<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><span id="docs-internal-guid-dc2b871f-a238-d834-51a4-86294f4b4c05"><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">yt 3.0 release notes</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">The yt community is proud to announce the release of yt 3.0.</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">yt (<a href="http://yt-project.org">http://yt-project.org</a>) is an open source, community-developed toolkit for analysis and visualization of volumetric data of all types, with a particular emphasis on astrophysical simulations and nuclear engineering simulations.</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">This release of yt features an entirely rewritten infrastructure for data ingestion, indexing, and representation. While past versions of yt were focused on analysis and visualization of data structured as regular grids, this release features full support for particle (discrete point) data such as N-body and SPH data, irregular hexahedral mesh data, and data organized via octrees. This infrastructure will be extended in future versions for high-fidelity representation of unstructured mesh datasets.</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">Highlighted changes in yt 3.0:</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Units now permeate the code base, enabling self-consistent unit transformations of all arrays and quantities returned by yt.</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Particle data is now supported using a lightweight octree. SPH data can be smoothed onto an adaptively-defined mesh using standard SPH smoothing</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Support for octree AMR codes</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Preliminary Support for non-Cartesian data, such as cylindrical, spherical, and geographical</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Revamped analysis framework for halos and halo catalogs, including direct ingestion and analysis of halo catalogs of several different formats</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Support for multi-fluid datasets and datasets containing multiple particle types</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Flexible support for dynamically defining new particle types using filters on existing particle types or by combining different particle types. </span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Vastly improved support for loading generic grid, AMR, hexahedral mesh, and particle without hand-coding a frontend for a particular data format. </span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * New frontends for ART, ARTIO, Boxlib, Chombo, FITS, GDF, Subfind, Rockstar, Pluto, RAMSES, SDF, Gadget, OWLS, PyNE, Tipsy, as well as rewritten frontends for Enzo, FLASH, Athena, and generic data.</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * First release to support installation of yt on Windows</span><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space:pre;"> </span></span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Extended capabilities for construction of simulated observations, and new facilities for analyzing and visualizing FITS images and cube data</span></div><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"> * Many performance improvements</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">This release is the first of several; while most functionality from the previous generation of yt has been updated to work with yt 3.0, it does not yet have feature parity in all respects. While the core of yt is stable, we suggest the support for analysis modules and volume rendering be viewed as a late-stage beta, with a series of additional releases (3.1, 3.2, etc) appearing over the course of the next year to improve support in these areas.</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">For more information, including installation instructions, links to community resources, and information on contributing to yt’s development, please see the yt homepage at <a href="http://yt-project.org">http://yt-project.org</a> and the documentation for yt-3.0 at <a href="http://yt-project.org/docs/3.0">http://yt-project.org/docs/3.0</a></span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">yt is the product of a large community of developers and users and we are extraordinarily grateful for and proud of their contributions. yt 3.0 features contributions from over 60 individuals, constituting almost 5000 commits. For many contributors, this is the first release featuring their work.</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">Please forward this announcement on to any interested parties, and look for information soon about upcoming workshops focused on yt and applying it to your data.</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">Thank you,</span></div><br><div style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;">The yt development team.</span></div><div><span style="font-size: 15px; font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"><br></span></div></span></body></html>