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Added plane_line_angle

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This commit is contained in:
Adrian Mariano 2020-02-13 18:06:20 -05:00
parent 9ce9d708a4
commit bfcc45c998
1 changed files with 15 additions and 0 deletions
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15
geometry.scad
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@ -658,6 +658,21 @@ function _general_plane_line_intersection(plane, line, eps=EPSILON) =
) [pt, s1];
// Function: plane_line_angle()
// Usage: plane_line_angle(plane,line)
// Description:
// Compute the angle between a plane [A, B, C, D] and a line, specified as a pair of points [p1,p2].
// The resulting angle is signed, with the sign positive if the vector p2-p1 lies on
// the same side of the plane as the plane's normal vector.
function plane_line_angle(plane, line) =
let(
vect = line[1]-line[0],
zplane = plane_normal(plane),
sin_angle = vect*zplane/norm(zplane)/norm(vect)
)
asin(constrain(sin_angle,-1,1));
// Function: plane_line_intersection()
// Usage:
// pt = plane_line_intersection(plane, line, [eps]);