Computer Graphics

1
Computer Graphics

• Lab 1
• OpenGL

2
What is OpenGL?
3
What is OpenGL?

• OpenGL is a software interface to graphics
• hardware. You can use to specify the objects
• and operations needed to produce interactive
• three-dimensional applications
• OpenGL is designed as a hardware-independent
  interface to be implemented on many different
  hardware platforms.

4
OpenGL

• The most popular raster graphics library,
  providing a powerful but primitive set of
  rendering commands
• Already supported by every window systems
• OpenGL Utility Library (GLU) higher-level
  routines, part of OpenGL implementation
• Setting up matrices for specific viewing
  orientations and projections
• Performing polygon tessellation and rendering
  surfaces
• OpenGL Utility Toolkit (GLUT) window
  system-independent high-level library. Need to
  install this library separately.

5
OpenGL

• Install OpenGL Utility Toolkit (GLUT) for MS
  Windows
• Download GLUT from
• http//reality.sgi.com/opengl/glut3/glut3.html
• Unzip the package
• Set include directory and lib directory in
  the C Compiler to include the directory
  containing glut.h, glut.lib
• Copy glut32.dll into directory
• DRIVE\WINNT\SYSTEM
• Add include ltglut.hgt to the beginning of the
  program

6
OpenGL

• OpenGL Programming Guide
• http//www.cs.ucf.edu/dsg/dtran/teaching/cps5
• 60/openGL/install/theredbook.zip
• Nate Robins OpenGL Tutors
• http//www.cs.utah.edu/narobins/opengl.html

7

• If you are using a PC, OpenGL is included with
  all versions of Windows. You will have to get
  GLUT from the web. For windows you can download
  just the dll, lib and .h files. You should find
  OpenGL32.dll and glu32.dll with your system
  files. You should find the corresponding lib and
  .h files supplied with your compiler. The
  corresponding GLUT files should be placed with
  them.

8
OpenGL

• how to install the glut libraries and dll's ?
• glut.dll
• glut32.dll
• glut.h
• glut.lib
• glut32.lib

9

• Files .h, .lib, .dll
• The entire folder gl is placed in the Include
  directory of Visual C
• The individual lib files are placed in the lib
  directory of Visual C
• The individual dll files are placed in
  C\Windows\System32

10

• Copy both glut.dll and glut32.dll into your
  windows directory (WINDOWS , or WINDOWS
  \System32)
• Copy your glut.h to
• ltdrivegt\ltVC pathgt\include\GL\glut.h
• put the drive where you installed VC
  instead of the ltdrivegt
• put the directory where you installed VC
  instead of the ltVC pathgt
• 3. Copy your glut.lib and glut32.lib to
• ltdrivegt\ltVC pathgt\lib\glut.lib
• ltdrivegt\ltVC pathgt\lib\glut32.lib

11

• how to setup VC so that you can use the glut
  libraries?
• Start VC and create a new project.
• 2. The project has to be a "Win32 Console
  Application"
• 3. Type in the name of the project and where it
  will be on your hard drive.
• 4. Chose an empty project and click next or
  finish
• 5. First thing you need to do when the project
  opens up is to click on the "Project" menu item
  from the top.
• 6. Chose "Settings" (a window will come up)
• 7. On the left side of the window there are tabs,
  chose the "Link" tab
• 8. The string field labeled "Object/library
  modules" has a few lib files already set in it
• 9. Go to the end of this string field and enter
  opengl32.lib glut32.lib glu32.lib
• 10. Chose "OK" and that will include all the
  opengl libraries that you need
• 11. Now all you need to do is include ltgl\glut.hgt
  and you are ready to go

12
(No Transcript)
13
Example