function between()

[asyvn]

Hi,

I have code and use function between to check O between B and C. Return value is 'true'. This function returns true when 3 points are not collinear?

My code:

import geometry;
unitsize(1cm);
defaultpen(fontsize(7pt));

point A = (0.9, 3); dot("$A$", A, NW);
point B = (0,0); dot("$B$", B, SW);
point C = (5,0.4); dot("$C$", C, SE);
point O = circle(A, B, C).C; dot("$O$", O, NW);

write(between(B, O, C));```

between() function use sameside() function may be cannot check 3 points collinear?

[johncbowman]

To test for colinearity, check whether orient(B,O,C) == 0.