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Revar Desmera 2023-04-04 15:59:45 -07:00
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cubetruss.scad
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@ -16,81 +16,67 @@ $cubetruss_clip_thickness = 1.6;
// Section: Cube Trusses // Section: Cube Trusses
// Function: cubetruss_dist() // Module: cubetruss()
// Synopsis: Creates a multi-cube straight cubetruss shape.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage: // Usage:
// cubetruss_dist(cubes, gaps, [size], [strut]); // cubetruss(extents, [clips], [bracing], [size], [strut], [clipthick]);
// Description: // Description:
// Function to calculate the length of a cubetruss truss. // Creates a cubetruss truss, assembled out of one or more cubical segments.
// Arguments:
// cubes = The number of cubes along the truss's length.
// gaps = The number of extra strut widths to add in, corresponding to each time a truss butts up against another.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// Topics: Trusses
function cubetruss_dist(cubes=0, gaps=0, size, strut) =
let(
size = is_undef(size)? $cubetruss_size : size,
strut = is_undef(strut)? $cubetruss_strut_size : strut
) cubes*(size-strut)+gaps*strut;
// Module: cubetruss_segment()
// Usage:
// cubetruss_segment([size], [strut], [bracing]);
// Description:
// Creates a single cubetruss cube segment.
// Arguments: // Arguments:
// extents = The number of cubes in length to make the truss. If given as a [X,Y,Z] vector, specifies the number of cubes in each dimension.
// clips = List of vectors pointing towards the sides to add clips to.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30) // size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3) // strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// bracing = If true, adds internal cross-braces. Default: `$cubetruss_bracing` (usually true) // bracing = If true, adds internal cross-braces. Default: `$cubetruss_bracing` (usually true)
// clipthick = The thickness of the clips. Default: `$cubetruss_clip_thickness` (usually 1.6)
// --- // ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER` // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0` // spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP` // orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Topics: Attachable, Trusses // Topics: Attachable, Trusses
// Examples: // Examples:
// cubetruss_segment(bracing=false); // cubetruss(extents=3);
// cubetruss_segment(bracing=true); // cubetruss(extents=3, clips=FRONT);
// cubetruss_segment(strut=4); // cubetruss(extents=3, clips=[FRONT,BACK]);
// cubetruss_segment(size=40); // cubetruss(extents=[2,3]);
module cubetruss_segment(size, strut, bracing, anchor=CENTER, spin=0, orient=UP) { // cubetruss(extents=[1,4,2]);
// cubetruss(extents=[1,4,2], bracing=false);
module cubetruss(extents=6, clips=[], bracing, size, strut, clipthick, anchor=CENTER, spin=0, orient=UP) {
clips = is_vector(clips)? [clips] : clips;
size = is_undef(size)? $cubetruss_size : size; size = is_undef(size)? $cubetruss_size : size;
strut = is_undef(strut)? $cubetruss_strut_size : strut; strut = is_undef(strut)? $cubetruss_strut_size : strut;
bracing = is_undef(bracing)? $cubetruss_bracing : bracing; bracing = is_undef(bracing)? $cubetruss_bracing : bracing;
h = size; clipthick = is_undef(clipthick)? $cubetruss_clip_thickness : clipthick;
crossthick = strut/sqrt(2); extents = is_vector(extents)? point3d(extents,fill=1) : [1,extents,1];
voffset = 0.333; w = extents[0];
attachable(anchor,spin,orient, size=[size,size,size]) { l = extents[1];
render(convexity=10) h = extents[2];
s = [cubetruss_dist(w,1), cubetruss_dist(l,1), cubetruss_dist(h,1)];
attachable(anchor,spin,orient, size=s) {
union() { union() {
difference() { for (zrow = [0:h-1]) {
// Start with a cube. up((zrow-(h-1)/2)*(size-strut)) {
cube([size, size, h], center=true); for (xcol = [0:w-1]) {
right((xcol-(w-1)/2)*(size-strut)) {
cube([size-strut*2, size-strut*2, h-strut*2], center=true); for (ycol = [0:l-1]) {
back((ycol-(l-1)/2)*(size-strut)) {
// Hollow out octogons in X and Y axes. cubetruss_segment(size=size, strut=strut, bracing=bracing);
zrot_copies([0,90]) { }
xrot(90) zrot(180/8) cylinder(h=max(h,size)+1, d=(min(h,size)-2*strut)/cos(180/8), center=true, $fn=8); }
}
}
} }
// Hollow out octogon vertically.
zrot(180/8) cylinder(h=max(h,size)+1, d=(min(h,size)-2*strut)/cos(180/8), center=true, $fn=8);
} }
if (clipthick > 0) {
// Interior cross-supports for (vec = clips) {
if (bracing) { exts = v_abs(rot(from=FWD, to=vec, p=extents));
for (i = [-1,1]) { rot(from=FWD,to=vec) {
zrot(i*45) { for (zrow = [0:1:exts.z-1]) {
difference() { up((zrow-(exts.z-1)/2)*(size-strut)) {
cube([crossthick, (size-strut)*sqrt(2), h], center=true); fwd((exts.y*(size-strut)+strut)/2) {
up(i*voffset) { cubetruss_clip(size=size, strut=strut, extents=exts.x, clipthick=clipthick);
yscale(1.3) {
yrot(90) {
zrot(180/6) {
cylinder(h=crossthick+1, d=(min(h,size)-2*strut)/cos(180/6)-2*voffset, center=true, $fn=6);
}
}
} }
} }
} }
@ -103,7 +89,86 @@ module cubetruss_segment(size, strut, bracing, anchor=CENTER, spin=0, orient=UP)
} }
// Module: cubetruss_corner()
// Synopsis: Creates a multi-cube corner cubetruss shape.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage:
// cubetruss_corner(h, extents, [bracing], [size], [strut], [clipthick]);
// Description:
// Creates a corner cubetruss with extents jutting out in one or more directions.
// Arguments:
// h = The number of cubes high to make the base and horizontal extents.
// extents = The number of cubes to extend beyond the corner. If given as a vector of cube counts, gives the number of cubes to extend right, back, left, front, and up in order. If the vector is shorter than length 5 the extra cube counts are taken to be zero.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// bracing = If true, adds internal cross-braces. Default: `$cubetruss_bracing` (usually true)
// clipthick = The thickness of the clips. Default: `$cubetruss_clip_thickness` (usually 1.6)
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Topics: Attachable, Trusses
// Examples:
// cubetruss_corner(extents=2);
// cubetruss_corner(extents=2, h=2);
// cubetruss_corner(extents=[3,3,0,0,2]);
// cubetruss_corner(extents=[3,0,3,0,2]);
// cubetruss_corner(extents=[3,3,3,3,2]);
module cubetruss_corner(h=1, extents=[1,1,0,0,1], bracing, size, strut, clipthick, anchor=CENTER, spin=0, orient=UP) {
size = is_undef(size)? $cubetruss_size : size;
strut = is_undef(strut)? $cubetruss_strut_size : strut;
bracing = is_undef(bracing)? $cubetruss_bracing : bracing;
clipthick = is_undef(clipthick)? $cubetruss_clip_thickness : clipthick;
exts = is_vector(extents)? list_pad(extents,5,fill=0) : [extents, extents, 0, 0, extents];
dummy = assert(len(exts)==5, "Input extents must be a scalar or vector with length 5 or less.");
s = [cubetruss_dist(exts[0]+1+exts[2],1), cubetruss_dist(exts[1]+1+exts[3],1), cubetruss_dist(h+exts[4],1)];
offset = [cubetruss_dist(exts[0]-exts[2],0), cubetruss_dist(exts[1]-exts[3],0), cubetruss_dist(h+exts[4]-1,0)]/2;
attachable(anchor,spin,orient, size=s, offset=offset) {
union() {
for (zcol = [0:h-1]) {
up((size-strut)*zcol) {
cubetruss_segment(size=size, strut=strut, bracing=bracing);
}
}
for (dir = [0:3]) {
if (exts[dir] != undef && exts[dir] > 0) {
zrot(dir*90) {
for (zcol = [0:h-1]) {
up((size-strut+0.01)*zcol) {
for (i = [1:exts[dir]]) {
right((size-strut+0.01)*i) cubetruss_segment(size=size, strut=strut, bracing=bracing);
}
if (clipthick > 0) {
right(exts[dir]*(size-strut)+size/2) {
zrot(90) cubetruss_clip(size=size, strut=strut, clipthick=clipthick);
}
}
}
}
}
}
}
if (exts[4] != undef && exts[4] > 0) {
for (i = [1:exts[4]]) {
up((size-strut+0.01)*(i+h-1)) cubetruss_segment(size=size, strut=strut, bracing=bracing);
}
if (clipthick > 0) {
up((exts[4]+h-1)*(size-strut)+size/2) {
xrot(-90) cubetruss_clip(size=size, strut=strut, clipthick=clipthick);
}
}
}
}
children();
}
}
// Module: cubetruss_support() // Module: cubetruss_support()
// Synopsis: Creates a cubetruss support structure shape.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage: // Usage:
// cubetruss_support([size], [strut], [extents], [anchor], [spin], [orient]) [ATTACHMENTS]; // cubetruss_support([size], [strut], [extents], [anchor], [spin], [orient]) [ATTACHMENTS];
// Description: // Description:
@ -164,72 +229,13 @@ module cubetruss_support(size, strut, extents=1, anchor=CENTER, spin=0, orient=U
} }
// Module: cubetruss_clip()
// Usage:
// cubetruss_clip(extents, [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS];
// Description:
// Creates a pair of clips to add onto the end of a truss.
// Arguments:
// extents = How many cubes to separate the clips by.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// clipthick = The thickness of the clip. Default: `$cubetruss_clip_thickness` (usually 1.6)
// ---
// $slop = allowance for printer overextrusion
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Topics: Attachable, Trusses
// Examples:
// cubetruss_clip(extents=2);
// cubetruss_clip(extents=1);
// cubetruss_clip(clipthick=2.5);
module cubetruss_clip(extents=1, size, strut, clipthick, anchor=CENTER, spin=0, orient=UP) {
size = is_undef(size)? $cubetruss_size : size;
strut = is_undef(strut)? $cubetruss_strut_size : strut;
clipthick = is_undef(clipthick)? $cubetruss_clip_thickness : clipthick;
cliplen = strut * 2.6;
clipheight = min(size+strut, size/3+2*strut*2.6);
clipsize = 0.5;
s = [extents*(size-strut)+strut+2*clipthick, strut*2, clipheight-2*strut];
attachable(anchor,spin,orient, size=s) {
xflip_copy(offset=(extents*(size-strut)+strut)/2) {
difference() {
union() {
difference() {
right(clipthick/2-0.01) {
back(strut) {
difference() {
xrot(90) prismoid([clipthick, clipheight], [clipthick, clipheight-cliplen*2], h=cliplen);
right(clipthick/2) chamfer_edge_mask(l=clipheight+0.1, chamfer=clipthick);
}
}
}
fwd(strut*3/2) {
cube([get_slop(), strut*3, size], center=true);
}
}
right(get_slop()/2+0.01) {
fwd(strut*1.25+get_slop()) {
yrot(-90) prismoid([clipheight-cliplen*2, strut/2], [clipheight-cliplen*2-2*clipsize, strut/2], h=clipsize+0.01);
}
}
}
fwd(strut*1.6) {
left(clipsize) {
yscale(1.5) chamfer_edge_mask(l=size+1, chamfer=clipsize+clipthick/3);
}
}
zcopies(clipheight-strut) cube([clipthick*3, cliplen*2, strut], center=true);
zcopies(clipheight-2*strut) right(clipthick) chamfer_edge_mask(l=cliplen*2, chamfer=clipthick, orient=BACK);
}
}
children();
}
}
// Section: Cubetruss Support
// Module: cubetruss_foot() // Module: cubetruss_foot()
// Synopsis: Creates a foot that can connect two cubetrusses.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage: // Usage:
// cubetruss_foot(w, [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS]; // cubetruss_foot(w, [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS];
// Description: // Description:
@ -307,6 +313,9 @@ module cubetruss_foot(w=1, size, strut, clipthick, anchor=CENTER, spin=0, orient
// Module: cubetruss_joiner() // Module: cubetruss_joiner()
// Synopsis: Creates a joiner that can connect two cubetrusses end-to-end.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage: // Usage:
// cubetruss_joiner([w], [vert], [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS]; // cubetruss_joiner([w], [vert], [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS];
// Description: // Description:
@ -375,6 +384,9 @@ module cubetruss_joiner(w=1, vert=true, size, strut, clipthick, anchor=CENTER, s
// Module: cubetruss_uclip() // Module: cubetruss_uclip()
// Synopsis: Creates a joiner that can connect two cubetrusses end-to-end.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage: // Usage:
// cubetruss_uclip(dual, [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS]; // cubetruss_uclip(dual, [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS];
// Description: // Description:
@ -420,126 +432,68 @@ module cubetruss_uclip(dual=true, size, strut, clipthick, anchor=CENTER, spin=0,
} }
// Module: cubetruss()
// Section: Cubetruss Primitives
// Module: cubetruss_segment()
// Synopsis: Creates a single cubetruss cube.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage: // Usage:
// cubetruss(extents, [clips], [bracing], [size], [strut], [clipthick]); // cubetruss_segment([size], [strut], [bracing]);
// Description: // Description:
// Creates a cubetruss truss, assembled out of one or more cubical segments. // Creates a single cubetruss cube segment.
// Arguments: // Arguments:
// extents = The number of cubes in length to make the truss. If given as a [X,Y,Z] vector, specifies the number of cubes in each dimension.
// clips = List of vectors pointing towards the sides to add clips to.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30) // size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3) // strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// bracing = If true, adds internal cross-braces. Default: `$cubetruss_bracing` (usually true) // bracing = If true, adds internal cross-braces. Default: `$cubetruss_bracing` (usually true)
// clipthick = The thickness of the clips. Default: `$cubetruss_clip_thickness` (usually 1.6)
// --- // ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER` // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0` // spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP` // orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Topics: Attachable, Trusses // Topics: Attachable, Trusses
// Examples: // Examples:
// cubetruss(extents=3); // cubetruss_segment(bracing=false);
// cubetruss(extents=3, clips=FRONT); // cubetruss_segment(bracing=true);
// cubetruss(extents=3, clips=[FRONT,BACK]); // cubetruss_segment(strut=4);
// cubetruss(extents=[2,3]); // cubetruss_segment(size=40);
// cubetruss(extents=[1,4,2]); module cubetruss_segment(size, strut, bracing, anchor=CENTER, spin=0, orient=UP) {
// cubetruss(extents=[1,4,2], bracing=false);
module cubetruss(extents=6, clips=[], bracing, size, strut, clipthick, anchor=CENTER, spin=0, orient=UP) {
clips = is_vector(clips)? [clips] : clips;
size = is_undef(size)? $cubetruss_size : size; size = is_undef(size)? $cubetruss_size : size;
strut = is_undef(strut)? $cubetruss_strut_size : strut; strut = is_undef(strut)? $cubetruss_strut_size : strut;
bracing = is_undef(bracing)? $cubetruss_bracing : bracing; bracing = is_undef(bracing)? $cubetruss_bracing : bracing;
clipthick = is_undef(clipthick)? $cubetruss_clip_thickness : clipthick; h = size;
extents = is_vector(extents)? point3d(extents,fill=1) : [1,extents,1]; crossthick = strut/sqrt(2);
w = extents[0]; voffset = 0.333;
l = extents[1]; attachable(anchor,spin,orient, size=[size,size,size]) {
h = extents[2]; render(convexity=10)
s = [cubetruss_dist(w,1), cubetruss_dist(l,1), cubetruss_dist(h,1)];
attachable(anchor,spin,orient, size=s) {
union() { union() {
for (zrow = [0:h-1]) { difference() {
up((zrow-(h-1)/2)*(size-strut)) { // Start with a cube.
for (xcol = [0:w-1]) { cube([size, size, h], center=true);
right((xcol-(w-1)/2)*(size-strut)) {
for (ycol = [0:l-1]) {
back((ycol-(l-1)/2)*(size-strut)) {
cubetruss_segment(size=size, strut=strut, bracing=bracing);
}
}
}
}
}
}
if (clipthick > 0) {
for (vec = clips) {
exts = v_abs(rot(from=FWD, to=vec, p=extents));
rot(from=FWD,to=vec) {
for (zrow = [0:1:exts.z-1]) {
up((zrow-(exts.z-1)/2)*(size-strut)) {
fwd((exts.y*(size-strut)+strut)/2) {
cubetruss_clip(size=size, strut=strut, extents=exts.x, clipthick=clipthick);
}
}
}
}
}
}
}
children();
}
}
cube([size-strut*2, size-strut*2, h-strut*2], center=true);
// Module: cubetruss_corner() // Hollow out octogons in X and Y axes.
// Usage: zrot_copies([0,90]) {
// cubetruss_corner(h, extents, [bracing], [size], [strut], [clipthick]); xrot(90) zrot(180/8) cylinder(h=max(h,size)+1, d=(min(h,size)-2*strut)/cos(180/8), center=true, $fn=8);
// Description:
// Creates a corner cubetruss with extents jutting out in one or more directions.
// Arguments:
// h = The number of cubes high to make the base and horizontal extents.
// extents = The number of cubes to extend beyond the corner. If given as a vector of cube counts, gives the number of cubes to extend right, back, left, front, and up in order. If the vector is shorter than length 5 the extra cube counts are taken to be zero.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// bracing = If true, adds internal cross-braces. Default: `$cubetruss_bracing` (usually true)
// clipthick = The thickness of the clips. Default: `$cubetruss_clip_thickness` (usually 1.6)
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Topics: Attachable, Trusses
// Examples:
// cubetruss_corner(extents=2);
// cubetruss_corner(extents=2, h=2);
// cubetruss_corner(extents=[3,3,0,0,2]);
// cubetruss_corner(extents=[3,0,3,0,2]);
// cubetruss_corner(extents=[3,3,3,3,2]);
module cubetruss_corner(h=1, extents=[1,1,0,0,1], bracing, size, strut, clipthick, anchor=CENTER, spin=0, orient=UP) {
size = is_undef(size)? $cubetruss_size : size;
strut = is_undef(strut)? $cubetruss_strut_size : strut;
bracing = is_undef(bracing)? $cubetruss_bracing : bracing;
clipthick = is_undef(clipthick)? $cubetruss_clip_thickness : clipthick;
exts = is_vector(extents)? list_pad(extents,5,fill=0) : [extents, extents, 0, 0, extents];
dummy = assert(len(exts)==5, "Input extents must be a scalar or vector with length 5 or less.");
s = [cubetruss_dist(exts[0]+1+exts[2],1), cubetruss_dist(exts[1]+1+exts[3],1), cubetruss_dist(h+exts[4],1)];
offset = [cubetruss_dist(exts[0]-exts[2],0), cubetruss_dist(exts[1]-exts[3],0), cubetruss_dist(h+exts[4]-1,0)]/2;
attachable(anchor,spin,orient, size=s, offset=offset) {
union() {
for (zcol = [0:h-1]) {
up((size-strut)*zcol) {
cubetruss_segment(size=size, strut=strut, bracing=bracing);
} }
// Hollow out octogon vertically.
zrot(180/8) cylinder(h=max(h,size)+1, d=(min(h,size)-2*strut)/cos(180/8), center=true, $fn=8);
} }
for (dir = [0:3]) {
if (exts[dir] != undef && exts[dir] > 0) { // Interior cross-supports
zrot(dir*90) { if (bracing) {
for (zcol = [0:h-1]) { for (i = [-1,1]) {
up((size-strut+0.01)*zcol) { zrot(i*45) {
for (i = [1:exts[dir]]) { difference() {
right((size-strut+0.01)*i) cubetruss_segment(size=size, strut=strut, bracing=bracing); cube([crossthick, (size-strut)*sqrt(2), h], center=true);
} up(i*voffset) {
if (clipthick > 0) { yscale(1.3) {
right(exts[dir]*(size-strut)+size/2) { yrot(90) {
zrot(90) cubetruss_clip(size=size, strut=strut, clipthick=clipthick); zrot(180/6) {
cylinder(h=crossthick+1, d=(min(h,size)-2*strut)/cos(180/6)-2*voffset, center=true, $fn=6);
}
} }
} }
} }
@ -547,15 +501,73 @@ module cubetruss_corner(h=1, extents=[1,1,0,0,1], bracing, size, strut, clipthic
} }
} }
} }
if (exts[4] != undef && exts[4] > 0) { }
for (i = [1:exts[4]]) { children();
up((size-strut+0.01)*(i+h-1)) cubetruss_segment(size=size, strut=strut, bracing=bracing); }
} }
if (clipthick > 0) {
up((exts[4]+h-1)*(size-strut)+size/2) {
xrot(-90) cubetruss_clip(size=size, strut=strut, clipthick=clipthick); // Module: cubetruss_clip()
// Synopsis: Creates a clip for the end of a cubetruss to snap-lock it to another cubetruss.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage:
// cubetruss_clip(extents, [size], [strut], [clipthick], [$slop=], [anchor=], [spin=], [orient=]) [ATTACHMENTS];
// Description:
// Creates a pair of clips to add onto the end of a truss.
// Arguments:
// extents = How many cubes to separate the clips by.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// clipthick = The thickness of the clip. Default: `$cubetruss_clip_thickness` (usually 1.6)
// ---
// $slop = allowance for printer overextrusion
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Topics: Attachable, Trusses
// Examples:
// cubetruss_clip(extents=2);
// cubetruss_clip(extents=1);
// cubetruss_clip(clipthick=2.5);
module cubetruss_clip(extents=1, size, strut, clipthick, anchor=CENTER, spin=0, orient=UP) {
size = is_undef(size)? $cubetruss_size : size;
strut = is_undef(strut)? $cubetruss_strut_size : strut;
clipthick = is_undef(clipthick)? $cubetruss_clip_thickness : clipthick;
cliplen = strut * 2.6;
clipheight = min(size+strut, size/3+2*strut*2.6);
clipsize = 0.5;
s = [extents*(size-strut)+strut+2*clipthick, strut*2, clipheight-2*strut];
attachable(anchor,spin,orient, size=s) {
xflip_copy(offset=(extents*(size-strut)+strut)/2) {
difference() {
union() {
difference() {
right(clipthick/2-0.01) {
back(strut) {
difference() {
xrot(90) prismoid([clipthick, clipheight], [clipthick, clipheight-cliplen*2], h=cliplen);
right(clipthick/2) chamfer_edge_mask(l=clipheight+0.1, chamfer=clipthick);
}
}
}
fwd(strut*3/2) {
cube([get_slop(), strut*3, size], center=true);
}
}
right(get_slop()/2+0.01) {
fwd(strut*1.25+get_slop()) {
yrot(-90) prismoid([clipheight-cliplen*2, strut/2], [clipheight-cliplen*2-2*clipsize, strut/2], h=clipsize+0.01);
}
} }
} }
fwd(strut*1.6) {
left(clipsize) {
yscale(1.5) chamfer_edge_mask(l=size+1, chamfer=clipsize+clipthick/3);
}
}
zcopies(clipheight-strut) cube([clipthick*3, cliplen*2, strut], center=true);
zcopies(clipheight-2*strut) right(clipthick) chamfer_edge_mask(l=cliplen*2, chamfer=clipthick, orient=BACK);
} }
} }
children(); children();
@ -563,5 +575,26 @@ module cubetruss_corner(h=1, extents=[1,1,0,0,1], bracing, size, strut, clipthic
} }
// Function: cubetruss_dist()
// Synopsis: Returns the length of a cubetruss truss.
// Topics: Trusses, CubeTruss, FDM Optimized, Parts
// See Also: cubetruss_segment(), cubetruss_support(), cubetruss(), cubetruss_corner()
// Usage:
// cubetruss_dist(cubes, gaps, [size], [strut]);
// Description:
// Function to calculate the length of a cubetruss truss.
// Arguments:
// cubes = The number of cubes along the truss's length.
// gaps = The number of extra strut widths to add in, corresponding to each time a truss butts up against another.
// size = The length of each side of the cubetruss cubes. Default: `$cubetruss_size` (usually 30)
// strut = The width of the struts on the cubetruss cubes. Default: `$cubetruss_strut_size` (usually 3)
// Topics: Trusses
function cubetruss_dist(cubes=0, gaps=0, size, strut) =
let(
size = is_undef(size)? $cubetruss_size : size,
strut = is_undef(strut)? $cubetruss_strut_size : strut
) cubes*(size-strut)+gaps*strut;
// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap // vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap