Using ofPoint

Maybe you noted a problem when considering the preceding flower example: drawing primitives by specifying the coordinates of all the vertices is a little cumbersome. There are too many numbers in the code, so it is hard to understand the relation between primitives. To solve this problem, we will learn about using the ofPoint class and then apply it for drawing primitives using control points.

ofPoint is a class that represents the coordinates of a 2D point. It has two main fields: x and y, which are float type.

Note

Actually, ofPoint has the third field z, so ofPoint can be used for representing 3D points too (we use this capability in Chapter 7, Drawing in 3D). If you do not specify z, it sets to zero by default, so in this case you can think of ofPoint as a 2D point indeed.

Operations with points

To represent some point, just declare an object of the ofPoint class.

ofPoint p;

To initialize the point, set its coordinates.

p.x = 100.0;
p.y = 200.0;

Or, alternatively, use the constructor...