X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=fairphone-case.scad;h=5da56cfc67249d818ce2208a3292dcd279960b7f;hb=29b27557a1a213096b515fafba33e2cf15fff5e0;hp=a41afd968357d788ec92887f6bb6375f2834ad50;hpb=6dd18ab9f7dfdb3a0e45426c227d186279a8876f;p=reprap-play.git diff --git a/fairphone-case.scad b/fairphone-case.scad index a41afd9..5da56cf 100644 --- a/fairphone-case.scad +++ b/fairphone-case.scad @@ -4,6 +4,8 @@ include phone = [ 75.0, 145.0 ]; +prop_buildout_less = 3; + prop_angles = [ 15, 30, 45, 60 ]; bumper = [ 0.250, -0.025 ]; @@ -117,9 +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 = 0.25; // each side -prop_x_pos = 30; +prop_caserecess_taper = 0.45; // one side only +prop_prop_gap = 0.5; +prop_prong_heel_slope = 0.5; // ---------- calculated ---------- @@ -128,6 +132,8 @@ phone_height = (phone + bumper*2)[1]; inside_br = [phone_width, -phone_height]; +prop_prong_h = prop_main_th; + //echo(camera_pos_tl + bumper, // camera_pos_br + bumper); @@ -137,11 +143,11 @@ lid_buttoncover_overlap = case_th_lip + keeper_gap_z_top; phone_backside_slope_thick = phone_total_thick - phone_edge_thick; -prop_lidrecess_depth = case_th_lid - prop_recess_under; +//prop_lidrecess_depth = case_th_lid - prop_recess_under; -prop_nose_len = case_th_lid - prop_recess_under; -prop_recess_slope = tan(prop_max_angle); // bigger means steeper -prop_recess_width = prop_main_th / cos(prop_max_angle) + prop_backfwd_gap; +//prop_nose_len = case_th_lid - prop_recess_under; +//prop_recess_slope = tan(prop_max_angle); // bigger means steeper +//prop_recess_width = prop_main_th / cos(prop_max_angle) + prop_backfwd_gap; //lid_lip_overlap_width xxx bad name = ; @@ -243,27 +249,38 @@ cppQ = [ cppR[0], cppV[1] - (catch_finger_height - cp_rQ) ]; cppF = [ cppV[0] + catch_finger_depth, cppC[1] ]; -// prop recess in lid +// prop recess in case -prl_r1 = prop_end_dia/2 + prop_recess_slop; // radius of end +prop_x_pos = phone_width/2; -prlp1 = [ lpp10[0] + prop_recess_slop + prop_end_dia/2, - lpp10[1] + prop_recess_slop + prop_end_dia/2 ]; +prop_recess_hw = 0.5 * prop_main_width + prop_side_gap; -// prop recess in case +prc_r1 = prop_end_dia/2; +prc_r3 = prc_r1 + prop_recess_slop; -prcp2 = [ epp1[0], case_bottom_z ]; // protrusion corner +prcp2 = [ epp4[0] + prop_buildout_less, + case_bottom_z ]; -prc_r2 = prop_end_dia/2 + prop_recess_slop; // radius of end +prop_caserecess_buildout_r = -1; // prcp2[0] - epp2o[0]; -prcp1_y = epp2o[1] - prop_recess_under - prc_r2; -prcp2_x = prcp2[0] + prop_caserecess_behind + prc_r2 + - (prcp1_y - case_bottom_z) * prop_caserecess_taper; -prcp2 = [ prcp1_x, prcp1_y ]; // centre of tip circle +prcp1 = [ epp2o[0], + epp2i[1] - prc_r3 ]; -prop_recess_hw = 0.5 * prop_main_width + prop_side_gap; +// prop recess in lid + +prl_r10 = prop_end_dia/2; +prl_r10o = prl_r10 + prop_recess_slop; -prop_caserecess_buildout_r = prcp2[0] - epp2o[0]; +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]; + +$prp_r10 = prl_r10; // ---------- modules ---------- @@ -605,6 +622,102 @@ module CaseBase(){ EdgeProfile(); } +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]; + b = p + x; + + 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)); + $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; + + //echo("abc", a,b,c); + + v1 = [ [ cos(psi), -sin(psi) ], // x + [ sin(psi), cos(psi) ] ]; // y + + $prpp7 = [0, c + (lpp13[1] - $prpp10[1] - hp_k) ]; + + $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] - 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], $prpp3); + } + } + // main shaft + rotate([0,0, rot*-$prp_theta]){ + hull(){ + extra = cut ? prop_recess_slop : 0; + rectfromto($prpp6, $prpp9); + circleat($prpp11, $prp_r11 + extra); + circleat($prpp10, $prp_r10 + extra); + } + } + } +} + +module PropAggregateProfile(){ + for (angle = prop_angles) + PropProfile(angle, 0,0); +} + +module Prop(){ ////toplevel + hw = prop_main_width/2; + linextr(-hw, +hw) + PropAggregateProfile(); +} + module Case(){ ////toplevel difference(){ union(){ @@ -626,6 +739,16 @@ module Case(){ ////toplevel // hinge HingePortion(hex20, hex21) HingeBaseProfile(); + + // buildout for prop recess + if (prop_caserecess_buildout_r > 0) Flip_rhs(1) + linextr(case_bottom_z, epp2i[1]) + hull() { + for (dxs = [-1,+1]) + circleat([ prop_x_pos + dxs * prop_caserecess_buildout_r, + -epp2o[0] ], + r = epp2o[0] - prcp2[0]); + } } // slot for keeper @@ -669,14 +792,6 @@ module Case(){ ////toplevel ButtonPlan($button_l, 1,1); } - // buildout for prop recess - Flip_rhs(1) - linextr(-case_th_bottom, epp2i) - hull() { - for (dxs = [-1,+1]) - circleat([ prop_x_pos + dxs * prop_caserecess_buildout_r, - epp2o[0] ]); - } } // apertures along top edge @@ -705,14 +820,14 @@ module Case(){ ////toplevel // prop recess Flip_rhs(1) - translate([0,0,x]) + translate([prop_x_pos,0,0]) rotate([90,0,90]) linextr(-prop_recess_hw, +prop_recess_hw) + mirror([1,0]) hull(){ - for (zs=[ -1,0,+1 ]) - circleat(prcp2 + 20*(abs(zs) * [0,-1] + - zs * [1,0] * prop_caserecess_taper), - pr_r2); + for (d=[ [0,0], [0,-1], [+1,-1/prop_caserecess_taper] ]) + circleat(prcp1 + 20*d, + prc_r3); } } } @@ -748,6 +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); } } @@ -876,19 +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); @@ -902,7 +1013,6 @@ module TestSelectFrame(){ module TestSelectLidFrame(){ TestSelectFrame(); - TestSelectPropRecesses(prop_lid_posns); } module TestFrameCase(){ ////toplevel @@ -945,6 +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(); } @@ -1010,6 +1162,19 @@ module DemoProfiles(){ ////toplevel color("blue") CatchCatchProfile(); color("red") difference(){ EdgeProfile(); CatchCutProfile(); } } + + translate([40,-30]) { + difference(){ + LidEdgeProfile(); + translate(prlp10) + PropProfile(10, 1, 0); + } + translate(prlp10) + PropProfile(15, 0); + } + translate([60,-30]) { + PropAggregateProfile(); + } } //EdgeProfile();