Example Code

LibTarga

The following is an example program that allows you to read/write targa images. It also allows you to paint green lines over the image. It may be used as a satisfactory completion for assignment 2. LibTarga information is available here.

• directory
• MainTarg.cpp - main driver
• TargaWin.h, TargaWin.cpp - image display window class
• SampleComposition.dsp, SampleComposition.dsw - visual studio project files

FlTk

Look for Richard's tutorial on how to build FlTk programs in the CS environment.

He provided a sample program (with all files) as well as a project that compiles on of the standard FlTk demos.

OpenGL

My Tutorial on OpenGL basics for this class has a few examples.

• simple.cpp - a very simple FlTk/OpenGL program
• simple2.cpp - uses OpenGL alongside other widgets
• simple3.cpp - shows how to do picking

I have also added an example of how to do animation with GL and FlTk that provides some support code that might be useful in your projects.

• RunButton.H - header for my simple animation controllers
• RunButton.cpp - source file for my simple animation controllers
• simple4.cpp - simple program that uses RunButton

I have made a simple demonstration of drawing stuff in 3D with GL. Right now, the demo shows hack shadows (as we will discuss in class) and provides a basic interface for moving the camera around. It does not do lighting. Be warned: while it gives basic methods for doing things, it doesn't necessarily do them well. For example, the camera interface uses fixed axes and therefore suffers from severe gimbal lock. Also, it doesn't do any fancy GL tricks to make things look nice. If some GL wizard were to send me a nicer set of hacks to make things look better, I would encorporate them (especially for nicer looking shadows)

• 3d.cpp - the basic driver
• 3DUtils.H - some utility routines you may use too
• 3DUtils.cpp - the code for those routines
• Gl3D.dsp, Gl3D.dsw - a project file to build the program

Mark has also provided a sample solution to Program 4. It provides a similar, but different interface than mine:

• Mark's demo 3DGL

Compose

This is a sample skeleton Driver for Project 1. It should give you some ideas as to how to build your main loop.

• main.cpp - the driver itself
• Compose.dsp, Compose.dsw - project files

Texture Manager

This is a tool designed to make things a little easier to use textures in opengl. You can use it in place of glBindTexture. Instead of taking a number that is a "texture name," you pass it a string that is the name of a TGA file (without the .tga extension). If the image hasn't been loaded for you, it will get loaded in.

• Texture.H - the header file
• Texture.cpp - implementation

Note: this uses libtarga.

Project 3