​​ COMP330: Computer Graphics (2016s1) Assignment 3 This assignment is designed to give you practice with aspects of 3D graphics programming including: A. Hierarchical 3D modelling. B. User activated animations. C. Perspective viewing from both a fixed and moving viewpoint in 3D space. D. Viewports. E. Use of lighting and texturing. F. Scene management, generation. The objective of the assignment is to design and implement in C++ and OpenGL a program which displays a simple robot inside a room. The robot should be able to move around the room, and to pick up and set down objects within the room. The following diagram displays a perspective view of a simplified android robot. While you are in principle free to design your own robot, you should aim to create one which has a roughly similar structure, and at least a reasonably similar level of detail. Your program will be marked out of 40, and this mark will be worth 20% of your final mark for this unit. Relevant sample programs Two relevant sample programs are available for downloading from the Assignments section of the COMP330 iLearn space: please download the filesrobotArmLambert.zip and manualModelling.zip from there. (These files are also available in the Week 7 section.) Study, compile (build), and run each program. Notice that the scene displayed by the first program can be simply animated via the keyboard bottom row zxcvbnm, (together with pqr), or alternatively by pressing 1 to obtain a timed animation. This program does not use a scene graph to store a logical model of the scene. Consequently its structure is relatively simple: no classes are defined, but there are numerous functions. The scene displayed by the second program shows a simple timed animation of a "quad chain"; some other objects are displayed fixed. This program does use a scene graph (tree) to store a logical model of the scene. Furthermore, this program makes strong use of object oriented programming techniques to represent and process the scene graph (tree). Consequently, it structure is relatively complex: a class is defined for each scene object, and some such classes are derived from others. Nevertheless, the overall structure of the program is not too difficult to understand. It will be discussed in lectures and practical classes. You are free to use either (or neither, or both) of these sample programs to guide your work on this assignment. Indeed you could use one of the sample programs, of your choice and modified as necessary, as a kind of starting point for your work. But since your assigned requirements are rather different from the features of the sample programs, you may want to prune much away from your chosen sample program before starting your own development work. Keep in mind also that lectures and practical classes will provide you with many of the concepts you will need to be successful in this assignment and in the final exam. Tasks The requirements are set out below. 1. (4 marks) Title page / Start window Please provide a simple but attractive title page/ start window in colour which introduces the user to the program. (This page should contain at least your name and an image of your robot.) 2. (12 marks) The initial basic scene Upon the user's request a perspective view of a room should appear. The view should be from a point located at the front of the room, and looking toward the rear wall. The room should contain at least a robot, situated left foreground, and a table, situated right background. The robot's structure should be roughly similar to that of the robot depicted above, although the exact details of the design are up to you. That is, it should consist of a base (perhaps a pedestal base, as in the diagram) and an upper body which could swivel on the base. The upper body should comprise (at least) a head, a trunk and two arms. It is suggested that the head could rotate relative to the trunk; and each arm could rotate independently about a horizontal axis at each shoulder. Moreover each arm could contain some kind of gripping mechanism, such as a fixed hand and a sliding (translating) thumb as gripper. The table should have four legs. In a first, simple version of your program, a few simple objects (such as a box, a ball and a vase) could be displayed on the floor. A later, more advanced, version should provide an interface which permits the user to position using the mouse an assortment of objects on the floor of the room. It is suggested that you provide a set of basic object types such as box, ball, vase, triangular pyramid and cylinder. Your objects should be different from those in the second sample program ManualModelling. If you have time, you could provide a more interesting collection of objects -- see component 4 below. Your interface need provide only relatively limited object placement capability. For example, only one object of each allowable type, with a standard size and colour particular to the type, could be placed for each object type. You may wish to include a separate viewport displaying a view of the floor from directly above in order to facilitate placement of the objects. You should also provide some basic lighting for the room. For example, define a single light source, and assign appropriate properties to it and the materials. 3. (10 marks) User initiated animation Provide an interface which enables the user to initiate an animation sequence. A user could then nominate an object in the room, resulting in the robot moving (gliding) to the object, picking it up, moving (gliding) to the table, placing it on the table, and finally returning to the starting position. The interface for object selection could be a simple one -- one which uses either the keyboard or a mouse button, for example. (If you have time, you could allow the user to choose the desired object by clicking on the object in the scene -- see component 4 below.) Gripping of objects need not be too realistic. Also, collision avoidance need not be a concern unless you have time (see component 4 below). 4. (8 marks) Further features Time permitting, you could provide further features such as: o further use of lighting and shading o use of textures o a more detailed or more realistic robot o a more realistic room and a more interesting collection of objects o object selection within the scene using the mouse o a viewport on the screen displaying a robot-eye view which changes in response to the movement of the robot o collision avoidance As a rough guide, each of the above will earn you approximately 2 marks, up to a maximum of 8 marks for this component. 5. (4 marks) Coding style Four marks will be awarded for good coding style, including such aspects as modularity, understandability and reusability. 6. (2 marks) Documentation Two marks will be awarded for good documentation. This does not have to be extensive; but please inform the user (marker) about the keyboard commands, mouse actions, etc. that are available, unless they are clear to a user simply by looking at the screen upon starting up. Documentation could be supplied as part of your electronic submission. Submission Please submit an exported eclipse project in a .zip file to iLearn by the due date. Do not include your executable program. Your documentation can be included in your project folder. Please format the .zip file as "COMP330_A3_[your student number].zip".