mirror of
https://github.com/BelfrySCAD/BOSL2.git
synced 2024-12-29 16:29:40 +00:00
move half-space stuff to partitions.scad
This commit is contained in:
Adrian Mariano
parent
edde34ff76
commit
50191bf5fd
2 changed files with 342 additions and 341 deletions
338
mutators.scad
338
mutators.scad
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@ -8,9 +8,8 @@
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// FileFootnotes: STD=Included in std.scad
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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// Section: Volume Division Mutators
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// Section: Bounding Box
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//////////////////////////////////////////////////////////////////////
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// Module: bounding_box()
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@ -96,341 +95,6 @@ module bounding_box(excess=0, planar=false) {
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}
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// Function&Module: half_of()
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//
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// Usage: as module
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// half_of(v, [cp], [s], [planar]) ...
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// Usage: as function
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// result = half_of(p,v,[cp]);
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//
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// Description:
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// Slices an object at a cut plane, and masks away everything that is on one side. The v parameter is either a plane specification or
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// a normal vector. The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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// When called as a function, you must supply a vnf, path or region in p. If planar is set to true for the module version the operation
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// is performed in 2D and UP and DOWN are treated as equivalent to BACK and FWD respectively.
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//
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// Arguments:
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// p = path, region or VNF to slice. (Function version)
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// v = Normal of plane to slice at. Keeps everything on the side the normal points to. Default: [0,0,1] (UP)
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// cp = If given as a scalar, moves the cut plane along the normal by the given amount. If given as a point, specifies a point on the cut plane. Default: [0,0,0]
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// planar = If true, perform a 2D operation. When planar, a `v` of `UP` or `DOWN` becomes equivalent of `BACK` and `FWD` respectively. (Module version). Default: false.
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//
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// Examples:
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// half_of(DOWN+BACK, cp=[0,-10,0]) cylinder(h=40, r1=10, r2=0, center=false);
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// half_of(DOWN+LEFT, s=200) sphere(d=150);
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// Example(2D):
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// half_of([1,1], planar=true) circle(d=50);
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module half_of(v=UP, cp, s=100, planar=false)
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{
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cp = is_vector(v,4)? assert(cp==undef, "Don't use cp with plane definition.") plane_normal(v) * v[3] :
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is_vector(cp)? cp :
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is_num(cp)? cp*unit(v) :
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[0,0,0];
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v = is_vector(v,4)? plane_normal(v) : v;
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if (cp != [0,0,0]) {
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translate(cp) half_of(v=v, s=s, planar=planar) translate(-cp) children();
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} else if (planar) {
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v = (v==UP)? BACK : (v==DOWN)? FWD : v;
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ang = atan2(v.y, v.x);
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difference() {
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children();
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rotate(ang+90) {
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back(s/2) square(s, center=true);
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}
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}
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} else {
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difference() {
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children();
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rot(from=UP, to=-v) {
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up(s/2) cube(s, center=true);
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}
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}
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}
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}
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function half_of(p, v=UP, cp) =
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is_vnf(p) ?
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assert(is_vector(v) && (len(v)==3 || len(v)==4),str("Must give 3-vector or plane specification",v))
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assert(select(v,0,2)!=[0,0,0], "vector v must be nonzero")
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let(
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plane = is_vector(v,4) ? assert(cp==undef, "Don't use cp with plane definition.") v
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: is_undef(cp) ? [each v, 0]
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: is_num(cp) ? [each v, cp*(v*v)/norm(v)]
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: assert(is_vector(cp,3),"Centerpoint must be a 3-vector")
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[each v, cp*v]
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)
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vnf_halfspace(plane, p)
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: is_path(p) || is_region(p) ?
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let(
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v = (v==UP)? BACK : (v==DOWN)? FWD : v,
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cp = is_undef(cp) ? [0,0]
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: is_num(cp) ? v*cp
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: assert(is_vector(cp,2) || (is_vector(cp,3) && cp.z==0),"Centerpoint must be 2-vector")
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cp
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)
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assert(is_vector(v,2) || (is_vector(v,3) && v.z==0),"Must give 2-vector")
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assert(!all_zero(v), "Vector v must be nonzero")
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let(
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bounds = pointlist_bounds(move(-cp,p)),
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L = 2*max(flatten(bounds)),
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n = unit(v),
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u = [-n.y,n.x],
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box = [cp+u*L, cp+(v+u)*L, cp+(v-u)*L, cp-u*L]
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)
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intersection(box,p)
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: assert(false, "Input must be a region, path or VNF");
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/* This code cut 3d paths but leaves behind connecting line segments
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is_path(p) ?
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//assert(len(p[0]) == d, str("path must have dimension ", d))
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let(z = [for(x=p) (x-cp)*v])
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[ for(i=[0:len(p)-1]) each concat(z[i] >= 0 ? [p[i]] : [],
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// we assume a closed path here;
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// to make this correct for an open path,
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// just replace this by [] when i==len(p)-1:
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let(j=(i+1)%len(p))
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// the remaining path may have flattened sections, but this cannot
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// create self-intersection or whiskers:
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z[i]*z[j] >= 0 ? [] : [(z[j]*p[i]-z[i]*p[j])/(z[j]-z[i])]) ]
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:
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*/
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// Function&Module: left_half()
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//
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// Usage: as module
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// left_half([s], [x]) ...
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// left_half(planar=true, [s], [x]) ...
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// Usage: as function
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// result = left_half(p, [x]);
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//
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// Description:
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// Slices an object at a vertical Y-Z cut plane, and masks away everything that is right of it.
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// The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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//
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// Arguments:
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// p = VNF, region or path to slice (function version)
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// x = The X coordinate of the cut-plane. Default: 0
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// planar = If true, perform a 2D operation. (Module version) Default: false.
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// Examples:
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// left_half() sphere(r=20);
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// left_half(x=-8) sphere(r=20);
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// Example(2D):
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// left_half(planar=true) circle(r=20);
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module left_half(s=100, x=0, planar=false)
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{
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dir = LEFT;
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difference() {
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children();
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translate([x,0,0]-dir*s/2) {
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if (planar) {
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square(s, center=true);
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} else {
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cube(s, center=true);
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}
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}
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}
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}
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function left_half(p,x=0) = half_of(p, LEFT, [x,0,0]);
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// Function&Module: right_half()
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//
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// Usage: as module
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// right_half([s], [x]) ...
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// right_half(planar=true, [s], [x]) ...
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// Usage: as function
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// result = right_half(p, [x]);
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//
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// Description:
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// Slices an object at a vertical Y-Z cut plane, and masks away everything that is left of it.
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// The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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// Arguments:
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// p = VNF, region or path to slice (function version)
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// x = The X coordinate of the cut-plane. Default: 0
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// planar = If true, perform a 2D operation. (Module version) Default: false.
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// Examples(FlatSpin,VPD=175):
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// right_half() sphere(r=20);
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// right_half(x=-5) sphere(r=20);
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// Example(2D):
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// right_half(planar=true) circle(r=20);
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module right_half(s=100, x=0, planar=false)
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{
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dir = RIGHT;
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difference() {
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children();
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translate([x,0,0]-dir*s/2) {
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if (planar) {
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square(s, center=true);
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} else {
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cube(s, center=true);
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}
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}
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}
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}
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function right_half(p,x=0) = half_of(p, RIGHT, [x,0,0]);
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// Function&Module: front_half()
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//
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// Usage:
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// front_half([s], [y]) ...
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// front_half(planar=true, [s], [y]) ...
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// Usage: as function
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// result = front_half(p, [y]);
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//
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// Description:
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// Slices an object at a vertical X-Z cut plane, and masks away everything that is behind it.
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// The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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// Arguments:
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// p = VNF, region or path to slice (function version)
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// y = The Y coordinate of the cut-plane. Default: 0
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// planar = If true, perform a 2D operation. (Module version) Default: false.
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// Examples(FlatSpin,VPD=175):
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// front_half() sphere(r=20);
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// front_half(y=5) sphere(r=20);
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// Example(2D):
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// front_half(planar=true) circle(r=20);
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module front_half(s=100, y=0, planar=false)
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{
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dir = FWD;
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difference() {
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children();
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translate([0,y,0]-dir*s/2) {
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if (planar) {
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square(s, center=true);
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} else {
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cube(s, center=true);
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}
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}
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}
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}
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function front_half(p,y=0) = half_of(p, FRONT, [0,y,0]);
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// Function&Module: back_half()
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//
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// Usage:
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// back_half([s], [y]) ...
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// back_half(planar=true, [s], [y]) ...
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// Usage: as function
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// result = back_half(p, [y]);
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//
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// Description:
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// Slices an object at a vertical X-Z cut plane, and masks away everything that is in front of it.
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// The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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// Arguments:
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// p = VNF, region or path to slice (function version)
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// y = The Y coordinate of the cut-plane. Default: 0
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// planar = If true, perform a 2D operation. (Module version) Default: false.
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// Examples:
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// back_half() sphere(r=20);
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// back_half(y=8) sphere(r=20);
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// Example(2D):
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// back_half(planar=true) circle(r=20);
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module back_half(s=100, y=0, planar=false)
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{
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dir = BACK;
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difference() {
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children();
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translate([0,y,0]-dir*s/2) {
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if (planar) {
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square(s, center=true);
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} else {
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cube(s, center=true);
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}
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}
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}
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}
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function back_half(p,y=0) = half_of(p, BACK, [0,y,0]);
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// Function&Module: bottom_half()
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//
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// Usage:
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// bottom_half([s], [z]) ...
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// Usage: as function
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// result = bottom_half(p, [z]);
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//
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// Description:
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// Slices an object at a horizontal X-Y cut plane, and masks away everything that is above it.
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// The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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// Arguments:
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// p = VNF, region or path to slice (function version)
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// z = The Z coordinate of the cut-plane. Default: 0
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// Examples:
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// bottom_half() sphere(r=20);
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// bottom_half(z=-10) sphere(r=20);
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module bottom_half(s=100, z=0)
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{
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dir = DOWN;
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difference() {
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children();
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translate([0,0,z]-dir*s/2) {
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cube(s, center=true);
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}
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}
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}
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function bottom_half(p,z=0) = half_of(p,BOTTOM,[0,0,z]);
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// Function&Module: top_half()
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//
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// Usage:
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// top_half([s], [z]) ...
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// result = top_half(p, [z]);
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//
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// Description:
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// Slices an object at a horizontal X-Y cut plane, and masks away everything that is below it.
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// The s parameter is needed for the module
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
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// wrong half, but if it is too small it won't fully mask your model.
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// Arguments:
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// p = VNF, region or path to slice (function version)
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// z = The Z coordinate of the cut-plane. Default: 0
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// Examples(Spin,VPD=175):
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// top_half() sphere(r=20);
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// top_half(z=5) sphere(r=20);
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module top_half(s=100, z=0)
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{
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dir = UP;
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difference() {
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children();
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translate([0,0,z]-dir*s/2) {
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cube(s, center=true);
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}
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}
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}
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function top_half(p,z=0) = half_of(p,UP,[0,0,z]);
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//////////////////////////////////////////////////////////////////////
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// Section: Warp Mutators
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//////////////////////////////////////////////////////////////////////
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345
partitions.scad
345
partitions.scad
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@ -1,15 +1,352 @@
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//////////////////////////////////////////////////////////////////////
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// LibFile: partitions.scad
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// Modules to help partition large objects into smaller parts that can be reassembled.
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// Cut objects with a plane, or partition them into interlocking pieces for easy printing of large objects.
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// Includes:
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// include <BOSL2/std.scad>
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// include <BOSL2/partitions.scad>
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// FileGroup: Advanced Modeling
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// FileSummary: Modules to help partition large objects into smaller assembled parts.
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// FileSummary: Cut objects with a plane or partition them into interlocking pieces.
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// FileFootnotes: STD=Included in std.scad
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//////////////////////////////////////////////////////////////////////
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// Section: Partitioning
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// Section: Planar Cutting
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// Function&Module: half_of()
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//
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// Usage: as module
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// half_of(v, [cp], [s], [planar]) ...
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// Usage: as function
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// result = half_of(p,v,[cp]);
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//
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// Description:
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// Slices an object at a cut plane, and masks away everything that is on one side. The v parameter is either a plane specification or
|
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// a normal vector. The s parameter is needed for the module
|
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// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
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// wrong half, but if it is too small it won't fully mask your model.
|
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// When called as a function, you must supply a vnf, path or region in p. If planar is set to true for the module version the operation
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// is performed in 2D and UP and DOWN are treated as equivalent to BACK and FWD respectively.
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//
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// Arguments:
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// p = path, region or VNF to slice. (Function version)
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// v = Normal of plane to slice at. Keeps everything on the side the normal points to. Default: [0,0,1] (UP)
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// cp = If given as a scalar, moves the cut plane along the normal by the given amount. If given as a point, specifies a point on the cut plane. Default: [0,0,0]
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// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
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// planar = If true, perform a 2D operation. When planar, a `v` of `UP` or `DOWN` becomes equivalent of `BACK` and `FWD` respectively. (Module version). Default: false.
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//
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// Examples:
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// half_of(DOWN+BACK, cp=[0,-10,0]) cylinder(h=40, r1=10, r2=0, center=false);
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// half_of(DOWN+LEFT, s=200) sphere(d=150);
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// Example(2D):
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// half_of([1,1], planar=true) circle(d=50);
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module half_of(v=UP, cp, s=100, planar=false)
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{
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cp = is_vector(v,4)? assert(cp==undef, "Don't use cp with plane definition.") plane_normal(v) * v[3] :
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is_vector(cp)? cp :
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is_num(cp)? cp*unit(v) :
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[0,0,0];
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v = is_vector(v,4)? plane_normal(v) : v;
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if (cp != [0,0,0]) {
|
||||
translate(cp) half_of(v=v, s=s, planar=planar) translate(-cp) children();
|
||||
} else if (planar) {
|
||||
v = (v==UP)? BACK : (v==DOWN)? FWD : v;
|
||||
ang = atan2(v.y, v.x);
|
||||
difference() {
|
||||
children();
|
||||
rotate(ang+90) {
|
||||
back(s/2) square(s, center=true);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
difference() {
|
||||
children();
|
||||
rot(from=UP, to=-v) {
|
||||
up(s/2) cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function half_of(p, v=UP, cp) =
|
||||
is_vnf(p) ?
|
||||
assert(is_vector(v) && (len(v)==3 || len(v)==4),str("Must give 3-vector or plane specification",v))
|
||||
assert(select(v,0,2)!=[0,0,0], "vector v must be nonzero")
|
||||
let(
|
||||
plane = is_vector(v,4) ? assert(cp==undef, "Don't use cp with plane definition.") v
|
||||
: is_undef(cp) ? [each v, 0]
|
||||
: is_num(cp) ? [each v, cp*(v*v)/norm(v)]
|
||||
: assert(is_vector(cp,3),"Centerpoint must be a 3-vector")
|
||||
[each v, cp*v]
|
||||
)
|
||||
vnf_halfspace(plane, p)
|
||||
: is_path(p) || is_region(p) ?
|
||||
let(
|
||||
v = (v==UP)? BACK : (v==DOWN)? FWD : v,
|
||||
cp = is_undef(cp) ? [0,0]
|
||||
: is_num(cp) ? v*cp
|
||||
: assert(is_vector(cp,2) || (is_vector(cp,3) && cp.z==0),"Centerpoint must be 2-vector")
|
||||
cp
|
||||
)
|
||||
assert(is_vector(v,2) || (is_vector(v,3) && v.z==0),"Must give 2-vector")
|
||||
assert(!all_zero(v), "Vector v must be nonzero")
|
||||
let(
|
||||
bounds = pointlist_bounds(move(-cp,p)),
|
||||
L = 2*max(flatten(bounds)),
|
||||
n = unit(v),
|
||||
u = [-n.y,n.x],
|
||||
box = [cp+u*L, cp+(v+u)*L, cp+(v-u)*L, cp-u*L]
|
||||
)
|
||||
intersection(box,p)
|
||||
: assert(false, "Input must be a region, path or VNF");
|
||||
|
||||
|
||||
|
||||
/* This code cut 3d paths but leaves behind connecting line segments
|
||||
is_path(p) ?
|
||||
//assert(len(p[0]) == d, str("path must have dimension ", d))
|
||||
let(z = [for(x=p) (x-cp)*v])
|
||||
[ for(i=[0:len(p)-1]) each concat(z[i] >= 0 ? [p[i]] : [],
|
||||
// we assume a closed path here;
|
||||
// to make this correct for an open path,
|
||||
// just replace this by [] when i==len(p)-1:
|
||||
let(j=(i+1)%len(p))
|
||||
// the remaining path may have flattened sections, but this cannot
|
||||
// create self-intersection or whiskers:
|
||||
z[i]*z[j] >= 0 ? [] : [(z[j]*p[i]-z[i]*p[j])/(z[j]-z[i])]) ]
|
||||
:
|
||||
*/
|
||||
|
||||
|
||||
// Function&Module: left_half()
|
||||
//
|
||||
// Usage: as module
|
||||
// left_half([s], [x]) ...
|
||||
// left_half(planar=true, [s], [x]) ...
|
||||
// Usage: as function
|
||||
// result = left_half(p, [x]);
|
||||
//
|
||||
// Description:
|
||||
// Slices an object at a vertical Y-Z cut plane, and masks away everything that is right of it.
|
||||
// The s parameter is needed for the module
|
||||
// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
||||
// wrong half, but if it is too small it won't fully mask your model.
|
||||
//
|
||||
// Arguments:
|
||||
// p = VNF, region or path to slice (function version)
|
||||
// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
|
||||
// x = The X coordinate of the cut-plane. Default: 0
|
||||
// planar = If true, perform a 2D operation. (Module version) Default: false.
|
||||
// Examples:
|
||||
// left_half() sphere(r=20);
|
||||
// left_half(x=-8) sphere(r=20);
|
||||
// Example(2D):
|
||||
// left_half(planar=true) circle(r=20);
|
||||
module left_half(s=100, x=0, planar=false)
|
||||
{
|
||||
dir = LEFT;
|
||||
difference() {
|
||||
children();
|
||||
translate([x,0,0]-dir*s/2) {
|
||||
if (planar) {
|
||||
square(s, center=true);
|
||||
} else {
|
||||
cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
function left_half(p,x=0) = half_of(p, LEFT, [x,0,0]);
|
||||
|
||||
|
||||
|
||||
// Function&Module: right_half()
|
||||
//
|
||||
// Usage: as module
|
||||
// right_half([s], [x]) ...
|
||||
// right_half(planar=true, [s], [x]) ...
|
||||
// Usage: as function
|
||||
// result = right_half(p, [x]);
|
||||
//
|
||||
// Description:
|
||||
// Slices an object at a vertical Y-Z cut plane, and masks away everything that is left of it.
|
||||
// The s parameter is needed for the module
|
||||
// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
||||
// wrong half, but if it is too small it won't fully mask your model.
|
||||
// Arguments:
|
||||
// p = VNF, region or path to slice (function version)
|
||||
// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
|
||||
// x = The X coordinate of the cut-plane. Default: 0
|
||||
// planar = If true, perform a 2D operation. (Module version) Default: false.
|
||||
// Examples(FlatSpin,VPD=175):
|
||||
// right_half() sphere(r=20);
|
||||
// right_half(x=-5) sphere(r=20);
|
||||
// Example(2D):
|
||||
// right_half(planar=true) circle(r=20);
|
||||
module right_half(s=100, x=0, planar=false)
|
||||
{
|
||||
dir = RIGHT;
|
||||
difference() {
|
||||
children();
|
||||
translate([x,0,0]-dir*s/2) {
|
||||
if (planar) {
|
||||
square(s, center=true);
|
||||
} else {
|
||||
cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
function right_half(p,x=0) = half_of(p, RIGHT, [x,0,0]);
|
||||
|
||||
|
||||
|
||||
// Function&Module: front_half()
|
||||
//
|
||||
// Usage:
|
||||
// front_half([s], [y]) ...
|
||||
// front_half(planar=true, [s], [y]) ...
|
||||
// Usage: as function
|
||||
// result = front_half(p, [y]);
|
||||
//
|
||||
// Description:
|
||||
// Slices an object at a vertical X-Z cut plane, and masks away everything that is behind it.
|
||||
// The s parameter is needed for the module
|
||||
// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
||||
// wrong half, but if it is too small it won't fully mask your model.
|
||||
// Arguments:
|
||||
// p = VNF, region or path to slice (function version)
|
||||
// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
|
||||
// y = The Y coordinate of the cut-plane. Default: 0
|
||||
// planar = If true, perform a 2D operation. (Module version) Default: false.
|
||||
// Examples(FlatSpin,VPD=175):
|
||||
// front_half() sphere(r=20);
|
||||
// front_half(y=5) sphere(r=20);
|
||||
// Example(2D):
|
||||
// front_half(planar=true) circle(r=20);
|
||||
module front_half(s=100, y=0, planar=false)
|
||||
{
|
||||
dir = FWD;
|
||||
difference() {
|
||||
children();
|
||||
translate([0,y,0]-dir*s/2) {
|
||||
if (planar) {
|
||||
square(s, center=true);
|
||||
} else {
|
||||
cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
function front_half(p,y=0) = half_of(p, FRONT, [0,y,0]);
|
||||
|
||||
|
||||
|
||||
// Function&Module: back_half()
|
||||
//
|
||||
// Usage:
|
||||
// back_half([s], [y]) ...
|
||||
// back_half(planar=true, [s], [y]) ...
|
||||
// Usage: as function
|
||||
// result = back_half(p, [y]);
|
||||
//
|
||||
// Description:
|
||||
// Slices an object at a vertical X-Z cut plane, and masks away everything that is in front of it.
|
||||
// The s parameter is needed for the module
|
||||
// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
||||
// wrong half, but if it is too small it won't fully mask your model.
|
||||
// Arguments:
|
||||
// p = VNF, region or path to slice (function version)
|
||||
// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
|
||||
// y = The Y coordinate of the cut-plane. Default: 0
|
||||
// planar = If true, perform a 2D operation. (Module version) Default: false.
|
||||
// Examples:
|
||||
// back_half() sphere(r=20);
|
||||
// back_half(y=8) sphere(r=20);
|
||||
// Example(2D):
|
||||
// back_half(planar=true) circle(r=20);
|
||||
module back_half(s=100, y=0, planar=false)
|
||||
{
|
||||
dir = BACK;
|
||||
difference() {
|
||||
children();
|
||||
translate([0,y,0]-dir*s/2) {
|
||||
if (planar) {
|
||||
square(s, center=true);
|
||||
} else {
|
||||
cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
function back_half(p,y=0) = half_of(p, BACK, [0,y,0]);
|
||||
|
||||
|
||||
|
||||
// Function&Module: bottom_half()
|
||||
//
|
||||
// Usage:
|
||||
// bottom_half([s], [z]) ...
|
||||
// Usage: as function
|
||||
// result = bottom_half(p, [z]);
|
||||
//
|
||||
// Description:
|
||||
// Slices an object at a horizontal X-Y cut plane, and masks away everything that is above it.
|
||||
// The s parameter is needed for the module
|
||||
// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
||||
// wrong half, but if it is too small it won't fully mask your model.
|
||||
// Arguments:
|
||||
// p = VNF, region or path to slice (function version)
|
||||
// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
|
||||
// z = The Z coordinate of the cut-plane. Default: 0
|
||||
// Examples:
|
||||
// bottom_half() sphere(r=20);
|
||||
// bottom_half(z=-10) sphere(r=20);
|
||||
module bottom_half(s=100, z=0)
|
||||
{
|
||||
dir = DOWN;
|
||||
difference() {
|
||||
children();
|
||||
translate([0,0,z]-dir*s/2) {
|
||||
cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
function bottom_half(p,z=0) = half_of(p,BOTTOM,[0,0,z]);
|
||||
|
||||
|
||||
|
||||
// Function&Module: top_half()
|
||||
//
|
||||
// Usage:
|
||||
// top_half([s], [z]) ...
|
||||
// result = top_half(p, [z]);
|
||||
//
|
||||
// Description:
|
||||
// Slices an object at a horizontal X-Y cut plane, and masks away everything that is below it.
|
||||
// The s parameter is needed for the module
|
||||
// version to control the size of the masking cube. If s is too large then the preview display will flip around and display the
|
||||
// wrong half, but if it is too small it won't fully mask your model.
|
||||
// Arguments:
|
||||
// p = VNF, region or path to slice (function version)
|
||||
// s = Mask size to use. Use a number larger than twice your object's largest axis. If you make this too large, OpenSCAD's preview rendering may display the wrong half. (Module version) Default: 100
|
||||
// z = The Z coordinate of the cut-plane. Default: 0
|
||||
// Examples(Spin,VPD=175):
|
||||
// top_half() sphere(r=20);
|
||||
// top_half(z=5) sphere(r=20);
|
||||
module top_half(s=100, z=0)
|
||||
{
|
||||
dir = UP;
|
||||
difference() {
|
||||
children();
|
||||
translate([0,0,z]-dir*s/2) {
|
||||
cube(s, center=true);
|
||||
}
|
||||
}
|
||||
}
|
||||
function top_half(p,z=0) = half_of(p,UP,[0,0,z]);
|
||||
|
||||
|
||||
|
||||
// Section: Partioning into Interlocking Pieces
|
||||
|
||||
|
||||
function _partition_subpath(type) =
|
||||
|
|
|
|||
Loading…
Reference in a new issue