Point
A point in 3D is very similar to a point in 2D. The 3D point adds a new Z component:
Like the 2D point, the 3D point can also be expressed by a vector. The point is where the vector points to.
Getting ready
We are going to create a new header file for 3D geometry, Geometry3D.h. All future 3D geometry will be added to this file. Because a 3D point has the same definition as a 3D vector, we're not creating a point struct. Instead we are going to re-declare the vec3 struct as a point using the typedef keyword.
How to do it…
Follow these steps to redefine a 3D vector as a 3D point:
- Create a new C++ header file, call this file
Geometry3D.h. - Add the basic ...
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