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https://github.com/BelfrySCAD/BOSL2.git
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fix anchor bug for non-orthogonal spins
change regular_prism side face anchors to point UP
This commit is contained in:
Adrian Mariano
parent
9ac540e03d
commit
51fbe696b1
3 changed files with 57 additions and 50 deletions
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@ -3180,12 +3180,12 @@ function attach_geom(
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assert(is_list(anchors))
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assert(is_bool(two_d))
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assert(is_vector(axis))
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let(
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over_f = is_undef(override) ? function(anchor) [undef,undef,undef]
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: is_func(override) ? override
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: function(anchor) _local_struct_val(override,anchor)
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)
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!is_undef(size)? (
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let(
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over_f = is_undef(override) ? function(anchor) [undef,undef,undef]
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: is_func(override) ? override
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: function(anchor) _local_struct_val(override,anchor)
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)
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two_d? (
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let(
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size2 = default(size2, size.x),
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@ -3208,8 +3208,8 @@ function attach_geom(
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) : !is_undef(vnf)? (
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assert(is_vnf(vnf))
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assert(two_d == false)
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extent? ["vnf_extent", vnf, cp, offset, anchors] :
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["vnf_isect", vnf, cp, offset, anchors]
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extent? ["vnf_extent", vnf, over_f, cp, offset, anchors]
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: ["vnf_isect", vnf, over_f, cp, offset, anchors]
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) : !is_undef(region)? (
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assert(is_region(region),2)
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let( l = default(l, h) )
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@ -3467,32 +3467,32 @@ function _attach_transform(anchor, spin, orient, geom, p) =
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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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m = ($attach_to != undef)? ( // $attach_to is the attachment point on this object
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let( // which will attach to the parent
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anch = _find_anchor($attach_to, geom),
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// if $anchor_override is set it defines the object position anchor (but note not direction or spin).
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// Otherwise we use the provided anchor for the object.
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pos = is_undef($anchor_override) ? anch[1]
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: _find_anchor(_make_anchor_legal($anchor_override,geom),geom)[1]
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)
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two_d?
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assert(is_num(spin))
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/*affine3d_zrot(spin) * */
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rot(to=FWD, from=point3d(anch[2]))
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* affine3d_translate(point3d(-pos))
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:
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let(
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ang = vector_angle(anch[2], DOWN), // anch[2] is the anchor direction vector
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axis = vector_axis(anch[2], DOWN),
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ang2 = (anch[2]==UP || anch[2]==DOWN)? 0 : 180-anch[3],
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axis2 = rot(p=axis,[0,0,ang2])
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)
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affine3d_rot_by_axis(axis2,ang)
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* (is_num(spin)? affine3d_zrot(ang2+spin)
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: affine3d_zrot(spin.z) * affine3d_yrot(spin.y) * affine3d_xrot(spin.x)
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* affine3d_zrot(ang2))
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* affine3d_translate(point3d(-pos))
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) : (
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m = ($attach_to != undef) ? // $attach_to is the attachment point on this object
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( // which will attach to the parent
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let(
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anch = _find_anchor($attach_to, geom),
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// if $anchor_override is set it defines the object position anchor (but note not direction or spin).
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// Otherwise we use the provided anchor for the object.
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pos = is_undef($anchor_override) ? anch[1]
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: _find_anchor(_make_anchor_legal($anchor_override,geom),geom)[1]
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)
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two_d?
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assert(is_num(spin))
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affine3d_zrot(spin)
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* rot(to=FWD, from=point3d(anch[2]))
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* affine3d_translate(point3d(-pos))
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:
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let(
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spinT = is_num(spin) ? affine3d_zrot(-anch[3]-spin)
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: affine3d_zrot(-spin.z) * affine3d_yrot(-spin.y) * affine3d_xrot(-spin.x)
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* affine3d_zrot(-anch[3])
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)
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affine3d_yrot(180)
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* spinT
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* rot(from=anch[2],to=UP)
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* affine3d_translate(point3d(-pos))
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)
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:
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let(
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anchor = is_undef($attach_alignment) ? anchor
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: two_d? _make_anchor_legal(zrot(-spin,$attach_alignment),geom)
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@ -3503,7 +3503,6 @@ function _attach_transform(anchor, spin, orient, geom, p) =
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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), // Returns BACK if orient is UP
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ang = vector_angle(UP,orient)
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@ -3512,7 +3511,6 @@ function _attach_transform(anchor, spin, orient, geom, p) =
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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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)
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is_undef(p)? m
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: is_vnf(p) && p==EMPTY_VNF? p
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@ -3681,8 +3679,11 @@ function _find_anchor(anchor, geom) =
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vec = unit(v_mul(r,anchor),UP)
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) [anchor, pos, vec, oang]
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) : type == "vnf_isect"? ( //vnf
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let( vnf=geom[1] )
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approx(anchor,CTR)? [anchor, cp, UP, 0] : // CENTER anchors anchor on cp, "origin" anchors on [0,0]
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let(
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vnf=geom[1],
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override = geom[2](anchor)
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) // CENTER anchors anchor on cp, "origin" anchors on [0,0]
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approx(anchor,CTR)? [anchor, default(override[0],cp),default(override[1],UP),default(override[2], 0)] :
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vnf==EMPTY_VNF? [anchor, [0,0,0], unit(anchor), 0] :
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let(
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eps = 1/2048,
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@ -3729,10 +3730,13 @@ function _find_anchor(anchor, geom) =
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n = unit(sum(unorms)),
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oang = approx(point2d(n), [0,0])? 0 : atan2(n.y, n.x) + 90
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)
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[anchor, pos, n, oang]
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[anchor, default(override[0],pos),default(override[1], n),default(override[2], oang)]
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) : type == "vnf_extent"? ( //vnf
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let( vnf=geom[1] )
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approx(anchor,CTR)? [anchor, cp, UP, 0] : // CENTER anchors anchor on cp, "origin" anchors on [0,0]
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let(
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vnf=geom[1],
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override = geom[2](anchor)
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) // CENTER anchors anchor on cp, "origin" anchors on [0,0]
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approx(anchor,CTR)? [anchor, default(override[0],cp),default(override[1],UP),default(override[2], 0)] :
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vnf==EMPTY_VNF? [anchor, [0,0,0], unit(anchor,UP), 0] :
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let(
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rpts = apply(rot(from=anchor, to=RIGHT) * move(point3d(-cp)), vnf[0]),
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@ -3741,7 +3745,7 @@ function _find_anchor(anchor, geom) =
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avep = sum(select(rpts,idxs))/len(idxs),
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mpt = approx(point2d(anchor),[0,0])? [maxx,0,0] : avep,
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pos = point3d(cp) + rot(from=RIGHT, to=anchor, p=mpt)
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) [anchor, pos, anchor, oang]
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) [anchor, default(override[0],pos),default(override[1],anchor),default(override[2],oang)]
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) : type == "trapezoid"? ( //size, size2, shift, override
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let(all_comps_good = [for (c=anchor) if (c!=sign(c)) 1]==[])
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assert(all_comps_good, "All components of an anchor for a rectangle/trapezoid must be -1, 0, or 1")
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@ -873,12 +873,12 @@ function octahedron(size=1, anchor=CENTER, spin=0, orient=UP) =
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// different `$fn` than the number of prism faces, you can apply texture to the flat faces without forcing a high facet count,
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// anchors are located on the true object instead of the ideal cylinder and you can anchor to the edges and faces.
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// Named Anchors:
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// "edge0", "edge1", etc. = Center of each side edge
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// "face0", "face1", etc. = Center of each side face
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// "topedge0", "topedge1", etc = Center of each top edge, pointing in direction of associated side face
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// "botedge0", "botedge1", etc = Center of each bottom edge, pointing in direction of associated side face
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// "topcorner0", "topcorner1", etc = Top corner, pointing in direction of associated edge anchor
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// "botcorner0", "botcorner1", etc = Bottom corner, pointing in direction of associated edge anchor
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// "edge0", "edge1", etc. = Center of each side edge, spin pointing up along the edge
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// "face0", "face1", etc. = Center of each side face, spin pointing up
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// "topedge0", "topedge1", etc = Center of each top edge, pointing in direction of associated side face, spin up
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// "botedge0", "botedge1", etc = Center of each bottom edge, pointing in direction of associated side face, spin up
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// "topcorner0", "topcorner1", etc = Top corner, pointing in direction of associated edge anchor, spin up along associated edge
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// "botcorner0", "botcorner1", etc = Bottom corner, pointing in direction of associated edge anchor, spin up along associated edge
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// Arguments:
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// l / h / length / height = Length of prism
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// r = Outer radius of prism.
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@ -1162,7 +1162,8 @@ function regular_prism(n,
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Mface = skmat*zrot(-(i+1/2)*360/n),
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faceedge = faces[i][1],
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facenormal = faces[i][0],
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facespin = _compute_spin(facenormal, faceedge),
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//facespin = _compute_spin(facenormal, faceedge), // spin along centerline of face instea of pointing up---seems to be wrong choice
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facespin = _compute_spin(facenormal, UP),
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edgenormal = unit(vector_bisect(facenormal,select(faces,i-1)[0])),
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Medge = skmat*zrot(-i*360/n),
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edge = faces[i][2],
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@ -1179,7 +1180,9 @@ function regular_prism(n,
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],
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override = approx(shift,[0,0]) ? undef : [[UP, [point3d(shift,height/2), UP]]]
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)
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[reorient(anchor,spin,orient, vnf=ovnf, p=ovnf,anchors=anchors, override=override),anchors,override];
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[reorient(anchor,spin,orient, vnf=ovnf, p=ovnf,anchors=anchors, override=override),anchors,override];
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// Module: rect_tube()
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2
vnf.scad
2
vnf.scad
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@ -1055,7 +1055,7 @@ function _slice_3dpolygons(polys, dir, cuts) =
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// Arguments:
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// vnf = A VNF structure, or list of VNF structures.
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// convexity = Max number of times a line could intersect a wall of the shape.
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// cp = Centerpoint for determining intersection anchors or centering the shape. Determintes the base of the anchor vector. Can be "centroid", "mean", "box" or a 3D point. Default: "centroid"
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// cp = Centerpoint for determining intersection anchors or centering the shape. Determines the base of the anchor vector. Can be "centroid", "mean", "box" or a 3D point. Default: "centroid"
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `"origin"`
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// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
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// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
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