Translation and Rotation (in 3D!)
What is the Matrix?
—Neo
In this chapter:
– 2D and 3D translation
– Using P3D and P2D renderers
– Vertex shapes
– 2D and 3D rotation
– Saving and restoring the transformation state: pushMatrix() and popMatrix()
14-1 The z-axis
As you have seen throughout this book, pixels in a two-dimensional window are described using Cartesian coordinates: an x (horizontal) and a y (vertical) position. This concept dates all the way back to Chapter 1, when I discussed thinking of the screen as a digital piece of graph paper.
In three-dimensional space (such as the actual, real-world space where you’re reading this book), a third axis (commonly referred to as the z-axis) refers to the depth of any given point. In a Processing sketch’s ...
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