Multi-Platform Export

Compile a single HoloScript scene to 25+ platforms — game engines, web, robotics, IoT, and spatial computing.

The Same Source, Everywhere

// scene.holo — write once
composition "Interactive Scene" {
  environment {
    skybox: "studio"
    ambient_light: 0.6
  }

  object "MagicOrb" {
    @grabbable
    @throwable
    @physics
    @glowing

    position: [0, 1.5, -2]
    color: "#00aaff"
    glow_intensity: 1.0

    on_grab {
      this.glow_intensity = 3.0
      haptic_feedback("dominant", 0.5, 80ms)
    }
  }

  object "Platform" {
    @collidable
    position: [0, 0, -2]
    scale: [4, 0.2, 4]
    color: "#333344"
  }
}

Export Targets

Game Engines

# Unity — C# MonoBehaviours
holoscript compile scene.holo --target unity --output ./UnityProject/Assets/

# Unreal Engine — C++ header + source
holoscript compile scene.holo --target unreal --output ./UnrealProject/Source/

# Godot 4 — GDScript
holoscript compile scene.holo --target godot --output ./GodotProject/scenes/

Web / XR

# Three.js — JavaScript with WebXR
holoscript compile scene.holo --target threejs --output ./web/src/

# Babylon.js — TypeScript
holoscript compile scene.holo --target babylon --output ./babylon/src/

# WebGPU — TypeScript with WebGPU API
holoscript compile scene.holo --target webgpu --output ./webgpu/src/

VR Platforms

# VRChat — UdonSharp scripts + prefabs
holoscript compile scene.holo --target vrchat --output ./VRChatWorld/Assets/

# visionOS — Swift/RealityKit
holoscript compile scene.holo --target visionos --output ./XcodeProject/

# Android XR — Kotlin/Jetpack XR
holoscript compile scene.holo --target androidxr --output ./AndroidProject/

# iOS AR — Swift/ARKit
holoscript compile scene.holo --target ios --output ./iOSProject/

# OpenXR — C++/OpenXR API
holoscript compile scene.holo --target openxr --output ./openxr/src/

Robotics & Digital Twins

# URDF — ROS 2 robot description
holoscript compile scene.holo --target urdf --output ./ros2_ws/src/

# SDF — Gazebo simulation
holoscript compile scene.holo --target sdf --output ./gazebo/worlds/

# DTDL — Azure Digital Twins
holoscript compile scene.holo --target dtdl --output ./adt/models/

# W3C WoT — Thing Descriptions for IoT
holoscript compile scene.holo --target wot --output ./iot/td/

# USDA — Pixar/Apple/NVIDIA OpenUSD
holoscript compile scene.holo --target usda --output ./usd/

# WASM — WebAssembly binary
holoscript compile scene.holo --target wasm --output ./wasm/

Programmatic Export

import { HoloScriptPlusParser } from '@holoscript/core';
import { unityCompiler } from '@holoscript/core';
import { godotCompiler } from '@holoscript/core';
import { vrchatCompiler } from '@holoscript/core';
import { urdfCompiler } from '@holoscript/core';

const parser = new HoloScriptPlusParser();
const { ast } = parser.parse(source);

// Compile to multiple targets at once
const targets = [
  { name: 'unity', fn: unityCompiler },
  { name: 'godot', fn: godotCompiler },
  { name: 'vrchat', fn: vrchatCompiler },
  { name: 'urdf', fn: urdfCompiler },
];

for (const { name, fn } of targets) {
  const result = fn(ast);
  console.log(`${name}: compiled ${typeof result === 'string' ? result.length : 'ok'} chars`);
}

Trait Coverage by Target

Not every trait maps to every platform. Here's a summary:

Trait	Unity	VRChat	Three.js	URDF
@grabbable	✅ XRGrabInteractable	✅ VRC_Pickup	✅	❌
@physics	✅ Rigidbody	✅	✅ Cannon.js	✅ inertia
@networked	✅ Netcode	✅ UdonSynced	✅ WebSockets	❌
@glowing	✅ Emission	✅	✅	❌
@spatial_audio	✅ AudioSource	✅ VRC_Audio	✅ Web Audio	❌
@collidable	✅ Collider	✅	✅	✅ collision

Batch Export Script

#!/bin/bash
# export-all.sh — compile to every target

SOURCE=$1
NAME=$(basename "$SOURCE" .holo)

targets=(unity unreal godot vrchat visionos threejs babylon webgpu androidxr urdf sdf dtdl wot usda wasm)

for target in "${targets[@]}"; do
  echo "Compiling to $target..."
  holoscript compile "$SOURCE" --target "$target" --output "./dist/$target/"
done

echo "Done! Output in ./dist/"

Output File Types

Target	Output Files
unity	SceneName.cs MonoBehaviours
unreal	SceneName.h + SceneName.cpp
godot	SceneName.gd
vrchat	SceneName_UdonSharp.cs + .prefab metadata
visionos	SceneName.swift
threejs	SceneName.js with Three.js setup
babylon	SceneName.ts
webgpu	SceneName.ts with WebGPU pipeline
urdf	SceneName.urdf
sdf	SceneName.sdf
dtdl	SceneName.json (DTDL v3)
wot	SceneName.td.jsonld (JSON-LD)
usda	SceneName.usda
wasm	SceneName.wasm + SceneName.js glue

See Also

• Compilers Overview
• Unity Compiler
• VRChat Compiler
• URDF Compiler
• DTDL / IoT