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Fixed translate_points() and scale_points() for 2D.

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Revar Desmera 2019-10-23 22:51:22 -07:00
parent b0caccebe7
commit 22e6ced9f4
1 changed files with 12 additions and 4 deletions
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16
coords.scad
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@ -74,7 +74,10 @@ function path4d(points, fill=0) = [for (point = points) point4d(point, fill=fill
// Arguments:
// pts = List of points to translate.
// v = Amount to translate points by.
function translate_points(pts, v=[0,0,0]) = [for (pt = pts) pt+v];
function translate_points(pts, v=[0,0,0]) =
pts==[]? [] : let(
v=point3d(v)
) [for (pt = pts) pt+v];
// Function: scale_points()
@ -86,7 +89,11 @@ function translate_points(pts, v=[0,0,0]) = [for (pt = pts) pt+v];
// pts = List of points to scale.
// v = A vector with a scaling factor for each axis.
// cp = Centerpoint to scale around.
function scale_points(pts, v=[0,0,0], cp=[0,0,0]) = [for (pt = pts) [for (i = [0:1:len(pt)-1]) (pt[i]-cp[i])*v[i]+cp[i]]];
function scale_points(pts, v=[1,1,1], cp=[0,0,0]) =
pts==[]? [] : let(
cp = point3d(cp),
v = point3d(v,fill=1)
) [for (pt = pts) vmul(pt-cp,v)+cp];
// Function: rotate_points2d()
@ -187,8 +194,9 @@ function rotate_points3d(pts, a=0, v=undef, cp=[0,0,0], from=undef, to=undef, re
// r = distance from the origin.
// theta = angle in degrees, counter-clockwise of X+.
// Examples:
// xy = polar_to_xy(20,30);
// xy = polar_to_xy([40,60]);
// xy = polar_to_xy(20,45); // Returns: ~[14.1421365, 14.1421365]
// xy = polar_to_xy(40,30); // Returns: ~[34.6410162, 15]
// xy = polar_to_xy([40,30]); // Returns: ~[34.6410162, 15]
function polar_to_xy(r,theta=undef) = let(
rad = theta==undef? r[0] : r,
t = theta==undef? r[1] : theta