chiark / gitweb /
fairphone-case: introduce "phone" (nfc)
[reprap-play.git] / fairphone-case.scad
1 // -*- C -*-
2
3 phone = [ 146.5, 76.75 ];
4
5 phone_cnr_rad = 6.0;
6
7 button_cutout_depth = 9;
8
9 phone_edge_thick = 9.0;
10 phone_total_thick = 12.0;
11 phone_backside_slope_inner = 1.5; // larger means shallower
12 phone_backside_slope_outer = 1.0; // larger means shallower
13
14 camera_pos_tl = [  7.0, 13.0 ]; // measured from tl corner
15 camera_pos_br = [ 22.85,37.85]; // tl/br as seen from back
16
17 case_th_bottom = 2.5;
18 case_th_lid = 2.5;
19 case_th_side = 2;
20 case_th_lip = 1.2;
21
22 case_struts_count = 6;
23 case_struts_solid_below = 1.00;
24 case_struts_solid_above = 0.75;
25 case_struts_width = 0.10;
26
27 keeper_th_z = 0.75;
28 keeper_th_x = 0.75;
29 keeper_inner_width = 2.75;
30 keeper_inner_height = 2.75;
31 keeper_slant_slope = 2; // larger means steeper
32
33 keeper_gap_z_top = 0.25;
34 keeper_gap_z_bot = 0.75;
35 keeper_gap_x     = 0.25;
36 keeper_gap_x_holes = 0.75;
37
38 case_lip = 1.25;
39
40 lid_gap_x = 0.25;
41 lid_gap_z = 0.25;
42 lid_lip = 1.75;
43
44 $fa = 5;
45 $fs = 0.1;
46
47 button_l_fudge = 4.5;
48
49 strut_min_at_end = 1.5;
50
51 // ---------- calculated ----------
52
53 phone_height = phone[0];
54 phone_width = phone[1];
55
56 // ----- could be changed -----
57 lid_buttoncover_gap = lid_gap_x;
58 lid_buttoncover_overlap = case_th_lip + keeper_gap_z_top;
59
60 phone_backside_slope_thick = phone_total_thick - phone_edge_thick;
61
62 //lid_lip_overlap_width xxx bad name = ;
63 //lid_lip_inner_slope = [ 5, 5 ]; // xxx
64
65 epp0 = [0,0];
66 epp1 = [0, -phone_edge_thick];
67 epp2i = epp1 + phone_backside_slope_thick * [ phone_backside_slope_inner, -1 ];
68 epp2o = epp1 + phone_backside_slope_thick * [ phone_backside_slope_outer, -1 ];
69 epp3 = epp2i + [10, 0];
70 epp5 = epp0 + [0,1] * (keeper_th_z + keeper_gap_z_top + case_lip);
71 epp4 = epp5 + [-1,0] * case_th_side;
72
73 kppe = [0,0];
74 kppd = kppe + [1,0] * keeper_inner_width;
75 kppc = kppd + [0,1] * keeper_th_z;
76 kppb = [ kppe[0] - keeper_th_x, kppc[1] ];
77 kppf = kppe - [0,1] * keeper_inner_height;
78 kppa = [ kppb[0], kppf[1] ];
79
80 lpp10 = [ epp5[0] + lid_gap_x, kppc[1] + lid_gap_z ];
81 lpp11 = [ lpp10[0],            epp5[1] + lid_gap_z ];
82
83 lp_r12 = case_th_lid - (lpp11[1] - lpp10[1]);
84
85 lpp12 = [ epp4[0] + lp_r12,    lpp11[1] ];
86 lpp13 = [ lpp12[0],            lpp12[1] + lp_r12 ];
87
88 echo(lpp13 - lpp10);
89
90 // button profile
91 bppM = epp4 + [0,5];
92 bppN = [ 0.5 * (epp0[0] + epp4[0]), bppM[1] ];
93 bppR = [ bppN[0] + lid_buttoncover_gap, -button_cutout_depth ];
94 bppS = [ epp1[0], bppR[1] ];
95 bppQ = [ bppM[0], bppR[1] - lid_buttoncover_overlap ];
96 bppP = bppQ + [0,1] * lid_buttoncover_gap;
97 bppO = [ bppN[0], bppP[1] ];
98 bppL = lpp10 + [5,0];
99 bppK = [ bppL[0], bppN[1] ];
100 bppJ = [ bppN[0], bppL[1] ];
101
102 module rectfromto(a,b) {
103   ab = b - a;
104   translate([min(a[0], b[0]), min(a[1], b[1])])
105     square([abs(ab[0]), abs(ab[1])]);
106 }
107 module circleat(c,r) { translate(c) circle(r); }
108
109 module KeeperProfile(slant=0){
110   use_e = kppe + [0,-1] * slant * keeper_inner_width / keeper_slant_slope;
111   polygon([use_e, kppd, kppc, kppb, kppa, kppf]);
112 }
113
114 module EdgeProfile(){
115   difference(){
116     hull(){
117       translate(epp3) square(case_th_bottom*2, center=true);
118       circleat(epp2o, r=case_th_bottom);
119       circleat(epp1, r=case_th_side);
120       rectfromto(epp0, epp4);
121     }
122     polygon([ epp5 + [0,10],
123               epp1,
124               epp2i,
125               epp3 + [10,0] ]);
126   }
127 }
128
129 module LidEdgeProfile(){
130   polygon([ lpp10,
131             lpp11,
132             lpp12,
133             lpp13,
134             lpp13 + [10, 0],
135             lpp10 + [10, 0]
136             ]);
137   intersection(){
138     circleat(lpp12, r=lp_r12);
139     rectfromto( lpp12 + [-10,   0],
140                 lpp12 + [+10, +10] );
141   }
142 }
143
144 module ButtonCoverProfile(){
145   intersection(){
146     polygon([ bppM, bppP, bppO, bppJ, bppL, bppK ]);
147     hull(){
148       EdgeProfile();
149       LidEdgeProfile();
150     }
151   }
152 }
153
154 module ButtonPlan(l, deep, cut){
155   epsilon =
156     (cut  ? 0 : lid_buttoncover_gap);
157
158   delta =
159     (deep ? lid_buttoncover_overlap : 0);
160
161   C = [0,0]; // by definition
162   T = [ 0, epp4[1] ];
163   G = T + [0,10];
164
165   B0 = C + [0,-1] * button_cutout_depth;
166   B1 = B0 + [0,1] * epsilon;
167
168   r0 = 0.5 * (T[1] - B0[1]);
169   A = [  -(l + button_l_fudge)/2 + r0, 0.5 * (T[1] + B0[1]) ];
170   H = A + [0,-1] * delta;
171
172   D = A + [-2,0] * r0;
173   F = D + [0,10];
174
175   E0 = 0.5 * (D + A);
176   E1 = E0 + [1,0] * epsilon;
177
178   I0 = [ E0[0], H[1] ];
179   I1 = [ E1[0], H[1] ];
180
181   hull(){
182     for (m=[0,1]) mirror([m,0])
183       circleat(H, r0 - epsilon);
184   }
185   for (m=[0,1]) mirror([m,0]) {
186     difference(){
187       polygon([ E1,
188                 I1,
189                 H,
190                 B1,
191                 G,
192                 F,
193                 D
194                 ]);
195       circleat(D, r0 + epsilon);
196     }
197   }
198 }
199
200 module CaseBase_rhsflip(yn=[0,1]) {
201   for (rhs=yn) {
202     translate([phone_width/2, 0, 0])
203       mirror([rhs,0,0])
204       translate([-phone_width/2, 0, 0])
205       children();
206   }
207 }
208
209 module CaseBase_botflip() {
210   for (bot=[0,1]) {
211     translate([0, -phone_height/2, 0])
212       mirror([0, bot, 0])
213       translate([0, phone_height/2, 0])
214       children();
215   }
216 }  
217
218 module AroundEdges(fill_zstart, fill_th, fill_downwards=0){
219   // sides
220   CaseBase_rhsflip(){
221     translate([0, -phone_cnr_rad, 0])
222       rotate([90,0,0])
223       linear_extrude(height = phone_height - phone_cnr_rad*2)
224       children(0);
225   }
226   // corners
227   CaseBase_rhsflip() CaseBase_botflip() {
228     translate([+1,-1] * phone_cnr_rad)
229       intersection(){
230         rotate_extrude()
231           intersection(){
232             mirror([1,0,0])
233               translate([-1,0] * phone_cnr_rad)
234               children(0);
235             rectfromto([0,-20],[10,20]);
236           }
237         translate([-10, 0, -20] + 0.01 * [+1,-1, 0] )
238           cube([10,10,40]);
239       }
240   }
241   // top and bottom
242   CaseBase_botflip(){
243     translate([ phone_width - phone_cnr_rad, 0,0 ])
244       rotate([90,0,-90])
245       linear_extrude(height = phone_width - phone_cnr_rad*2)
246       children(0);
247   }
248   // fill
249   translate([0,0, fill_zstart])
250     mirror([0,0, fill_downwards])
251     linear_extrude(height = fill_th)
252     rectfromto([+1,-1] * phone_cnr_rad,
253                [phone_width, -phone_height] + [-1,+1] * phone_cnr_rad);
254 }
255
256 module SideButton(y,l){
257   $button_l= l;
258   translate([0, -y, 0])
259     children();
260 }
261
262 module Buttons(){
263   CaseBase_rhsflip([1]) SideButton(20.6, 8.8) children(); // power
264 }
265
266 module Struts(x_start, z_min, th){
267   // if th is negative, starts at z_min and works towards -ve z
268   // and object should then be printed other way up
269   for (i= [1 : 1 : case_struts_count]) {
270     translate([0,
271                0,
272                z_min])
273       mirror([0,0, th<0 ? 1 : 0])
274       translate([0,
275                  -phone_height * i / (case_struts_count+1),
276                  case_struts_solid_below])
277       linear_extrude(height= abs(th)
278                      -(case_struts_solid_below+case_struts_solid_above))
279       rectfromto([               x_start, -0.5 * case_struts_width ],
280                  [ phone_width - x_start, +0.5 * case_struts_width ]);
281   }
282 }
283
284 module CaseBase(){
285   AroundEdges(epp3[1], case_th_bottom, 1)
286     EdgeProfile();
287 }
288
289 module Case(){ ////toplevel
290   difference(){
291     union(){
292       CaseBase();
293
294       // ledge (fixed keeper)
295       intersection(){
296         rotate([90, 0, 0])
297           linear_extrude(height = phone_height + phone_cnr_rad * 2)
298           KeeperProfile(1);
299
300         // outline of the whole case, to stop it protruding
301         translate([0,0, -25])
302           linear_extrude(height = 50)
303           hull()
304           // CaseBase_rhsflip() // actually, we only care about the LH
305           CaseBase_botflip()
306           circleat([+1,-1] * phone_cnr_rad, phone_cnr_rad + case_th_side/2);
307       }
308     }
309
310     // slot for keeper
311     CaseBase_rhsflip(1)
312       translate([0, -phone_cnr_rad, 0])
313       rotate([90, 0, 0])
314       linear_extrude(height = phone_height + phone_cnr_rad * 2)
315       minkowski(){
316         KeeperProfile();
317         rectfromto([ -keeper_gap_x,    -keeper_gap_z_bot ],
318                    [ keeper_gap_x_holes,    +keeper_gap_z_top ]);
319       }
320
321     // front camera
322     CaseBase_rhsflip([1])
323       mirror([0, 0, 1])
324       linear_extrude(height = 20)
325       mirror([0, 1, 0])
326       rectfromto(camera_pos_tl, camera_pos_br);
327
328     // struts (invisible, because they're buried in the case)
329     Struts(epp2i[0], epp2i[1] - case_th_bottom, case_th_bottom);
330
331     Buttons(){
332       mirror([1,0,0])
333         rotate([90,0,90]) {
334           translate([0,0,-10])
335             linear_extrude(height= 20)
336             ButtonPlan($button_l, 0,1);
337           translate([0,0, -bppR[0]])
338             linear_extrude(height= 20)
339             ButtonPlan($button_l, 1,1);
340         }
341     }
342   }
343 }
344
345 module Lid(){ ////toplevel
346   difference(){
347     union(){
348       AroundEdges(lpp10[1], lpp13[1] - lpp10[1], 0)
349         LidEdgeProfile();
350
351       // button covers
352       Buttons(){
353         intersection(){
354           rotate([90,0,90])
355             translate([0,0,-10])
356             linear_extrude(height= 20)
357             ButtonPlan($button_l, 1,0);
358           rotate([90,0,0])
359              translate([0,0,-100])
360             linear_extrude(height= 200)
361             ButtonCoverProfile();
362         }
363       }
364     }
365     Struts(lpp10[0] + strut_min_at_end, lpp13[1], -case_th_lid);
366   }
367 }
368
369 module TestLength(){ ////toplevel
370   intersection(){
371     Case();
372     translate([-30, -200, -20])
373     cube([30 + 15, 250, 40]);
374   }
375 }
376
377 module TestSelectWidth(){
378   translate([-30, -(phone_height - 25), -20])
379     mirror([0, 1, 0])
380     cube([200, 50, 40]);
381 }
382
383 module TestWidth(){ ////toplevel
384   intersection(){
385     Case();
386     TestSelectWidth();
387   }
388 }
389
390 module TestLidWidthPrint(){ ////toplevel
391   rotate([0,180.0]) TestLidWidth();
392 }
393
394 module TestSelectCamera(){
395   CaseBase_rhsflip(1)
396     translate([0,0,-25])
397     linear_extrude(height = 50)
398     mirror([0, 1, 0])
399     rectfromto([-20, -20],
400                camera_pos_br + [ 5, 5 ]);
401 }
402
403 module TestCamera(){ ////toplevel
404   intersection(){
405     Case();
406     TestSelectCamera();
407   }
408 }
409
410 module TestLidByCamera(){ ////toplevel
411   intersection(){
412     Lid();
413     TestSelectCamera();
414   }
415 }
416
417 module TestLidByCameraPrint(){ ////toplevel
418   rotate([180,0,0]) TestLidByCamera();
419 }
420
421 module DemoByCamera(){ ////toplevel
422   color("blue") TestLidByCamera();
423   color("red")  TestCamera();
424 }
425
426 module OneKeeper(){ ////toplevel
427   translate([0, -phone_cnr_rad, 0])
428     rotate([90, 0, 0])
429     linear_extrude(height = phone_height - phone_cnr_rad * 2)
430     KeeperProfile();
431 }
432
433 module OneKeeperPrint(){ ////toplevel
434   rotate([0,180,0])
435     OneKeeper();
436 }
437
438 module Keeper(){ ////toplevel
439   CaseBase_rhsflip()
440     OneKeeper();
441 }
442
443 module ButtonPlanForDemo(z, deep, cut){
444   translate([0,0,z])
445     ButtonPlan(8, deep, cut);
446 }
447
448 module DemoProfiles(){ ////toplevel
449   LidEdgeProfile();
450   %EdgeProfile();
451   KeeperProfile();
452   translate([0,0,-1]) color("black") KeeperProfile(1);
453
454   translate([20,0]) {
455     LidEdgeProfile();
456     %EdgeProfile();
457
458     demopoint_QR = [ bppS[0], bppQ[1] - 0.1];
459   
460     color("blue") ButtonCoverProfile();
461     color("red") {
462       rectfromto(bppQ, demopoint_QR);
463       rectfromto(bppR, demopoint_QR);
464     }
465   }
466
467   translate([-20,0]) {
468     color("black") ButtonPlanForDemo(-2, 0,1);
469     color("red" )  ButtonPlanForDemo(-4, 1,1);
470     color("blue")  ButtonPlanForDemo(-6, 1,0);
471   }
472 }
473
474 //EdgeProfile();
475 //KeeperProfile();
476 //CaseBase();
477 //%Case();
478 //Keeper();
479 //LidEdgeProfile();
480 //KeeperProfile();
481 //DemoProfiles();