Death Star

Death Star
You are encouraged to solve this task according to the task description, using any language you may know.

Death Star is a task to display a region that consists of a large sphere with part of a smaller sphere removed from it as a result of geometric subtraction. (This will basically produce a shape like a "death star".)

Brlcad

<lang brlcad># We need a database to hold the objects opendb deathstar.g y

1. We will be measuring in kilometers

units km

1. Create a sphere of radius 60km centred at the origin

in sph1.s sph 0 0 0 60

1. We will be subtracting an overlapping sphere with a diameter of 40km
2. The resultant hole will be smaller than this, because we only
3. only catch the edge

in sph2.s sph 0 90 0 40

1. Create a region named deathstar.r which consists of big minus small sphere

r deathstar.r u sph1.s - sph2.s

1. We will use a plastic material texture with rgb colour 224,224,224
2. with specular lighting value of 0.1 and no inheritance

mater deathstar.r "plastic sp=0.1" 224 224 224 0

1. Clear the wireframe display and draw the deathstar

B deathstar.r

1. We now trigger the raytracer to see our finished product

rt</lang>

Openscad

<lang openscad>// We are performing geometric subtraction

difference() {

 // Create the primary sphere of radius 60 centred at the origin

 translate(v = [0,0,0]) {
   sphere(60);
 }

 /*Subtract an overlapping sphere with a radius of 40
    The resultant hole will be smaller than this, because we only
    only catch the edge
 */

 translate(v = [0,90,0]) {
   sphere(40);
 }

}</lang>

POV-Ray

<lang POV-Ray>camera { perspective location <0.0 , .8 ,-3.0> look_at 0

        aperture .1 blur_samples 20 variance 1/100000 focal_point 0}
                           

light_source{< 3,3,-3> color rgb 1}

sky_sphere { pigment{ color rgb <0,.2,.5>}}

plane {y,-5 pigment {color rgb .54} normal {hexagon} }

difference {

sphere { 0,1 }
sphere { <-1,1,-1>,1 }
 texture { 
   pigment{ granite } 
   finish { phong 1 reflection {0.10 metallic 0.5} }
 } 

} </lang>