flutter_scene 0.14.2

A general-purpose realtime 3D rendering library for Flutter.

0.14.2

Rendering fixes.

• Fixed mirrored geometry rendering inside-out. A node with a negative-determinant transform (a mirror or negative scale) reverses triangle winding, so its front faces were being culled. Cull winding now follows the sign of the node's world-transform determinant, matching the glTF 2.0 spec (section 3.7.4 Instantiation). Applies to the scene pass, the shadow pass, and instanced draws.
• Fixed material.doubleSided being ignored by the runtime glTF importer. Double-sided materials are no longer back-face culled.

0.14.1

Quality and packaging pass to a full pub.dev score.

• Now WASM-compatible: the build-hook helpers no longer pull dart:io onto the web/wasm dependency graph (they run on the native host only).
• Added a package example and a fuller description.
• Bumped flat_buffers to ^25.9.23.
• Internal: lint and formatting cleanup of the generated flatbuffer readers.

0.14.0

Renderer overhaul. The lighting/material/scene API changed in a few breaking ways (small consumer base, worth getting right). See below.

• Render graph. Rendering is now structured as an ordered list of passes (RenderGraph / RenderGraphPass / RenderGraphContext / Blackboard / TransientTexturePool in lib/src/render/), with a transient-texture pool and a per-frame blackboard. The frame is ShadowPass? → ScenePass → TonemapPass.
• HDR pipeline. The scene renders into a floating-point (r16g16b16a16Float) color target, MSAA-resolved in linear; a full-screen TonemapPass then applies exposure, the tone-mapping operator, and the display EOTF and writes the 8-bit swapchain. Material shaders output linear HDR premultiplied by alpha and no longer tone-map or gamma-encode (breaking for custom ShaderMaterial shaders; see MATERIALS.md).
• Tone mapping & exposure moved onto Scene. Scene.exposure (default 1.0) and Scene.toneMapping (ToneMappingMode, default Khronos PBR Neutral; ACES / Reinhard / linear also selectable). Scene.physicalCameraExposure({aperture, shutterSpeed, iso}) derives an exposure multiplier the photographic way. (Replaces Environment's exposure / toneMappingMode / exposureFromPhysicalCamera.)
• Directional light + shadows. DirectionalLight (direction, color, intensity, shadow knobs), assignable as Scene.directionalLight, layered on top of the image-based lighting with a Cook-Torrance term. When castsShadow is set, a shadow-map pass renders depth from an orthographic light frustum; the PBR shader samples it with 3×3 PCF + normal-offset bias.
• Image-based lighting rework. Diffuse irradiance is SH-9 (computed from the radiance image), specular is a GPU-prefiltered "PMREM-style" roughness-band atlas built once at EnvironmentMap construction (prefilterEquirectRadiance, exported). The PBR shader picked up fp16-safe GGX, sqrt-free Smith visibility, a roughness floor, and Fdez-Agüera multiscatter energy compensation. The old brightness fudges (kEnvironmentMultiplier, the rough-surface blend) are gone.
• Environment class removed. Image-based lighting is now Scene.environment (an EnvironmentMap, defaulting to the new procedural EnvironmentMap.studio()) plus Scene.environmentIntensity (a scalar). PhysicallyBasedMaterial.environment (the per-material override) is now an EnvironmentMap?.
• EnvironmentMap changes (breaking). Always carries a prefiltered atlas + SH-9 (no nullable getters). New: EnvironmentMap.studio() (the built-in procedural studio environment, used as the zero-config default). fromAssets / fromUIImages dropped their irradianceImage params; fromGpuTextures now takes a prefiltered atlas (+ optional SH); empty() is a black atlas + zero SH. The bundled royal_esplanade.png is still available via fromAssets but is no longer the default; the unused royal_esplanade_irradiance.png asset was removed.
• ShaderMaterial.useEnvironment now binds prefiltered_radiance + brdf_lut (not the former radiance_texture / irradiance_texture / brdf_lut).
• Web support. flutter_scene now runs on Flutter web. Where Impeller and Flutter GPU aren't available, it renders through a built-in WebGL2 backend (a drop-in for flutter_gpu), and works under both the CanvasKit and Skwasm web renderers. On native platforms it still uses Flutter GPU at zero cost.
• Single package (breaking for direct importer users). flutter_scene_importer has been folded into flutter_scene and is no longer published separately. Its build-hook helper now lives at package:flutter_scene/build_hooks.dart (buildModels). A curated package:flutter_scene/gpu.dart exposes just the GPU types needed to author custom ShaderMaterial shaders (Shader, ShaderLibrary, loadShaderLibraryAsync, Texture, sampler types); the rest of the GPU layer is internal.

0.13.0

• Add ShaderMaterial, the foundation for custom materials. Supply a fragment shader (compiled offline through flutter_gpu_shaders / impellerc into a .shaderbundle), then bind uniform blocks and textures by name with setUniformBlock / setUniformBlockFromFloats / setTexture. Render-state knobs (cullingMode, windingOrder, isOpaqueOverride) are exposed on the material. The opt-in useEnvironment flag binds the scene's IBL textures (radiance_texture, irradiance_texture, brdf_lut) when the fragment shader declares them.
• Add MATERIALS.md: an end-to-end guide to the engine uniform / varying contract for custom fragment shaders, std140 uniform-block packing, the flutter_gpu_shaders build-hook setup, and the limitations of the current surface (see issue #22 for the planned declarative material format).
• The example app gains a worked toon-shader demo (examples/flutter_app/lib/example_toon.dart).

0.12.0

• Add bounding-volume and frustum-culling infrastructure. The scene encoder now builds a Frustum once per render from the camera's view-projection matrix and skips entire subtrees whose combined local-space AABB lies outside it.
• Skinned subtrees are culled against an offline-baked pose-union AABB that covers every animated pose. The runtime falls through to the always-visible path for skinned content imported via the runtime GLB importer (Node.fromGlbBytes / Node.fromGlbAsset) since the pose-union analysis runs only in the offline importer.
• New public API:
  • Geometry.localBounds, Geometry.localBoundingSphere, Geometry.setLocalBounds(aabb, sphere).
  • Mesh.localBounds (cached union of primitive bounds) and Mesh.markLocalBoundsDirty().
  • Node.combinedLocalBounds (cached union including transformed descendants), Node.frustumCulled (default true), Node.markBoundsDirty(), Node.isVisibleTo(camera, dimensions).
  • Camera.getFrustum(dimensions).

0.0.1-dev.1

• Initial render box.

0.1.0

• Rewrite for Flutter GPU.
• Physically based rendering.
• More conventional interface for scene construction.

0.1.1

• Rename PhysicallyBasedMaterial and UnlitMaterial
• Fix environment lighting problems in PhysicallyBasedMaterial.
• Add default environment map.

0.2.0

• Skinned mesh import.
• Fix readme for pub.dev.

0.2.1-0

• Switch to pre-release versioning.
• Bump version of flutter_scene_importer.

0.2.1-1

• Bump flutter_scene_importer version.

0.3.0-0

• Add Animation/playback support (Animation, AnimationPlayer, and AnimationClip).
• Import animations from scene models.
• Add support for cloning nodes.

0.4.0-0

• Support node cloning for skins.
• Fix default/animation-less pose.

0.5.0-0

• Support non-embedded/URI-only image embeds.

0.6.0-0

• Fix memory leak in transients buffer.
• Optional MSAA support on iOS and Android (enabled by default).
• Cull backfaces by default.
• Fix animation blending bugs.
• Pin native_assets_cli to <0.9.0 (https://github.com/bdero/flutter_gpu_shaders/issues/3)
• Add car model and animation blending examples.
• Fancy readme and FAQ.

0.7.0-0

• Update to native_assets_cli 0.9.0.
• Update to flutter_gpu_shaders 0.2.0.

0.8.0-0

• Update to Flutter 3.29.0-1.0.pre.242.

0.9.0-0

• Update to native_assets_cli 0.13.0.
• Update to flutter_gpu_shaders 0.3.0.

0.9.1-0

• Fix invalid usage of textureLod on desktop platforms.

0.9.2-0

• Fix globalTransform calculation.

0.11.1

• Fix Node.globalTransform setter. The previous implementation computed transform * parent.globalTransform.invert(), but Matrix4.invert() returns the determinant (a double) and mutates the receiver, so this was scalar-multiplying transform by the parent's determinant rather than composing with the parent's inverse. Coincidentally produced correct results when the parent had det=1, but produced garbage for any negative-determinant or non-uniformly- scaled parent.

0.11.0

• Add a runtime GLB importer. Node.fromGlbBytes(Uint8List) and Node.fromGlbAsset(String) decode a glTF binary directly at runtime: no offline .model conversion, no build-hook step. Useful for user-uploaded models, network-loaded assets, and model editors. (#12)
• Bump flutter_scene_importer to ^0.11.0 (pure-Dart .glb → .model build hook; CMake is no longer required).

0.10.0

• Migrate from native_assets_cli (discontinued) to hooks 1.0. Breaking: build hook authors must now import 'package:hooks/hooks.dart' instead of package:native_assets_cli/native_assets_cli.dart. (#82)
• Drop the --enable-experiment=native-assets flag from the importer process invocation. The flag was rejected by Dart 3.10+ and was the literal cause of build failures for users on recent Dart channels. (#82)
• Reorganize the repository as a pub workspace with separate flutter_scene and flutter_scene_importer packages and an examples/ sibling. No user-facing surface changes from this; consumers see a cleaner package. (#36)
• Update flutter_gpu_shaders to ^0.4.0 (also migrated to hooks).