Basic Principles of 2D Graphics

1. Basic Principles of 2D Graphics

3. Raster Graphics • aka pixel or pixel-oriented graphics. • Colors are assigned to each pixel. • Used for computer monitors, printers, and file formats like bitmap or jpg • All geometrical shapes must be converted to pixels • Leads to high computational efforts • Possible aliasing effects (aka jaggies) • Bound to specific resolution

4. Vector Graphics • Efficient storage • Scalable

10. SimpleJava2DExample • Code necessary: • SimpleJave2DExample • MyFinishWindow

12. Window Coordinates • To find the exact width of the margins (usually this is not necessary, but the ability is available) Insets ins = this.getInsets(); This statement places the width of the left, right, upper, and lower margin in pixels and can be retrieved by: ins.left, ins.right, ins.top, and ins.bottom.

13. Drawing • In Java2D, you first define your objects. However, none of them will appear on the screen until they are either drawn or filled.

14. 2D Rendering Process • Simple 2D Graphics programs can be outlined as follows: • Construct 2D Objects • Apply transformations on those objects • Apply color and other rendering properties • Render the scene on a graphics device

15. 2D Geometry • 2D Geometric objects are made up of an infinite number of points in a plane. • They can be represented efficiently through geometric equations or parametric equations that describe the objects

23. Shapes • Object implement the “Shape” interface with a draw and fill method. • Useful facts and examples: http://www.apl.jhu.edu/~hall/java/Java2D-Tutorial.html#Java2D-Tutorial-Shapes

28. CurveDemo.java • For an example of how to create curves in Java2D, click here.

44. GeneralPath • Car Example Code