How to draw a line of a specifc length along a radian or angle?

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orientsee

How to draw a line of a specifc length along a radian or angle?

in General Discussion • Other • 9 months ago

I would like to draw a graph much like a starburst. Each line would follow a line drawn from a point of origin along a specific angle or radian. Each line would also have a specific length corresponding to a data value. I would like to specify a point on the angle and then continue from that point along a angle for a specific distance. I am hazy on trig. Is there a built in function to do this sort of thing or a library that does it?

Replies(2)

Chrisir

Re: How to draw a line of a specifc length along a radian or angle?

9 months ago

that's fairly easy

see

http://processing.org/learning/trig/

Here's how you actually use the trig functions in Processing:

  float x = cos(radians(angle)) * radius;

  float y = sin(radians(angle)) * radius;

angle is a value between 0 and 359

radius gives you the length of the line

x and y is the end point of your line (outside of the circle).

now say

line(originX,originY,x,y);

originX and Y being your center, eg

originX=width/2;

orientsee

Re: How to draw a line of a specifc length along a radian or angle?

9 months ago

Thanks!

It's always the nose in the middle of your face that you forget.

Once again, thanks!

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