Yutani-Building-better-worlds

A high-performance, multi-threaded 3D Sandbox & Multimedia Framework for Delphi. Powered by Jolt Physics, Raylib, R3D, SDL3, MiniAudio, TinySoundFont, libmpv, RecastNavigation, VerySimpleLua, GameNetworkingSockets, and Skia4Delphi.

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README

Yutani-Building-better-worlds (Alpha v0.649)

A high-performance, multi-threaded 3D Sandbox & Multimedia Framework for Delphi.
Powered by Jolt Physics, Raylib, R3D, SDL3, MiniAudio, TinySoundFont, libmpv, RecastNavigation, VerySimpleLua, GameNetworkingSockets, and Skia4delphi.

yutani_wallpaper3

Sample video: https://youtu.be/uUjvsre8F4g
(thats the sf2 used in sample video "FluidR3 GM.sf2" get it at https://github.com/urish/cinto/tree/master/media ❗

Welcome to Yutani, a cutting-edge, fully asynchronous 3D Multimedia & Physics Engine written from scratch in Object Pascal.

This framework breaks the boundaries of traditional Delphi development by fusing industry-standard C-libraries into a highly optimized, thread-safe VCL sandbox ecosystem. No bloated form-designers, no legacy overhead—just pure, high-performance spatial engineering.
Started as "sample" in Joltphysics4delphi repo, it got a bit too big, it had to get its own name.

💡 A personal note: To be completely honest, I don't know how far I can get this thing since I am still learning 3D development—I've only been doing real 3D dev for about a month now! But I love the challenge, it's mutating into a giant powerhouse, and I try to push it as far as I possibly can. (And for the first time, I think playing Second Life wasn't totally useless :D)

🛠️ The Tech-Stack Powering the Core:

3D Physics Core: Powered by Jolt Physics via a robust, custom multi-threaded wrapper with precise continuous collision detection (CCD).
Blazing Fast Rendering: Driven by Raylib & r3d, utilizing custom GLSL shaders for advanced lighting and shadows directly on the GPU.
Procedural Textures & HUD : Fully generated via Skia4Delphi inside memory buffers for crisp, transparent, high-DPI vector interfaces.
Cinematic Multimedia: Integrated libmpv engine streaming hardware-accelerated video feeds straight into real-time 3D OpenGL textures.
Input Layer: Multi-threaded SDL3 Gamepad Core featuring button mapping and zero-latency feedback.
Advanced Audio Engine: A high-performance Tri-engine setup providing complete, asynchronous acoustic control. MiniAudio drives the low-level hardware communication, real-time 3D spatial sound, and HRTF room attenuation. TinySoundFont handles on-the-fly SF2 synthesis for dynamic music sequences and retro soundtracks. SedaiAudio completes the trio as a procedural sound-design laboratory, delivering real-time synthesis (FM, Subtractive, Additive, Wavetable) and Karplus-Strong physical modeling for generative sound effects without asset overhead. (Note: SedaiAudio is interfaces dynamically via sedaiaudio.dll under GPL-3.0, keeping the core Yutani engine framework under Apache-2.0).
AI Pathfinding & Navigation: We will use RecastNavigation for automated 3D NavMesh generation directly from Jolt geometry, allowing smooth asynchronous entity pathfinding.
Dynamic Gameplay Scripting: Embedded VerySimpleLua engine to script entity logic, triggers, and game rules at runtime without re-compiling the core.

Status: Work in Progress (Alpha v0.649)

Unbenannt

✨ Features

🦾 Core Physics System (Jolt Physics)

World Simulation: Full asynchronous physics initialization, automated broadphase optimizations, and gravity control.
Rigid Bodies: Complete state synchronization (Static, Kinematic, Dynamic) with seamless position, rotation, and custom scale transformations.
Collision Shapes: Native wrappers for Box, Sphere, Capsule, Cylinder, Tapered shapes, Convex Hulls, Compound shapes, Meshes, and Heightfields.
Physics Interactions: Real-time application of forces, torques, linear/angular impulses, and precise velocity controls.

🔍 Advanced Collision & Queries

3D Raycasting: Screen-to-world raycasting for precise object grabbing, context selection, and mouse interaction.
Shape Casting (Sweeps): Advanced CastShape and CollideShape implementations for swept-sphere and swept-capsule testing, crucial for smooth character navigation.
Table-based Layering: Explicit object filtering via highly customized BroadPhase and ObjectLayer tables.
Collision Groups: GroupFilter and SubGroupID management to enforce complex collision rules (e.g., ignoring attached attachments or inner ragdoll constraints).

🚀 Complex Engine Subsystems

Virtual Characters & Avatars: Fully integrated CharacterVirtual bindings with customized step-up/stair-walking algorithms and isolated rotation axis constraints (locking X/Z to keep characters perfectly upright).
Ragdolls & Skeletons: Full skeleton joint hierarchy mapping (Hinge, SwingTwist, Cone) with runtime ragdoll activation/deactivation.
Vehicles: Deep controller mechanics supporting engines, transmissions, anti-roll bars, differential gears, and custom track/wheel physics for cars and motorcycles.
Soft Bodies: Foundation for deformable objects built directly from custom vertex and edge maps.
AI Navigation & Pathfinding (Recast/Detour): Automatic voxelization of 3D world meshes into walkable NavMeshes. Intelligent spatial steering, agent avoidance, and dynamic corridor paths for virtual entities.
Runtime Scripting Interface (Lua): Full binding layer exposing engine functions, entity transforms, and sound triggers to lightweight Lua scripts for instant gameplay prototyping.

🎮 Input & Spatial Audio (SDL3, MiniAudio & TinySoundFont)

**Threaded Input Core: Multi-threaded SDL3 Gamepad integration supporting hot-plugging, custom axis mapping, and deadzone stabilization.
**3D Positional Acoustics: Audio rendering via MiniAudio4Delphi for real-time sound attenuation and space-aware acoustic feedback on physics impacts.
**Dynamic Soundtrack Synthesis: Integration of TinySoundFont4Delphi allowing on-the-fly MIDI sequencing and .sf2 SoundFont playback directly within the 3D environment.

🪐 Multimedia & Video Pipeline (libmpv)

Direct GPU Texture Mapping: Utilizes libmpv's native OpenGL context rendering (libMPV.Render_gl.pas) to stream video feeds directly into Raylib 3D textures without crushing CPU or VRAM bandwidth.
Spatial Interactive Screens: Interact with floating video panels using raycasts, move them in 3D space, and toss them around with Jolt physics while videos keep playing live.

🎨 Procedural UI, HUD & Texturing (Skia4Delphi)

Zero-Image Architecture: Entirely procedural 2D/3D asset pipeline. No heavy .png or .bmp files needed—everything is drawn mathematically in memory.
High-DPI Vector HUD: Crisp, modern, transparent HUD elements and custom menus drawn via Skia, avoiding restrictive legacy Win32 VCL styling blocks.
Procedural 3D Textures: Generate dynamic signs, indicators, and textures on the fly and map them directly onto Jolt rigid bodies.

🛠️ Editor, Environment & Tooling

Full Local Gizmo System: Local-space Translate, Rotate, and Scale Gizmos (toggled via CTRL) that scale dynamically to remain grabbable at any distance.
Object Inspector (RTTI): Fully asynchronous property editor using Delphi RTTI. Modify Mass, Friction, Restitution, Scale, and Position live from a dark-themed TStringGrid.
Safe Editing System: Dynamic detach-on-grab mechanism that safely pulls bodies out of the physics simulation during gizmo scaling and safely re-attaches them without physics jitters.
Advanced Shading & Weather: Custom GLSL shaders for real-time ambient/diffuse shading, moving procedural cloud layers, a horizon-to-zenith gradient skybox, and a full Day/Night progression cycle.
Dynamic Fake Shadows: Shadow maps that scale in size and fade out realistically based on an object's Y-height.

Unbenannt
My first spaceship 🤤
slowly getting ready to explore the new universe

💡 Instabile warp drive reactors: Interstellar flights are currently strictly experimental. The current warp drives cause severe local reality distortions and cognitive perception warps. Planets moving at hyperspeed are not a bug—it’s just the engine frying your brain. Use at your own risk!

⌨️ Controls

CTRL: Toggle between Move / Rotate / Scale Gizmos
Middle Mouse Click + Drag: Rotate Editor Camera
WASD: Move Editor Camera
Mouse Wheel: Zoom In / Out
ALT + Q / E: Select previous / next Actor in Hierarchy
F10 on selected send alive highlighter
ALT + Left Click — Change focus target of the Third-Person camera to the clicked surface point
F2 Split screen mode
---vehicles---
F11 posess whatever selected as vehicle & rotate
Shift & F11 Change control type
F12 leave posessed vehicle
CTRL show/hide mouse cursor
W / S — Pitch (Tilt Up / Down)
A / D — Yaw (Turn Left / Right)
R / F — Throttle / Speed Up / Speed Down
Q / E — Fly up / Down

Exe and sample project included

Latest Changes:

v0.649:

Refactored TPiano class out of Yutani.Core into Yutani.VCL3D
Sandbox no longer owns a FPiano reference; TPiano is now instantiated and owned by the caller via TVCL3D.SpawnPiano
Piano gizmo linking now uses Name='PianoBody' + IsPianoKey scan instead of the FPiano pointer, so the feature keeps working without the sandbox knowing about TPiano
Added TVCL3D.SpawnTrackbar and TVCL3D.SpawnProgressBar std controls alongside the existing SpawnButton
Added new shape types stTrackbar and stProgressBar to TShapeType. Both render as a composite actor (dark base block + protruding front part) styled like the existing stButton.
Added generic published Integer property 'ItemPosition' on TA3DComponent. For stTrackbar / stProgressBar this holds the current value as a 0..1000 promille (caller maps to Min..Max). For other actors the field is unused and free for any future integer state the caller wants to attach to an actor.
3D Trackbar is now fully interactive: click+drag the knob to change ItemPosition live (mouse X maps to 0..1000 promille).
3D Progress Bar is driven externally via ItemPosition (use TVCL3D.SetProgressBarValue or the Object Inspector).
F12 now leaves posessed object, split screen moved to F2
Moved holodeck & Land in single units Yutani.Worlds.Land, Yutani.Worlds.Holodeck
Added world bones unit Yutani.Worlds.YourWorld
Added unit Yutani.Worlds.WorldTransitions
New world Transition effects: Warp, BlinkEye, Fade
New Engine tab Combobox for transition effect setting
Space reset/load/save functions added
Space radar minimap now real 3d & added zoom btns
Alt + Q/E now for select object
Ctrl while in vehicle/avatar shows/hides mouse cursor
Added checkbox beside Wall spawn btn for bomb on/off

Unbenannt

v0.648:

v0.647:

Added a skia4delphi rendered, threaded, transparent holographic loading screen overlay for world transitions.
Moved heavy procedural planet texture generation to on-demand loading to fix startup freezes.
Made the loading screen trigger its own asynchronous fade-out and self-destruct without blocking the render loop.
Added a skia4delphi rendered sci-fi particle stream intro from the logo to form the "YUTANI" text.
Implemented floating origin system to eliminate physics jitter on planet surfaces
Added Solar System generation with suns, orbiting planets, moons, and proper lighting (Darksides)
Implemented dynamic sun lighting with Shader integration for planet models
Added comet collisions triggering surface impact particle bursts
Added slow-motion compatibility (TimeScale) for space simulation
Refined star distribution with cluster-based generation and galaxy-style coloring
Added Landing Autopilot System (F9): Smooth cinematic approach to planetary surfaces
Added Planetary Surface Camera Mode: Walk on Mario-Galaxy style little planets with correct surface normals and straight horizons
Added Planetary Orbit Cam (F8) for construction and building mechanics
Added Second Life style ALT+Click focus camera system
Added vehicle flight control system (F11): Possess any object and fly it with WASD/QERF physics thrust with a rigid Third-Person camera
Refactored startup intro to form the logo and text entirely from a dynamic Skia4Delphi particle stream.

v0.646:

Added space skybox
Removed space skybox, built real infinite procedural cosmos (Yutani.Worlds.Space: star sprites, nebulae, comets, planets)
Added Yutani.Worlds.Space.Textures: Skia-rendered procedural planet surfaces (Rocky, Earth, Mars, Gas Giant, Ice)
Planets are now textured 3D spheres (Mario Galaxy scale)
Comets now spray hundreds of flame particles (white-hot → dark red)
Nebulae use circular gradient billboards
Atmosphere glow uses two-layer circular billboards
Far plane extended to 10000 during space rendering
Stars use 4-pointed gradient sprites with twinkle
Chunk-based infinite procedural generation (deterministic per chunk)
Added SQLite.dll cause I think I Need it...later :D

Unbenannt

v0.645:

pascal

Added new yutani.render.nanofog unit

https://github.com/user-attachments/assets/b9df7c07-8160-479a-8271-9885242cc695

v0.644:

pascal

Changed beam spawn effect to new particle materialization 
Added button dematerialization - demat actual object
Added functions: DematerializeSelectedObject,  DematerializeActor(Actor: TA3DComponent)

v0.643:

pascal

Fixed 3D Model Gizmo Resizing    
Scene Save/Load: The physics state (IsStatic) is now correctly serialized and restored.    
Added sample Scene. Load it, and objects falling down like i paused them here.    
Enhanced Slow Motion System: Added property and trackbar to dynamically adjust the exact slow-motion speed multiplier (0.05x to 1.0x) on the fly.    
Added Yutani.AliveHighlighter3d Select object, press F10 to send or Hide    
Added unit Yutani.Worlds.Island - WorldBase Island now partly working   
Added unit Yutani.Render.Particles and already working too   
Added fog button, 10k particles spawn  
Added particles on bomb explosion

v0.642:

pascal

Fixed textures black or blueish on 3d models from far distance       
Fixed spawned 3d model now same size like ghost preview     
Added new gizmo mode Uniform Scale (Corner Resize)        
Raised tinysoundfont thread idle timeout from 2s to 5s to allow sustained notes (e.g., piano) to fully decay and ring out without being abruptly cut off.        
Integrated Yutani.VoronoiFracture: Dynamically generates real 3D Voronoi fragments when destructable objects take heavy impact. The system now successfully creates custom Raylib meshes with lighting, injects them into the Jolt Physics engine, and applies explosion forces.     
Note: Fracture system is basically working now, but fragment rendering 
(some transparency/normal issues) and physics colliders (misalignment, floating, minor jitter) 
are not fully correct yet and require further headaches. :P

v0.641:

pascal

Added 3d working piano connected to tinysoundfont    
Added loadsoundfont btn in audio tab
Added unit yutani.audio

Unbenannt

v0.64:

pascal

Added TWorldBaseType = wbLand, wbSpace, wbHolodeck, wbIsland
Added WorldBase selection combobox in engine tab
Added TSpawnEffectType = spefNone, spefBeam, spefFade
Added Checkbox chkAntialias
Added Spinedit to set Gravity
Added isDestructable Checkbox and property in TA3DComponent/SpawnREquest
Improved Lighting System Reworked the GLSL light shader to prevent color washing on lit surfaces. Lighting is now calculated multiplicatively, preserving deep blacks and vibrant base colors while ensuring shadows darken surfaces correctly.
Added Yutani.VoronoiFracture unit

v0.63:

pascal

Added Fullscreen btn, 
Added Audio tab, Master Volume Control Trackbar &  Audio test btn
Added TinySoundFont wrapper & dll
Added RecastNavigationDelphi Units
Added VerySimple.Lua Units & dll
Added GameNetworkingSockets4delphi wrapper & dlls

v0.62:

pascal

Changed project name for new single repo out of the joltphysics wrapper repo
Added MRX Gamepad Core & SDL3.dll
Added new Tab Controls
Added skia4delphi rendered splash intro
Added OnActorDestroyed event
Fixed bombs not getting removed after explode

Unbenannt

700 fps on rtx 2060s... not bad :D

Get mpv2 dll: https://sourceforge.net/projects/mpv-player-windows/

3D Test Models by https://kenney.nl/

🌐 Recommended 3D Model Sources

Looking for more .glb / .gltf assets to test in the sandbox? Check out these awesome free resources:

📄 License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details. This protects the core Yutani Engine assets, graphics, and unique architecture configurations while enabling powerful open-source expansion.

"The engine is the code you write." — John Carmack.

🛸 Trivia / Easter Egg

Fun Fact: The very first custom 3D .glb model successfully loaded and simulated into this engine's pipeline was the iconic M577 Alien APC. So choosing the name Yutani wasn't just a random sci-fi choice—it was practically hardcoded by fate! 🪐
and btw... yes, my little asus ux305ca with fanless intel m3 does even this still, space scene running 100fps
Cultural Note: In Japanese, Yutani (由谷) translates to "Valley of Origin"...

Unbenannt

First 14 days ... not posted it anywhere... Delphi/Pascal is alive and kickin

Name: Yutani-Building-better-worlds
Address: github.com/lamitaone/yutani-building-better-worlds
Kind: Library
Works with: Delphi
Forge: GitHub
Owner: LaMitaOne
Status: Active
License: Apache-2.0
Created: 9-27-2026
Last pushed: 11-4-2026
Last seen (UTC): 2026-11-05T23:32:16Z
GitHub stars: 3

Games and Game Engines

Topics: 3d-engine 3d-environment delphi game-development gamenetworkingsockets jolt-physics libmpv lua miniaudio path-tracing physics-engine r3d radstudio raylib recastnavigation sandbox-environment sdl3 skia4delphi tinysoundfont voronoi

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README

Yutani-Building-better-worlds (Alpha v0.649)

🛠️ The Tech-Stack Powering the Core:

✨ Features

🦾 Core Physics System (Jolt Physics)

🔍 Advanced Collision & Queries

🚀 Complex Engine Subsystems

🎮 Input & Spatial Audio (SDL3, MiniAudio & TinySoundFont)

🪐 Multimedia & Video Pipeline (libmpv)

🎨 Procedural UI, HUD & Texturing (Skia4Delphi)

🛠️ Editor, Environment & Tooling

⌨️ Controls

🌐 Recommended 3D Model Sources

📄 License

🛸 Trivia / Easter Egg

Yutani-Building-better-worlds