X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=fairphone-case.scad;h=5da56cfc67249d818ce2208a3292dcd279960b7f;hb=29b27557a1a213096b515fafba33e2cf15fff5e0;hp=5ade84ab54bbd576d04d2a6381669717bc76789c;hpb=364b586a023bc57aa5f485fcc3f73b5d98ba9234;p=reprap-play.git diff --git a/fairphone-case.scad b/fairphone-case.scad index 5ade84a..5da56cf 100644 --- a/fairphone-case.scad +++ b/fairphone-case.scad @@ -119,10 +119,11 @@ prop_main_th = 3; prop_taper_len = 6; prop_main_width = 3; prop_side_gap = 0.75; // each side +prop_lidrecess_behind = 0.75; prop_caserecess_behind = 0.75; -prop_caserecess_taper = 0.35; // one side only +prop_caserecess_taper = 0.45; // one side only prop_prop_gap = 0.5; -prop_prong_heel_slope = 1.0; +prop_prong_heel_slope = 0.5; // ---------- calculated ---------- @@ -262,8 +263,6 @@ prcp2 = [ epp4[0] + prop_buildout_less, prop_caserecess_buildout_r = -1; // prcp2[0] - epp2o[0]; -echo(prc_r3); - prcp1 = [ epp2o[0], epp2i[1] - prc_r3 ]; @@ -272,12 +271,16 @@ prcp1 = [ epp2o[0], prl_r10 = prop_end_dia/2; prl_r10o = prl_r10 + prop_recess_slop; -prlp10 = lpp10 + [1,1] * prl_r10a; +prlp10 = lpp10 + [1,1] * prl_r10o + + [1,0] * prop_lidrecess_behind + + [0,1] * prop_recess_under; // prop -prpp10 = [0,0]; -prpp11 = [0, prop_taper_len]; +$prpp10 = [0,0]; +$prpp11 = [0, prop_taper_len]; + +$prp_r10 = prl_r10; // ---------- modules ---------- @@ -619,68 +622,102 @@ module CaseBase(){ EdgeProfile(); } -module PropProfile(gamma, cut=0){ ////toplevel +function prop_x(gamma) = hp_k / (2 * sin(gamma/2)) - hppT[0]; + +module PropProfileAssignments(gamma){ // https://en.wikipedia.org/wiki/Solution_of_triangles#Two_sides_and_the_included_angle_given_(SAS) + x = prop_x(gamma); p = phone_height - prlp10[0] - hppB[0]; - x = k / (2 * sin(gamma/2)) - hppT[0]; b = p + x; - q = phone_height - hppT[0]; // prpp7[0] is 0 by definition + q = phone_height - hppT[0]; // $prpp7[0] is 0 by definition a = q + x; c = sqrt(a*a + b*b - 2*a*b*cos(gamma)); - alpha = acos( (b*b + c*c - a*a) / (2*b*c) ); + $prp_alpha = acos( (b*b + c*c - a*a) / (2*b*c) ); + + $prp_theta = 90 - $prp_alpha; + beta = 180 - $prp_alpha - gamma; + psi = 90 - beta; - theta = 90 - alpha; - beta = 180 - alpha - gamma; - psi = 90 - beta + atan(prop_caserecess_taper); - prpv1 = [ sin(psi), cos(psi) ]; + //echo("abc", a,b,c); - prpp7 = [0, c + (lpp13[1] - prpp10[1]) ]; + v1 = [ [ cos(psi), -sin(psi) ], // x + [ sin(psi), cos(psi) ] ]; // y - prp_r1 = prc_r1; - prp_r11 = prp_main_th/2; + $prpp7 = [0, c + (lpp13[1] - $prpp10[1] - hp_k) ]; - prpp1 = prpp7 + [1,0] * + $prp_r1 = prc_r1; + $prp_r11 = prop_main_th/2; + + $prpp1 = $prpp7 + [1,0] * // this is approximate, but will do - (prop_main_th/2 + prop_prop_gap + prcp1[0] - prcp1[1]); - prpp3 = prpp1 + [ -prp_r1, - (prcp2[1] - prcp1[1]) - prop_prop_gap ]; - prpp4 = [ prop_main_th/2, prpp3[1] ]; - prp_r5 = prop_end_dia/2; - prpp5 = [ prpp1[0], prpp3[1] - prop_prong_h + prp_r5 ]; - prpp6 = prpp4 + [0,-1] * (prop_prong_h + - prop_prong_heel_slope * (prpp5[0] - prpp4[0])); - prp_r8 = prop_main_th/2; - prpp8 = prpp4 + [0,-1] * prp_r8; - prpp9 = prpp8 + [-1,0] * prp_r8; - prpp12 = prpp3 + [0,1] * prop_end_dia; - - if (!cut) { - hull(){ - translate(prpp8) - intersection(){ - circle(prp_r8); - rectfromto([-20,-0], [20,20]); - } - rectfromto(prpp6, prpp9); - circleat(prpp5, prp_r5); - rectfromto(prpp12 + [0,-0.1], prpp3); - } - hull(){ - circleat(prpp1, prp_r1); - rectfromto(prpp12 + [0,-0.1], prpp3); + (prop_main_th/2 + prop_prop_gap + prcp1[0] - epp4[0]); + $prpp3 = $prpp1 + + v1[0] * -$prp_r1 + + v1[1] * ((prcp2[1] - prcp1[1]) - prop_prop_gap); + $prpp12 = $prpp3 + v1[0] * + (prop_end_dia + prop_caserecess_taper * ($prpp1[1] - $prpp3[1])); + $prp_r8 = prop_main_th; + $prpp4 = [ prop_main_th/2, $prpp3[1] ]; + $prp_r5 = $prp_r8; + $prpp5 = [ $prpp12[0] - $prp_r5, + $prpp3[1] - prop_prong_h + $prp_r5 ]; + $prpp6 = $prpp4 + [0,-1] * (prop_prong_h + + prop_prong_heel_slope * ($prpp5[0] - $prpp4[0])); + $prpp8 = $prpp4 + [0,-1] * $prp_r8; + $prpp9 = $prpp8 + [-1,0] * $prp_r8; + + children(); +} + +module PropProfile(gamma, cut=0, rot=0){ ////toplevel + PropProfileAssignments(gamma){ + + //#circleat($prpp3,1); + //#circleat($prpp12,1); + + if (!cut) { + hull(){ + translate($prpp8) + intersection(){ + circle($prp_r8); + polygon([[-20,-0], [0,0], [20,20]]); + } + rectfromto($prpp6, $prpp9); + translate($prpp5) intersection(){ + circle($prp_r5); + polygon([[-10,-10], [0,0], [10,0]]); + } + rectfromto($prpp12 + [0,-0.1], $prpp3); + } + hull(){ + circleat($prpp1, $prp_r1); + rectfromto($prpp12 + [0,-0.1], $prpp3); + } } - } - rotate([0,0, cut ? -theta : 0]){ - hull(){ - extra = cut ? prop_recess_slop : 0; - rectfromto(prpp6, prpp9); - circleat(prpp11, prp_r11 + extra); - circleat(prpp10, prp_r10 + extra); + // main shaft + rotate([0,0, rot*-$prp_theta]){ + hull(){ + extra = cut ? prop_recess_slop : 0; + rectfromto($prpp6, $prpp9); + circleat($prpp11, $prp_r11 + extra); + circleat($prpp10, $prp_r10 + extra); + } } } } +module PropAggregateProfile(){ + for (angle = prop_angles) + PropProfile(angle, 0,0); +} + +module Prop(){ ////toplevel + hw = prop_main_width/2; + linextr(-hw, +hw) + PropAggregateProfile(); +} + module Case(){ ////toplevel difference(){ union(){ @@ -826,6 +863,15 @@ module Lid(){ ////toplevel // screw holes in the hinge arms HingeScrews(); + + // prop recess + translate([prop_x_pos, -prlp10[0], prlp10[1]]) + rotate([90,0,90]) + linextr(-prop_recess_hw, +prop_recess_hw) + mirror([1,0]) + hull() + for (pa = prop_angles) + PropProfile(pa, 1,1); } } @@ -954,19 +1000,6 @@ module LidPrint(){ ////toplevel Lid(); } -module TestSelectPropRecesses(posns){ - linextr(-100,100){ - translate([phone_width/2, -phone_height]){ - square([ 3, 500 ], center=true); - for (y=posns) - hull() - for (dy=[ -prp5[0], -prp2[0] ]) - translate([0,y+dy]) - square([prop_main_width+5, 5], center=true); - } - } -} - module TestSelectFrame(){ include = [1,-1] * (epp2i[0] + 4); @@ -980,7 +1013,6 @@ module TestSelectFrame(){ module TestSelectLidFrame(){ TestSelectFrame(); - TestSelectPropRecesses(prop_lid_posns); } module TestFrameCase(){ ////toplevel @@ -1023,6 +1055,48 @@ module HingeScrews(){ } } +module DemoPropAngleSelect(c){ + color(c) difference(){ + union(){ children(); } + translate([ prop_x_pos, -400, -200 ]) + cube([ 400,800,400 ]); + } +} + +module DemoPropAngle(ang){ + hL = [0, -(phone_height - hppT[0]), hppT[1] - hp_k*2]; + hC = [0, -(phone_height - hppB[0]), hppB[1]]; + + translate(hL) + rotate([ang/2,0,0]) + translate(-hL) + translate(hC) + rotate([ang/2,0,0]) + translate(-hC) { + DemoPropAngleSelect("red") Case(); + + color("orange") + translate([prop_x_pos, -prcp1[0], prcp1[1]]) + PropProfileAssignments(ang) { + echo($prpp1); + rotate([-$prp_theta, 0, 0]) + translate([0, $prpp1[0], -$prpp1[1]]) + rotate([90,0,-90]) + Prop(); + } + } + + translate([0,0, -hp_k*2]) + DemoPropAngleSelect("blue") + Lid(); +} + +module DemoPropAngles(){ ////toplevel + for (i=[0 : len(prop_angles)-1]) + translate(i * [0, -100, 100]) + DemoPropAngle(prop_angles[i]); +} + module DemoFrame(){ ////toplevel color("red") TestFrameCase(); color("blue") intersection(){ Lid(); TestSelectLidFrame(); } @@ -1090,8 +1164,16 @@ module DemoProfiles(){ ////toplevel } translate([40,-30]) { - %LidEdgeProfile(); - PropProfile(10, 0); + difference(){ + LidEdgeProfile(); + translate(prlp10) + PropProfile(10, 1, 0); + } + translate(prlp10) + PropProfile(15, 0); + } + translate([60,-30]) { + PropAggregateProfile(); } }