diamond from 2 triangles

Hallo,

I want to create a diamond shape from 2 triangles. The corners have a particular degrees that stays the same at al time. each triangle has to be parametric from the center, so when I change one.. the other has to adapt. At the corners I have place cirkels that move when i scale the totals shape (diamond). I tried to achieve this with the triangle component, but then i cant place the points at the corners to act as an reference plane of the cirkels. Can anyone help me with this?

I've added an image to make my story clear.

(i'am new at grasshopper, so any help would be appreciated.)

Attachments:

Triangled_diamond.jpg, 683 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on December 30, 2015 at 8:12am

Your description is not entirely clear to me. Here is some code that allows you to set the size (radius) of the equilateral triangle (the top one) while the bottom one scales with it. Both triangles retain fixed angles at all vertices. The radius of the circles is set with a separate slider.

Attachments:

triangles_2015Dec30a.gh, 12 KB

Permalink Reply by Yamoh Rasa on December 30, 2015 at 11:03am

Joseph thank you for replying. This works great...

one another thing:

I would like to manipulate each circle individually. The reason for this is that I have five towers, on every corner and the towers are also parametric. So I need a method like "explode" to get the points of the corner so I can assign the points as base plane for the circle (which eventually becomes a tower) I'm new to GH and parametricism, so my vocabulary on this is very poor. Hope my description is clear now.

Permalink Reply by Joseph Oster on December 30, 2015 at 11:29am

Yes, your description of the problem is very poor... I don't see any towers, that sounds like an irrelevant detail. I see four circles, not five. There are four points connected to the 'P' input of the 'Circle (Cir)' component; if you connect four 'Radius' sliders to the 'Radius (R)' input instead of just the one shown, you can control their radii individually.

Permalink Reply by Joseph Oster on December 30, 2015 at 11:43am

I just told you that. The four points are connected to the 'P' input of the 'Circle (Cir)' component in the code I posted.

Permalink Reply by Yamoh Rasa on December 31, 2015 at 3:50am

I understand that. But the problem is when I apply the move component al of the circles move (see image 1), that's because they are still linked in the "cir" component. What I need is shown is the second image. I have to extract single points from the "disc" component. I surfed on the web, but couldn't find anything about it...

Thank you for your help.

Permalink Reply by Yamoh Rasa on December 31, 2015 at 5:09am

found it....tnx for your patients and help

Permalink Reply by Joseph Oster on December 31, 2015 at 7:32am

Only three of the points come from 'Disc' - the discontinuities or vertices of the top triangle. The fourth point comes from the 'pA' output of 'LLX', the Line-Line Intersection.

You can use 'List Item' to get the points or circles anywhere along the chain of components. In this case, I would use a single 'Move' or 'Extrude' component with separate sliders for the 'Z' values:

Attachments:

triangles_2015Dec31a.gh, 18 KB

Permalink Reply by Yamoh Rasa on January 1, 2016 at 6:47am

thanks,

because I'am new to GH i do reverse engineering to learn how the components works and what it does.

by the way...Happy new Year!

and thanks for your help.

Permalink Reply by Joseph Oster on December 30, 2015 at 8:24am

This one uses a 'ratio' slider (zero to one) that sets the circle radius as a fraction of the polygon (top triangle) edge length, so the circles keep the same proportion as the triangle size changes:

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