deskthority

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/** 
 *  OpenSCAD model of MX caps to topre slider based on image from matt3o :
 *      http://deskthority.net/workshop-f7/topre-sliders-mx-caps-t7437.html 
 *
 *  2014-02-11 suka @ deskthority
 *
 *  All sizes are on estimates from above image, so most likely wrong :-)
 *  Other @todos are commented, most notably the join of the dent and the exact shape of the base cutouts tips.
 *
 */

// set resolution to a higher value for smoother curves
$fn=230;

eps=0.001; // minimal offset for boolean operations 

base_w  =  14;
base_h =   1;
base_radius = 2;

block_w = 3;
block_d = 1.5;
block_h=  4;

cyl_R = 5;
cyl_H = 8;
cyl_r = 4;
cyl_h = 4;

cut_w = 3;

dent_h=1.5;
dent_w=1;
dent_d=1.5;


// Base plate with cut-out, round corner and two blocks
difference() {
    union() {
        translate([-base_w/2, -base_w/2, 0]) {
            // base plate with one rounded corner
            hull(){
                translate([base_radius, base_w-base_radius, 0])  cylinder(r=base_radius, h=base_h);
                //translate([base_w-base_radius, base_radius, 0])  cylinder(r=base_radius, h=base_h);
                translate([base_w-1, 0, 0])                      cube([1,1,base_h]);
                translate([base_w-1, base_w-1, 0])               cube([1,1,base_h]);
                translate([0, 0, 0])                             cube([base_radius, base_radius, base_h]);
            }
            // two vertical blocks on base corners:
            translate([0,block_w/sqrt(2),-block_h+base_h]) rotate([0,0,-45]) translate([0,-block_d,0]) cube([block_w, block_d, block_h]);
            translate([base_w,base_w-block_w/sqrt(2), -block_h+base_h]) rotate([0,0,135]) translate([0,-block_d,0]) cube([block_w, block_d, block_h]);
        }
    }

    color("green"){
        // cut-out on one corner
        rotate([0,0,-135]) translate([-cut_w/2, cyl_R-1, -eps ]) cube([cut_w, base_w/2, base_h+2*eps]);
        // don't know what that cutout corners should look like
        translate([base_w/2-cut_w/sqrt(2)*1.3+eps, -base_w/2-eps, -eps]) cube([cut_w/sqrt(2)*1.3, cut_w/sqrt(2)*1.3, base_h+2*eps]);
    }
}

// Cylinder
difference() {
    cylinder(r=cyl_R, h=cyl_H+base_h);
    translate([0,0,     cyl_H+base_h-cyl_h+eps]) cylinder(r=cyl_r, h=cyl_h);
}


// cherry stem
color("blue") {
    rotate([0,0,90]) translate([-4/2, -1.0/2, cyl_h+base_h]) cube([4, 1.0, cyl_H-cyl_h]);
    rotate([0,0, 0]) translate([-4/2, -1.1/2, cyl_h+base_h]) cube([4, 1.1, cyl_H-cyl_h]);
}

// dent @todo fix connection to cylinder
rotate([0,0,-45]) color("red") {
    translate([dent_w/2+cyl_R-0.1,0,-dent_h/2+cyl_H+base_h]) rotate([0, -atan(dent_w/dent_h), 0])  {
        difference() {
            rotate([0, atan(dent_w/dent_h), 0]) cube([dent_w, dent_d, dent_h], center=true);
            translate([dent_w,0,0]) cube([2*dent_w, 2*dent_d, 2*dent_h], center=true);
        }
    }
}