Project4Fall13
Project 4: Light and Shade
This project is on OpenGL lighting and shading, and includes GLSL shader programs.
This project is due on Friday, November 1st at 1:30pm. It will be discussed in Center Hall 105 on Monday, October 28th at 3:00pm.
Note that GLSL shaders, which are needed for part 2 of the assignment, will be covered in class on Tuesday, October 22nd.
1. Mouse Control (20 Points)
Start by reviving your application from assignment 2: you will need to be able to display the cube, as well as the following three 3D models into your application and display them at reasonable sizes (screen filling). The function keys should switch between the models.
These are the models you need to be able to load. Note that some of them are different files than before, as we now need files with normals. Note that the OBJ reader we gave you in project 2 already parses normals.
You are welcome but not required to support the keyboard commands from assignment 2 to move around the models. However, you will need to add mouse control, which will allow rotating the model about the center of your OpenGL window, as well as scaling the model up and down. The left mouse button should be used for rotation, the right mouse button should zoom in and out when the mouse is moved up or down while it is pressed.
This video shows how the trackball-like rotation should work. We provide sample code for the trackball rotation. You will need to adapt it to the syntax of your matrix and vector classes and get it to work within your application.
To access the mouse x and y coordinates, you will need to use GLUT's callback functions glutMouseFunc(), which gets called when you press a mouse button, and glutMotionFunc(), which gets called constantly while you hold the button down and move the mouse. Note that successive trackball rotations must build on previous ones; at no point should the model snap back to a previous or default position.
2. OpenGL Lighting and Shading (30 points)
Write classes to manage light and material properties (Light and Material). As a starting point, refer to the relevant sections in Chapter 5 of the OpenGL Programming Guide, as well as the OpenGL Lighting FAQ.
