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Merge pull request #1394 from adrianVmariano/master
path sweep end anchors
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Revar Desmera
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@@ -2764,16 +2764,46 @@ function reorient(
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// See Also: reorient(), attachable()
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// Usage:
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// a = named_anchor(name, pos, [orient], [spin]);
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// a = named_anchor(name, [pos], rot=, [flip=]);
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// Description:
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// Creates an anchor data structure. For a step-by-step explanation of attachments,
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// Creates an anchor data structure. You can specify the position, orient direction and spin directly.
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// Alternatively for the 3D case you can give a 4x4 rotation matrix which can specify the orient and spin, and optionally
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// the position, using a translation component of the matrix. If you specify `pos` along with `rot` then the position you
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// give overrides any translation included in `rot`. For a step-by-step explanation of attachments,
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// see the [Attachments Tutorial](Tutorial-Attachments).
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// Arguments:
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// name = The string name of the anchor. Lowercase. Words separated by single dashes. No spaces.
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// pos = The [X,Y,Z] position of the anchor.
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// orient = A vector pointing in the direction parts should project from the anchor position. Default: UP
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// spin = If needed, the angle to rotate the part around the direction vector. Default: 0
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function named_anchor(name, pos, orient=UP, spin=0) = [name, pos, orient, spin];
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// ---
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// rot = A 4x4 rotations matrix, which may include a translation
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// flip = If true, flip the anchor the opposite direction. Default: false
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function named_anchor(name, pos, orient, spin, rot, flip) =
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assert(num_defined([orient,spin])==0 || num_defined([rot,flip])==0, "Cannot mix orient or spin with rot or flip")
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assert(num_defined([pos,rot])>0, "Must give pos or rot")
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is_undef(rot) ? [name, pos, default(orient,UP), default(spin,0)]
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:
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let(
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flip = default(flip,false),
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pos = default(pos,apply(rot,CTR)),
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rotpart = _force_rot(rot),
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dummy = assert(approx(det4(rotpart),1), "Input rotation is not a rotation matrix"),
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dir = flip ? apply(rotpart,DOWN)
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: apply(rotpart,UP),
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rot = flip? affine3d_rot_by_axis(apply(rotpart,BACK),180)*rot
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: rot,
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decode=rot_decode(rot(to=UP,from=dir)*_force_rot(rot)),
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spin = decode[0]*sign(decode[1].z)
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)
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[name, pos, dir, spin];
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function _force_rot(T) =
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[for(i=[0:3])
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[for(j=[0:3]) j<3 ? T[i][j] :
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i==3 ? 1
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: 0]];
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// Function: attach_geom()
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// Synopsis: Returns the internal geometry description of an attachable object.
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@@ -3202,7 +3232,6 @@ function _attach_transform(anchor, spin, orient, geom, p) =
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assert(is_undef(orient) || is_vector(orient,3), str("Got: ",orient))
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let(
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anchor = default(anchor, CENTER),
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spin = default(spin, 0),
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orient = default(orient, UP),
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two_d = _attach_geom_2d(geom),
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@@ -3210,12 +3239,13 @@ function _attach_transform(anchor, spin, orient, geom, p) =
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let(
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anch = _find_anchor($attach_to, geom),
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pos = anch[1]
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) two_d? (
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assert(two_d && is_num(spin))
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affine3d_zrot(spin) *
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rot(to=FWD, from=point3d(anch[2])) *
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affine3d_translate(point3d(-pos))
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) : (
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)
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two_d?
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assert(is_num(spin))
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affine3d_zrot(spin)
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* rot(to=FWD, from=point3d(anch[2]))
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* affine3d_translate(point3d(-pos))
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:
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assert(is_num(spin) || is_vector(spin,3))
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let(
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ang = vector_angle(anch[2], DOWN),
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@@ -3223,40 +3253,33 @@ function _attach_transform(anchor, spin, orient, geom, p) =
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ang2 = (anch[2]==UP || anch[2]==DOWN)? 0 : 180-anch[3],
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axis2 = rot(p=axis,[0,0,ang2])
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)
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affine3d_rot_by_axis(axis2,ang) * (
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is_num(spin)? affine3d_zrot(ang2+spin) : (
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affine3d_zrot(spin.z) *
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affine3d_yrot(spin.y) *
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affine3d_xrot(spin.x) *
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affine3d_zrot(ang2)
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)
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) * affine3d_translate(point3d(-pos))
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)
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affine3d_rot_by_axis(axis2,ang)
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* (is_num(spin)? affine3d_zrot(ang2+spin)
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: affine3d_zrot(spin.z) * affine3d_yrot(spin.y) * affine3d_xrot(spin.x)
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* affine3d_zrot(ang2))
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* affine3d_translate(point3d(-pos))
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) : (
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let(
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pos = _find_anchor(anchor, geom)[1]
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) two_d? (
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assert(two_d && is_num(spin))
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affine3d_zrot(spin) *
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affine3d_translate(point3d(-pos))
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) : (
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)
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two_d?
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assert(is_num(spin))
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affine3d_zrot(spin) * affine3d_translate(point3d(-pos))
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:
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assert(is_num(spin) || is_vector(spin,3))
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let(
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axis = vector_axis(UP,orient),
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ang = vector_angle(UP,orient)
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)
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affine3d_rot_by_axis(axis,ang) * (
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is_num(spin)? affine3d_zrot(spin) : (
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affine3d_zrot(spin.z) *
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affine3d_yrot(spin.y) *
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affine3d_xrot(spin.x)
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)
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) * affine3d_translate(point3d(-pos))
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)
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affine3d_rot_by_axis(axis,ang)
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* ( is_num(spin)? affine3d_zrot(spin)
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: affine3d_zrot(spin.z) * affine3d_yrot(spin.y) * affine3d_xrot(spin.x))
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* affine3d_translate(point3d(-pos))
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)
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) is_undef(p)? m :
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is_vnf(p)? [(p==EMPTY_VNF? p : apply(m, p[0])), p[1]] :
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apply(m, p);
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)
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is_undef(p)? m
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: is_vnf(p) && p==EMPTY_VNF? p
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: apply(m, p);
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function _get_cp(geom) =
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