O'Reilly logo

openFrameworks Essentials by Denis Perevalov, Igor Tatarnikov

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Centering the coordinate system

By default, in openFrameworks (and in most computer programs dealing with 2D graphics), the center of the screen coordinate system is placed in the top-left corner of the screen. The horizontal axis is directed to the right and the vertical axis is directed downwards. The measurement unit is the pixel.

For a screen with size 1280 × 720 pixels, the top-left corner has the coordinates (0, 0) and the bottom-right corner has the coordinates (1280-1, 720-1) = (1279, 719), as shown in the following screenshot:

Centering the coordinate system

This shows the default coordinate system

We are planning to implement generative graphics, which is situated around ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required