1include <BOSL2/std.scad>
 2
 3// Shows all the orientations on cubes in their correct rotations.
 4
 5orientations = [
 6    RIGHT,  BACK,    UP,
 7    LEFT,   FWD,     DOWN,
 8];
 9axiscolors = ["red", "forestgreen", "dodgerblue"];
10axisdiam = 0.5;
11axislen = 12;
12axislbllen = 15;
13
14module orient_cube(ang) {
15    color("lightgray") cube(20, center=true);
16    color(axiscolors.x) up  ((20-1)/2+0.01) back ((20-1)/2+0.01) cube([18,1,1], center=true);
17    color(axiscolors.y) up  ((20-1)/2+0.01) right((20-1)/2+0.01) cube([1,18,1], center=true);
18    color(axiscolors.z) back((20-1)/2+0.01) right((20-1)/2+0.01) cube([1,1,18], center=true);
19    for (axis=[0:2], neg=[0:1]) {
20        idx = axis + 3*neg;
21        labels = [
22            "RIGHT",  "BACK",    "UP",
23            "LEFT",   "FWD",     "DOWN"
24        ];
25        rot(ang, from=UP, to=orientations[idx]) {
26            up(10) {
27                back(4) color("black") text3d(text=str("spin=",ang), size=2.5);
28                fwd(2) color(axiscolors[axis]) text3d(text="orient=", size=2.5);
29                fwd(6) color(axiscolors[axis]) text3d(text=labels[idx], size=2.5);
30            }
31        }
32    }
33}
34
35
36module text3d(text, h=0.01, size=3) {
37    linear_extrude(height=h, convexity=10) {
38        text(text=text, size=size, valign="center", halign="center");
39    }
40}
41
42module dottedline(l, d) for(y = [0:d*3:l]) up(y) sphere(d=d);
43
44module orient_cubes() {
45    // X axis
46    color(axiscolors[0]) {
47        yrot( 90) cylinder(h=axislen, d=axisdiam, center=false);
48        right(axislbllen) rot([90,0,0]) text3d(text="X+");
49        yrot(-90) dottedline(l=axislen, d=axisdiam);
50        left(axislbllen) rot([90,0,180]) text3d(text="X-");
51    }
52    // Y axis
53    color(axiscolors[1]) {
54        xrot(-90) cylinder(h=axislen, d=axisdiam, center=false);
55        back(axislbllen) rot([90,0,90]) text3d(text="Y+");
56        xrot( 90) dottedline(l=axislen, d=axisdiam);
57        fwd(axislbllen) rot([90,0,-90]) text3d(text="Y-");
58    }
59    // Z axis
60    color(axiscolors[2])  {
61        cylinder(h=axislen, d=axisdiam, center=false);
62        up(axislbllen) rot([0,-90,90+$vpr[2]]) text3d(text="Z+");
63        xrot(180) dottedline(l=axislen, d=axisdiam);
64        down(axislbllen) rot([0,90,-90+$vpr[2]]) text3d(text="Z-");
65    }
66
67    for (ang = [0:90:270]) {
68        off = rot(p=40*BACK,ang);
69        translate(off) {
70            orient_cube(ang);
71        }
72    }
73}
74
75
76orient_cubes();
77
78
79
80// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap