In previous chapters, you learned about displaying moving graphics with the. Quartz 2D is actually a Mac OS X technology that has made its way. In this chapter, you will learn how to unleash the power of Core Animation in your own. Chapter, to create fades and other types of animated transitions between the two.

Quartz uses a standard Cartesian coordinate system. By default, the origin is in the lower-left corner of the drawing canvas with x values increasing to the right and y values increasing upwards. Coordinates are floating-point values that represent units in a device-independent coordinate system. An application can draw to a window or a bitmap, a printer, or another output device. Sharp mx 5111n driver for mac windows 7. Quartz takes care of mapping the coordinates appropriately.

As you've seen in 'Quartz 2D Drawing Basics' (page 15), the coordinate system can be transformed by translation, rotation, and scaling operations to achieve a variety of interesting effects with relatively little effort. Quartz also provides additional functions to manage coordinate transformations in a variety of ways. With a more complete understanding of the Quartz coordinate system, coordinate transformations, and the tools Quartz provides, you can greatly increase the capabilities of your application and simplify your usage of Quartz.

User Space and Device Space

Quartz operates in two coordinate spaces: user space and device space. User space is an idealized coordinate system that an application draws into. User space coordinates don't necessarily correspond to individual pixel values on any particular output device. User space is abstract; it can be transformed by translation, rotation, and scaling. The origin, orientation, and scale of user space coordinates are not fixed.

Device space is the coordinate system that corresponds to the individual pixels on a specific physical output device, such as a display or printer. The device space coordinate system does not..