topic Re: Adjust the curves of my fill in Libraries & objects

Adjust the curves of my fill

JGoode — Tue, 11 Feb 2020 16:24:17 GMT

Hello,

I'm trying to create a fill object that I can adjust the points of the fill to wherever I want them. I also want to be able to adjust the curved sides.

Is it possible to achieve this with my script? I'd like to use a length hotspot to adjust the curve. Any help would be appreciated.

poly2_b{5}      13,      3,      0,      3,      19,      19, 
                   0,            0,            1,            0,            0,            1,            0, 

                   posx1,            posy1,      1, 
        		   mposx1,          mposy1,    900, 
                   0,         -180,   4001,
 
        		   posx2,          posy2,      1, 
        		 mposx2,          mposy2,    900, 
                   0,         -180,   4001,
 
        		 posx3,          posy3,      1, 
        		 mposx3,          mposy3,    900, 
                   0,         -180,   4001,
 
        		 posx4, 			 posy4,      1, 
        		 mposx4, 			 mposy4,    900, 
                   0,         -180,   4001,
 
                   posx1,            posy1,      1

FYI Master Script

mposx1 = ((posx1+posx2)/2)
mposx2 = ((posx2+posx3)/2)
mposx3 = ((posx3+posx4)/2)
mposx4 = ((posx4+posx1)/2)
parameters mposx1=mposx1, mposx2=mposx2, mposx3=mposx3, mposx4=mposx4

mposy1 = ((posy1+posy2)/2)
mposy2 = ((posy2+posy3)/2)
mposy3 = ((posy3+posy4)/2)
mposy4 = ((posy4+posy1)/2)
parameters mposy1=mposy1, mposy2=mposy2, mposy3=mposy3, mposy4=mposy4

And the pos values are as follows -
posx1 = 0
posx2 = 0
posx3 = 200
posx4 = 200
posy1 = 0
posy2 = 200
posy3 = 200
posy4 = 0

Thanks

Re: Adjust the curves of my fill

Anonymous — Tue, 11 Feb 2020 20:06:15 GMT

Hi jGoode,
You can control any of these parameters with Graphical Editable Hotspots.
You can find all the information here.
Hope that helps.

Re: Adjust the curves of my fill

JGoode — Wed, 12 Feb 2020 10:14:50 GMT

Braza wrote:
Hi jGoode,
You can control any of these parameters with Graphical Editable Hotspots.
You can find all the information here.
Hope that helps.

Sorry, I must not have explained clearly. I know how to add hotspots to the rest of them (eg pos1x) but I want to be able to adjust the -180 values to adjust the curve. However I can't see how that's possible with the current method of adding the curves.

Re: Adjust the curves of my fill

Anonymous — Wed, 12 Feb 2020 10:41:51 GMT

Ok. I see.
I think you can find some light in the Dynamic Polyline base code that Mr. sinceV6 generously shared with us, and along with equal generous contributions of Mr. Hmooslechner, Mr. Mariosmic and the legendary GDL master Mr. Olivier Dentan.
Hope that helps.

Re: Adjust the curves of my fill

JGoode — Wed, 12 Feb 2020 16:27:41 GMT

I have previously seen this - however they don't have curved edges and the one that does, isn't a fill and therefore works differently to what I need.

Re: Adjust the curves of my fill

Anonymous — Wed, 12 Feb 2020 17:54:13 GMT

It is not a fill, but it has arched segments controlled by an editable hotspot.
You can isolate the code for the hotspot and reverse engineering it apply to your fill.
The Mariosmic version seems to have what you need. Have you tried?

Re: Adjust the curves of my fill

JGoode — Thu, 13 Feb 2020 10:04:10 GMT

I have seen this in the past and reviewed more recently - The curves are made out of Arcs which don't translate to fills at all.

The method I want to use to be able to adjust the curve is have a centre point half way between the 2 points and then set the distance from the centre point to the arc – Is this possible to do in a fill and if so, how can I do it?

Re: Adjust the curves of my fill

Anonymous — Thu, 13 Feb 2020 17:13:08 GMT

Your arched fill segments are defined by additional Status Codes 900 (center point) and 4000 (Arc using centerpoint and angle).
If you want to control the arch using a length hotspot, you will have to tie the arc angle and center point with this length.
You just have to do the trigonometry.

Re: Adjust the curves of my fill

Lingwisyer — Fri, 14 Feb 2020 01:24:32 GMT

Both of which he has used. Is not the issue here less the curves, more the definition of the hotspots as they are calculated in a straight line from origin?

Given your code, does not the end point of the curve equal the following point? In turn that simplifies all of your hotspots to basic singular trig.

Ling.

Re: Adjust the curves of my fill

Anonymous — Fri, 14 Feb 2020 10:54:37 GMT

JGoode deffined a fixed centerpoint at the middle of each arched segment.
If he wants to modify the arc curvature with a hotspot, the center point will necessarily be modified too.
Unless he wants the angle to be fixed in -180 degrees.
Or perhaps, most likely, I am missing the point.

Re: Adjust the curves of my fill

JGoode — Fri, 14 Feb 2020 12:15:27 GMT

Braza, you're correct - at current the centre point definition is to the middle of the line however I've since come to learn that is not going to work as there's no way for AC to do what I want directly. I do want to modify the arc with a hotspot.

Re: Adjust the curves of my fill

Anonymous — Sun, 16 Feb 2020 11:37:57 GMT

I understand your frustration.
This is the classical example that GDL is not for the masses.
Anyone with visual/design background would expect to have a more easy way to control an arched edge. Instead we have to do complex geometric calculations to get things the way we want. i.e. Why don´t we have a fill status code that defines a node as a point in an arch between the previous and the next node? And with this we could simple define an editable hotspot with this node position and freely edit.

I wonder if Grasshopper could handle this kind of thing.

Perhaps when we start having Artificial Intelligence for design, GDL will become popular among AI System.

Re: Adjust the curves of my fill

sinceV6 — Sun, 23 Feb 2020 19:01:05 GMT

Hi all.
Long time not here

JGoode wrote:
...
The method I want to use to be able to adjust the curve is have a centre point half way between the 2 points and then set the distance from the centre point to the arc – Is this possible to do in a fill and if so, how can I do it?

Something like this?

Braza wrote:
If you want to control the arch using a length hotspot, you will have to tie the arc angle and center point with this length.
You just have to do the trigonometry

What Braza states is accurate; but maaaaannn.... I remember doing the trig calculations and it sent me back to school.

While the object in the gif is the updated polyline script, it is just a polyline. To make things work with fills and polys you'll need to make those extra status code points part of the moving hotspots. It is doable, but requires some work.

Cheers!
Best regards.

Re: Adjust the curves of my fill

Lingwisyer — Mon, 24 Feb 2020 01:46:34 GMT

Intersecting Cord Theorem, interesting.