Assignment 2
CMSC 740, Spring 2002
Due: 12:30pm Thursday, March 14, 2002
This assignment involves extending your code for Assignment 1 from 2D to 3D.
(a) Extrude the maze from 2D to 3D, with the height of each wall being 60 units and thickness
2 units. Thus each line of the 2D maze should correspond to four vertical rectangles forming
the four sides of a cuboid. For example, if a wall is from (1,10) to (10,10) the four rectangles
representing this wall in 3D will have the following extents: (i) (0,9,0) to (11,9,60), (ii) (11,9,0)
to (11,11,60), (iii) (0,11,0) to (11,11,60), and (iv) (0,9,0) to (0,11,60). Remember to orient
the rectangles correctly and with appropriate normals for correct illumination. (3)
(b) Set up the 3D modelview and projection matrices. Set up the field of view to 60o, aspect ra-
tio 1, near clipping plane at 1and far clipping plane at 800. Set the initial viewpoint at (75,75,50),
looking at (75,100,50) with the up vector along (0,0,1). Render the 3D maze with these viewing
parameters. (5)
(c) Implement rotations of the viewer on the arrow keys. Use the up/down arrow keys to allow
the viewer to look up or down by 5ofor each key press. Also implement the left/right viewing
on the left/right arrow keys, 30ofor each key press. Implement translation of the viewer using the
space-bar, 50 units forward for each key press. Here forward is defined as the horizontal component
of the direction the user is looking at. Reuse the 2D collision detection code from Assignment 1 to
prevent Gump from moving through walls. (5)
(d) Implement a light source on Gump’s head pointed in the direction of viewing (sort of like
the miner’s helmet light). The values of the light and wall colors in the demo are given below. Feel
free to change them. Just make sure that you don’t have the scene overly dark or bright. (5)
GLfloat wall_ambient[] = { 0.3, 0.3, 0.1, 1.0};
GLfloat wall_diffuse[] = { 0.27, 0.51, 0.70, 1.0};
GLfloat light_ambient[] = { 0.7, 0.7, 0.7, 1.};
GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1};
(e) Finding your way around in a 3D version of the maze is difficult. To help in navigation
create a small 2D (128 ×128) overview of the maze (your assignment 1) in the top-right corner
of the display window to guide the actions of Gump. This 2D display should float above the 3D
geometry being drawn. (2)
Special Note: Refer to the demo version of our sample implementation of this game to resolve any
ambiguities that might have remained in the above description.