University:
Boston University
Course:
MET CS 201 | Introduction to Programming
Academic year:

2020
Views:

259

Pages:

17
Author:

Giselle A.

Graphics Computer Graphics vs. Graphic Design  Computer Graphics is not using Photoshop- it’s learning how to MAKE Photoshop.  Within CS, computer graphics is the study of how to make a computer render images.  We usually focus on 3D images, but it also encompasses 2D image processing.  It involves a lot of code, and a lot of math (particularly geometry and matrix algebra), but the rewards are worth it. Some applications of graphics  Cinematic CG  Animation & Scientific Modeling  Video games  Photorealistic image rendering  Image editing tools  Java Applets Cinematic CG Video Games Animation and Scientific Modeling http://www.youtube.com/watch?v=E37Ss9Tm36c Photorealistic Images Image editing tools Java Applets/Applications  Most of the really cool stuff you can do with Graphics requires a very solid background  One of the more basic forms of graphics that you can do is in Java applets and applications.  Many times when writing an applet, you’ll want to include graphics or animations that the user can interact with (such as an interactive chess game) Java’s Graphics Package  If you’ve never programmed in Java before, don’t worry about it! We’ve provided and explained all the commands that you will need to know for this project.  Ignore most of the code- All of the code that you add to draw the graphics will be placed in the paint method. Your objective The coordinate system  When you specify where to draw an element, you are telling the computer the pixel locations of where you want to put the shape.  The upper left hand corner is the origin, (0,0).  The x axis increases as you go across  The y axis increases as you go down. startX and startY  For your convenience, we included the startX and startY variables to serve as an easier reference point for you to use.  So instead of going through the trouble to specify the exact pixel coordinates, you can just say startX+___ and startY+____  Both have been initialized to 250. Feel free to change these or not use them at all. g.setColor(Color.BLACK);  Use this command whenever you want to change colors. The next items you draw will be in that color until you change the color again.  If you wanted to change the color to blue, you would type g.setColor(Color.BLUE);  Or for red, g.setColor(Color.RED);  And so on. Note that the name of the color must be in all capitals g.fillOval  Draws an oval (or circle) and colors it in.  FORMAT: g.fillOval(xposition, yposition, width, height). All in units of pixels.  A circle is just an oval where width = height  Sample: g.fillOval(startX+5, startY+5, 30 ,30); g.fillArc  Draws and colors in an arc. Think of a pie chart  FORMAT:  g.fillArc(xposition, yposition, width, height, startAngle, arcAngle)  startAngle = the beginning angle  arcAngle = the extent of the arc, relative to the beginning angle.

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