COMP330 Assignment 3
Objectives
This assignment covers the following topics:
3D modelling with triangular meshes
3D Transformations
Perspective and Orthogonal cameras
Illumination and shading
o Flat shading
Smooth shading
Texturing
Transparency
Screen-space Effects
Your task is to build a simple 3D world using height-mapped terrain, and implement a player
that moves around in the world, controlled using the arrow or WASD keys. You then have
the option of improving this world by implementing a variety of features.
Framework
A basic framework for the assignment is available via GitHub classroom:
https://classroom.github.com/a/qpKm8fZc
This includes:
code for loading level files from JSON in main.js
code for loading textures from PNGs in texture.js
the glMatrix library for 3D vectors and matrices
a selection of free textures from OpenGameArt
COMP330作业代做、3D modelling作业代做、Java实验作业代写
The assignment framework includes a class that loads a level definition from a JSON file.
This file includes the following data:
level.json – an example level
{
"heightmap”: {
"width": 10,
"depth": 10,
"height": [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 1, 2, 2, 1, 0, 0, 0,
0, 0, 0, 1, 2, 3, 2, 1, 0, 0,
0, 0, 0, 1, 1, 2, 1, 0, 0, 0,
0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0
]
}
"player": {
"position”: [1,1],
"heading”: [1,0]
}
"trees": [
3, 5,
5.5, 8.2
]
}
This defines height map, consisting of a 10x10 grid of points with different heights, and a
player at position (1,1) on the map, initially facing in the X direction (1,0). There are trees at
positions (3,5) and (5,8).
A simple framework has been provided to read these files into Javascript objects. Your
assignment should support this basic level format. You can extend the file format to include
other features you include in your world (e.g. other objects in the world, positionable lights,
etc).
You should provide a set of level files with your assignment submission which show off the
different features of your game. Only one level is necessary, but if you have different modes
(e.g. day and night time) you may want to provide different levels to demonstrate each.
Game features
Your mark will be based on the features you implement, from the list below. Each feature
has a mark value attached. Completing more than 100% worth of features will not earn
additional marks.
Terrain
Height map modelling: 20%
Use the height-map data provided to generate a 3D mesh. The mesh should consist of width
by depth points (for the values specified in the level file) spaced in a grid in the x/z axes. The
y-coordinate of each point is given by the corresponding value in the height array. These
points should be joined into a mesh of triangles. So, a 20 by 20 height map will have 19x19
squares each represented with two triangles, as shown below.
Trees: 5%
Create a simple 3D model of a ‘tree’ (or any other object you like: a rock, a streetlamp, a
TARDIS, a beachball, …). Place instances of this object sitting on the terrain at the
coordinates given in the JSON file. (Note that these coordinates are not necessarily
integers.)
Texturing: 10%
An appropriate seamless ground texture should be applied to the terrain. One example
texture has been provided in the framework.
Note: Use of third-party images is allowed provided that you have a license to use them
(e.g. they are under Creative Commons). Cite all third-part assets used at the end of your
design report. Use of unlicensed images is academic misconduct and will be treated
accordingly.
Multi-texturing: 5%
Multiple textures (e.g. grass and rock) are used across different parts of the terrain (at your
discretion), with appropriate blending where they meet.
Player movement
There are two possible modes for movement, simple keyboard controls or complex
keyboard + mouse controls. Only one of the two modes should be implemented.
Player movement (simple): 10%
The player should be able to move through the world using WSAD or the arrow keys:
Key Movement
W or Up Move forward in direction currently facing
S or Down Move backwards
A or Left Rotate left
D or Right Rotate right
The player should always be positioned at the same height as the terrain below them. This
will require interpolating the height of a point in the middle of a height map cell from the
neighbouring vertices. The player should not be allowed to move outside the bounds of the
terrain.
Player movement (complex): 15%
As an extension to the simple player movement, implement mouse look and strafing. The
players heading rotates when the mouse is left and right. Moving the mouse up/down tilts
the camera up and down.
Key Movement
W or Up Move forward in direction currently facing
S or Down Move backwards
A or Left Move left (strafing)
D or Right Move right (strafing)
Mouse left Rotate left
Mouse right Rotate right
Mouse up Look up (rotate camera)
Mouse down Look down (rotate camera)
Camera
There are two camera modes, first person perspective or third-person orthographic. You can
implement either or both for extra marks. If you implement both modes, use the “C” key to
switch camera modes.
An optional feature, in either mode, is to use the mouse-wheel to zoom the camera in/out.
First person perspective camera: 10%
In this mode, the camera is a first-person perspective camera, from the player’s point of
view. The camera should be positioned at the player’s current position (at an appropriate
height above the ground), facing along their current heading (tilted up or down if complex
player movement is implemented). The camera should implement the perspective
projection, with an appropriate field of view.
Note: This mode does not require a player avatar mesh model, as the player cannot see
themselves.
Third person orthographic camera: 10%
In this mode, the camera is a third-person orthographic camera, from a point of view above
and behind the player, looking down on it. The camera should follow a fixed distance above
and behind the player. The camera should implement the orthographic projection, with an
appropriate field of view.
Note: This mode requires a player avatar mesh model, as the player can see themselves. A
simple 3D shape (cube, cylinder) is sufficient.
Camera zoom: 5% per camera mode.
Using the scroll-wheel on the mouse, allow the player to zoom the camera in/out.
Lights
Multiple lighting modes are possible. If you have more than one lighting mode, you should
implement some way to switch between them (either a key control, or by using multiple
level files)
Directional light 5%
The world is lit using a single directional light (e.g. the Sun). Surfaces use an appropriate
diffuse flat-shaded lighting implementation.
Point light on player 5%
The world is lit using a point light connected to the player. Surfaces use an appropriate
diffuse flat-shaded lighting implementation.
Smooth shading 10%
Either of the lighting modes above, but using smooth shading, by interpolating normals
from neighbouring vertices.
Effects
These options are recommended only as a challenge if you find the other aspects of the
assignment easy.
Screen-space effects 5%
Your choice of screen-space effects, such as:
Bloom
Ambient occlusion
Motion blur
Fog
Film grain
Transparency 5%
Add transparent objects you your scene and use alpha-blending to render them
appropriately.
Report
The assignment framework includes a report template. Complete the table at the front of
the report indicating which of the components above you are attempting. For each
component, give an indication of where in the project it is implemented. Failure to submit a
complete report carries a 20% penalty.
Marking Rubric
Total mark = 40% for components implemented, 30% for code correctness, 20% for clarity of code
and 10% for creativity.
Each component that you implement will be marked for completeness of the implementation
against the specification. The overall program will be marked for correctness, clarity and creativity
according to the following rubric.
Grade Correctness Clarity Creativity
HD
(100)
Code is free from any
apparent errors.
Good consistent style. Well
structured & commented
code.
Original use of graphics to achieve
effects not included in lectures or
pracs.
HD
(90)
Code has minor errors
which do not significantly
affect performance
Minor inconsistencies in
style, or patches of
undocumented code.
D(80)
Code has one or two minor
errors that affect
performance
Code is mostly readable but
could be better structured
Creative use of graphics effects
from lectures/pracs to add
distinctiveness to submission
Cr(70) Code has multiple
significant errors
Code is inconsistently
structured, but readable
P(60) Code is functional but
contains major flaws
Code is poorly structured
and patchily documented
Basic effort put into colour palette
and shapes to give the simulations
a consistent style
F (<50) Code is not functional Code is undocumented and
largely unreadable
Implements required features
without effort put into style
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