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Added functions for circle() and square()

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Revar Desmera 2019-05-26 21:14:22 -07:00
parent d59d872dec
commit 3a835705d3
1 changed files with 20 additions and 4 deletions
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24
primitives.scad
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@ -12,11 +12,12 @@
// Section: 2D Primitives
// Module: square()
// Function&Module: square()
// Usage:
// square(size, [center], [anchor])
// Description:
// Creates a 2D square of the given size.
// When called as a module, creates a 2D square of the given size.
// When called as a function, returns a 2D path/list of points for a square/rectangle of the given size.
// Arguments:
// size = The size of the square to create. If given as a scalar, both X and Y will be the same size.
// center = If given and true, overrides `anchor` to be `CENTER`. If given and false, overrides `anchor` to be `FRONT+LEFT`.
@ -38,12 +39,19 @@ module square(size, center=undef, anchor=FRONT+LEFT, spin=0) {
}
}
function square(size, center=undef, anchor=FRONT+LEFT, spin=0) =
let(
size = is_num(size)? [size,size] : point2d(size),
s=size/2
) rot(spin, p=move(-vmul(anchor,s), p=[[-s.x,-s.y], [-s.x,s.y], [s.x,s.y], [s.x,-s.y]]));
// Module: circle()
// Function&Module: circle()
// Usage:
// circle(r|d, [anchor])
// Description:
// Creates a 2D circle of the given size.
// When called as a module, creates a 2D circle of the given size.
// When called as a function, returns a 2D path/list of points for a circle of the given size.
// Arguments:
// r = The radius of the circle to create.
// d = The diameter of the circle to create.
@ -66,6 +74,14 @@ module circle(r=undef, d=undef, anchor=CENTER, spin=0) {
}
function circle(r=undef, d=undef, anchor=CENTER, spin=0) =
let(
r = get_radius(r=r, d=d, dflt=1),
sides = segs(r),
pts = [for (i=[0:1:sides-1]) let(a=360-i*360/sides) r*[cos(a),sin(a)]]
) rot(spin, p=move(-vmul(anchor,s), p=pts));
// Section: Primitive Shapes