3D Part design with OpenScad #48-Dimple module

Just for fun I wanted to make a module that could put dimples or bumps on different shaped surfaces, I was able to recycle the code from other modules and come up with a few ideas. I will definitely be making improvements and adding features to this.

Here is the code:

/* [Dimpled Sphere] */
Show_Sphere = true;
Show_Torus = false;
Show_dimples = false;
Dimple_size = .5; //[.1:.1:20]
Dimple_shape = 30;//[3:1:100]
Rows = 20; //[1:1:100]
Spacing = 15;//[1:1:100]
diameter = 30; //[1:.1:200]
Sphere_shape = 30;//[3:1:100]
Torus_Circle_Radius = 1; //[.1:0.01:400]
Torus_Fragments = 100; //[3:1:200]
Torus_outside_shape =100; //[3:1:200]
Torus_rotate =45; //[0:1:360]
Rotate_All_X = 0; //[0:.1:360]
Rotate_All_Y = 0; //[0:.1:360]
Rotate_All_Z = 0; //[0:.1:360]
Move_X = 0; //[-200:.1:200]
Move_Y = 0; //[-200:.1:200]
Move_Z = 0; //[-200:.1:200]

module Dimples(){
   rotate([Rotate_All_X,Rotate_All_Y,Rotate_All_Z])
   rotate([90,0,0])
   translate([Move_X,Move_Y,Move_Z]) 
for(h=[1:Rows])  
   rotate([0,0,h*360/Rows]) 
   translate([0,diameter/2,0]) 
   sphere(Dimple_size,$fn=Dimple_shape);
}

module Torus(){
rotate_extrude(convexity=10,$fn=Torus_Fragments) 
translate([diameter/2, 0, 0])
rotate([0,0,Torus_rotate])
circle(r=Torus_Circle_Radius,$fn=Torus_outside_shape);
}

if(Show_Sphere)
difference(){
  sphere(diameter/2-(.5*Dimple_size),$fn=Sphere_shape);
for (R=[0:Spacing:360])
   rotate([0,0,R])
   Dimples(); 
} 

if(Show_Torus)
difference(){
   Torus();
for (R=[0:Spacing:360])
   rotate([0,0,R])
   Dimples(); 
}

if (Show_dimples){
for (R=[0:Spacing:360])
   rotate([0,0,R])
Dimples();
}

Here are some dimples on a sphere. I wasn't trying to make a golf ball or anything in particular, I just wanted to see what it would look like.

I added a "show dimples" checkbox so you can see the dimples or make a design out of them to print:

Additionally you can adapt the code to import and add dimples to an STL file:

/* [Dimpled STL] */
Path_to_STL_File ="/home/none3/Desktop/YourFileName.stl";
Show_Difference = false;
Show_STL = true;
Dimple_size = .5; //[.1:.1:20]
Dimple_shape = 30;//[3:1:100]
Rows = 20; //[1:1:100]
Spacing = 15;//[1:1:100]
diameter = 30; //[1:.1:200]
Rotate_All_X = 0; //[0:.1:360]
Rotate_All_Y = 0; //[0:.1:360]
Rotate_All_Z = 0; //[0:.1:360]
Move_X = 0; //[-200:.1:200]
Move_Y = 0; //[-200:.1:200]
Move_Z = 0; //[-200:.1:200]


module Dimples(){
   rotate([Rotate_All_X,Rotate_All_Y,Rotate_All_Z])
   rotate([90,0,0])
   translate([Move_X,Move_Y,Move_Z]) 
for(h=[1:Rows])  
   rotate([0,0,h*360/Rows]) 
   translate([0,diameter/2,0]) 
   sphere(Dimple_size,$fn=Dimple_shape);
}

module DimpleStl(){
if(Show_Difference)
difference(){
  import(Path_to_STL_File,convexity=11);
for (R=[0:Spacing:360])
   rotate([0,0,R])
   Dimples(); 
} 
else{
if(Show_STL)
  import(Path_to_STL_File,convexity=11);
  for (R=[0:Spacing:360])
  rotate([0,0,R])
  Dimples(); 
}}

DimpleStl();

I highly recommend trying out the newest version of OpenScad,  I have been using the appimage on Linux and have had zero crashes and rendering times are impressive.

If you are interested in making a golf ball or Christmas ornaments here's some code to spiralize the dimples to space them more evenly over the surface of the sphere:

Show_bumps = false;
Show_dimples = true;
Spiralize = .129; //[.01:.001:.190]
Randomize = .738; //[.01:.001:1]
Dispersion = 2; //[.01:.01:2]
Bump_size = .50; // [.01:.01:3]
Bump_shape = 50; //[3:1:100]
Bump_number=307; //[1:.01:1000]
Sphere_size = 10; //[1:.01:100]
Shell_thickness = .90; //[.90:.01:1]


module Dimples(){ 
 for(i=[0:Bump_number]) {
      radius = Sphere_size;
      theta = 360*i/(Spiralize/Randomize);  
      phi = acos(1-Dispersion*i/Bump_number);
      x = cos(theta)*sin(phi) * radius;
      y = sin(theta)*sin(phi) * radius;
      z = cos(phi) * radius;
      translate([x,y,z]) 
      sphere(Bump_size,$fn=Bump_shape);
}}


if(Show_dimples)
difference() {
    sphere(Sphere_size,$fn=160);
    sphere(Sphere_size*Shell_thickness);
    Dimples();  
}

if (Show_bumps)
    Dimples();