X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=sewing-table.scad.m4;h=3132b11658153ebe30aa0ce3356dd20d24974bae;hp=c19b32ef83fb3651f6b4fab6573560e7a9b1cc63;hb=2cf745951f3916661e1bfeccc653643862576ccd;hpb=3a10a7dce4652ce20366019783f8130654d6960c diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index c19b32e..3132b11 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -100,6 +100,9 @@ frontcurve_side_skew = 3.5 / 72; frontcurve_avoid_y = 70; frontcurve_z_slop = 0.75; +frontcurve_strt_len = 60; +frontcurve_dualcurve_angle = 90 - 65; + // calculated TEST = false; @@ -183,6 +186,8 @@ module TileBase(botleft, topright){ crossoff = tile_hard_edge_hole_dist + POST_TCROSSSZ/2; cidsz = [ thehd[0], size[1] - 2*crossoff ]; cidszr = [ cidsz[0], min(cidsz[1], 50) ]; + translate( concat(botleft + [0, crossoff] + (cidsz-cidszr)/2, [0]) ) + Commitid_BestCount(cidszr); difference(){ mirror([0,0,1]) { translate(concat(botleft + [test_edge,test_edge], [test_tile_th])) @@ -191,11 +196,9 @@ module TileBase(botleft, topright){ cube(concat(topright_post-botleft_post, [tile_th+2])); } shufflesz = max(test_edge, tile_hard_edge_hole_dist)*2; - hull(){ // poor man's minkowski - for (xs=[-1,1]) for (ys=[-1,1]) for (zs=[-1,1]) { - translate([xs,ys,zs] * shufflesz) - Machine(); - } + minkowski(){ + MachineEnvelope(); + cube(shufflesz, center=true); } } } @@ -234,28 +237,62 @@ module RoundEdge(left_cnr, right_cnr) { } } -module RoundCornerCut(ci) { - // ci should be [this_cnr, right_cnr] - // where right_cnr is to the right (ie, anticlockwise) +m4_define(`ROUNDCORNER_VARS',` this_cnr = ci[0]; right_cnr = ci[1]; - offr= round_cnr_rad - round_edge_rad; - INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE { - difference(){ - cube(offr*2 - 0.1, center=true); - translate([offr, offr, 0]) - cylinder(center=true, h=20, r= offr); + left_cnr = ci[2]; + bigr= round_cnr_rad - round_edge_rad; + l_uvec = unitvector2d(left_cnr - this_cnr); + r_uvec = unitvector2d(right_cnr - this_cnr); + lp1 = left_cnr + clockwise2d(l_uvec) * bigr; + lp2 = this_cnr + clockwise2d(l_uvec) * bigr; + lp3 = this_cnr - clockwise2d(r_uvec) * bigr; + lp4 = right_cnr - clockwise2d(r_uvec) * bigr; + ctr = line_intersection_2d(lp1,lp2,lp3,lp4) +') + +module RoundCorner_selector(ci, adj) { + ROUNDCORNER_VARS; + echo("RCS",l_uvec,ctr); + union(){ + INREFFRAME(this_cnr, right_cnr) { + cube(bigr*2 + adj, center=true); + } + } + %translate(concat(ctr,[0])) circle(1); + if(0){ + union(){ + INREFFRAME(this_cnr, right_cnr) { +// %translate([ -bigr,-bigr,0 ]) +// cube([bigr*2 + adj, bigr*3, bigr*2]); + } + } + union(){ + INREFFRAME(this_cnr, left_cnr) { + %translate([ -bigr,-bigr,0 ]) + cube(bigr*2 + adj); + } + }} +} + +module RoundCornerCut(ci) { + // ci should be [this_cnr, right_cnr, left_cnr] + // where right_cnr is to the right (ie, anticlockwise) + ROUNDCORNER_VARS; + difference(){ + RoundCorner_selector(ci, -0.1); + INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE { + translate([bigr, bigr, 0]) + cylinder(center=true, h=20, r= bigr); } } } module RoundCornerAdd(ci) { - this_cnr = ci[0]; - right_cnr = ci[1]; - bigr = round_cnr_rad - round_edge_rad; - INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE { - intersection(){ - cube(bigr*2 + 0.1, center=true); + ROUNDCORNER_VARS; + intersection(){ + RoundCorner_selector(ci, +0.1); + INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE { translate([bigr, bigr, 0]) rotate_extrude(convexity=10, $fn=50) translate([bigr, 0]) @@ -531,6 +568,19 @@ module Machine(){ ////toplevel Machine_Curves(); } +module MachineEnvelope(){ + // used for testing + p_arm_bl = [-cutout_tile11_x, -cutout_tile01_y]; + y_arm_t = cutout_tile11_y; + p_crv_fl = p_arm_bl + [rearedge_len, -frontcurve_avoid_y]; + y_crv_b = y_arm_t + rearcurve_avoid_y; + + translate([0,0,-50]) linear_extrude(height= 100){ + translate(p_arm_bl) square([400, y_arm_t] - p_arm_bl); + translate(p_crv_fl) square([400, y_crv_b] - p_crv_fl); + } +} + function Rectangle_corners(c0, sz) = // returns the corners of a rectangle from c0 to c0+sz // if sz is positive, the corners are anticlockwise starting with c0 @@ -585,10 +635,6 @@ module FitTest_RearCurve(){ ////toplevel FitTest_general([110,0], [170,100]); } -module FitTest_FrontCurve(){ ////toplevel - FitTest_general([110,-80], [170,80]); -} - module Tile02(){ ////toplevel sz = [100,170]; c0 = tile02_tr + -sz; @@ -713,6 +759,13 @@ module Tile00(){ ////toplevel sz = [250,170]; c0 = tile01_tr + [0,-sz[1]]; c = Rectangle_corners(c0, sz); + + // the edge c[1]..c[2] needs a diagonal chunk, from c1bis to c2bis + c2bis = [ -cutout_l_end_x + rearedge_len + frontcurve_strt_len, c[2][1] ]; + c1bis = [ c[1][0], + c[2][1] - + (c[2][0] - c2bis[0]) * tan(90 - frontcurve_dualcurve_angle) ]; + cnr_posts = Rectangle_corners2posts(c); cty = cutout_tile01_y; rcy = cty + frontcurve_avoid_y; @@ -725,16 +778,53 @@ module Tile00(){ ////toplevel rcs = [R_EDGE(c,1)]; difference(){ union(){ - Rectangle_TileBase(c); - Posts(posts); - RoundEdge(R_EDGE(c,0)); - RoundEdge(R_EDGE(c,1)); - InterlockEdge(tile_01_00_cnr, c[0]); + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,0)); + RoundEdge(c[1], c1bis); + InterlockEdge(tile_01_00_cnr, c[0]); + } + RoundCornerCut(rcs); + translate([0,0,-20]) linear_extrude(height=40) { + polygon([ c1bis, c1bis + [50,0], c2bis + [50,0], c2bis ]); + } + } + RoundEdge(c1bis, c2bis); } - RoundCornerCut(rcs); Machine(); } RoundCornerAdd(rcs); + RoundCornerAdd([c1bis,c2bis,c[1]]); +} + +module FitTest_FrontCurve(){ ////toplevel + p0 = [110,-80]; + sz = [170,80]; + intersection() { + Tile00(); + translate([0,0,-8]) linear_extrude(height=18) { + translate(p0) square(sz); + } + } +} + +module RoundCornerDemo_plat(cnr){ + mirror([0,0,1]) linear_extrude(height=1) polygon(cnr); +} + +module RoundCornerDemo(){ ////toplevel + cnr = [ [0,0], [15,0], [-10,12] ]; + translate([0,25,0]) RoundCornerDemo_plat(cnr); + translate([25,0,0]) RoundCornerAdd(cnr); + translate([-25,0,0]) RoundCornerCut(cnr); + translate([0,-25,0]) RoundCorner_selector(cnr, 0); + difference(){ + RoundCornerDemo_plat(cnr); + RoundCornerCut(cnr); + } + RoundCornerAdd(cnr); } module Demo(){ ////toplevel @@ -757,3 +847,4 @@ module Demo(){ ////toplevel //Machine_Curves(); //Machine(); //FitTest(); +//MachineEnvelope();