In this chapter, we will discuss point lights. We've covered lighting systems in a bit of depth so far. One technique is directional lights, which essentially are light sources that point in a certain direction, hence the name directional light; but they do not have an original location, that is, they are infinitely far away. So, say for example, we have two objects that are exactly the same, rotated exactly the same way, and there's no other lighting affecting those objects; no matter how far they are away from each other, they will not be affected differently by the directional light source.
A point light is a light that has an actual origin, and it emits the light in every single direction:
You can almost think of a point light like our sun or a star in real life. You could argue that the sun technically emits different amounts of light from different sides, but we could, for argument's sake, say it emits the same intensity, the same type of light from...