Some bugfixes and minor additions from 2.6:

• Unbreak ground shadows
• Fix some bounding box numerical issues for degenerate scenes
• Adjust transform gizmo background color
• Wireframe visualization for sparse grid structures

Python

• Add (very beta) support for Gaussian splats, via the gsplat library. See https://github.com/nmwsharp/polyscope-py/blob/master/test/scripts/gaussians_demo.py

Polyscope v2.6 Release notes (C++ & Python)

Core Library

• Improvements to basic navigation and camera motion
  • Change default panning behavior: turntable center moves as you pan the camera (thanks @Kiord)
  • Double-clicking on a point in the scene to recenter the camera!
• Add new sparse volume / sparse voxel grid structure type
• Added a new (optional) onscreen colorbar, which looks more like a typical traditional colorbar and is shown directly on the screen
  • Added function to export the colorbar to an .svg file for creating figures
• Rework the Transformation Gizmo, use ImGuizmo to render it, add many more options for customizing the Gizmo transformations (rotation/translation only, etc)
  • Allow arbitrary additional user-created Transformation Gizmos to manipulate transforms/positions in custom UIs
• Added functions to create/get/manipulate slice planes with custom names (thanks @merlinND)
• Add a callback to drag-and-drop files into the Polyscope window (thanks @merlinND)
• Update ImGui v1.91.9b --> v1.92.5
• Rework support for multiple contexts with ImGui+GLFW
• Change the way font loading and custom fonts work (breaking change for advanced users only)
• Add Icon fonts for use with ImGui (currently internal, not yet exposed to end users)

Python

• Move python bindings to nanobind, add type hints for almost everything (thanks @wjakob)
• Re-generate ImGui bindings, bind essentially all of ImGui and ImPlot (thanks 🤖)
• Add Python bindings to all slice plane functions (thanks @merlinND, @xiangdonglai)
• Add Python bindings to configure imgui styles from Python (thanks @merlinND)
• Wheels are now published for Python 3.9-3.14 (dropped end-of-life 3.7 & 3.8, as well as pypy builds)

Misc Bugfixes / Tweaks

• Screenshots with the ImGui UI enabled are remarkably hard. Disable the old broken behavior, improve docs for what does work. (thanks @mengf821)
• Fix a camera bug when the turntable view nearly aligns with the vertical axis
• Fix several rendering bugs when using the orthographic camera (thanks @xarthurx @renanbomtempo)
• Bindings fixes (thanks @ningnawang @BrunoLevy)
• Rendering related crash with camera views after adjusting view widget properties
• Surface mesh tangent vector rendering was briefly broken
• Fix VolumeGrid isosurface indexing for non-uniform dimensions (thanks @danhambleton)
• UI tweaks

Contributors

• @wjakob
• @xarthurx
• @danhambleton
• @merlinND
• @ningnawang
• @BrunoLevy
• @mengf821
• @xiangdonglai
• @renanbomtempo
• @Kiord

What's Changed

• Support ui scaling for high-DPI displays, improve text clarity on high-dpi displays (thanks @BruegelN!)
• Add a ctrl/cmd + shift-click to focus and orbit around region-of-interest, programmatic support for view orbit centers #350
• Add ImPlot for creating 2d plots in the UI (and corresponding Python bindings)
• Smarter, configurable logic for timing the main loop with frameTick(), including skipping ticks to hit framerate
• (python) remove cupy as a dependency for on-gpu buffer updates
• Add variable curve network radius on edges #351
• Add infrastructure for quantity picking, fix bug with render images being ignored when picking #354
• Fix buggy transparency for RenderImages with all-black pixels
• Update imgui to v1.91.9b #338
• Other various bugfixes, documentation improvements, bindings (thanks @phaedon,@kenshi84!)

New Contributors

• @BruegelN made their first contribution in #326

Full Changelog: v2.4.0...v2.5.0

Contributors

• @kenshi84
• @phaedon
• @BruegelN

What's Changed

• Add support for headless rendering with EGL on linux
• Overhaul selection / picking to be much easier to use and more general
• Add support for categorical scalar quantities (labels/segmentations/flags/etc)
• add ARM builds to Python wheels @johnnynunez
• support a proper shutdown flow
• check & warn for inf/nan values in input
• contour line scalar shading, add more perceptual colormaps by @keenancrane
• expose texture filtering options for surface mesh texture quantities
• add a convenience adder for curve networks which are a collection of line segments

Bugfixes etc

• Fix autoscaling of structures. by @patsytau in #304
• Repaired README example for point clouds by @amock in #294
• use std::vector::data() when setting GL data by @gkoulin in #300
• remove deprecated keycode functions
• fix histogram rendering bugs by tracking buffers which must be preserved for imgui render
• fix a bug where saving/restoring views to the clipboard was broken on linux

New Contributors

• @amock made their first contribution in #294
• @gkoulin made their first contribution in #300
• @patsytau made their first contribution in #304
• @keenancrane made their first contribution in #317

Full Changelog: v2.3...v2.4.0

Contributors

• @keenancrane
• @amock
• @patsytau
• @johnnynunez
• @gkoulin

What's Changed

• implement per element transparency for meshes and point clouds
• add option to set ground plane location in world coords
• bugfix to redraw when toggling-off the enabled setting for quantities

Full Changelog: v2.2.1...v2.3

Bugfixes:

• Properly update backend name when using auto backend
• Compile fix for bad sizeof() usage

Significant Additions

• Experimental EGL backend for headless rendering on some platforms
• Update ImGui to 1.90.4 and glm to 1.0.1
• Move glm to a git submodule
• Change path to nlohmann/json dependency
• Update CMake to use modern targets, handle cases where an outer library already provides the dependencies
• Many bugfixes

What's Changed

• Fix texture scalar UI name in #254
• fix indexing bug for surface textures from vertex param in #255
• Make FPS camera navigation speed independent from frame rate by @FeatherAntennae in #252
• Rename json->nlohmann for consistency with standard use of 3rd party lib by @phaedon in #251
• explicit buffer vs screen coords for picking & screen-space ops in #259
• fix indexing bug for surface textures from vertex param in #262
• Update ImGui to 1.90.4 by @jdumas in #260
• Update CMake dependencies to rely on proper targets by @jdumas in #261
• refactor globals into a context object by in #265
• bugfix for camera pick missing normal buffer crash (fixes #264) in #267
• add EGL backend for headless rendering on linux in #266
• Update glm to 1.0.1 by @jdumas in #263
• Add windowRequestsClose() for frameTick() loops
• Fix bug in volume grid isosurface coordinate order

New Contributors

• @FeatherAntennae made their first contribution in #252
• @phaedon made their first contribution in #251
• @jdumas made their first contribution in #260

Full Changelog: v2.1.0...v2.2.0

Contributors

• @jdumas
• @phaedon
• @FeatherAntennae

Make scalar minimax limits persistent

adds a missing surface mesh register variant w/ permutations for compatibility

This represents a whole bunch of changes that had accumulated over the past >2 years.

Key new features:

• New structure: Camera View. Represents a camera in the scene, add images/renderings and view them through the camera's perspective.
• New structure: Volume Grid. Values on the nodes or cells of a regular grid in 3D space. Visualize with slices through the grid, or view levelsets via marching cubes.
• New quantity: color & scalar images. These are a new kind of 'floating' quantity, add them to the whole scene, or to any structure.
• New quantity: render images. Images that represent renderings of the scene, and can depth-composite with other content, etc.
• New quantity: mesh texture images. Texture-mapped color and scalar values on meshes.
• Alternate control flow method for simulations & interactive apps that already have a main loop.
• Flat material circumvents shading & tonemapping to display colors onscreen exactly as specified.
• More helper functions for manipulating views and getting info about mouse clicks.
• C++ data adaptor taking {ptr, size} to from any flat buffer for adding structures & quantities.
• Surface Meshes no longer let you select halfedges/edges by default
• Big backend perf & memory improvements. Added shader cache. Total rewrite of backed data management, so we never store duplicate copies of data. Updating data in a tight loop should be much faster now.
• Beta/partial/undocumented support for directly updating buffers from the GPU without a CPU round-trip.
• Cleaned up docs website to scale better to more content. New FAQ section.

Just a few small breaking changes:

• Rename intrinsic vector quantities to tangent. Change interpretation of symmetric data. Track bases per-quantity rather than per-structure.
• Remove ability to set vertex- and face- permutations for surface meshes.
• Remove poorly-supported surface mesh quantities: surface graph (superseded by Curve Network), count quantity, subset quantity