» CS 488: Lab 6 – Trackball

CS 488: Lab 6 – Trackball

February 26, 2021 by Chris Johnson. Filed under graphics-3d, labs, spring-2021.

Welcome to lab, which is a place where you and your peers complete exercises designed to help you learn the ideas discussed in the preceding lectures. It is intended to be a time where you encounter holes in your understanding and talk out loud with your peers and instructor.

Your instructor will bounce around between breakout rooms to check in with you. However, you are encouraged to request assistance if you find your progress blocked.

Designate one of your group to be the host. This individual will be responsible for setting up a Live Share session in Visual Studio Code and submitting your work. No team member should dominate or be expected to carry the group. All members should be writing code and contributing ideas.

Setup

Host, follow these steps:

Open Visual Studio Code.
Click File / Open Folder, create a new folder, and open it.
With the Live Share extension installed, select View / Command Palette, and choose Live Share: Start Collaborative Session.
Copy the invitation link to your chat.

Non-hosts, join the session.

Task

Your task in this lab is to give the user the ability to spin a torus around using the mouse. Follow these steps to complete this lab:

Implement the Trackball class in trackball.js.
Add an instance of Trackball to your torus renderer. It will need to be initialized in initialize and updated in onSizeChanged and your mouse listeners.
Submit your trackball.js on Crowdsource. Enter the eIDs for your team members. If you need to make changes after you’ve already submitted, just reload the page and resubmit. If you haven’t finished by the end of the scheduled lab time, you are free to continue working. However, the submission must be made before the end of the day to receive credit.