// spindle params
inner_dia = 80;
dia_offset = 1;

// threaded insert params
insert_height = 7;
insert_dia = 5;
insert_bottom_dia = 4.2;

// magnet params
magnet_dia = 3;
magnet_height = 1;
magnet_number = 10;

// shape params
extra_offset = 4;
width = magnet_dia+extra_offset;
wedge_size = insert_dia + 3;
thickness = insert_dia + 3;
wedge_width = insert_height;
spacing_distance = 5;

$fn=100;

module ring(){
    difference(){
        linear_extrude(height=thickness, center=false, convexity=10, twist=0) {
            difference(){
                union(){
                    radius = (inner_dia+dia_offset)/2+width;
                    circle(r=radius);

                    squ_width = wedge_size+width;
                    squ_height = 2*wedge_width + spacing_distance + 1;
                    translate([-wedge_size/2-radius,0,0])
                    square(size=[squ_width, squ_height], center=true);
                }

                union(){
                    radius = (inner_dia+dia_offset)/2;
                    circle(r=radius);

                    squ_width = wedge_size+width+20;
                    squ_height = spacing_distance + 1;
                    translate([-wedge_size/2-radius,0,0])
                    square(size=[squ_width, squ_height], center=true);
                }
            }
        }

        for(i = [0:magnet_number]){
            rotate([0,0,i*36])
            translate([0, (inner_dia+dia_offset)/2+width/2-0.5, -0.01])
            cube(size=[15, 5, 3], center=true);
        }

        // threaded insert hole
        translate([-(inner_dia+dia_offset)/2-width-wedge_size/1.5, (spacing_distance + 1)/2-0.005, thickness/2])
        threaded_insert();

        // bolt hole
        translate([-(inner_dia+dia_offset)/2-width-wedge_size/1.5, -(spacing_distance + 1)/2+0.005, thickness/2])
        rotate([90,0,0])
        cylinder(h=insert_height+0.01, r=3.5/2, center=false);
    }
}

module threaded_insert(){
    rotate([-90,0,0])
    cylinder(h=insert_height+0.01, r1=insert_bottom_dia/2, r2=insert_dia/2, center=false);
}

// vacuum params
vacuum_pipe_dia_start = 32;
vacuum_pipe_dia_end = 30;
pipe_thickness = 2;
pipe_length = 50;
rotation_angle = 60;

pipe_height = 50;

module pipe(){
    // hollow pipe for vacuum cleaner
    rotate([0,rotation_angle,0])
    difference(){
        cylinder(h=pipe_length, r1=vacuum_pipe_dia_end/2+pipe_thickness, r2=vacuum_pipe_dia_start/2+pipe_thickness, center=false);
        translate([0,0,-0.005])
        cylinder(h=pipe_length+0.01, r1=vacuum_pipe_dia_end/2, r2=vacuum_pipe_dia_start/2, center=false);
    }
}

module vacuum_vent() {
    rotate([180,0,0])
    difference(){
        linear_extrude(height=pipe_height, center=false, convexity=10, twist=0) {
            difference(){
                union(){
                    radius = (inner_dia+dia_offset)/2+width;
                    circle(r=radius);
                }

                union(){
                    radius = (inner_dia+dia_offset)/2+2;
                    circle(r=radius);
                }
            }
        }

        for(i = [0:magnet_number]){
            rotate([0,0,i*36])
            translate([0, (inner_dia+dia_offset)/2+width/2, -0.01])
            cylinder(r=(magnet_dia+0.5)/2, h=magnet_height+0.5, center=false);
        }

        // Ring for metal
        translate([0,0,-8])
        cylinder(r=(inner_dia+dia_offset)/2+6, h=10, center=false);
    }
}


ring();
// pipe_x = cos(rotation_angle)*(vacuum_pipe_dia_end+pipe_thickness)/2;
// difference(){
//     vacuum_vent();
//     translate([-pipe_x+(inner_dia+dia_offset)/2+2,0,-30])
//     hull(){pipe();}

//     // threaded insert holes
//     for(i = [0:magnet_number]){
//         rotate([0,0,i*36])
//         translate([0, (inner_dia+dia_offset)/2+width+0.9-7, -pipe_height+5])
//         rotate([0,0,0])
//         threaded_insert();
//     }
// }
// difference(){
//     translate([-pipe_x+(inner_dia+dia_offset)/2+2,0,-30])
//     pipe();
//     translate([0,0,-pipe_height/2])
//     cylinder(r=(inner_dia+dia_offset)/2+2, h=pipe_height, center=true);
// }