CMPT 361

ASSIGNMENT 2

DUE DATE: MONDAY, NOVEMBER 13, 2000 - MIDNIGHT

Your assignment has three parts:

· Create an environment which allows you to ADD, DELETE and manipulate (SCALE, ROTATE, TRANSLATE, SHEAR) objects in 3D space.

· Also allow control over the projections (ORTHOGRAPHIC, PERSPECTIVE) and camera orientation (CENTER OF PROJECTION, VIEW REFERENCE POINT).

· You must provide control for the objects via an input file.

· add <object> at <x,y,z> called <name>

where <object> is the name of one of the available objects (such as a cube), <x,y,z> is a

3D position in space, and <name> is a UNIQUE name you give the object (such as cube1).

· delete <name>

object gets deleted

· scale <name> by <Sx,Sy,Sz>

where <Sx, Sy, Sz> are scale factors in x, y and z. NOTE that scale should be relative

to the center of the object! (ie. scale cube1 by 10, 10, 10)

· rotate <name> by <Rx, Ry, Rz>

where <Rx, Ry, Rz> are angles of rotation (in degrees) around the x, y, and z axes.

NOTE that the rotation should be about the center of the object!

· translate <name> by <Tx,Ty,Tz>

where <Tx, Ty, Tz> is the 3D translation vector.

· scale <name> by <Sx,Sy,Sz>

where <Sx, Sy, Sz> are shear factors along the principle axes.

· orthographic projection

switch to orthographic projection.

· prespective projection

switch to perspective projection.

· centre of projection <Cx,Cy,Cz>

where <Cx, Cy, Cz> is the camera’s (viewer’s) eyepoint.

· view reference point <Vx,Vy,Vz>

where <Vx, Vy, Vz> is the point on the viewing plane on the line of sight that is

connected to the centre of projection.

· You will need to use homogeneous matrix multiplications to perform the scale, translate, rotate, and projection operations.

· 10% BONUS – implement a graphical user interface to perform all of the above operations (using GLUI).

Supplied Source Code:

· The only graphics routine you are allowed to use (and the only one you will need) is: writeLine(x1, y1, x2, y2)

Where (x1, y1) and (x2, y2) are the endpoints of the line, call it AFTER projecting the lines from 3D into 2D.

· An assignment template (and several GLUI examples) have been placed at:
http://www.sfu.ca/~swindell/cmpt361/cmpt361.htm

Documentation:

· Algorithms should be described with comments in the source code only, where appropriate. Tell us what your code is doing!

· Submit a short readme file to explain how to run your code

· Please submit your code and Makefile via the on-line submission system