Fry3DX 0.4: an easy 3D modeller

Shapes with live settings, shape editing, knife and hole tools, drawing
shapes onto other objects, combining objects (add / subtract / overlap),
copies, thickness, painting with stickers and layers, a Layout tab, a
Print tab with checks, packed .fry files with autosave, export to GLB,
glTF, FBX, OBJ, 3MF, STL and PLY, folders in Layers, its own crash
screen, and a website for GitHub Pages in docs/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NMSrd5oe1GpUD7E6d825KP

engine/audio/audio.h

@@ -0,0 +1,45 @@
+#pragma once
+#include <string>
+#include <vector>
+// Sound output (miniaudio). Files load through the VFS: .opus (Ogg Opus, what
+// assetc produces and the game ships) plus .wav/.flac/.mp3 for convenience.
+// Everything streams, so long music costs no more memory than a short sound.
+// World space matches the renderer: Z up, game units.
+#include <glm/glm.hpp>
+
+#include <optional>
+#include <string_view>
+
+namespace keel::audio {
+
+// noDevice: mix without an output device (tests, headless); read with readFrames.
+bool init(bool noDevice = false);
+void shutdown();
+bool active();
+
+// Call once per frame: places the listener and frees finished sounds.
+void update(const glm::vec3& listener, float yaw, float pitch);
+// Silences everything while the window is in the background (snd_mute_losefocus).
+void setFocused(bool focused);
+
+// One-shot sound; with a position it's 3D, otherwise it plays flat (UI, local).
+// Hot reload: sounds whose files changed are read again on their next play. Returns their paths.
+std::vector<std::string> reloadChanged();
+void play(std::string_view path, std::optional<glm::vec3> position = std::nullopt, float volume = 1.0f);
+// fadeMs: rises from silence over that long.
+void playMusic(std::string_view path, bool loop = true, int fadeMs = 0);
+void stopMusic();
+// A looping background sound (rain, wind) at a volume, set every frame or when it changes;
+// 0 stops it. It eases to the new volume rather than jumping.
+void setAmbience(std::string_view path, float volume);
+// A looping sound at a place (a car's engine), by key: set it every frame, with its volume and
+// pitch (1 as recorded); volume 0 stops it. Keys not set for a second stop by themselves.
+void setLoop(int key, std::string_view path, const glm::vec3& position, float volume, float pitch);
+// Stops every sound playing (not the music): an editor's Stop.
+void stopSounds();
+int playingCount();
+
+// Headless mixing (init(true)): stereo float frames at 48 kHz.
+void readFrames(float* out, int frames);
+
+} // namespace keel::audio