CSc 155 Assignment #3 – Lighting, Materials, and Shadows solved

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You are to create a world containing at least three different objects made of different
materials and textures (use at least two different materials and two different materials),
one global ambient light and one user-controllable positional light, and a user-controllable
camera. At least one object must cast a shadow on at least one other object in the scene.
Unlike A2, objects do not move. However, in addition to moving the camera around, you
will add controls for moving the positional light around. You can reuse some of your code
from A2, such as key bindings, camera controls, XYZ axes. You can make a scene similar
to that of A2, or an entirely different scene. Be creative!
Program Requirements
 World Objects
The world should contain at least three different objects. At least one object must be
imported from an external model. You can use the posted obj loader and one of the
posted obj models, or a model from another source, or you can build one using Maya or
Blender. Include XYZ axes that can be toggled on/off by SPACE bar as in A2.
Use at least two different textures. You can use textures created by you and/or outside
 Lighting
The world is to be lit by: (1) a global ambient light that is always on, and (2) a positional
light that can be toggled on/off by the “t” key. The positional light must be moveable with a
small amount via the following keys:
o – move the light forward
k – move the light backward
j – move the light left
l – move the light right
p – move the light down
i – move the light up
Your shaders must implement either Phong or Blinn-Phong reflection on all displayed
objects for global ambient light and the positional light (when enabled). It isn’t required to
account for distance attenuation, although you may add that if you wish.
The shader must also blend lighting and texture colors for objects so that the textured
objects also show the effects of lights.
Draw a dark yellow point (or something similar) at the location of the positional light.
 Materials
The program must use at least two different materials for rendering world objects. You
may obtain your material definitions from any source (such as the table in the lecture note
slides, although you are encouraged to find material definitions from other sources as
well). You may use the graphicslib3D.Material class to define your materials, or you
may implement an analogous class of your own. The Material class already has three
pre-defined static materials in it, and you may use those for one of your two materials.
 Shadow-Mapping
Use the standard shadow-mapping technique such that at least one object casts a shadow
on at least one other object. The shadow should move appropriately as the user moves
the positional light around. Make a reasonable attempt to reduce shadow-acne.
 Viewing
The user must be able to manipulate the camera using the same key bindings used in A2
(i.e., w, s, a, d, e, q, left and right arrow, up and down arrow).
Additional Notes
 Make appropriate use of mipmapping and anistropic filtering to avoid artifacts.
 Your code must be contained in a Java package whose name is exactly “a3” (lower
case). As before, the “main” class in your program be named exactly “Starter”. It
should be possible to run the program from a command prompt in the parent directory
by typing the command:
java –Dsun.java2d.d3d=false a3.Starter
Submit to Canvas TWO files (zip file and txt file) SEPERATELY (i.e., do NOT place the
txt file inside the zip file). The ZIP file should be named as (e.g., and should contain:
(1) your Java source files, compiled (.class) files, and GLSL shader files
(2) your texture image files
(3) your model files
(4) a screen capture (.jpg) of your program running
The submitted files must be organized in the proper hierarchy in the ZIP file; that is, the
.java and .class files must be contained within a subdirectory named “a3”.
The TEXT file (i.e., not a pdf, doc etc.) should be named as readme.txt and should list:
(1) explain which objects in your scene satisfy which requirements
(2) source information for each texture and model you used
(3) additional information you want to share with the grader
(4) the lab and the lab machine you have used to test your program
You will receive the grader comments on your text file when grades are posted.