Notes for Homework 8

• NOTE: Make sure to update your webpage with images from this assignment!
• Code to read and write PPM and BMP images is available here.
• Example executables for Windows and Linux.
  • If you get an Windows error when running the Windows example, you may have conflicting copies of GLEW.
    • Try deleting the glew32.dll that comes with the example.
  • If you get an X-Error when running the Linux example, I bet you're trying to run the program remotely.
    • Try running locally on your machine, or go to MLH 301 and run it on the lab machines.
• Code snippet to draw in the lower right corder, as per Problem 4.
• You may wish to look at the functions glPushAttrib() and glPopAttrib().
• Things to note:
  • Depth buffering should be enabled for this assignment. Make sure you glEnable(GL_DEPTH_TEST), and specify you want a depth buffer in glutInitDisplayMode( GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH ).
  • Load textures and objects in an initialization routine (not in your display code) so you don't slow down your program by loading every frame!
• This paper is a complex read, but has useful information about setting up texture coordinates for shadow mapping.
• My directory of textures.
• My directory of models.
• If you are using Visual Studio, a number of OpenGL constants and functions needed for this assignment may not be defined in your "GL/gl.h" file (looks like some newish versions of VS.Net ship with OpenGL Version 1.1 headers). However, you can still use these functions, you just need to:
  • Download GLEW Binaries
  • Copy "glew.h", "glxew.h", and "wglew.h" to Microsoft's "include/GL/" directory (the same directory that has "gl.h" and "glut.h").
  • Copy "glew32.lib" and "glew32s.lib" to Microsoft's "lib/" directory (the same directory that has "glut32.lib" and "opengl32.lib").
  • Copy "glew32.dll" either to your "Windows/System32" directory or into the same directory as your executable.
  • Include "glew32.lib" while linking (goto Menu: "Project->{projectName} Properties", select "Configuration Properties->Linker->Input", and change "Additional Dependancies" to be "glew32.lib glut32.lib glu32.lib opengl32.lib".
  • "#include < GL/glew.h >" in your program.
  • Call "glewInit();" in main() right after "glutCreateWindow( ... );"

Chris Wyman (cwyman@cs.uiowa.edu)