scenix v1.5.0 — Controls, Interaction, And Editor Primitives

Scenix v1.5.0 — Controls, Interaction, And Editor Primitives

Scenix 1.5.0 adds the reusable interaction layer needed by product viewers,
scene tools, games, CAD-like applications, and data visualizations. The release
keeps the default facade CPU-first: editor snapshots, egui, GPU picking, and
browser backends remain explicit features.

Highlights

• One allocation-free InputState combines keyboard, pointer, scroll, up to ten
  touch contacts, recognized gestures, four standard gamepads, pointer lock,
  and logical/physical viewport metrics.
• New Arcball, Trackball, Map, FirstPerson, and PointerLock controllers consume
  the same platform-neutral input state. Orbit and Fly controls can use it too.
• SceneGraph now owns deterministic selected/hovered/active state, sparse
  editor metadata, selectable/locked/hidden policy, layer masks, transform
  mode/space/constraints, and snapping configuration.
• BVH-backed marquee/frustum selection, reusable ray result buffers, drag
  planes, cancellable dragging, and translate/rotate/scale transform sessions.
• Retained transform-gizmo geometry with analytic handle hit testing, selection
  outlines, corner bounds, and snap-grid helpers.
• A typed, renderer-independent inspector tree covers scenes, cameras,
  materials, lights, textures, animation mixers, renderer diagnostics, and GPU
  resources. The optional egui feature renders the shared model.
• Optional on-demand WebGPU ID, normal, and depth passes use dense temporary
  IDs, a one-pixel scissor, reusable readback resources, and world-position
  reconstruction. No editor buffers are allocated until first use.
• Browser bindings now forward DPR-aware canvas metrics, touch, gestures,
  pointer lock, relative motion, standard gamepads, transform modes, selection,
  and inspector JSON across WebGPU and WebGL paths.

Small Example

use scenix::{
    ArcballController, InputState, PerspectiveCamera, PointerButton, Vec2, Vec3,
    ViewportMetrics,
};

let mut input = InputState::new(ViewportMetrics::new(Vec2::new(1280.0, 720.0), 2.0));
input.on_pointer_down(PointerButton::Left);
input.on_pointer_move(Vec2::new(32.0, 12.0));

let mut controls = ArcballController::new(Vec3::ZERO, 5.0);
let mut camera = PerspectiveCamera::default();
controls.update_from_input(&input, 1.0 / 60.0);
controls.apply_to_perspective(&mut camera);
input.end_frame();

Feature Flags

• interaction: camera, scene, raycaster, and helper interaction primitives.
• editor: interaction plus typed inspector implementations.
• egui: editor plus the read-only egui inspector adapter.
• renderer: enables on-demand GPU editor picking through Renderer::pick.
• wasm: exposes browser input and editor state forwarding.

Examples

cargo run -p scenix --example controls_showcase
cargo run -p scenix --example selection_and_drag
cargo run -p scenix --example transform_gizmo
cargo run -p scenix --example editor_inspector --features egui
cargo run -p scenix --example renderer_picking --features renderer

Compatibility

• All 17 workspace crates are version 1.5.0 and require Rust 1.89.
• Existing v1.4 APIs and default facade features remain available; the new
  facade bundles are additive and opt-in.
• GPU picking requires the renderer/WebGPU path. WebGL browser rendering keeps
  CPU BVH selection as its compatible fallback.
• The egui adapter is an inspector primitive, not the full application/editor
  shell planned for a later milestone.
• Dedicated benchmarks cover control updates, retained gizmo generation/hit
  testing, and BVH marquee selection into caller-owned output storage.

See the full changelog and
v1.5 guide for API and verification details.