 1,
Rail_width/2-Flange_Diameter/2, 0, -1

for the far end it would be...
Poly2_b 5, 3, gs_fill_pen, gs_back_pen,
Rail_width-Flange_Diameter/2, 0, 1,
Rail_width-Flange_Diameter/2, Flange_Depth, 1,
Rail_width+Flange_Diameter/2, Flange_Depth, 1,
Rail_width+Flange_Diameter/2, 0, 1,
Rail_width-Flange_Diameter/2, 0, -1

39 points is a lot for a simple shape....especially when the y-value does not change (only 2 values)