Now let's use these same spheres to illustrate the next kind of CSG object, the intersection. We change the word union to intersection and delete the scale and rotate statements:
intersection {
sphere { <0, 0, 0>, 1
translate -0.5*x
}
sphere { <0, 0, 0>, 1
translate 0.5*x
}
pigment { Red }
}
We trace the file and will see a lens-shaped object instead of the two spheres. This is because an intersection consists of the area shared by both shapes, in this case the lens-shaped area where the two spheres overlap. We like this lens-shaped object so we will use it to demonstrate differences.