isosurface

A project testing and comparing various algorithms for creating isosurfaces.

In an effort to find the best way of making a dynamic voxel engine, I've been researching new methods of extracting isosurfaces from data sets. I'm making my findings open-source. Some of the code is borrowed/inspired by existing implementations, but most is my own. It's not very optimized and it doesn't have much of a use outside of displaying data, but maybe you'll find some use in it.

See Game1.cs for a more detailed outline. Each class contains at least some documentation containing what it does and what issues it may have (None of the implementations are 100% working according to the original papers).

This requires XNA 4.0 to build and run

Implemented and Mostly Working Algorithms

• 2D Uniform Dual Contouring
• 2D Adaptive Dual Contouring
• 3D Uniform Dual Contouring
• 3D Adaptive Dual Contouring
• Dual Marching Squares (Schaefer's and Warren's) [2D Dual Marching Cubes]

Notes

• The 2D DC implementations don't connect properly; they were my first tests with DC and have some issues, and the adaptive implementation doesn't have simplification
• My QEF solver is hardly a QEF solver; Rather, it takes a set of offsets to apply to the mass point and find the one that has the lowest error, so do not use this as an example of what to do
• The QEF solver is disabled in the 3D DC implementations but can be enabled (simplification needs some tweaks); sharp features will be lost and mesh will be deformed if the error tolerance is high without it
• Dual Marching Squares currently doesn't move the dual grid vertices to their ideal locations to preserve sharp features

Controls

• Space - Adjust quality (ADC3D only)
• Tab - Switch algorithm
• 1 - Toggle mesh visibility
• 2 - Toggle outline/tree visiblity
• 3 - Toggle solid/wireframe/both rasterization
• C - Toggle mouse locking