Basic principles of 2d graphics
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Basic Principles of 2D Graphics. 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

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Basic Principles of 2D Graphics

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Basic principles of 2d graphics

Basic Principles of 2D Graphics


Raster graphics

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


Vector graphics

Vector Graphics

  • Efficient storage

  • Scalable


Simplejava2dexample

SimpleJava2DExample

  • Code necessary:

    • SimpleJave2DExample

    • MyFinishWindow


Window coordinates

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.


Drawing

Drawing

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


2d rendering process

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


2d geometry

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


Shapes

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


Curvedemo java

CurveDemo.java

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


Generalpath

GeneralPath

  • Car Example Code


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