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I am trying to draw a circle segment from 0 to 360 degrees, with a radius that gets bigger while the circle is being drawn. For example: at 0 degrees, the radius of the (to be drawn) circle is 10 and at 360 degrees, the radius is 12 (and all the values in between need to be calculated. I this possible?

I am working in Tinkercad to try make this spiral, but I really have no clue to do this. google doesn't help me much further as all I can find is code snippets that actually use a "circle" drawing command. I, however, would think I need to go point by point?

Spektre
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Michel Wouterse
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  • You only need a sequence of arc-drawing, each one starting at the previous end, and with increasing radius. Some code you may post here help us a lot. – Ripi2 Jun 25 '23 at 17:04

1 Answers1

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If radius increment per round is constant - you need Archimedean spiral (note there is a lot of spiral kinds with other radius/theta dependencies)

enter image description here

Radius linearly depends on angle (cumulative angle from beginning)

r = r0 + b * theta

For your example

 r0 = 10
 b = 1/Pi

In coordinates

x = cx + r * cos(theta)
y = cy + r * sin(theta)

A method for placing points at spiral equidistantly (or draw small ine segments)

MBo
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