[Feature] Random point on Triangle about canvas-sketch-util HOT 3 OPEN

Hey! Thanks for the issue request. I do agree this would be useful, I would say something like:

random.insideTriangle(a, b, c, out = [], u = random.value(), v = random.value());

I already have an implementation I am using in my local code:

https://gist.github.com/mattdesl/4337f1ad890d3fc713e1b42dbb1603ff

I think adding insideTriangle should also probably have onTriangle (i.e. on the perimeter of the triangle) for parity with circle/sphere, but finding a random point around a triangle edge may be a little trickier (i.e. weighted random based on line segment lengths?).

from canvas-sketch-util.

Oops, I misread your comment! It seems like you want points on the edge not inside the triangle. But yes maybe both variations would be good to have!

from canvas-sketch-util.

Matt,

Yes, I was thinking that in and on triangle would be complementary code 😄

I looked at your current implementation. It's very concise! That would have taken me probably 50 lines at least 😐

Do I understand it correctly?

• Pass in 3 coordinate pairs a, b, c
• Generate 2 random numbers < 1.0 u, v
• Check that they aren't too big
• Create a 3rd random factor Q by subtracting u, v from 1.0
• Apply the random factors to each member of each coordinate pair
• Return a single [x,y] pair

That's a clever way of doing it!

I have some working code that calculates the slope-intercept y=mx+b formula for the side of the triangle, generates a random X coordinate, and then calculates which Y coordinate intersects at that X. I think I could translate that into a generic module if you want.

from canvas-sketch-util.