task09

Task09: Laplacian Mesh Deformation (Quadratic Programming, Sparse Matrix)

Deadline: July 4th (Thu) at 15:00pm

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Before Doing Assignment

Install Python (if necessary)

We use Python for this assignment. This assigment only supports Python ver. 3.

To check if Python 3.x is installed, launch a command prompt and type python3 --version and see the version.

For MacOS and Ubuntu you have Python installed by default. For Windows, you may need to install the Python by yourself. This document show how to install Python 3.x on Windows.

Virtual environment

We want to install dependency locally for this assignment.

cd acg-<username> 
python3 -m venv venv  # make a virtual environment named "venv"

Then, start the virtual environment. For Mac or Linux, type

source venv/bin/activate  # start virtual environment 

For Windows, type

venv\Scripts\activate.bat  # start virtual environment

In the command prompt, you will see (venv) at the beginning of each line. There will be venv folder under acg-<username>.

Install dependency

In this assignment we use many external library. We use pip to install these.

pip3 install numpy
pip3 install moderngl
pip3 install moderngl_window
pip3 install scipy

Alternatively, you can install above dependency at once by

cd acg-<username>/task09
pip3 install -r requirements.txt

type pip3 list and then confirm you have libraries such as moderngl, numpy, pillow, pyglet, pyrr, scipy etc.

Make branch

Follow this document to submit the assignment, In a nutshell, before doing the assignment,

• make sure you synchronized the main branch of your local repository to that of remote repository.
• make sure you created branch task09 from main branch.
• make sure you are currently in the task09 branch (use git branch -a command).

Now you are ready to go!

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Problem 1 (Python execution practice)

Run the code with python3 main.py

The program will output out.png. Rename it to out_default.png then it replaces the image below.

This code only move the position of fixed vertex. Let's deform other vertices to make hte deformation smooth!

Problem 2 (smooth deformation with Laplacian)

Write a few lines of code around line #134 to implement smooth mesh deformation using Laplacian.

The program will output out.png. Rename it to out_laplacian.png then it replaces the image below.

Problem 3 (even smoother deformation with Bi-Laplacian)

Write a few lines of code around line #134 to implement smooth mesh deformation using BiLaplacian.

The program will output out.png. Rename it to out_bilaplacian.png then it replaces the image below.

After Doing the Assignment

After modify the code, push the code and submit a pull request. Make sure your pull request only contains the files you edited. Good luck!

BTW, You can exit the virtual environment by typing deactivate in the command prompt.