
Unity 4.x Game Development by Example: Beginner's Guide
By :

The center of your game world is called the origin. The origin is the magical place in 3D space where everything begins. 3D space is divided into three axes: X, Y, and Z. If you remember your Cartesian grid from grade school, or if you've ever seen a bar or line graph, the X-axis runs one way (usually horizontally), and the Y-axis runs perpendicular to it (usually vertically). 3D is like taking a second piece of paper and sticking it at a right angle to your graph so that this axis is perpendicular to both X and Y-axis and you have a third axis firing straight up at your face from your desk, and down into the floor in the opposite direction.
The orientation (the way the X, Y, and Z axes are positioned) varies from program to program. Unity has a Y-up orientation. The X and Z axes run perpendicular to each other on the "floor". If you hold your arms out like a scarecrow, your arms are the X axis, and the Z axis runs through your belly button. The Y axis runs straight up into the...
Change the font size
Change margin width
Change background colour