MyQem

Mesh simplification using Quadric Error Metrics written in C#/.NET.

For more information about the algoritm check out the paper https://www.cs.cmu.edu/~./garland/Papers/quadrics.pdf

Purpose

This program can be used to simplify a triangular mesh to target number of triangles or using quality multiplier, the relationship is as follows:

Quality * Input model tris count = Target tris count

Input mesh has to be in STL file format (.stl). Output mesh will also be in that format.

Installation

This is a dotnet global tool, for installation simply type in terminal:

dotnet tool install --global qem

You need to have .NET Core installed on your computer for this to work: https://dotnet.microsoft.com/download

More information about installing and uninstalling global tools: https://docs.microsoft.com/pl-pl/dotnet/core/tools/global-tools

This program is also included in nuget repository: https://www.nuget.org/packages/qem/

For offline installation the nuget package is also included as a release.

Additional information

Compiled and tested using:

• Visual Studio 2019 v16
• .NET Framework v4.6.1
• Windows 10

Usage

In the terminal type:

qem <input file path> <output file path> -q <quality>

or

qem <input file path> <output file path> -t <target triangle count>

• input and output files should have .stl extension
• quality has to be between 0.0 and 1.0
• target tris count cannot exceed input model's tris count

If you do not specify neither quality nor target triangle count, the original model will be simplified by a quality factor of 0.5:

qem <input file path> <output file path>

For more information type:

qem help