Draw a point a set distance away from a base point
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26-09-2019 - |
문제
I'm trying to figure out an algorithm for finding a random point a set distance away from a base point. So for example:
This could just be basic maths and my brain not working yet (forgive me, haven't had my coffee yet :) ), but I've been trying to work this out on paper and I'm not getting anywhere.
해결책
coordinate of point on circle with radius R and center (xc, yc):
x = xc + R*cos(a);
y = yc + R*sin(a);
changing value of angle a from 0 to 2*PI you can find any point on circumference.
다른 팁
Use the angle from the verticle as your random input.
Pseudocode:
angle = rand(0,1)
x = cos(angle * 2 * pi) * Radius + x_centre
y = sin(angle * 2 * pi) * Radius + y_centre
Basic Pythagoras.
Pick random number between 0 and 50 and solve h^2 = a^2 + b^2 Add a few random descisions on direction.
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